maixbit: add GPIOHS pin interrupt support
Этот коммит содержится в:
Yannis Huber
Ron Evans
родитель
53c83fa445
коммит
5446c6927e
2 изменённых файлов: 183 добавлений и 2 удалений
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@ -12,6 +12,8 @@ func CPUFrequency() uint32 {
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}
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type PinMode uint8
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type fpioaPullMode uint8
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type PinChange uint8
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const (
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PinInput PinMode = iota
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@ -20,14 +22,20 @@ const (
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PinOutput
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)
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type fpioaPullMode uint8
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const (
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fpioaPullNone fpioaPullMode = iota
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fpioaPullDown
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fpioaPullUp
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)
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const (
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PinRising PinChange = iota + 1
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PinFalling
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PinToggle
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PinHigh
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PinLow = 8
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)
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func (p Pin) fpioaSetIOPull(pull fpioaPullMode) {
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switch pull {
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case fpioaPullNone:
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@ -122,6 +130,174 @@ func (p Pin) Get() bool {
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return (val > 0)
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}
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// Callbacks to be called for GPIOHS pins configured with SetInterrupt.
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var pinCallbacks [32]func(Pin)
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// SetInterrupt sets an interrupt to be executed when a particular pin changes
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// state.
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//
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// You can pass a nil func to unset the pin change interrupt. If you do so,
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// the change parameter is ignored and can be set to any value (such as 0).
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// If the pin is already configured with a callback, you must first unset
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// this pins interrupt before you can set a new callback.
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func (p Pin) SetInterrupt(change PinChange, callback func(Pin)) error {
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// Check if the pin is a GPIOHS pin.
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if p < P16 && p > P47 {
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return ErrInvalidDataPin
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}
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gpioPin := uint8(p) - 16
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// Clear all interrupts.
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kendryte.GPIOHS.RISE_IE.ClearBits(1 << gpioPin)
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kendryte.GPIOHS.FALL_IE.ClearBits(1 << gpioPin)
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kendryte.GPIOHS.HIGH_IE.ClearBits(1 << gpioPin)
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kendryte.GPIOHS.LOW_IE.ClearBits(1 << gpioPin)
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// Clear all the pending bits for this pin.
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kendryte.GPIOHS.RISE_IP.SetBits(1 << gpioPin)
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kendryte.GPIOHS.FALL_IP.SetBits(1 << gpioPin)
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kendryte.GPIOHS.HIGH_IP.SetBits(1 << gpioPin)
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kendryte.GPIOHS.LOW_IP.SetBits(1 << gpioPin)
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if callback == nil {
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if pinCallbacks[gpioPin] != nil {
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pinCallbacks[gpioPin] = nil
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}
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return nil
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}
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if pinCallbacks[gpioPin] != nil {
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// The pin was already configured.
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// To properly re-configure a pin, unset it first and set a new
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// configuration.
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return ErrNoPinChangeChannel
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}
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pinCallbacks[gpioPin] = callback
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// Enable interrupts.
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if change&PinRising != 0 {
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kendryte.GPIOHS.RISE_IE.SetBits(1 << gpioPin)
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}
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if change&PinFalling != 0 {
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kendryte.GPIOHS.FALL_IE.SetBits(1 << gpioPin)
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}
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if change&PinHigh != 0 {
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kendryte.GPIOHS.HIGH_IE.SetBits(1 << gpioPin)
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}
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if change&PinLow != 0 {
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kendryte.GPIOHS.LOW_IE.SetBits(1 << gpioPin)
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}
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handleInterrupt := func(inter interrupt.Interrupt) {
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pin := uint8(inter.GetNumber() - kendryte.IRQ_GPIOHS0)
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if kendryte.GPIOHS.RISE_IE.HasBits(1 << pin) {
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kendryte.GPIOHS.RISE_IE.ClearBits(1 << pin)
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kendryte.GPIOHS.RISE_IP.SetBits(1 << pin)
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kendryte.GPIOHS.RISE_IE.SetBits(1 << pin)
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}
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if kendryte.GPIOHS.FALL_IE.HasBits(1 << pin) {
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kendryte.GPIOHS.FALL_IE.ClearBits(1 << pin)
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kendryte.GPIOHS.FALL_IP.SetBits(1 << pin)
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kendryte.GPIOHS.FALL_IE.SetBits(1 << pin)
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}
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if kendryte.GPIOHS.HIGH_IE.HasBits(1 << pin) {
