rp2040: make all RP2040 boards available for simulation

This makes all rp2040 boards available for simulation using
-tags=<board_name>. Importantly, this includes the Gopher Badge which
I'm working on to add to the TinyGo Playground.

GNUmakefile

@@ -525,6 +525,8 @@ ifneq ($(WASM), 0)
  @$(MD5SUM) test.wasm
  $(TINYGO) build -size short -o test.wasm -tags=mch2022 examples/serial
  @$(MD5SUM) test.wasm
+ $(TINYGO) build -size short -o test.wasm -tags=gopher_badge examples/blinky1
+ @$(MD5SUM) test.wasm
 endif
  # test all targets/boards
  $(TINYGO) build -size short -o test.hex -target=pca10040-s132v6 examples/blinky1

src/machine/machine_generic.go

@@ -7,15 +7,14 @@ package machine
 const deviceName = "generic"
 
 var (
- UART0 = &UART{0}
- USB = &UART{100}
+ USB = &UART{100}
 )
 
 // The Serial port always points to the default UART in a simulated environment.
 //
 // TODO: perhaps this should be a special serial object that outputs via WASI
 // stdout calls.
-var Serial = UART0
+var Serial = hardwareUART0
 
 const (
  PinInput PinMode = iota
@@ -176,6 +175,11 @@ func uartRead(bus uint8, buf *byte, bufLen int) int
 //export __tinygo_uart_write
 func uartWrite(bus uint8, buf *byte, bufLen int) int
 
+var (
+ hardwareUART0 = &UART{0}
+ hardwareUART1 = &UART{1}
+)
+
 // Some objects used by Atmel SAM D chips (samd21, samd51).
 // Defined here (without build tag) for convenience.
 var (

src/machine/machine_generic_peripherals.go

@@ -6,6 +6,9 @@ package machine
 // boards that define their peripherals in the board file (e.g. board_qtpy.go).
 
 var (
- SPI0 = SPI{0}
- I2C0 = &I2C{0}
+ UART0 = hardwareUART0
+ UART1 = hardwareUART1
+ SPI0 = SPI{0}
+ SPI1 = SPI{1}
+ I2C0 = &I2C{0}
 )

src/machine/machine_rp2040.go

@@ -10,46 +10,6 @@ import (
 
 const deviceName = rp.Device
 
-const (
- // GPIO pins
- GPIO0 Pin = 0 // peripherals: PWM0 channel A
- GPIO1 Pin = 1 // peripherals: PWM0 channel B
- GPIO2 Pin = 2 // peripherals: PWM1 channel A
- GPIO3 Pin = 3 // peripherals: PWM1 channel B
- GPIO4 Pin = 4 // peripherals: PWM2 channel A
- GPIO5 Pin = 5 // peripherals: PWM2 channel B
- GPIO6 Pin = 6 // peripherals: PWM3 channel A
- GPIO7 Pin = 7 // peripherals: PWM3 channel B
- GPIO8 Pin = 8 // peripherals: PWM4 channel A
- GPIO9 Pin = 9 // peripherals: PWM4 channel B
- GPIO10 Pin = 10 // peripherals: PWM5 channel A
- GPIO11 Pin = 11 // peripherals: PWM5 channel B
- GPIO12 Pin = 12 // peripherals: PWM6 channel A
- GPIO13 Pin = 13 // peripherals: PWM6 channel B
- GPIO14 Pin = 14 // peripherals: PWM7 channel A
- GPIO15 Pin = 15 // peripherals: PWM7 channel B
- GPIO16 Pin = 16 // peripherals: PWM0 channel A
- GPIO17 Pin = 17 // peripherals: PWM0 channel B
- GPIO18 Pin = 18 // peripherals: PWM1 channel A
- GPIO19 Pin = 19 // peripherals: PWM1 channel B
- GPIO20 Pin = 20 // peripherals: PWM2 channel A
- GPIO21 Pin = 21 // peripherals: PWM2 channel B
- GPIO22 Pin = 22 // peripherals: PWM3 channel A
- GPIO23 Pin = 23 // peripherals: PWM3 channel B
- GPIO24 Pin = 24 // peripherals: PWM4 channel A
- GPIO25 Pin = 25 // peripherals: PWM4 channel B
- GPIO26 Pin = 26 // peripherals: PWM5 channel A
- GPIO27 Pin = 27 // peripherals: PWM5 channel B
- GPIO28 Pin = 28 // peripherals: PWM6 channel A
- GPIO29 Pin = 29 // peripherals: PWM6 channel B
-
- // Analog pins
- ADC0 Pin = GPIO26
- ADC1 Pin = GPIO27
- ADC2 Pin = GPIO28
- ADC3 Pin = GPIO29
-)
-
 //go:linkname machineInit runtime.machineInit
 func machineInit() {
  // Reset all peripherals to put system into a known state,

