machine/atsamd21: support for USB CDC aka serial interface
Signed-off-by: Ron Evans <ron@hybridgroup.com>
Этот коммит содержится в:
Ron Evans
Ayke van Laethem
родитель
7f027ddd33
коммит
5438f16fcb
4 изменённых файлов: 1545 добавлений и 11 удалений
|
|
@ -34,7 +34,13 @@ const (
|
|||
LED = D13
|
||||
)
|
||||
|
||||
// UART0 pins
|
||||
// UART0 aka USBCDC pins
|
||||
const (
|
||||
USBCDC_DM_PIN = 24
|
||||
USBCDC_DP_PIN = 25
|
||||
)
|
||||
|
||||
// UART1 pins
|
||||
const (
|
||||
UART_TX_PIN = D1
|
||||
UART_RX_PIN = D0
|
||||
|
|
|
|||
|
|
@ -8,9 +8,12 @@
|
|||
package machine
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"device/arm"
|
||||
"device/sam"
|
||||
"encoding/binary"
|
||||
"errors"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
const CPU_FREQUENCY = 48000000
|
||||
|
|
@ -57,6 +60,19 @@ func (p GPIO) Configure(config GPIOConfig) {
|
|||
}
|
||||
// enable port config
|
||||
p.setPinCfg(sam.PORT_PINCFG0_PMUXEN | sam.PORT_PINCFG0_DRVSTR | sam.PORT_PINCFG0_INEN)
|
||||
|
||||
case GPIO_COM:
|
||||
if p.Pin&1 > 0 {
|
||||
// odd pin, so save the even pins
|
||||
val := p.getPMux() & sam.PORT_PMUX0_PMUXE_Msk
|
||||
p.setPMux(val | (GPIO_COM << sam.PORT_PMUX0_PMUXO_Pos))
|
||||
} else {
|
||||
// even pin, so save the odd pins
|
||||
val := p.getPMux() & sam.PORT_PMUX0_PMUXO_Msk
|
||||
p.setPMux(val | (GPIO_COM << sam.PORT_PMUX0_PMUXE_Pos))
|
||||
}
|
||||
// enable port config
|
||||
p.setPinCfg(sam.PORT_PINCFG0_PMUXEN)
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -102,11 +118,14 @@ type UART struct {
|
|||
}
|
||||
|
||||
var (
|
||||
// UART0 is actually a USB CDC interface.
|
||||
UART0 = USBCDC{Buffer: NewRingBuffer()}
|
||||
|
||||
// The first hardware serial port on the SAMD21. Uses the SERCOM0 interface.
|
||||
UART0 = UART{Bus: sam.SERCOM0_USART, Buffer: NewRingBuffer()}
|
||||
UART1 = UART{Bus: sam.SERCOM0_USART, Buffer: NewRingBuffer()}
|
||||
|
||||
// The second hardware serial port on the SAMD21. Uses the SERCOM1 interface.
|
||||
UART1 = UART{Bus: sam.SERCOM1_USART, Buffer: NewRingBuffer()}
|
||||
UART2 = UART{Bus: sam.SERCOM1_USART, Buffer: NewRingBuffer()}
|
||||
)
|
||||
|
||||
const (
|
||||
|
|
@ -249,19 +268,19 @@ func (uart UART) WriteByte(c byte) error {
|
|||
}
|
||||
|
||||
//go:export SERCOM0_IRQHandler
|
||||
func handleUART0() {
|
||||
// should reset IRQ
|
||||
UART0.Receive(byte((UART0.Bus.DATA & 0xFF)))
|
||||
UART0.Bus.INTFLAG |= sam.SERCOM_USART_INTFLAG_RXC
|
||||
}
|
||||
|
||||
//go:export SERCOM1_IRQHandler
|
||||
func handleUART1() {
|
||||
// should reset IRQ
|
||||
UART1.Receive(byte((UART1.Bus.DATA & 0xFF)))
|
||||
UART1.Bus.INTFLAG |= sam.SERCOM_USART_INTFLAG_RXC
|
||||
}
|
||||
|
||||
//go:export SERCOM1_IRQHandler
|
||||
func handleUART2() {
|
||||
// should reset IRQ
|
||||
UART2.Receive(byte((UART2.Bus.DATA & 0xFF)))
|
||||
UART2.Bus.INTFLAG |= sam.SERCOM_USART_INTFLAG_RXC
|
||||
}
|
||||
|
||||
// I2C on the SAMD21.
|
||||
type I2C struct {
|
||||
Bus *sam.SERCOM_I2CM_Type
|
||||
|
|
@ -906,3 +925,901 @@ func (pwm PWM) setChannel(val sam.RegValue) {
|
|||
return // not supported on this pin
|
||||
}
|
||||
}
|
||||
|
||||
// USBCDC is the USB CDC aka serial over USB interface on the SAMD21.
|
||||
type USBCDC struct {
|
||||
Buffer *RingBuffer
|
||||
}
|
||||
|
||||
// WriteByte writes a byte of data to the USB CDC interface.
|
||||
func (usbcdc USBCDC) WriteByte(c byte) error {
|
||||
// Supposedly to handle problem with Windows USB serial ports?
|
||||
if usbLineInfo.lineState > 0 {
|
||||
// set the data
|
||||
udd_ep_in_cache_buffer[usb_CDC_ENDPOINT_IN][0] = c
|
||||
|
||||
usbEndpointDescriptors[usb_CDC_ENDPOINT_IN].DeviceDescBank[1].ADDR =
|
||||
sam.RegValue(uintptr(unsafe.Pointer(&udd_ep_in_cache_buffer[usb_CDC_ENDPOINT_IN])))
|
||||
|
||||
// clean multi packet size of bytes already sent
|
||||
usbEndpointDescriptors[usb_CDC_ENDPOINT_IN].DeviceDescBank[1].PCKSIZE &^=
|
||||
sam.RegValue(usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Mask << usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Pos)
|
||||
|
||||
// set count of bytes to be sent
|
||||
usbEndpointDescriptors[usb_CDC_ENDPOINT_IN].DeviceDescBank[1].PCKSIZE |=
|
||||
sam.RegValue((1&usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask)<<usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos) |
|
||||
sam.RegValue(epPacketSize(64)<<usb_DEVICE_PCKSIZE_SIZE_Pos)
|
||||
|
||||
// ack transfer complete flag
|
||||
setEPINTFLAG(usb_CDC_ENDPOINT_IN, sam.USB_DEVICE_EPINTFLAG_TRCPT1)
|
||||
|
||||
// send data by setting bank ready
|
||||
setEPSTATUSSET(usb_CDC_ENDPOINT_IN, sam.USB_DEVICE_EPSTATUSSET_BK1RDY)
|
||||
|
||||
// wait for transfer to complete
|
||||
for (getEPINTFLAG(usb_CDC_ENDPOINT_IN) & sam.USB_DEVICE_EPINTFLAG_TRCPT1) == 0 {
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
const (
|
||||
// these are SAMD21 specific.
|
||||
usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos = 0
|
||||
usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask = 0x3FFF
|
||||
|
||||
usb_DEVICE_PCKSIZE_SIZE_Pos = 28
|
||||
usb_DEVICE_PCKSIZE_SIZE_Mask = 0x7
|
||||
|
||||
usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Pos = 14
|
||||
usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Mask = 0x3FFF
|
||||
)
|
||||
|
||||
var (
|
||||
usbEndpointDescriptors [8]usbDeviceDescriptor
|
||||
|
||||
udd_ep_in_cache_buffer [7][128]uint8
|
||||
udd_ep_out_cache_buffer [7][128]uint8
|
||||
|
||||
isEndpointHalt = false
|
||||
isRemoteWakeUpEnabled = false
|
||||
endPoints = []uint32{usb_ENDPOINT_TYPE_CONTROL,
|
||||
(usb_ENDPOINT_TYPE_INTERRUPT | usbEndpointIn),
|
||||
(usb_ENDPOINT_TYPE_BULK | usbEndpointOut),
|
||||
(usb_ENDPOINT_TYPE_BULK | usbEndpointIn)}
|
||||
|
||||
usbConfiguration uint8
|
||||
usbSetInterface uint8
|
||||
usbLineInfo = cdcLineInfo{115200, 0x00, 0x00, 0x08, 0x00}
|
||||
)
|
||||
|
||||
// Configure the USB CDC interface. The config is here for compatibility with the UART interface.
|
||||
func (usbcdc USBCDC) Configure(config UARTConfig) {
|
||||
// reset USB interface
|
||||
sam.USB_DEVICE.CTRLA |= sam.USB_DEVICE_CTRLA_SWRST
|
||||
for (sam.USB_DEVICE.SYNCBUSY&sam.USB_DEVICE_SYNCBUSY_SWRST) > 0 ||
|
||||
(sam.USB_DEVICE.SYNCBUSY&sam.USB_DEVICE_SYNCBUSY_ENABLE) > 0 {
|
||||
}
|
||||
|
||||
sam.USB_DEVICE.DESCADD = sam.RegValue(uintptr(unsafe.Pointer(&usbEndpointDescriptors)))
|
||||
|
||||
// configure pins
|
||||
GPIO{USBCDC_DM_PIN}.Configure(GPIOConfig{Mode: GPIO_COM})
|
||||
GPIO{USBCDC_DP_PIN}.Configure(GPIOConfig{Mode: GPIO_COM})
|
||||
|
||||
// performs pad calibration from store fuses
|
||||
handlePadCalibration()
|
||||
|
||||
// run in standby
|
||||
sam.USB_DEVICE.CTRLA |= sam.USB_DEVICE_CTRLA_RUNSTDBY
|
||||
|
||||
// set full speed
|
||||
sam.USB_DEVICE.CTRLB |= (sam.USB_DEVICE_CTRLB_SPDCONF_FS << sam.USB_DEVICE_CTRLB_SPDCONF_Pos)
|
||||
|
||||
// attach
|
||||
sam.USB_DEVICE.CTRLB &^= sam.USB_DEVICE_CTRLB_DETACH
|
||||
|
||||
// enable interrupt for end of reset
|
||||
sam.USB_DEVICE.INTENSET |= sam.USB_DEVICE_INTENSET_EORST
|
||||
|
||||
// enable interrupt for start of frame
|
||||
sam.USB_DEVICE.INTENSET |= sam.USB_DEVICE_INTENSET_SOF
|
||||
|
||||
// enable USB
|
||||
sam.USB_DEVICE.CTRLA |= sam.USB_DEVICE_CTRLA_ENABLE
|
||||
|
||||
// enable IRQ
|
||||
arm.EnableIRQ(sam.IRQ_USB)
|
||||
}
|
||||
|
||||
func handlePadCalibration() {
|
||||
// Load Pad Calibration data from non-volatile memory
|
||||
// This requires registers that are not included in the SVD file.
