github.com/tinygo-org/tinygo@v0.31.3-0.20240404173401-90b0bf646c27/src/machine/board_xiao.go (about)

     1  //go:build sam && atsamd21 && xiao
     2  
     3  package machine
     4  
     5  // used to reset into bootloader
     6  const resetMagicValue = 0xf01669ef
     7  
     8  // GPIO Pins
     9  const (
    10  	D0  = PA02 // can be used for PWM or DAC
    11  	D1  = PA04 // PWM available
    12  	D2  = PA10 // PWM available
    13  	D3  = PA11 // PWM available
    14  	D4  = PA08 // can be used for PWM or I2C SDA
    15  	D5  = PA09 // can be used for PWM or I2C SCL
    16  	D6  = PB08 // can be used for PWM or UART1 TX
    17  	D7  = PB09 // can be used for PWM or UART1 RX
    18  	D8  = PA07 // can be used for PWM or SPI SCK
    19  	D9  = PA05 // can be used for PWM or SPI SDI
    20  	D10 = PA06 // can be used for PWM or SPI SDO
    21  )
    22  
    23  // Analog pins
    24  const (
    25  	A0  = PA02 // ADC/AIN[0]
    26  	A1  = PA04 // ADC/AIN[4]
    27  	A2  = PA10 // ADC/AIN[18]
    28  	A3  = PA11 // ADC/AIN[19]
    29  	A4  = PA08 // ADC/AIN[16]
    30  	A5  = PA09 // ADC/AIN[17]
    31  	A6  = PB08 // ADC/AIN[2]
    32  	A7  = PB09 // ADC/AIN[3]
    33  	A8  = PA07 // ADC/AIN[7]
    34  	A9  = PA05 // ADC/AIN[6]
    35  	A10 = PA06 // ADC/AIN[5]
    36  )
    37  
    38  const (
    39  	LED     = PA17
    40  	LED_RXL = PA18
    41  	LED_TXL = PA19
    42  	LED2    = LED_RXL
    43  	LED3    = LED_TXL
    44  )
    45  
    46  // USBCDC pins
    47  const (
    48  	USBCDC_DM_PIN = PA24
    49  	USBCDC_DP_PIN = PA25
    50  )
    51  
    52  // UART1 pins
    53  const (
    54  	UART_TX_PIN = D6
    55  	UART_RX_PIN = D7
    56  )
    57  
    58  // UART1 on the Xiao
    59  var UART1 = &sercomUSART4
    60  
    61  // I2C pins
    62  const (
    63  	SDA_PIN = PA08 // SDA: SERCOM2/PAD[0]
    64  	SCL_PIN = PA09 // SCL: SERCOM2/PAD[1]
    65  )
    66  
    67  // I2C on the Xiao
    68  var (
    69  	I2C0 = sercomI2CM2
    70  )
    71  
    72  // SPI pins
    73  const (
    74  	SPI0_SCK_PIN = PA07 // SCK: SERCOM0/PAD[3]
    75  	SPI0_SDO_PIN = PA06 // SDO: SERCOM0/PAD[2]
    76  	SPI0_SDI_PIN = PA05 // SDI: SERCOM0/PAD[1]
    77  )
    78  
    79  // SPI on the Xiao
    80  var SPI0 = sercomSPIM0
    81  
    82  // I2S pins
    83  const (
    84  	I2S_SCK_PIN = PA10
    85  	I2S_SD_PIN  = PA08
    86  	I2S_WS_PIN  = NoPin // TODO: figure out what this is on Xiao
    87  )
    88  
    89  // USB CDC identifiers
    90  const (
    91  	usb_STRING_PRODUCT      = "Seeed XIAO M0"
    92  	usb_STRING_MANUFACTURER = "Seeed"
    93  )
    94  
    95  var (
    96  	usb_VID uint16 = 0x2886
    97  	usb_PID uint16 = 0x802F
    98  )
    99  
   100  var (
   101  	DefaultUART = UART1
   102  )