boards: add Challenger RP2040 LoRa

src/machine/board_challenger_rp2040.go

@@ -0,0 +1,119 @@
+//go:build challenger_rp2040
+// +build challenger_rp2040
+
+package machine
+
+import (
+	"device/rp"
+	"runtime/interrupt"
+)
+
+const (
+	LED = GPIO24
+
+	// Onboard crystal oscillator frequency, in MHz.
+	xoscFreq = 12 // MHz
+)
+
+// GPIO Pins
+const (
+	D5  = GPIO2
+	D6  = GPIO3
+	D9  = GPIO4
+	D10 = GPIO5
+	D11 = GPIO6
+	D12 = GPIO7
+	D13 = GPIO8
+)
+
+// Analog pins
+const (
+	A0 = ADC0
+	A1 = ADC1
+	A2 = ADC2
+	A3 = ADC3
+)
+
+// I2C Pins.
+const (
+	I2C0_SDA_PIN = GPIO24
+	I2C0_SCL_PIN = GPIO25
+
+	I2C1_SDA_PIN = GPIO2
+	I2C1_SCL_PIN = GPIO3
+
+	SDA_PIN = I2C1_SDA_PIN
+	SCL_PIN = I2C1_SCL_PIN
+)
+
+// SPI default pins
+const (
+	// Default Serial Clock Bus 0 for SPI communications
+	SPI0_SCK_PIN = GPIO22
+	// Default Serial Out Bus 0 for SPI communications
+	SPI0_SDO_PIN = GPIO23 // Tx
+	// Default Serial In Bus 0 for SPI communications
+	SPI0_SDI_PIN = GPIO20 // Rx
+
+	// Default Serial Clock Bus 1 for SPI communications
+	SPI1_SCK_PIN = GPIO10
+	// Default Serial Out Bus 1 for SPI communications
+	SPI1_SDO_PIN = GPIO11 // Tx
+	// Default Serial In Bus 1 for SPI communications
+	SPI1_SDI_PIN = GPIO12 // Rx
+)
+
+// LoRa default pins
+const (
+	LORA_CS    = GPIO9
+	LORA_SCK   = GPIO10
+	LORA_SDO   = GPIO11
+	LORA_SDI   = GPIO12
+	LORA_RESET = GPIO13
+	LORA_DIO0  = GPIO14
+	LORA_DIO1  = GPIO15
+	LORA_DIO2  = GPIO18
+)
+
+// UART pins
+const (
+	UART0_TX_PIN = GPIO16
+	UART0_RX_PIN = GPIO17
+	UART1_TX_PIN = GPIO4
+	UART1_RX_PIN = GPIO5
+	UART_TX_PIN  = UART0_TX_PIN
+	UART_RX_PIN  = UART0_RX_PIN
+)
+
+// UART on the RP2040
+var (
+	UART0  = &_UART0
+	_UART0 = UART{
+		Buffer: NewRingBuffer(),
+		Bus:    rp.UART0,
+	}
+
+	UART1  = &_UART1
+	_UART1 = UART{
+		Buffer: NewRingBuffer(),
+		Bus:    rp.UART1,
+	}
+)
+
+var DefaultUART = UART0
+
+func init() {
+	UART0.Interrupt = interrupt.New(rp.IRQ_UART0_IRQ, _UART0.handleInterrupt)
+	UART1.Interrupt = interrupt.New(rp.IRQ_UART1_IRQ, _UART1.handleInterrupt)
+}
+
+// USB identifiers
+const (
+	usb_STRING_PRODUCT      = "Challenger 2040 LoRa"
+	usb_STRING_MANUFACTURER = "iLabs"
+)
+
+var (
+	usb_VID uint16 = 0x2e8a
+	usb_PID uint16 = 0x1023
+)