|
||||
// Modeled after defines from samd21g18a.h and nvmctrl.h:
|
||||
//
|
||||
// #define NVMCTRL_OTP4 0x00806020
|
||||
//
|
||||
// #define USB_FUSES_TRANSN_ADDR (NVMCTRL_OTP4 + 4)
|
||||
// #define USB_FUSES_TRANSN_Pos 13 /**< \brief (NVMCTRL_OTP4) USB pad Transn calibration */
|
||||
// #define USB_FUSES_TRANSN_Msk (0x1Fu << USB_FUSES_TRANSN_Pos)
|
||||
// #define USB_FUSES_TRANSN(value) ((USB_FUSES_TRANSN_Msk & ((value) << USB_FUSES_TRANSN_Pos)))
|
||||
|
||||
// #define USB_FUSES_TRANSP_ADDR (NVMCTRL_OTP4 + 4)
|
||||
// #define USB_FUSES_TRANSP_Pos 18 /**< \brief (NVMCTRL_OTP4) USB pad Transp calibration */
|
||||
// #define USB_FUSES_TRANSP_Msk (0x1Fu << USB_FUSES_TRANSP_Pos)
|
||||
// #define USB_FUSES_TRANSP(value) ((USB_FUSES_TRANSP_Msk & ((value) << USB_FUSES_TRANSP_Pos)))
|
||||
|
||||
// #define USB_FUSES_TRIM_ADDR (NVMCTRL_OTP4 + 4)
|
||||
// #define USB_FUSES_TRIM_Pos 23 /**< \brief (NVMCTRL_OTP4) USB pad Trim calibration */
|
||||
// #define USB_FUSES_TRIM_Msk (0x7u << USB_FUSES_TRIM_Pos)
|
||||
// #define USB_FUSES_TRIM(value) ((USB_FUSES_TRIM_Msk & ((value) << USB_FUSES_TRIM_Pos)))
|
||||
//
|
||||
fuse := *(*uint32)(unsafe.Pointer(uintptr(0x00806020) + 4))
|
||||
calibTransN := sam.RegValue16(uint16(fuse>>13) & uint16(0x1f))
|
||||
calibTransP := sam.RegValue16(uint16(fuse>>18) & uint16(0x1f))
|
||||
calibTrim := sam.RegValue16(uint16(fuse>>23) & uint16(0x7))
|
||||
|
||||
if calibTransN == 0x1f {
|
||||
calibTransN = 5
|
||||
}
|
||||
sam.USB_DEVICE.PADCAL |= (calibTransN << sam.USB_DEVICE_PADCAL_TRANSN_Pos)
|
||||
|
||||
if calibTransP == 0x1f {
|
||||
calibTransP = 29
|
||||
}
|
||||
sam.USB_DEVICE.PADCAL |= (calibTransP << sam.USB_DEVICE_PADCAL_TRANSP_Pos)
|
||||
|
||||
if calibTrim == 0x7 {
|
||||
calibTransN = 3
|
||||
}
|
||||
sam.USB_DEVICE.PADCAL |= (calibTrim << sam.USB_DEVICE_PADCAL_TRIM_Pos)
|
||||
}
|
||||
|
||||
//go:export USB_IRQHandler
|
||||
func handleUSB() {
|
||||
// reset all interrupt flags
|
||||
flags := sam.USB_DEVICE.INTFLAG
|
||||
sam.USB_DEVICE.INTFLAG = flags
|
||||
|
||||
// End of reset
|
||||
if (flags & sam.USB_DEVICE_INTFLAG_EORST) > 0 {
|
||||
// Configure control endpoint
|
||||
initEndpoint(0, usb_ENDPOINT_TYPE_CONTROL)
|
||||
|
||||
// Enable Setup-Received interrupt
|
||||
setEPINTENSET(0, sam.USB_DEVICE_EPINTENSET_RXSTP)
|
||||
|
||||
usbConfiguration = 0
|
||||
|
||||
// ack the End-Of-Reset interrupt
|
||||
sam.USB_DEVICE.INTFLAG = sam.USB_DEVICE_INTFLAG_EORST
|
||||
}
|
||||
|
||||
// Start of frame
|
||||
if (flags & sam.USB_DEVICE_INTFLAG_SOF) > 0 {
|
||||
// if you want to blink LED showing traffic, this would be the place...
|
||||
}
|
||||
|
||||
// Endpoint 0 Setup interrupt
|
||||
if getEPINTFLAG(0)&sam.USB_DEVICE_EPINTFLAG_RXSTP > 0 {
|
||||
// ack setup received
|
||||
setEPINTFLAG(0, sam.USB_DEVICE_EPINTFLAG_RXSTP)
|
||||
|
||||
// parse setup
|
||||
setup := newUSBSetup(udd_ep_out_cache_buffer[0][:])
|
||||
|
||||
// Clear the Bank 0 ready flag on Control OUT
|
||||
setEPSTATUSCLR(0, sam.USB_DEVICE_EPSTATUSCLR_BK0RDY)
|
||||
|
||||
ok := false
|
||||
if (setup.bmRequestType & usb_REQUEST_TYPE) == usb_REQUEST_STANDARD {
|
||||
// Standard Requests
|
||||
ok = handleStandardSetup(setup)
|
||||
} else {
|
||||
// Class Interface Requests
|
||||
if setup.wIndex == usb_CDC_ACM_INTERFACE {
|
||||
ok = cdcSetup(setup)
|
||||
}
|
||||
}
|
||||
|
||||
if ok {
|
||||
// set Bank1 ready
|
||||
setEPSTATUSSET(0, sam.USB_DEVICE_EPSTATUSSET_BK1RDY)
|
||||
} else {
|
||||
// Stall endpoint
|
||||
setEPSTATUSSET(0, sam.USB_DEVICE_EPINTFLAG_STALL1)
|
||||
}
|
||||
|
||||
if getEPINTFLAG(0)&sam.USB_DEVICE_EPINTFLAG_STALL1 > 0 {
|
||||
// ack the stall
|
||||
setEPINTFLAG(0, sam.USB_DEVICE_EPINTFLAG_STALL1)
|
||||
|
||||
// clear stall request
|
||||
setEPINTENCLR(0, sam.USB_DEVICE_EPINTENCLR_STALL1)
|
||||
}
|
||||
}
|
||||
|
||||
// Now the actual transfer handlers
|
||||
eptInts := sam.USB_DEVICE.EPINTSMRY & 0xFE // Remove endpoint number 0 (setup)
|
||||
var i uint32
|
||||
for i = 1; i < uint32(len(endPoints)); i++ {
|
||||
// Check if endpoint has a pending interrupt
|
||||
if eptInts&(1<<i) > 0 {
|
||||
// yes, so handle flags
|
||||
epFlags := getEPINTFLAG(i)
|
||||
setEPINTFLAG(i, epFlags)
|
||||
|
||||
// Endpoint Transfer Complete Interrupt
|
||||
if (epFlags & sam.USB_DEVICE_EPINTFLAG_TRCPT0) > 0 {
|
||||
handleEndpoint(i)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func initEndpoint(ep, config uint32) {
|
||||
switch config {
|
||||
case usb_ENDPOINT_TYPE_INTERRUPT | usbEndpointIn:
|
||||
// set packet size
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[1].PCKSIZE |=
|
||||
sam.RegValue(epPacketSize(64) << usb_DEVICE_PCKSIZE_SIZE_Pos)
|
||||
|
||||
// set data buffer address
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[1].ADDR =
|
||||
sam.RegValue(uintptr(unsafe.Pointer(&udd_ep_in_cache_buffer[ep])))
|
||||
|
||||
// set endpoint type
|
||||
setEPCFG(ep, getEPCFG(ep)|((usb_ENDPOINT_TYPE_INTERRUPT+1)<<sam.USB_DEVICE_EPCFG_EPTYPE1_Pos))
|
||||
|
||||
case usb_ENDPOINT_TYPE_BULK | usbEndpointOut:
|
||||
// set packet size
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE |=
|
||||
sam.RegValue(epPacketSize(64) << usb_DEVICE_PCKSIZE_SIZE_Pos)
|
||||
|
||||
// set data buffer address
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[0].ADDR =
|
||||
sam.RegValue(uintptr(unsafe.Pointer(&udd_ep_out_cache_buffer[ep])))
|
||||
|
||||
// set endpoint type
|
||||
setEPCFG(ep, getEPCFG(ep)|((usb_ENDPOINT_TYPE_BULK+1)<<sam.USB_DEVICE_EPCFG_EPTYPE0_Pos))
|
||||
|
||||
// ack the current transfer
|
||||
setEPINTENSET(ep, sam.USB_DEVICE_EPINTENSET_TRCPT0)
|
||||
|
||||
// ready for next transfer
|
||||
setEPSTATUSCLR(ep, sam.USB_DEVICE_EPSTATUSCLR_BK0RDY)
|
||||
|
||||
case usb_ENDPOINT_TYPE_INTERRUPT | usbEndpointOut:
|
||||
// TODO: not really anything, seems like...
|
||||
|
||||
case usb_ENDPOINT_TYPE_BULK | usbEndpointIn:
|
||||
// set packet size
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[1].PCKSIZE |=
|
||||
sam.RegValue(epPacketSize(64) << usb_DEVICE_PCKSIZE_SIZE_Pos)
|
||||
|
||||
// set data buffer address
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[1].ADDR =
|
||||
sam.RegValue(uintptr(unsafe.Pointer(&udd_ep_in_cache_buffer[ep])))
|
||||
|
||||
// set endpoint type
|
||||
setEPCFG(ep, getEPCFG(ep)|((usb_ENDPOINT_TYPE_BULK+1)<<sam.USB_DEVICE_EPCFG_EPTYPE1_Pos))
|
||||
|
||||
// NAK on endpoint IN, the bank is not yet filled in.