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kendryte.GPIOHS.HIGH_IE.ClearBits(1 << pin)
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kendryte.GPIOHS.HIGH_IP.SetBits(1 << pin)
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kendryte.GPIOHS.HIGH_IE.SetBits(1 << pin)
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}
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if kendryte.GPIOHS.LOW_IE.HasBits(1 << pin) {
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kendryte.GPIOHS.LOW_IE.ClearBits(1 << pin)
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kendryte.GPIOHS.LOW_IP.SetBits(1 << pin)
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kendryte.GPIOHS.LOW_IE.SetBits(1 << pin)
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}
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pinCallbacks[pin](Pin(pin))
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}
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var ir interrupt.Interrupt
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switch p {
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case P16:
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ir = interrupt.New(kendryte.IRQ_GPIOHS0, handleInterrupt)
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case P17:
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ir = interrupt.New(kendryte.IRQ_GPIOHS1, handleInterrupt)
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case P18:
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ir = interrupt.New(kendryte.IRQ_GPIOHS2, handleInterrupt)
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case P19:
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ir = interrupt.New(kendryte.IRQ_GPIOHS3, handleInterrupt)
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case P20:
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ir = interrupt.New(kendryte.IRQ_GPIOHS4, handleInterrupt)
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case P21:
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ir = interrupt.New(kendryte.IRQ_GPIOHS5, handleInterrupt)
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case P22:
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ir = interrupt.New(kendryte.IRQ_GPIOHS6, handleInterrupt)
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case P23:
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ir = interrupt.New(kendryte.IRQ_GPIOHS7, handleInterrupt)
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case P24:
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ir = interrupt.New(kendryte.IRQ_GPIOHS8, handleInterrupt)
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case P25:
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ir = interrupt.New(kendryte.IRQ_GPIOHS9, handleInterrupt)
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case P26:
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ir = interrupt.New(kendryte.IRQ_GPIOHS10, handleInterrupt)
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case P27:
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ir = interrupt.New(kendryte.IRQ_GPIOHS11, handleInterrupt)
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case P28:
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ir = interrupt.New(kendryte.IRQ_GPIOHS12, handleInterrupt)
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case P29:
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ir = interrupt.New(kendryte.IRQ_GPIOHS13, handleInterrupt)
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case P30:
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ir = interrupt.New(kendryte.IRQ_GPIOHS14, handleInterrupt)
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case P31:
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ir = interrupt.New(kendryte.IRQ_GPIOHS15, handleInterrupt)
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case P32:
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ir = interrupt.New(kendryte.IRQ_GPIOHS16, handleInterrupt)
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case P33:
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ir = interrupt.New(kendryte.IRQ_GPIOHS17, handleInterrupt)
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case P34:
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ir = interrupt.New(kendryte.IRQ_GPIOHS18, handleInterrupt)
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case P35:
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ir = interrupt.New(kendryte.IRQ_GPIOHS19, handleInterrupt)
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case P36:
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ir = interrupt.New(kendryte.IRQ_GPIOHS20, handleInterrupt)
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case P37:
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ir = interrupt.New(kendryte.IRQ_GPIOHS21, handleInterrupt)
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case P38:
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ir = interrupt.New(kendryte.IRQ_GPIOHS22, handleInterrupt)
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case P39:
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ir = interrupt.New(kendryte.IRQ_GPIOHS23, handleInterrupt)
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case P40:
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ir = interrupt.New(kendryte.IRQ_GPIOHS24, handleInterrupt)
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case P41:
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ir = interrupt.New(kendryte.IRQ_GPIOHS25, handleInterrupt)
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case P42:
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ir = interrupt.New(kendryte.IRQ_GPIOHS26, handleInterrupt)
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case P43:
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ir = interrupt.New(kendryte.IRQ_GPIOHS27, handleInterrupt)
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case P44:
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ir = interrupt.New(kendryte.IRQ_GPIOHS28, handleInterrupt)
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case P45:
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ir = interrupt.New(kendryte.IRQ_GPIOHS29, handleInterrupt)
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case P46:
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ir = interrupt.New(kendryte.IRQ_GPIOHS30, handleInterrupt)
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case P47:
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ir = interrupt.New(kendryte.IRQ_GPIOHS31, handleInterrupt)
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}
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ir.SetPriority(5)
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ir.Enable()
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return nil
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}
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type UART struct {
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Bus *kendryte.UARTHS_Type
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Buffer *RingBuffer
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@ -20,3 +20,8 @@ func (irq Interrupt) Enable() {
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func (irq Interrupt) SetPriority(priority uint8) {
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kendryte.PLIC.PRIORITY[irq.num].Set(uint32(priority))
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}
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// GetNumber returns the interrupt number for this interrupt.
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func (irq Interrupt) GetNumber() int {
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return irq.num
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}
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