Puya PY32F MCU support

.gitignore

@@ -24,6 +24,8 @@ src/device/renesas/*.go
 src/device/renesas/*.s
 src/device/rp/*.go
 src/device/rp/*.s
+src/device/py32/*.go
+src/device/py32/*.s
 ./vendor
 llvm-build
 llvm-project

.gitmodules

@@ -41,3 +41,6 @@
 [submodule "lib/bdwgc"]
 	path = lib/bdwgc
 	url = https://github.com/ivmai/bdwgc.git
+[submodule "lib/py32-svd"]
+	path = lib/py32-svd
+	url = https://github.com/burgrp/py32-svd.git

GNUmakefile

@@ -187,7 +187,7 @@ fmt-check: ## Warn if any source needs reformatting
 	@unformatted=$$(gofmt -l $(FMT_PATHS)); [ -z "$$unformatted" ] && exit 0; echo "Unformatted:"; for fn in $$unformatted; do echo "  $$fn"; done; exit 1
 
 
-gen-device: gen-device-avr gen-device-esp gen-device-nrf gen-device-sam gen-device-sifive gen-device-kendryte gen-device-nxp gen-device-rp ## Generate microcontroller-specific sources
+gen-device: gen-device-avr gen-device-esp gen-device-nrf gen-device-sam gen-device-sifive gen-device-kendryte gen-device-nxp gen-device-rp gen-device-py32 ## Generate microcontroller-specific sources
 ifneq ($(RENESAS), 0)
 gen-device: gen-device-renesas
 endif
@@ -242,6 +242,10 @@ gen-device-renesas: build/gen-device-svd
 	./build/gen-device-svd -source=https://github.com/cmsis-svd/cmsis-svd-data/tree/master/data/Renesas lib/cmsis-svd/data/Renesas/ src/device/renesas/
 	GO111MODULE=off $(GO) fmt ./src/device/renesas
 
+gen-device-py32: build/gen-device-svd
+	./build/gen-device-svd -source=https://github.com/tinygo-org/py32-svd lib/py32-svd/svd src/device/py32/
+	GO111MODULE=off $(GO) fmt ./src/device/py32
+
 $(LLVM_PROJECTDIR)/llvm:
 	git clone -b xtensa_release_19.1.2 --depth=1 https://github.com/espressif/llvm-project $(LLVM_PROJECTDIR)
 llvm-source: $(LLVM_PROJECTDIR)/llvm ## Get LLVM sources

src/machine/board_embedfire_py32f002b.go

@@ -0,0 +1,27 @@
+//go:build embedfire_py32f002b
+
+// Pin mappings for the Embedfire PY32F002B board.
+
+package machine
+
+// LEDs
+const (
+	LED1 = PA1
+	LED2 = PA5
+	LED3 = PA4
+	LED  = LED2
+)
+
+// Buttons
+const (
+	KEY1 = PA3
+	KEY2 = PA0
+)
+
+// UART
+const (
+	DEFAULT_UART_TX_PIN    = PA6
+	DEFAULT_UART_RX_PIN    = PA7
+	DEFAULT_UART_TX_PIN_AF = 1
+	DEFAULT_UART_RX_PIN_AF = 3
+)

src/machine/board_embedfire_py32f030.go

@@ -0,0 +1,27 @@
+//go:build embedfire_py32f030
+
+// Pin mappings for the Embedfire PY32F030 board.
+
+package machine
+
+// LEDs
+const (
+	LED1 = PA2
+	LED2 = PA3
+	LED3 = PA4
+	LED  = LED2
+)
+
+// Buttons
+const (
+	KEY1 = PA5
+	KEY2 = PA6
+)
+
+// UART
+const (
+	DEFAULT_UART_TX_PIN    = PA7
+	DEFAULT_UART_RX_PIN    = PA8
+	DEFAULT_UART_TX_PIN_AF = 8
+	DEFAULT_UART_RX_PIN_AF = 8
+)