|
||||
setEPSTATUSCLR(ep, sam.USB_DEVICE_EPSTATUSCLR_BK1RDY)
|
||||
|
||||
case usb_ENDPOINT_TYPE_CONTROL:
|
||||
// Control OUT
|
||||
// set packet size
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE |=
|
||||
sam.RegValue(epPacketSize(64) << usb_DEVICE_PCKSIZE_SIZE_Pos)
|
||||
|
||||
// set data buffer address
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[0].ADDR =
|
||||
sam.RegValue(uintptr(unsafe.Pointer(&udd_ep_out_cache_buffer[ep])))
|
||||
|
||||
// set endpoint type
|
||||
setEPCFG(ep, getEPCFG(ep)|((usb_ENDPOINT_TYPE_CONTROL+1)<<sam.USB_DEVICE_EPCFG_EPTYPE0_Pos))
|
||||
|
||||
// Control IN
|
||||
// set packet size
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[1].PCKSIZE |=
|
||||
sam.RegValue(epPacketSize(64) << usb_DEVICE_PCKSIZE_SIZE_Pos)
|
||||
|
||||
// set data buffer address
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[1].ADDR =
|
||||
sam.RegValue(uintptr(unsafe.Pointer(&udd_ep_in_cache_buffer[ep])))
|
||||
|
||||
// set endpoint type
|
||||
setEPCFG(ep, getEPCFG(ep)|((usb_ENDPOINT_TYPE_CONTROL+1)<<sam.USB_DEVICE_EPCFG_EPTYPE1_Pos))
|
||||
|
||||
// Prepare OUT endpoint for receive
|
||||
// set multi packet size for expected number of receive bytes on control OUT
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE |=
|
||||
sam.RegValue(64 << usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Pos)
|
||||
|
||||
// set byte count to zero, we have not received anything yet
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE &^=
|
||||
sam.RegValue(usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)
|
||||
|
||||
// NAK on endpoint OUT to show we are ready to receive control data
|
||||
setEPSTATUSSET(ep, sam.USB_DEVICE_EPSTATUSSET_BK0RDY)
|
||||
}
|
||||
}
|
||||
|
||||
func handleStandardSetup(setup usbSetup) bool {
|
||||
switch setup.bRequest {
|
||||
case usb_GET_STATUS:
|
||||
buf := []byte{0, 0}
|
||||
|
||||
if setup.bmRequestType != 0 { // endpoint
|
||||
// TODO: actually check if the endpoint in question is currently halted
|
||||
if isEndpointHalt {
|
||||
buf[0] = 1
|
||||
}
|
||||
}
|
||||
|
||||
sendUSBPacket(0, buf)
|
||||
return true
|
||||
|
||||
case usb_CLEAR_FEATURE:
|
||||
if setup.wValueL == 1 { // DEVICEREMOTEWAKEUP
|
||||
isRemoteWakeUpEnabled = false
|
||||
} else if setup.wValueL == 0 { // ENDPOINTHALT
|
||||
isEndpointHalt = false
|
||||
}
|
||||
sendZlp(0)
|
||||
return true
|
||||
|
||||
case usb_SET_FEATURE:
|
||||
if setup.wValueL == 1 { // DEVICEREMOTEWAKEUP
|
||||
isRemoteWakeUpEnabled = true
|
||||
} else if setup.wValueL == 0 { // ENDPOINTHALT
|
||||
isEndpointHalt = true
|
||||
}
|
||||
sendZlp(0)
|
||||
return true
|
||||
|
||||
case usb_SET_ADDRESS:
|
||||
// set packet size 64 with auto Zlp after transfer
|
||||
usbEndpointDescriptors[0].DeviceDescBank[1].PCKSIZE =
|
||||
sam.RegValue(epPacketSize(64)<<usb_DEVICE_PCKSIZE_SIZE_Pos) |
|
||||
sam.RegValue(1<<31) // autozlp
|
||||
|
||||
// ack the transfer is complete from the request
|
||||
setEPINTFLAG(0, sam.USB_DEVICE_EPINTFLAG_TRCPT1)
|
||||
|
||||
// set bank ready for data
|
||||
setEPSTATUSSET(0, sam.USB_DEVICE_EPSTATUSSET_BK1RDY)
|
||||
|
||||
// wait for transfer to complete
|
||||
for (getEPINTFLAG(0) & sam.USB_DEVICE_EPINTFLAG_TRCPT1) == 0 {
|
||||
}
|
||||
|
||||
// last, set the device address to that requested by host
|
||||
sam.USB_DEVICE.DADD |= sam.RegValue8(setup.wValueL)
|
||||
sam.USB_DEVICE.DADD |= sam.USB_DEVICE_DADD_ADDEN
|
||||
|
||||
return true
|
||||
|
||||
case usb_GET_DESCRIPTOR:
|
||||
sendDescriptor(setup)
|
||||
return true
|
||||
|
||||
case usb_SET_DESCRIPTOR:
|
||||
return false
|
||||
|
||||
case usb_GET_CONFIGURATION:
|
||||
buff := []byte{usbConfiguration}
|
||||
sendUSBPacket(0, buff)
|
||||
return true
|
||||
|
||||
case usb_SET_CONFIGURATION:
|
||||
if setup.bmRequestType&usb_REQUEST_RECIPIENT == usb_REQUEST_DEVICE {
|
||||
for i := 1; i < len(endPoints); i++ {
|
||||
initEndpoint(uint32(i), endPoints[i])
|
||||
}
|
||||
|
||||
usbConfiguration = setup.wValueL
|
||||
|
||||
// Enable interrupt for CDC control messages from host (OUT packet)
|
||||
setEPINTENSET(usb_CDC_ENDPOINT_ACM, sam.USB_DEVICE_EPINTENSET_TRCPT1)
|
||||
|
||||
// Enable interrupt for CDC data messages from host
|
||||
setEPINTENSET(usb_CDC_ENDPOINT_OUT, sam.USB_DEVICE_EPINTENSET_TRCPT0)
|
||||
|
||||
sendZlp(0)
|
||||
return true
|
||||
} else {
|
||||
return false
|
||||
}
|
||||
|
||||
case usb_GET_INTERFACE:
|
||||
buff := []byte{usbSetInterface}
|
||||
sendUSBPacket(0, buff)
|
||||
return true
|
||||
|
||||
case usb_SET_INTERFACE:
|
||||
usbSetInterface = setup.wValueL
|
||||
|
||||
sendZlp(0)
|
||||
return true
|
||||
|
||||
default:
|
||||
return true
|
||||
}
|
||||
}
|
||||
|
||||
func cdcSetup(setup usbSetup) bool {
|
||||
if setup.bmRequestType == usb_REQUEST_DEVICETOHOST_CLASS_INTERFACE {
|
||||
if setup.bRequest == usb_CDC_GET_LINE_CODING {
|
||||
buf := bytes.NewBuffer(make([]byte, 0, 7))
|
||||
binary.Write(buf, binary.LittleEndian, usbLineInfo.dwDTERate)
|
||||
binary.Write(buf, binary.LittleEndian, usbLineInfo.bCharFormat)
|
||||
binary.Write(buf, binary.LittleEndian, usbLineInfo.bParityType)
|
||||
binary.Write(buf, binary.LittleEndian, usbLineInfo.bDataBits)
|
||||
|
||||
sendUSBPacket(0, buf.Bytes())
|
||||
return true
|
||||
}
|
||||
}
|
||||
|
||||
if setup.bmRequestType == usb_REQUEST_HOSTTODEVICE_CLASS_INTERFACE {
|
||||
if setup.bRequest == usb_CDC_SET_LINE_CODING {
|
||||
buf := bytes.NewBuffer(receiveUSBControlPacket())
|
||||
binary.Read(buf, binary.LittleEndian, &(usbLineInfo.dwDTERate))
|
||||
binary.Read(buf, binary.LittleEndian, &(usbLineInfo.bCharFormat))
|
||||
binary.Read(buf, binary.LittleEndian, &(usbLineInfo.bParityType))
|
||||
binary.Read(buf, binary.LittleEndian, &(usbLineInfo.bDataBits))
|
||||
}
|
||||
|
||||
if setup.bRequest == usb_CDC_SET_CONTROL_LINE_STATE {
|
||||
usbLineInfo.lineState = setup.wValueL
|
||||
}
|
||||
|
||||
if setup.bRequest == usb_CDC_SET_LINE_CODING || setup.bRequest == usb_CDC_SET_CONTROL_LINE_STATE {
|
||||
// auto-reset into the bootloader
|
||||
if usbLineInfo.dwDTERate == 1200 && (usbLineInfo.lineState&0x01) == 0 {
|
||||
// TODO: system reset
|
||||
} else {
|
||||
// TODO: cancel any reset
|
||||
}
|
||||
}
|
||||
|
||||
if setup.bRequest == usb_CDC_SEND_BREAK {
|
||||
// TODO: something with this value?
|
||||
// breakValue = ((uint16_t)setup.wValueH << 8) | setup.wValueL;
|
||||
// return false;
|
||||
}
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func sendUSBPacket(ep uint32, data []byte) {
|
||||
copy(udd_ep_in_cache_buffer[ep][:], data)
|
||||
|
||||
// Set endpoint address for sending data
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[1].ADDR =
|
||||
sam.RegValue(uintptr(unsafe.Pointer(&udd_ep_in_cache_buffer[ep])))
|
||||
|
||||
// clear multi-packet size which is total bytes already sent
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[1].PCKSIZE &^=
|
||||
sam.RegValue(usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Mask << usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Pos)
|
||||
|
||||
// set byte count, which is total number of bytes to be sent
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[1].PCKSIZE |=
|
||||
sam.RegValue((len(data) & usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask) << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)
|
||||
}
|
||||
|
||||
func receiveUSBControlPacket() []byte {
|
||||
// set ready to receive data
|
||||
setEPSTATUSCLR(0, sam.USB_DEVICE_EPSTATUSCLR_BK0RDY)
|
||||
|
||||
// read the data
|
||||
bytesread := armRecvCtrlOUT(0)
|
||||
|
||||
// return the data
|
||||
data := make([]byte, 0, bytesread)
|
||||
copy(data, udd_ep_out_cache_buffer[0][:bytesread])
|
||||
return data
|
||||
}
|
||||
|
||||
func armRecvCtrlOUT(ep uint32) uint32 {
|
||||
// Set output address to receive data
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[0].ADDR =
|
||||
sam.RegValue(uintptr(unsafe.Pointer(&udd_ep_out_cache_buffer[ep])))
|
||||
|
||||
// set multi-packet size which is total expected number of bytes to receive.