src/machine/machine_rp2040_pins.go

@@ -0,0 +1,43 @@
+//go:build rp2040 || ae_rp2040 || badger2040 || challenger_rp2040 || feather_rp2040 || gopher_badge || kb2040 || macropad_rp2040 || nano_rp2040 || pico || qtpy_rp2040 || thingplus_rp2040 || thumby || tufty2040 || waveshare_rp2040_zero || xiao_rp2040
+
+package machine
+
+const (
+ // GPIO pins
+ GPIO0 Pin = 0 // peripherals: PWM0 channel A
+ GPIO1 Pin = 1 // peripherals: PWM0 channel B
+ GPIO2 Pin = 2 // peripherals: PWM1 channel A
+ GPIO3 Pin = 3 // peripherals: PWM1 channel B
+ GPIO4 Pin = 4 // peripherals: PWM2 channel A
+ GPIO5 Pin = 5 // peripherals: PWM2 channel B
+ GPIO6 Pin = 6 // peripherals: PWM3 channel A
+ GPIO7 Pin = 7 // peripherals: PWM3 channel B
+ GPIO8 Pin = 8 // peripherals: PWM4 channel A
+ GPIO9 Pin = 9 // peripherals: PWM4 channel B
+ GPIO10 Pin = 10 // peripherals: PWM5 channel A
+ GPIO11 Pin = 11 // peripherals: PWM5 channel B
+ GPIO12 Pin = 12 // peripherals: PWM6 channel A
+ GPIO13 Pin = 13 // peripherals: PWM6 channel B
+ GPIO14 Pin = 14 // peripherals: PWM7 channel A
+ GPIO15 Pin = 15 // peripherals: PWM7 channel B
+ GPIO16 Pin = 16 // peripherals: PWM0 channel A
+ GPIO17 Pin = 17 // peripherals: PWM0 channel B
+ GPIO18 Pin = 18 // peripherals: PWM1 channel A
+ GPIO19 Pin = 19 // peripherals: PWM1 channel B
+ GPIO20 Pin = 20 // peripherals: PWM2 channel A
+ GPIO21 Pin = 21 // peripherals: PWM2 channel B
+ GPIO22 Pin = 22 // peripherals: PWM3 channel A
+ GPIO23 Pin = 23 // peripherals: PWM3 channel B
+ GPIO24 Pin = 24 // peripherals: PWM4 channel A
+ GPIO25 Pin = 25 // peripherals: PWM4 channel B
+ GPIO26 Pin = 26 // peripherals: PWM5 channel A
+ GPIO27 Pin = 27 // peripherals: PWM5 channel B
+ GPIO28 Pin = 28 // peripherals: PWM6 channel A
+ GPIO29 Pin = 29 // peripherals: PWM6 channel B
+
+ // Analog pins
+ ADC0 Pin = GPIO26
+ ADC1 Pin = GPIO27
+ ADC2 Pin = GPIO28
+ ADC3 Pin = GPIO29
+)