Adafruit PyPortal Support (#800)

* machine/PyPortal: implementation, also includes refinements for other members of samd51x familty.

1 files changed, 151 insertions, 0 deletions

diff --git a/src/machine/board_pyportal.go b/src/machine/board_pyportal.go
new file mode 100644
index 000000000..db119265c
--- /dev/null
+++ b/src/machine/board_pyportal.go
@@ -0,0 +1,151 @@
+// +build sam,atsamd51,pyportal
+
+package machine
+
+import (
+	"device/sam"
+)
+
+// used to reset into bootloader
+const RESET_MAGIC_VALUE = 0xf01669ef
+
+// GPIO Pins
+const (
+	D0  = PB13 // NINA_RX
+	D1  = PB12 // NINA_TX
+	D2  = PB22 // built-in neopixel
+	D3  = PA04 // PWM available
+	D4  = PA05 // PWM available
+	D5  = PB16 // NINA_ACK
+	D6  = PB15 // NINA_GPIO0
+	D7  = PB17 // NINA_RESETN
+	D8  = PB14 // NINA_CS
+	D9  = PB04 // TFT_RD
+	D10 = PB05 // TFT_DC
+	D11 = PB06 // TFT_CS
+	D12 = PB07 // TFT_TE
+	D13 = PB23 // built-in LED
+	D24 = PA00 // TFT_RESET
+	D25 = PB31 // TFT_BACKLIGHT
+	D26 = PB09 // TFT_WR
+	D27 = PB02 // SDA
+	D28 = PB03 // SCL
+	D29 = PA12 // MOSI
+	D30 = PA13 // SCK
+	D31 = PA14 // MISO
+	D32 = PB30 // SD_CS
+	D33 = PA01 // SD_CARD_DETECT
+	D34 = PA16 // LCD_DATA0
+	D35 = PA17 // LCD_DATA1
+	D36 = PA18 // LCD_DATA2
+	D37 = PA19 // LCD_DATA3
+	D38 = PA20 // LCD_DATA4
+	D39 = PA21 // LCD_DATA5
+	D40 = PA22 // LCD_DATA6
+	D41 = PA23 // LCD_DATA7
+	D42 = PB10 // QSPI
+	D43 = PB11 // QSPI
+	D44 = PA08 // QSPI
+	D45 = PA09 // QSPI
+	D46 = PA10 // QSPI
+	D47 = PA11 // QSPI
+	D50 = PA02 // speaker amplifier shutdown
+	D51 = PA15 // NINA_RTS
+
+	NINA_CS     = D8
+	NINA_ACK    = D5
+	NINA_GPIO0  = D6
+	NINA_RESETN = D7
+
+	NINA_TX  = D1
+	NINA_RX  = D0
+	NINA_RTS = D51
+
+	LCD_DATA0 = D34
+
+	TFT_RD        = D9
+	TFT_DC        = D10
+	TFT_CS        = D11
+	TFT_TE        = D12
+	TFT_RESET     = D24
+	TFT_BACKLIGHT = D25
+	TFT_WR        = D26
+
+	NEOPIXEL = D2
+	SPK_SD   = D50
+)
+
+// Analog pins
+const (
+	A0 = PA02 // ADC0/AIN[0]
+	A1 = D3   // ADC0/AIN[4]
+	A2 = PA07 // ADC0/AIN[7]
+	A3 = D4   // ADC0/AIN[5]
+	A4 = PB00 // ADC0/AIN[12]
+	A5 = PB01 // ADC0/AIN[13]
+	A6 = PA06 // ADC0/AIN[6]
+	A7 = PB08 // ADC1/AIN[0]
+
+	AUDIO_OUT = A0
+	LIGHT     = A2
+	TOUCH_YD  = A4
+	TOUCH_XL  = A5
+	TOUCH_YU  = A6
+	TOUCH_XR  = A7
+)
+
+const (
+	LED = D13
+)
+
+// UART0 aka USBCDC pins
+const (
+	USBCDC_DM_PIN = PA24
+	USBCDC_DP_PIN = PA25
+)
+
+// TODO: add configuration for UART on SERCOM4 that is connected to TX/RX of ESP32
+const (
+	UART_TX_PIN = NoPin
+	UART_RX_PIN = NoPin
+)
+
+// I2C pins
+const (
+	SDA_PIN = PB02 // SDA: SERCOM2/PAD[0]
+	SCL_PIN = PB03 // SCL: SERCOM2/PAD[1]
+)
+
+// I2C on the PyPortal.
+var (
+	I2C0 = I2C{Bus: sam.SERCOM5_I2CM,
+		SDA:     SDA_PIN,
+		SCL:     SCL_PIN,
+		PinMode: PinSERCOMAlt}
+)
+
+// SPI pins
+const (
+	SPI0_SCK_PIN  = PA13 // SCK: SERCOM1/PAD[1]
+	SPI0_MOSI_PIN = PA12 // MOSI: SERCOM1/PAD[3]
+	SPI0_MISO_PIN = PA14 // MISO: SERCOM1/PAD[2]
+
+	NINA_MOSI = SPI0_MOSI_PIN
+	NINA_MISO = SPI0_MISO_PIN
+	NINA_SCK  = SPI0_SCK_PIN
+)
+
+// SPI on the PyPortal.
+var (
+	SPI0 = SPI{Bus: sam.SERCOM2_SPIM,
+		SCK:         SPI0_SCK_PIN,
+		MOSI:        SPI0_MOSI_PIN,
+		MISO:        SPI0_MISO_PIN,
+		DOpad:       spiTXPad0SCK1,
+		DIpad:       sercomRXPad2,
+		MISOPinMode: PinSERCOM,
+		MOSIPinMode: PinSERCOM,
+		SCKPinMode:  PinSERCOM,
+	}
+	NINA_SPI = SPI0
+)