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE |=
|
||||
sam.RegValue(8<<usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Pos) |
|
||||
sam.RegValue(epPacketSize(64)<<usb_DEVICE_PCKSIZE_SIZE_Pos)
|
||||
|
||||
// clear byte count of bytes received so far.
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE &^=
|
||||
sam.RegValue(usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)
|
||||
|
||||
// clear ready state to start transfer
|
||||
setEPSTATUSCLR(ep, sam.USB_DEVICE_EPSTATUSCLR_BK0RDY)
|
||||
|
||||
// Wait until OUT transfer is ready.
|
||||
for (getEPSTATUS(ep) & sam.USB_DEVICE_EPSTATUS_BK0RDY) == 0 {
|
||||
}
|
||||
|
||||
// Wait until OUT transfer is completed.
|
||||
for (getEPINTFLAG(ep) & sam.USB_DEVICE_EPINTFLAG_TRCPT0) == 0 {
|
||||
}
|
||||
|
||||
// return number of bytes received
|
||||
return uint32((usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE >>
|
||||
usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos) & usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask)
|
||||
}
|
||||
|
||||
// sendDescriptor creates and sends the various USB descriptor types that
|
||||
// can be requested by the host.
|
||||
func sendDescriptor(setup usbSetup) {
|
||||
switch setup.wValueH {
|
||||
case usb_CONFIGURATION_DESCRIPTOR_TYPE:
|
||||
sendConfiguration(setup)
|
||||
return
|
||||
case usb_DEVICE_DESCRIPTOR_TYPE:
|
||||
if setup.wLength == 8 {
|
||||
// composite descriptor requested, so only send 8 bytes
|
||||
dd := NewDeviceDescriptor(0xEF, 0x02, 0x01, 64, usb_VID, usb_PID, 0x100, usb_IMANUFACTURER, usb_IPRODUCT, usb_ISERIAL, 1)
|
||||
sendUSBPacket(0, dd.Bytes()[:8])
|
||||
} else {
|
||||
// complete descriptor requested so send entire packet
|
||||
dd := NewDeviceDescriptor(0x00, 0x00, 0x00, 64, usb_VID, usb_PID, 0x100, usb_IMANUFACTURER, usb_IPRODUCT, usb_ISERIAL, 1)
|
||||
sendUSBPacket(0, dd.Bytes())
|
||||
}
|
||||
return
|
||||
|
||||
case usb_STRING_DESCRIPTOR_TYPE:
|
||||
switch setup.wValueL {
|
||||
case 0:
|
||||
b := make([]byte, 4)
|
||||
b[0] = byte(usb_STRING_LANGUAGE[0] >> 8)
|
||||
b[1] = byte(usb_STRING_LANGUAGE[0] & 0xff)
|
||||
b[2] = byte(usb_STRING_LANGUAGE[1] >> 8)
|
||||
b[3] = byte(usb_STRING_LANGUAGE[1] & 0xff)
|
||||
sendUSBPacket(0, b)
|
||||
|
||||
case usb_IPRODUCT:
|
||||
prod := []byte(usb_STRING_PRODUCT)
|
||||
b := make([]byte, len(prod)*2+2)
|
||||
b[0] = byte(len(prod)*2 + 2)
|
||||
b[1] = 0x03
|
||||
|
||||
for i, val := range prod {
|
||||
b[i*2] = 0
|
||||
b[i*2+1] = val
|
||||
}
|
||||
|
||||
sendUSBPacket(0, b)
|
||||
|
||||
case usb_IMANUFACTURER:
|
||||
prod := []byte(usb_STRING_MANUFACTURER)
|
||||
b := make([]byte, len(prod)*2+2)
|
||||
b[0] = byte(len(prod)*2 + 2)
|
||||
b[1] = 0x03
|
||||
|
||||
for i, val := range prod {
|
||||
b[i*2] = 0
|
||||
b[i*2+1] = val
|
||||
}
|
||||
|
||||
sendUSBPacket(0, b)
|
||||
|
||||
case usb_ISERIAL:
|
||||
// TODO: allow returning a product serial number
|
||||
sendZlp(0)
|
||||
}
|
||||
|
||||
// send final zero length packet and return
|
||||
sendZlp(0)
|
||||
return
|
||||
}
|
||||
|
||||
// do not know how to handle this message, so return zero
|
||||
sendZlp(0)
|
||||
return
|
||||
}
|
||||
|
||||
// sendConfiguration creates and sends the configuration packet to the host.
|
||||
func sendConfiguration(setup usbSetup) {
|
||||
if setup.wLength == 9 {
|
||||
sz := uint16(configDescriptorSize + cdcSize)
|
||||
config := NewConfigDescriptor(sz, 2)
|
||||
sendUSBPacket(0, config.Bytes())
|
||||
} else {
|
||||
iad := NewIADDescriptor(0, 2, usb_CDC_COMMUNICATION_INTERFACE_CLASS, usb_CDC_ABSTRACT_CONTROL_MODEL, 0)
|
||||
|
||||
cif := NewInterfaceDescriptor(usb_CDC_ACM_INTERFACE, 1, usb_CDC_COMMUNICATION_INTERFACE_CLASS, usb_CDC_ABSTRACT_CONTROL_MODEL, 0)
|
||||
|
||||
header := NewCDCCSInterfaceDescriptor(usb_CDC_HEADER, usb_CDC_V1_10&0xFF, (usb_CDC_V1_10>>8)&0x0FF)
|
||||
|
||||
controlManagement := NewACMFunctionalDescriptor(usb_CDC_ABSTRACT_CONTROL_MANAGEMENT, 6)
|
||||
|
||||
functionalDescriptor := NewCDCCSInterfaceDescriptor(usb_CDC_UNION, usb_CDC_ACM_INTERFACE, usb_CDC_DATA_INTERFACE)
|
||||
|
||||
callManagement := NewCMFunctionalDescriptor(usb_CDC_CALL_MANAGEMENT, 1, 1)
|
||||
|
||||
cifin := NewEndpointDescriptor((usb_CDC_ENDPOINT_ACM | usbEndpointIn), usb_ENDPOINT_TYPE_INTERRUPT, 0x10, 0x10)
|
||||
|
||||
dif := NewInterfaceDescriptor(usb_CDC_DATA_INTERFACE, 2, usb_CDC_DATA_INTERFACE_CLASS, 0, 0)
|
||||
|
||||
in := NewEndpointDescriptor((usb_CDC_ENDPOINT_OUT | usbEndpointOut), usb_ENDPOINT_TYPE_BULK, usbEndpointPacketSize, 0)
|
||||
|
||||
out := NewEndpointDescriptor((usb_CDC_ENDPOINT_IN | usbEndpointIn), usb_ENDPOINT_TYPE_BULK, usbEndpointPacketSize, 0)
|
||||
|
||||
cdc := NewCDCDescriptor(iad,
|
||||
cif,
|
||||
header,
|
||||
controlManagement,
|
||||
functionalDescriptor,
|
||||
callManagement,
|
||||
cifin,
|
||||
dif,
|
||||
in,
|
||||
out)
|
||||
|
||||
sz := uint16(configDescriptorSize + cdcSize)
|
||||
config := NewConfigDescriptor(sz, 2)
|
||||
|
||||
buf := make([]byte, 0, sz)
|
||||
buf = append(buf, config.Bytes()...)
|
||||
buf = append(buf, cdc.Bytes()...)