src/machine/machine_py32_pin.go

@@ -0,0 +1,220 @@
+//go:build py32
+
+package machine
+
+import (
+	"device/py32"
+	"unsafe"
+)
+
+const deviceName = py32.Device
+
+// Peripheral port offsets.
+// Keep the same spacing used on other MCUs so helpers like Pin.getPortNumber
+// can keep using simple division by 16.
+const (
+	portA Pin = iota * 16
+	portB
+	portC
+	portD
+	portE
+	portF
+)
+
+const (
+	PA0 Pin = portA + iota
+	PA1
+	PA2
+	PA3
+	PA4
+	PA5
+	PA6
+	PA7
+	PA8
+	PA9
+	PA10
+	PA11
+	PA12
+	PA13
+	PA14
+	PA15
+)
+
+const (
+	PB0 Pin = portB + iota
+	PB1
+	PB2
+	PB3
+	PB4
+	PB5
+	PB6
+	PB7
+	PB8
+	PB9
+	PB10
+	PB11
+	PB12
+	PB13
+	PB14
+	PB15
+)
+
+const (
+	PC0 Pin = portC + iota
+	PC1
+	PC2
+	PC3
+	PC4
+	PC5
+	PC6
+	PC7
+	PC8
+	PC9
+	PC10
+	PC11
+	PC12
+	PC13
+	PC14
+	PC15
+)
+
+const (
+	PD0 Pin = portD + iota
+	PD1
+	PD2
+	PD3
+	PD4
+	PD5
+	PD6
+	PD7
+	PD8
+	PD9
+	PD10
+	PD11
+	PD12
+	PD13
+	PD14
+	PD15
+)
+
+const (
+	PE0 Pin = portE + iota
+	PE1
+	PE2
+	PE3
+	PE4
+	PE5
+	PE6
+	PE7
+	PE8
+	PE9
+	PE10
+	PE11
+	PE12
+	PE13
+	PE14
+	PE15
+)
+
+const (
+	PF0 Pin = portF + iota
+	PF1
+	PF2
+	PF3
+	PF4
+	PF5
+	PF6
+	PF7
+	PF8
+	PF9
+	PF10
+	PF11
+	PF12
+	PF13
+	PF14
+	PF15
+)
+
+const (
+	PinOutput PinMode = iota
+	PinInputFloating
+	PinInputPulldown
+	PinInputPullup
+	PinInputAnalog
+)
+const PinInput PinMode = PinInputFloating
+
+const (
+	gpioModeInput  = 0
+	gpioModeOutput = 1
+	gpioModeAnalog = 3
+	gpioModeMask   = 0x3
+
+	gpioPullFloating = 0
+	gpioPullUp       = 1
+	gpioPullDown     = 2
+	gpioPullMask     = 0x3
+
+	gpioOutputSpeedHigh = 2
+	gpioOutputSpeedMask = 0x3
+)
+
+func (p Pin) getPortNumber() uint8 {
+	return uint8(p) >> 4
+
+}
+
+func (p Pin) getPinNumber() uint8 {
+	return uint8(p) & 0x0F
+}
+
+func (p Pin) getPort() (*py32.GPIO_Type, uint8) {
+	offset := uintptr(p.getPortNumber()) * (uintptr(unsafe.Pointer(py32.GPIOB)) - uintptr(unsafe.Pointer(py32.GPIOA)))
+	return (*py32.GPIO_Type)(unsafe.Pointer(uintptr(unsafe.Pointer(py32.GPIOA)) + offset)), p.getPinNumber()
+}
+
+func (p Pin) Set(high bool) {
+	port, pin := p.getPort()
+	if high {
+		port.BSRR.Set(1 << pin)
+	} else {
+		port.BSRR.Set(1 << (pin + 16))
+	}
+}
+
+func (p Pin) Get() bool {
+	port, pin := p.getPort()
+	val := port.IDR.Get() & (1 << pin)
+	return val > 0
+}
+
+func (p Pin) Configure(config PinConfig) {
+	p.enableClock()
+	port, pin := p.getPort()
+	pos := (pin % 16) * 2
+
+	switch config.Mode {
+
+	case PinInputFloating:
+		port.MODER.ReplaceBits(gpioModeInput, gpioModeMask, pos)
+		port.PUPDR.ReplaceBits(gpioPullFloating, gpioPullMask, pos)
+	case PinInputPulldown:
+		port.MODER.ReplaceBits(gpioModeInput, gpioModeMask, pos)
+		port.PUPDR.ReplaceBits(gpioPullDown, gpioPullMask, pos)
+	case PinInputPullup:
+		port.MODER.ReplaceBits(gpioModeInput, gpioModeMask, pos)
+		port.PUPDR.ReplaceBits(gpioPullUp, gpioPullMask, pos)
+	case PinOutput:
+		port.MODER.ReplaceBits(gpioModeOutput, gpioModeMask, pos)
+		port.OTYPER.ReplaceBits(py32.GPIO_OTYPER_OT0_PushPull, py32.GPIO_OTYPER_OT0_Msk, pos>>1)
+		port.OSPEEDR.ReplaceBits(gpioOutputSpeedHigh, gpioOutputSpeedMask, pos)
+	case PinInputAnalog:
+		port.MODER.ReplaceBits(gpioModeAnalog, gpioModeMask, pos)
+		port.PUPDR.ReplaceBits(gpioPullFloating, gpioPullMask, pos)
+	}
+}
+
+func (p Pin) enableClock() {
+	portNo := p.getPortNumber()
+	py32.RCC.IOPENR.SetBits(1 << portNo)
+}

src/machine/machine_py32_pin_afrh.go

@@ -0,0 +1,12 @@
+//go:build py32 && !no_gpio_afrh
+
+package machine
+
+func (p Pin) SetAltFunc(af uint8) {
+	port, pin := p.getPort()
+	if pin >= 8 {
+		port.AFRH.ReplaceBits(uint32(af), 0xF, (pin%8)*4)
+	} else {
+		port.AFRL.ReplaceBits(uint32(af), 0xF, (pin%8)*4)
+	}
+}

src/machine/machine_py32_pin_no_afrh.go

@@ -0,0 +1,8 @@
+//go:build py32 && no_gpio_afrh
+
+package machine
+
+func (p Pin) SetAltFunc(af uint8) {
+	port, pin := p.getPort()
+	port.AFRL.ReplaceBits(uint32(af), 0xF, (pin%8)*4)
+}