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8 коммитов

Автор SHA1 Сообщение Дата
Ayke van Laethem
ae864bdf0c sam: simplify I2C peripheral declarations
This commit changes the I2C declarations so that the objects are
instantiated in each chip file (e.g. machine_atsamd21e18.go) and used to
define I2C0 (and similar) in the board file (e.g. board_qtpy.go). This
should make it easier to define new board files, and reduces the need
for separate *_baremetal.go files.

I have tested this the following way:

  - With the LIS3DH driver example on the Circuit Playground Express and
    the PyBadge.
  - With the LSM6DS3 driver example on the Arduino Nano 33 IoT.

They both still work fine.
2021-10-25 14:49:02 +02:00
Ayke van Laethem
e50885a6f2 sam: simplify definition of SERCOM UART peripherals
Instead of defining them separately for each board, define them once in
the chip definition and later simply use &sercomUART1 etc. to refer to
them. This is simpler and less error-prone.

I found two bugs while working on this:

  - The P1AM-100 board mixed SERCOM 5 and SERCOM 3. It looks like SERCOM
    5 was intended, based on the used pins.
  - The Adafruit Matrix Portal appears to have configured the wrong
    interrupt.

Unfortunately, I can't test these fixes. However, they make it clear
that such a change is important to avoid bugs.

I tested this commit on the PyBadge and the Circuit Playground Express.
2021-10-25 14:49:02 +02:00
Ayke van Laethem
aa5b8d0df7 machine: make UART objects pointer receivers
This means that machine.UART0, machine.UART1, etc are of type
*machine.UART, not machine.UART. This makes them easier to pass around
and avoids surprises when they are passed around by value while they
should be passed around by reference.

There is a small code size impact in some cases, but it is relatively
minor.
2021-05-13 16:43:37 +02:00
Ayke van Laethem
90b42799a2 machine: make machine.I2C0 and similar objects pointers
This makes it possible to assign I2C objects (machine.I2C0,
machine.I2C1, etc.) without needing to take a pointer.

This is important especially in the future when I2C may be driven using
DMA and the machine.I2C type needs to store some state.
2021-03-29 02:02:04 +02:00
Ayke van Laethem
a5ed993f8d all: add compiler support for interrupts
This commit lets the compiler know about interrupts and allows
optimizations to be performed based on that: interrupts are eliminated
when they appear to be unused in a program. This is done with a new
pseudo-call (runtime/interrupt.New) that is treated specially by the
compiler.
2020-01-20 21:19:12 +01:00
Ayke van Laethem
d37bbadb54 machine/arduino-nano33: fix UART1 and UART2
UART2 was configured with the wrong SERCOM for the used pins (PB22 and
PB23). However, after changing the SERCOM from 3 to 5 that led to a
conflict with UART1 (used for the on-board WiFi). But the used pins are
also usable from SERCOM 3, so in the end I switched SERCOM5 and SERCOM3
around.

With this change, I was able to get examples/echo working.
2020-01-03 23:25:37 +01:00
Daniel Esteban
2778377ac9 Nano33 IoT: default SPI should be D13/D11/D12 instead of A2/A3/A6 (#781)
* Nano33 IoT: default SPI should be D13/D11/D12 instead of A2/A3/A6
2019-12-15 15:21:33 +01:00
Ayke van Laethem
c97b7221bd machine: support arduino-nano33 on play.tinygo.org 2019-12-11 21:49:19 +01:00