|
||||
|
||||
sendUSBPacket(0, buf)
|
||||
}
|
||||
}
|
||||
|
||||
func handleEndpoint(ep uint32) {
|
||||
// get data
|
||||
count := int((usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE >>
|
||||
usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos) & usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask)
|
||||
|
||||
// move to ring buffer
|
||||
for i := 0; i < count; i++ {
|
||||
UART0.Receive(byte((udd_ep_out_cache_buffer[ep][i] & 0xFF)))
|
||||
}
|
||||
|
||||
// set ready for next data
|
||||
setEPSTATUSCLR(ep, sam.USB_DEVICE_EPSTATUSCLR_BK0RDY)
|
||||
|
||||
}
|
||||
|
||||
func sendZlp(ep uint32) {
|
||||
usbEndpointDescriptors[ep].DeviceDescBank[1].PCKSIZE &^=
|
||||
sam.RegValue(usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)
|
||||
}
|
||||
|
||||
func epPacketSize(size uint16) uint32 {
|
||||
switch size {
|
||||
case 8:
|
||||
return 0
|
||||
case 16:
|
||||
return 1
|
||||
case 32:
|
||||
return 2
|
||||
case 64:
|
||||
return 3
|
||||
case 128:
|
||||
return 4
|
||||
case 256:
|
||||
return 5
|
||||
case 512:
|
||||
return 6
|
||||
case 1023:
|
||||
return 7
|
||||
default:
|
||||
return 0
|
||||
}
|
||||
}
|
||||
|
||||
func getEPCFG(ep uint32) sam.RegValue8 {
|
||||
switch ep {
|
||||
case 0:
|
||||
return sam.USB_DEVICE.EPCFG0
|
||||
case 1:
|
||||
return sam.USB_DEVICE.EPCFG1
|
||||
case 2:
|
||||
return sam.USB_DEVICE.EPCFG2
|
||||
case 3:
|
||||
return sam.USB_DEVICE.EPCFG3
|
||||
case 4:
|
||||
return sam.USB_DEVICE.EPCFG4
|
||||
case 5:
|
||||
return sam.USB_DEVICE.EPCFG5
|
||||
case 6:
|
||||
return sam.USB_DEVICE.EPCFG6
|
||||
case 7:
|
||||
return sam.USB_DEVICE.EPCFG7
|
||||
default:
|
||||
return 0
|
||||
}
|
||||
}
|
||||
|
||||
func setEPCFG(ep uint32, val sam.RegValue8) {
|
||||
switch ep {
|
||||
case 0:
|
||||
sam.USB_DEVICE.EPCFG0 = val
|
||||
case 1:
|
||||
sam.USB_DEVICE.EPCFG1 = val
|
||||
case 2:
|
||||
sam.USB_DEVICE.EPCFG2 = val
|
||||
case 3:
|
||||
sam.USB_DEVICE.EPCFG3 = val
|
||||
case 4:
|
||||
sam.USB_DEVICE.EPCFG4 = val
|
||||
case 5:
|
||||
sam.USB_DEVICE.EPCFG5 = val
|
||||
case 6:
|
||||
sam.USB_DEVICE.EPCFG6 = val
|
||||
case 7:
|
||||
sam.USB_DEVICE.EPCFG7 = val
|
||||
default:
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
func setEPSTATUSCLR(ep uint32, val sam.RegValue8) {
|
||||
switch ep {
|
||||
case 0:
|
||||
sam.USB_DEVICE.EPSTATUSCLR0 = val
|
||||
case 1:
|
||||
sam.USB_DEVICE.EPSTATUSCLR1 = val
|
||||
case 2:
|
||||
sam.USB_DEVICE.EPSTATUSCLR2 = val
|
||||
case 3:
|
||||
sam.USB_DEVICE.EPSTATUSCLR3 = val
|
||||
case 4:
|
||||
sam.USB_DEVICE.EPSTATUSCLR4 = val
|
||||
case 5:
|
||||
sam.USB_DEVICE.EPSTATUSCLR5 = val
|
||||
case 6:
|
||||
sam.USB_DEVICE.EPSTATUSCLR6 = val
|
||||
case 7:
|
||||
sam.USB_DEVICE.EPSTATUSCLR7 = val
|
||||
default:
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
func setEPSTATUSSET(ep uint32, val sam.RegValue8) {
|
||||
switch ep {
|
||||
case 0:
|
||||
sam.USB_DEVICE.EPSTATUSSET0 = val
|
||||
case 1:
|
||||
sam.USB_DEVICE.EPSTATUSSET1 = val
|
||||
case 2:
|
||||
sam.USB_DEVICE.EPSTATUSSET2 = val
|
||||
case 3:
|
||||
sam.USB_DEVICE.EPSTATUSSET3 = val
|
||||
case 4:
|
||||
sam.USB_DEVICE.EPSTATUSSET4 = val
|
||||
case 5:
|
||||
sam.USB_DEVICE.EPSTATUSSET5 = val
|
||||
case 6:
|
||||
sam.USB_DEVICE.EPSTATUSSET6 = val
|
||||
case 7:
|
||||
sam.USB_DEVICE.EPSTATUSSET7 = val
|
||||
default:
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
func getEPSTATUS(ep uint32) sam.RegValue8 {
|
||||
switch ep {
|
||||
case 0:
|
||||
return sam.USB_DEVICE.EPSTATUS0
|
||||
case 1:
|
||||
return sam.USB_DEVICE.EPSTATUS1
|
||||
case 2:
|
||||
return sam.USB_DEVICE.EPSTATUS2
|
||||
case 3:
|
||||
return sam.USB_DEVICE.EPSTATUS3
|
||||
case 4:
|
||||
return sam.USB_DEVICE.EPSTATUS4
|
||||
case 5:
|
||||
return sam.USB_DEVICE.EPSTATUS5
|
||||
case 6:
|
||||
return sam.USB_DEVICE.EPSTATUS6
|
||||
case 7:
|
||||
return sam.USB_DEVICE.EPSTATUS7
|
||||
default:
|
||||
return 0
|
||||
}
|
||||
}
|
||||
|
||||
func getEPINTFLAG(ep uint32) sam.RegValue8 {
|
||||
switch ep {
|
||||
case 0:
|
||||
return sam.USB_DEVICE.EPINTFLAG0
|
||||
case 1:
|
||||
return sam.USB_DEVICE.EPINTFLAG1
|
||||
case 2:
|
||||
return sam.USB_DEVICE.EPINTFLAG2
|
||||
case 3:
|
||||
return sam.USB_DEVICE.EPINTFLAG3
|
||||
case 4:
|
||||
return sam.USB_DEVICE.EPINTFLAG4
|
||||
case 5:
|
||||
return sam.USB_DEVICE.EPINTFLAG5
|
||||
case 6:
|
||||
return sam.USB_DEVICE.EPINTFLAG6
|
||||
case 7:
|
||||
return sam.USB_DEVICE.EPINTFLAG7
|
||||
default:
|
||||
return 0
|
||||
}
|
||||
}
|
||||
|
||||
func setEPINTFLAG(ep uint32, val sam.RegValue8) {
|
||||
switch ep {
|
||||
case 0:
|
||||
sam.USB_DEVICE.EPINTFLAG0 = val
|
||||
case 1:
|
||||
sam.USB_DEVICE.EPINTFLAG1 = val
|
||||
case 2:
|
||||
sam.USB_DEVICE.EPINTFLAG2 = val
|
||||
case 3:
|
||||
sam.USB_DEVICE.EPINTFLAG3 = val
|
||||
case 4:
|
||||
sam.USB_DEVICE.EPINTFLAG4 = val
|
||||
case 5:
|
||||
sam.USB_DEVICE.EPINTFLAG5 = val
|
||||
case 6:
|
||||
sam.USB_DEVICE.EPINTFLAG6 = val
|
||||
case 7:
|
||||
sam.USB_DEVICE.EPINTFLAG7 = val
|
||||
default:
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
func setEPINTENCLR(ep uint32, val sam.RegValue8) {
|
||||
switch ep {
|
||||
case 0:
|
||||
sam.USB_DEVICE.EPINTENCLR0 = val
|
||||
case 1:
|
||||
sam.USB_DEVICE.EPINTENCLR1 = val
|
||||
case 2:
|
||||
sam.USB_DEVICE.EPINTENCLR2 = val
|
||||
case 3:
|
||||
sam.USB_DEVICE.EPINTENCLR3 = val
|
||||
case 4:
|
||||
sam.USB_DEVICE.EPINTENCLR4 = val
|
||||
case 5:
|
||||
sam.USB_DEVICE.EPINTENCLR5 = val
|
||||
case 6:
|
||||
sam.USB_DEVICE.EPINTENCLR6 = val
|
||||
case 7:
|
||||
sam.USB_DEVICE.EPINTENCLR7 = val
|
||||
default:
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
func setEPINTENSET(ep uint32, val sam.RegValue8) {
|
||||
switch ep {
|
||||
case 0:
|
||||
sam.USB_DEVICE.EPINTENSET0 = val
|
||||
case 1:
|
||||
sam.USB_DEVICE.EPINTENSET1 = val
|
||||
case 2:
|
||||
sam.USB_DEVICE.EPINTENSET2 = val
|
||||
case 3:
|
||||
sam.USB_DEVICE.EPINTENSET3 = val
|
||||
case 4:
|
||||
sam.USB_DEVICE.EPINTENSET4 = val
|
||||
case 5:
|
||||
sam.USB_DEVICE.EPINTENSET5 = val
|
||||
case 6:
|
||||
sam.USB_DEVICE.EPINTENSET6 = val
|
||||
case 7:
|
||||
sam.USB_DEVICE.EPINTENSET7 = val
|
||||
default:
|
||||
return
|
||||
}
|
||||
}
|
||||
|
|
|
|||
599
src/machine/usb.go
Обычный файл
599
src/machine/usb.go
Обычный файл
|
|
@ -0,0 +1,599 @@
|
|||
// +build sam
|
||||
|
||||
package machine
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"device/sam"
|
||||
"encoding/binary"
|
||||
"errors"
|
||||
)
|
||||
|
||||
const deviceDescriptorSize = 18
|
||||
|
||||
// DeviceDescriptor implements the USB standard device descriptor.
|
||||
//
|
||||
// Table 9-8. Standard Device Descriptor
|
||||
// bLength, bDescriptorType, bcdUSB, bDeviceClass, bDeviceSubClass, bDeviceProtocol, bMaxPacketSize0,
|
||||
// idVendor, idProduct, bcdDevice, iManufacturer, iProduct, iSerialNumber, bNumConfigurations */
|
||||
//
|
||||
type DeviceDescriptor struct {
|
||||
bLength uint8 // 18
|
||||
bDescriptorType uint8 // 1 USB_DEVICE_DESCRIPTOR_TYPE
|
||||
bcdUSB uint16 // 0x200
|
||||
bDeviceClass uint8
|
||||
bDeviceSubClass uint8
|
||||
bDeviceProtocol uint8
|
||||
bMaxPacketSize0 uint8 // Packet 0
|
||||
idVendor uint16
|
||||
idProduct uint16
|
||||
bcdDevice uint16 // 0x100
|
||||
iManufacturer uint8
|
||||
iProduct uint8
|
||||
iSerialNumber uint8
|
||||
bNumConfigurations uint8
|
||||
}
|
||||
|
||||
// NewDeviceDescriptor returns a USB DeviceDescriptor.
|
||||
func NewDeviceDescriptor(class, subClass, proto, packetSize0 uint8, vid, pid, version uint16, im, ip, is, configs uint8) DeviceDescriptor {
|
||||
return DeviceDescriptor{deviceDescriptorSize, 1, 0x200, class, subClass, proto, packetSize0, vid, pid, version, im, ip, is, configs}
|
||||
}
|
||||
|
||||
// Bytes returns DeviceDescriptor data
|
||||
func (d DeviceDescriptor) Bytes() []byte {
|
||||
buf := bytes.NewBuffer(make([]byte, 0, deviceDescriptorSize))
|
||||
binary.Write(buf, binary.LittleEndian, d.bLength)
|
||||
binary.Write(buf, binary.LittleEndian, d.bDescriptorType)
|
||||
binary.Write(buf, binary.LittleEndian, d.bcdUSB)
|
||||
binary.Write(buf, binary.LittleEndian, d.bDeviceClass)
|
||||
binary.Write(buf, binary.LittleEndian, d.bDeviceSubClass)
|
||||
binary.Write(buf, binary.LittleEndian, d.bDeviceProtocol)
|
||||
binary.Write(buf, binary.LittleEndian, d.bMaxPacketSize0)
|
||||
binary.Write(buf, binary.LittleEndian, d.idVendor)
|
||||
binary.Write(buf, binary.LittleEndian, d.idProduct)
|
||||
binary.Write(buf, binary.LittleEndian, d.bcdDevice)
|
||||
binary.Write(buf, binary.LittleEndian, d.iManufacturer)
|
||||
binary.Write(buf, binary.LittleEndian, d.iProduct)
|
||||
binary.Write(buf, binary.LittleEndian, d.iSerialNumber)
|
||||
binary.Write(buf, binary.LittleEndian, d.bNumConfigurations)
|
||||
return buf.Bytes()
|
||||
}
|
||||
|
||||
const configDescriptorSize = 9
|
||||
|
||||
// ConfigDescriptor implements the standard USB configuration descriptor.
|
||||
//
|
||||
// Table 9-10. Standard Configuration Descriptor
|
||||
// bLength, bDescriptorType, wTotalLength, bNumInterfaces, bConfigurationValue, iConfiguration
|
||||
// bmAttributes, bMaxPower
|
||||
//
|
||||
type ConfigDescriptor struct {
|
||||
bLength uint8 // 9
|
||||
bDescriptorType uint8 // 2
|
||||
wTotalLength uint16 // total length
|
||||
bNumInterfaces uint8
|
||||
bConfigurationValue uint8
|
||||
iConfiguration uint8
|
||||
bmAttributes uint8
|
||||
bMaxPower uint8
|
||||
}
|
||||
|
||||
// NewConfigDescriptor returns a new USB ConfigDescriptor.
|
||||
func NewConfigDescriptor(totalLength uint16, interfaces uint8) ConfigDescriptor {
|
||||
return ConfigDescriptor{configDescriptorSize, 2, totalLength, interfaces, 1, 0, usb_CONFIG_BUS_POWERED | usb_CONFIG_REMOTE_WAKEUP, 50}
|
||||
}
|
||||
|
||||
// Bytes returns ConfigDescriptor data.
|
||||
func (d ConfigDescriptor) Bytes() []byte {
|
||||
buf := bytes.NewBuffer(make([]byte, 0, configDescriptorSize))
|
||||
binary.Write(buf, binary.LittleEndian, d.bLength)
|
||||
binary.Write(buf, binary.LittleEndian, d.bDescriptorType)
|
||||
binary.Write(buf, binary.LittleEndian, d.wTotalLength)
|
||||
binary.Write(buf, binary.LittleEndian, d.bNumInterfaces)
|
||||
binary.Write(buf, binary.LittleEndian, d.bConfigurationValue)
|
||||
binary.Write(buf, binary.LittleEndian, d.iConfiguration)
|
||||
binary.Write(buf, binary.LittleEndian, d.bmAttributes)
|
||||
binary.Write(buf, binary.LittleEndian, d.bMaxPower)
|
||||
return buf.Bytes()
|
||||
}
|
||||
|
||||
const interfaceDescriptorSize = 9
|
||||
|
||||
// InterfaceDescriptor implements the standard USB interface descriptor.
|
||||
//
|
||||
// Table 9-12. Standard Interface Descriptor
|
||||
// bLength, bDescriptorType, bInterfaceNumber, bAlternateSetting, bNumEndpoints, bInterfaceClass,
|
||||
// bInterfaceSubClass, bInterfaceProtocol, iInterface
|
||||
//
|
||||
type InterfaceDescriptor struct {
|
||||
bLength uint8 // 9
|
||||
bDescriptorType uint8 // 4
|
||||
bInterfaceNumber uint8
|
||||
bAlternateSetting uint8
|
||||
bNumEndpoints uint8
|
||||
bInterfaceClass uint8
|
||||
bInterfaceSubClass uint8
|
||||
bInterfaceProtocol uint8
|
||||
iInterface uint8
|
||||
}
|
||||
|
||||
// NewInterfaceDescriptor returns a new USB InterfaceDescriptor.
|
||||
func NewInterfaceDescriptor(n, numEndpoints, class, subClass, protocol uint8) InterfaceDescriptor {
|
||||
return InterfaceDescriptor{interfaceDescriptorSize, 4, n, 0, numEndpoints, class, subClass, protocol, 0}
|
||||
}
|
||||
|
||||
// Bytes returns InterfaceDescriptor data.
|
||||
func (d InterfaceDescriptor) Bytes() []byte {
|
||||
buf := bytes.NewBuffer(make([]byte, 0, interfaceDescriptorSize))
|
||||
binary.Write(buf, binary.LittleEndian, d.bLength)
|
||||
binary.Write(buf, binary.LittleEndian, d.bDescriptorType)
|
||||
binary.Write(buf, binary.LittleEndian, d.bInterfaceNumber)
|
||||
binary.Write(buf, binary.LittleEndian, d.bAlternateSetting)
|
||||
binary.Write(buf, binary.LittleEndian, d.bNumEndpoints)
|
||||
binary.Write(buf, binary.LittleEndian, d.bInterfaceClass)
|
||||
binary.Write(buf, binary.LittleEndian, d.bInterfaceSubClass)
|
||||
binary.Write(buf, binary.LittleEndian, d.bInterfaceProtocol)
|
||||
binary.Write(buf, binary.LittleEndian, d.iInterface)
|
||||
return buf.Bytes()
|
||||
}
|
||||
|
||||
const endpointDescriptorSize = 7
|
||||
|
||||
// EndpointDescriptor implements the standard USB endpoint descriptor.
|
||||
//
|
||||
// Table 9-13. Standard Endpoint Descriptor
|
||||
// bLength, bDescriptorType, bEndpointAddress, bmAttributes, wMaxPacketSize, bInterval
|
||||
//
|
||||
type EndpointDescriptor struct {
|
||||
bLength uint8 // 7
|
||||
bDescriptorType uint8 // 5
|
||||
bEndpointAddress uint8
|
||||
bmAttributes uint8
|
||||
wMaxPacketSize uint16
|
||||
bInterval uint8
|
||||
}
|
||||
|
||||
// NewEndpointDescriptor returns a new USB EndpointDescriptor.
|
||||
func NewEndpointDescriptor(addr, attr uint8, packetSize uint16, interval uint8) EndpointDescriptor {
|
||||
return EndpointDescriptor{endpointDescriptorSize, 5, addr, attr, packetSize, interval}
|
||||
}
|
||||
|
||||
// Bytes returns EndpointDescriptor data.
|
||||
func (d EndpointDescriptor) Bytes() []byte {
|
||||
buf := bytes.NewBuffer(make([]byte, 0, endpointDescriptorSize))
|
||||
binary.Write(buf, binary.LittleEndian, d.bLength)
|
||||
binary.Write(buf, binary.LittleEndian, d.bDescriptorType)
|
||||
binary.Write(buf, binary.LittleEndian, d.bEndpointAddress)
|
||||
binary.Write(buf, binary.LittleEndian, d.bmAttributes)
|
||||
binary.Write(buf, binary.LittleEndian, d.wMaxPacketSize)
|
||||
binary.Write(buf, binary.LittleEndian, d.bInterval)
|
||||
return buf.Bytes()
|
||||
}
|
||||
|
||||
const iadDescriptorSize = 8
|
||||
|
||||
// IADDescriptor is an Interface Association Descriptor, which is used
|
||||
// to bind 2 interfaces together in CDC composite device.
|
||||
//
|
||||
// Standard Interface Association Descriptor:
|
||||
// bLength, bDescriptorType, bFirstInterface, bInterfaceCount, bFunctionClass, bFunctionSubClass,
|
||||
// bFunctionProtocol, iFunction
|
||||
//
|
||||
type IADDescriptor struct {
|
||||
bLength uint8 // 8
|
||||
bDescriptorType uint8 // 11
|
||||
bFirstInterface uint8
|
||||
bInterfaceCount uint8
|
||||
bFunctionClass uint8
|
||||
bFunctionSubClass uint8
|
||||
bFunctionProtocol uint8
|
||||
iFunction uint8
|
||||
}
|
||||
|
||||
// NewIADDescriptor returns a new USB IADDescriptor.
|
||||
func NewIADDescriptor(firstInterface, count, class, subClass, protocol uint8) IADDescriptor {
|
||||
return IADDescriptor{iadDescriptorSize, 11, firstInterface, count, class, subClass, protocol, 0}
|
||||
}
|
||||
|
||||
// Bytes returns IADDescriptor data.
|
||||
func (d IADDescriptor) Bytes() []byte {
|
||||
buf := bytes.NewBuffer(make([]byte, 0, iadDescriptorSize))
|
||||
binary.Write(buf, binary.LittleEndian, d.bLength)
|
||||
binary.Write(buf, binary.LittleEndian, d.bDescriptorType)
|
||||
binary.Write(buf, binary.LittleEndian, d.bFirstInterface)
|
||||
binary.Write(buf, binary.LittleEndian, d.bInterfaceCount)
|
||||
binary.Write(buf, binary.LittleEndian, d.bFunctionClass)
|
||||
binary.Write(buf, binary.LittleEndian, d.bFunctionSubClass)
|
||||
binary.Write(buf, binary.LittleEndian, d.bFunctionProtocol)
|
||||
binary.Write(buf, binary.LittleEndian, d.iFunction)
|
||||
return buf.Bytes()
|
||||
}
|
||||
|
||||
const cdcCSInterfaceDescriptorSize = 5
|
||||
|
||||
// CDCCSInterfaceDescriptor is a CDC CS interface descriptor.
|
||||
type CDCCSInterfaceDescriptor struct {
|
||||
len uint8 // 5
|
||||
dtype uint8 // 0x24
|
||||
subtype uint8
|
||||
d0 uint8
|
||||
d1 uint8
|
||||
}
|
||||
|
||||
// NewCDCCSInterfaceDescriptor returns a new USB CDCCSInterfaceDescriptor.
|
||||
func NewCDCCSInterfaceDescriptor(subtype, d0, d1 uint8) CDCCSInterfaceDescriptor {
|
||||
return CDCCSInterfaceDescriptor{cdcCSInterfaceDescriptorSize, 0x24, subtype, d0, d1}
|
||||
}
|
||||
|
||||
// Bytes returns CDCCSInterfaceDescriptor data.
|
||||
func (d CDCCSInterfaceDescriptor) Bytes() []byte {
|
||||
buf := bytes.NewBuffer(make([]byte, 0, cdcCSInterfaceDescriptorSize))
|
||||
binary.Write(buf, binary.LittleEndian, d.len)
|
||||
binary.Write(buf, binary.LittleEndian, d.dtype)
|
||||
binary.Write(buf, binary.LittleEndian, d.subtype)
|
||||
binary.Write(buf, binary.LittleEndian, d.d0)
|
||||
binary.Write(buf, binary.LittleEndian, d.d1)
|
||||
return buf.Bytes()
|
||||
}
|
||||
|
||||
const cmFunctionalDescriptorSize = 5
|
||||
|
||||
// CMFunctionalDescriptor is the functional descriptor general format.
|
||||
type CMFunctionalDescriptor struct {
|
||||
bFunctionLength uint8
|
||||
bDescriptorType uint8 // 0x24
|
||||
bDescriptorSubtype uint8 // 1
|
||||
bmCapabilities uint8
|
||||
bDataInterface uint8
|
||||
}
|
||||
|
||||
// NewCMFunctionalDescriptor returns a new USB CMFunctionalDescriptor.
|
||||
func NewCMFunctionalDescriptor(subtype, d0, d1 uint8) CMFunctionalDescriptor {
|
||||
return CMFunctionalDescriptor{5, 0x24, subtype, d0, d1}
|
||||
}
|
||||
|
||||
// Bytes returns the CMFunctionalDescriptor data.
|
||||
func (d CMFunctionalDescriptor) Bytes() []byte {
|
||||
buf := bytes.NewBuffer(make([]byte, 0, cmFunctionalDescriptorSize))
|
||||
binary.Write(buf, binary.LittleEndian, d.bFunctionLength)
|
||||
binary.Write(buf, binary.LittleEndian, d.bDescriptorType)
|
||||
binary.Write(buf, binary.LittleEndian, d.bDescriptorSubtype)
|
||||
binary.Write(buf, binary.LittleEndian, d.bmCapabilities)
|
||||
binary.Write(buf, binary.LittleEndian, d.bDataInterface)
|
||||
return buf.Bytes()
|
||||
}
|
||||
|
||||
const acmFunctionalDescriptorSize = 4
|
||||
|
||||
// ACMFunctionalDescriptor is a Abstract Control Model (ACM) USB descriptor.
|
||||
type ACMFunctionalDescriptor struct {
|
||||
len uint8
|
||||
dtype uint8 // 0x24
|
||||
subtype uint8 // 1
|
||||
bmCapabilities uint8
|
||||
}
|
||||
|
||||
// NewACMFunctionalDescriptor returns a new USB ACMFunctionalDescriptor.
|
||||
func NewACMFunctionalDescriptor(subtype, d0 uint8) ACMFunctionalDescriptor {
|
||||
return ACMFunctionalDescriptor{4, 0x24, subtype, d0}
|
||||
}
|
||||
|
||||
// Bytes returns the ACMFunctionalDescriptor data.
|
||||
func (d ACMFunctionalDescriptor) Bytes() []byte {
|
||||
buf := bytes.NewBuffer(make([]byte, 0, acmFunctionalDescriptorSize))
|
||||
binary.Write(buf, binary.LittleEndian, d.len)
|
||||
binary.Write(buf, binary.LittleEndian, d.dtype)
|
||||
binary.Write(buf, binary.LittleEndian, d.subtype)
|
||||
binary.Write(buf, binary.LittleEndian, d.bmCapabilities)
|
||||
return buf.Bytes()
|
||||
}
|
||||
|
||||
// CDCDescriptor is the Communication Device Class (CDC) descriptor.
|
||||
type CDCDescriptor struct {
|
||||
// IAD
|
||||
iad IADDescriptor // Only needed on compound device
|
||||
|
||||
// Control
|
||||
cif InterfaceDescriptor
|
||||
header CDCCSInterfaceDescriptor
|
||||
|
||||
// CDC control
|
||||
controlManagement ACMFunctionalDescriptor // ACM
|
||||
functionalDescriptor CDCCSInterfaceDescriptor // CDC_UNION
|
||||
callManagement CMFunctionalDescriptor // Call Management
|
||||
cifin EndpointDescriptor
|
||||
|
||||
// CDC Data
|
||||
dif InterfaceDescriptor
|
||||
in EndpointDescriptor
|
||||
out EndpointDescriptor
|
||||
}
|
||||
|
||||
func NewCDCDescriptor(i IADDescriptor, c InterfaceDescriptor,
|
||||
h CDCCSInterfaceDescriptor,
|
||||
cm ACMFunctionalDescriptor,
|
||||
fd CDCCSInterfaceDescriptor,
|
||||
callm CMFunctionalDescriptor,
|
||||
ci EndpointDescriptor,
|
||||
di InterfaceDescriptor,
|
||||
inp EndpointDescriptor,
|
||||
outp EndpointDescriptor) CDCDescriptor {
|
||||
return CDCDescriptor{iad: i,
|
||||
cif: c,
|
||||
header: h,
|
||||
controlManagement: cm,
|
||||
functionalDescriptor: fd,
|
||||
callManagement: callm,
|
||||
cifin: ci,
|
||||
dif: di,
|
||||
in: inp,
|
||||
out: outp}
|
||||
}
|
||||
|
||||
const cdcSize = iadDescriptorSize +
|
||||
interfaceDescriptorSize +
|
||||
cdcCSInterfaceDescriptorSize +
|
||||
acmFunctionalDescriptorSize +
|
||||
cdcCSInterfaceDescriptorSize +
|
||||
cmFunctionalDescriptorSize +
|
||||
endpointDescriptorSize +
|
||||
interfaceDescriptorSize +
|
||||
endpointDescriptorSize +
|
||||
endpointDescriptorSize
|
||||
|
||||
// Bytes returns CDCDescriptor data.
|
||||
func (d CDCDescriptor) Bytes() []byte {
|
||||
buf := bytes.NewBuffer(make([]byte, 0, cdcSize))
|
||||
buf.Write(d.iad.Bytes())
|
||||
buf.Write(d.cif.Bytes())
|
||||
buf.Write(d.header.Bytes())
|
||||
buf.Write(d.controlManagement.Bytes())
|
||||
buf.Write(d.functionalDescriptor.Bytes())
|
||||
buf.Write(d.callManagement.Bytes())
|
||||
buf.Write(d.cifin.Bytes())
|
||||
buf.Write(d.dif.Bytes())
|
||||
buf.Write(d.in.Bytes())
|
||||
buf.Write(d.out.Bytes())
|
||||
return buf.Bytes()
|
||||
}
|
||||
|
||||
// MSCDescriptor is not used yet.
|
||||
type MSCDescriptor struct {
|
||||
msc InterfaceDescriptor
|
||||
in EndpointDescriptor
|
||||
out EndpointDescriptor
|
||||
}
|
||||
|
||||
type cdcLineInfo struct {
|
||||
dwDTERate uint32
|
||||
bCharFormat uint8
|
||||
bParityType uint8
|
||||
bDataBits uint8
|
||||
lineState uint8
|
||||
}
|
||||
|
||||
var (
|
||||
// TODO: allow setting these
|
||||
usb_STRING_LANGUAGE = [2]uint16{(3 << 8) | (2 + 2), 0x0409} // English
|
||||
usb_STRING_PRODUCT = "Arduino Zero"
|
||||
usb_STRING_MANUFACTURER = "Arduino"
|
||||
|
||||
usb_VID uint16 = 0x2341
|
||||
usb_PID uint16 = 0x004d
|
||||
)
|
||||
|
||||
const (
|
||||
usb_IMANUFACTURER = 1
|
||||
usb_IPRODUCT = 2
|
||||
usb_ISERIAL = 3
|
||||
|
||||
usb_ENDPOINT_TYPE_CONTROL = 0x00
|
||||
usb_ENDPOINT_TYPE_ISOCHRONOUS = 0x01
|
||||
usb_ENDPOINT_TYPE_BULK = 0x02
|
||||
usb_ENDPOINT_TYPE_INTERRUPT = 0x03
|
||||
|
||||
usb_DEVICE_DESCRIPTOR_TYPE = 1
|
||||
usb_CONFIGURATION_DESCRIPTOR_TYPE = 2
|
||||
usb_STRING_DESCRIPTOR_TYPE = 3
|
||||
usb_INTERFACE_DESCRIPTOR_TYPE = 4
|
||||
usb_ENDPOINT_DESCRIPTOR_TYPE = 5
|
||||
usb_DEVICE_QUALIFIER = 6
|
||||
usb_OTHER_SPEED_CONFIGURATION = 7
|
||||
|
||||
usbEndpointOut = 0x00
|
||||
usbEndpointIn = 0x80
|
||||
|
||||
usbEndpointPacketSize = 64 // 64 for Full Speed, EPT size max is 1024
|
||||
usb_EPT_NUM = 7
|
||||
|
||||
// standard requests
|
||||
usb_GET_STATUS = 0
|
||||
usb_CLEAR_FEATURE = 1
|
||||
usb_SET_FEATURE = 3
|
||||
usb_SET_ADDRESS = 5
|
||||
usb_GET_DESCRIPTOR = 6
|
||||
usb_SET_DESCRIPTOR = 7
|
||||
usb_GET_CONFIGURATION = 8
|
||||
usb_SET_CONFIGURATION = 9
|
||||
usb_GET_INTERFACE = 10
|
||||
usb_SET_INTERFACE = 11
|
||||
|
||||
usb_DEVICE_CLASS_COMMUNICATIONS = 0x02
|
||||
usb_DEVICE_CLASS_HUMAN_INTERFACE = 0x03
|
||||
usb_DEVICE_CLASS_STORAGE = 0x08
|
||||
usb_DEVICE_CLASS_VENDOR_SPECIFIC = 0xFF
|
||||
|
||||
usb_CONFIG_POWERED_MASK = 0x40
|
||||
usb_CONFIG_BUS_POWERED = 0x80
|
||||
usb_CONFIG_SELF_POWERED = 0xC0
|
||||
usb_CONFIG_REMOTE_WAKEUP = 0x20
|
||||
|
||||
// CDC
|
||||
usb_CDC_ACM_INTERFACE = 0 // CDC ACM
|
||||
usb_CDC_DATA_INTERFACE = 1 // CDC Data
|
||||
usb_CDC_FIRST_ENDPOINT = 1
|
||||
usb_CDC_ENDPOINT_ACM = 1
|
||||
usb_CDC_ENDPOINT_OUT = 2
|
||||
usb_CDC_ENDPOINT_IN = 3
|
||||
|
||||
// bmRequestType
|
||||
usb_REQUEST_HOSTTODEVICE = 0x00
|
||||
usb_REQUEST_DEVICETOHOST = 0x80
|
||||
usb_REQUEST_DIRECTION = 0x80
|
||||
|
||||
usb_REQUEST_STANDARD = 0x00
|
||||
usb_REQUEST_CLASS = 0x20
|
||||
usb_REQUEST_VENDOR = 0x40
|
||||
usb_REQUEST_TYPE = 0x60
|
||||
|
||||
usb_REQUEST_DEVICE = 0x00
|
||||
usb_REQUEST_INTERFACE = 0x01
|
||||
usb_REQUEST_ENDPOINT = 0x02
|
||||
usb_REQUEST_OTHER = 0x03
|
||||
usb_REQUEST_RECIPIENT = 0x1F
|
||||
|
||||
usb_REQUEST_DEVICETOHOST_CLASS_INTERFACE = (usb_REQUEST_DEVICETOHOST | usb_REQUEST_CLASS | usb_REQUEST_INTERFACE)
|
||||
usb_REQUEST_HOSTTODEVICE_CLASS_INTERFACE = (usb_REQUEST_HOSTTODEVICE | usb_REQUEST_CLASS | usb_REQUEST_INTERFACE)
|
||||
usb_REQUEST_DEVICETOHOST_STANDARD_INTERFACE = (usb_REQUEST_DEVICETOHOST | usb_REQUEST_STANDARD | usb_REQUEST_INTERFACE)
|
||||
|
||||
// CDC Class requests
|
||||
usb_CDC_SET_LINE_CODING = 0x20
|
||||
usb_CDC_GET_LINE_CODING = 0x21
|
||||
usb_CDC_SET_CONTROL_LINE_STATE = 0x22
|
||||
usb_CDC_SEND_BREAK = 0x23
|
||||
|
||||
usb_CDC_V1_10 = 0x0110
|
||||
usb_CDC_COMMUNICATION_INTERFACE_CLASS = 0x02
|
||||
|
||||
usb_CDC_CALL_MANAGEMENT = 0x01
|
||||
usb_CDC_ABSTRACT_CONTROL_MODEL = 0x02
|
||||
usb_CDC_HEADER = 0x00
|
||||
usb_CDC_ABSTRACT_CONTROL_MANAGEMENT = 0x02
|
||||
usb_CDC_UNION = 0x06
|
||||
usb_CDC_CS_INTERFACE = 0x24
|
||||
usb_CDC_CS_ENDPOINT = 0x25
|
||||
usb_CDC_DATA_INTERFACE_CLASS = 0x0A
|
||||
)
|
||||
|
||||
// usbDeviceDescBank is the USB device endpoint descriptor.
|
||||
// typedef struct {
|
||||
// __IO USB_DEVICE_ADDR_Type ADDR; /**< \brief Offset: 0x000 (R/W 32) DEVICE_DESC_BANK Endpoint Bank, Adress of Data Buffer */
|
||||
// __IO USB_DEVICE_PCKSIZE_Type PCKSIZE; /**< \brief Offset: 0x004 (R/W 32) DEVICE_DESC_BANK Endpoint Bank, Packet Size */
|
||||
// __IO USB_DEVICE_EXTREG_Type EXTREG; /**< \brief Offset: 0x008 (R/W 16) DEVICE_DESC_BANK Endpoint Bank, Extended */
|
||||
// __IO USB_DEVICE_STATUS_BK_Type STATUS_BK; /**< \brief Offset: 0x00A (R/W 8) DEVICE_DESC_BANK Enpoint Bank, Status of Bank */
|
||||
// RoReg8 Reserved1[0x5];
|
||||
// } UsbDeviceDescBank;
|
||||
type usbDeviceDescBank struct {
|
||||
ADDR sam.RegValue
|
||||
PCKSIZE sam.RegValue
|
||||
EXTREG sam.RegValue16
|
||||
STATUS_BK sam.RegValue8
|
||||
_reserved [5]sam.RegValue8
|
||||
}
|
||||
|
||||
type usbDeviceDescriptor struct {
|
||||
DeviceDescBank [2]usbDeviceDescBank
|
||||
}
|
||||
|
||||
// typedef struct {
|
||||
// union {
|
||||
// uint8_t bmRequestType;
|
||||
// struct {
|
||||
// uint8_t direction : 5;
|
||||
// uint8_t type : 2;
|
||||
// uint8_t transferDirection : 1;
|
||||
// };
|
||||
// };
|
||||
// uint8_t bRequest;
|
||||
// uint8_t wValueL;
|
||||
// uint8_t wValueH;
|
||||
// uint16_t wIndex;
|
||||
// uint16_t wLength;
|
||||
// } USBSetup;
|
||||
type usbSetup struct {
|
||||
bmRequestType uint8
|
||||
bRequest uint8
|
||||
wValueL uint8
|
||||
wValueH uint8
|
||||
wIndex uint16
|
||||
wLength uint16
|
||||
}
|
||||
|
||||
func newUSBSetup(data []byte) usbSetup {
|
||||
buf := bytes.NewBuffer(data)
|
||||
u := usbSetup{}
|
||||
binary.Read(buf, binary.LittleEndian, &(u.bmRequestType))
|
||||
binary.Read(buf, binary.LittleEndian, &(u.bRequest))
|
||||
binary.Read(buf, binary.LittleEndian, &(u.wValueL))
|
||||
binary.Read(buf, binary.LittleEndian, &(u.wValueH))
|
||||
binary.Read(buf, binary.LittleEndian, &(u.wIndex))
|
||||
binary.Read(buf, binary.LittleEndian, &(u.wLength))
|
||||
return u
|
||||
}
|
||||
|
||||
// USBCDC is the serial interface that works over the USB port.
|
||||
// To implement the USBCDC interface for a board, you must declare a concrete type as follows:
|
||||
//
|
||||
// type USBCDC struct {
|
||||
// Buffer *RingBuffer
|
||||
// }
|
||||
//
|
||||
// You can also add additional members to this struct depending on your implementation,
|
||||
// but the *RingBuffer is required.
|
||||
// When you are declaring the USBCDC for your board, make sure that you also declare the
|
||||
// RingBuffer using the NewRingBuffer() function:
|
||||
//
|
||||
// USBCDC{Buffer: NewRingBuffer()}
|
||||
//
|
||||
|
||||
// Read from the RX buffer.
|
||||
func (usbcdc USBCDC) Read(data []byte) (n int, err error) {
|
||||
// check if RX buffer is empty
|
||||
size := usbcdc.Buffered()
|
||||
if size == 0 {
|
||||
return 0, nil
|
||||
}
|
||||
|
||||
// Make sure we do not read more from buffer than the data slice can hold.
|
||||
if len(data) < size {
|
||||
size = len(data)
|
||||
}
|
||||
|
||||
// only read number of bytes used from buffer
|
||||
for i := 0; i < size; i++ {
|
||||
v, _ := usbcdc.ReadByte()
|
||||
data[i] = v
|
||||
}
|
||||
|
||||
return size, nil
|
||||
}
|
||||
|
||||
// Write data to the USBCDC.
|
||||
func (usbcdc USBCDC) Write(data []byte) (n int, err error) {
|
||||
for _, v := range data {
|
||||
usbcdc.WriteByte(v)
|
||||
}
|
||||
return len(data), nil
|
||||
}
|
||||
|
||||
// ReadByte reads a single byte from the RX buffer.
|
||||
// If there is no data in the buffer, returns an error.
|
||||
func (usbcdc USBCDC) ReadByte() (byte, error) {
|
||||
// check if RX buffer is empty
|
||||
buf, ok := usbcdc.Buffer.Get()
|
||||
if !ok {
|
||||
return 0, errors.New("Buffer empty")
|
||||
}
|
||||
return buf, nil
|
||||
}
|
||||
|
||||
// Buffered returns the number of bytes currently stored in the RX buffer.
|
||||
func (usbcdc USBCDC) Buffered() int {
|
||||
return int(usbcdc.Buffer.Used())
|
||||
}
|
||||
|
||||
// Receive handles adding data to the UART's data buffer.
|
||||
// Usually called by the IRQ handler for a machine.
|
||||
func (usbcdc USBCDC) Receive(data byte) {
|
||||
usbcdc.Buffer.Put(data)
|
||||
}
|
||||
|
|
@ -24,8 +24,9 @@ func init() {
|
|||
initRTC()
|
||||
initUARTClock()
|
||||
initI2CClock()
|
||||
initUSBClock()
|
||||
|
||||
// connect to UART
|
||||
// connect to USB CDC interface
|
||||
machine.UART0.Configure(machine.UARTConfig{})
|
||||
}
|
||||
|
||||
|
|
@ -331,3 +332,14 @@ func initI2CClock() {
|
|||
sam.GCLK_CLKCTRL_CLKEN)
|
||||
waitForSync()
|
||||
}
|
||||
|
||||
func initUSBClock() {
|
||||
// Turn on clock for USB
|
||||
sam.PM.APBBMASK |= sam.PM_APBBMASK_USB_
|
||||
|
||||
// Put Generic Clock Generator 0 as source for Generic Clock Multiplexer 6 (USB reference)
|
||||
sam.GCLK.CLKCTRL = sam.RegValue16((sam.GCLK_CLKCTRL_ID_USB << sam.GCLK_CLKCTRL_ID_Pos) |
|
||||
(sam.GCLK_CLKCTRL_GEN_GCLK0 << sam.GCLK_CLKCTRL_GEN_Pos) |
|
||||
sam.GCLK_CLKCTRL_CLKEN)
|
||||
waitForSync()
|
||||
}
|
||||
|
|
|
|||
Загрузка…
Создание таблицы
Сослаться в новой задаче