1// +build feather_m4 2 3package machine 4 5// used to reset into bootloader 6const RESET_MAGIC_VALUE = 0xf01669ef 7 8// GPIO Pins 9const ( 10 D0 = PB17 // UART0 RX/PWM available 11 D1 = PB16 // UART0 TX/PWM available 12 D4 = PA14 // PWM available 13 D5 = PA16 // PWM available 14 D6 = PA18 // PWM available 15 D8 = PB03 // built-in neopixel 16 D9 = PA19 // PWM available 17 D10 = PA20 // can be used for PWM or UART1 TX 18 D11 = PA21 // can be used for PWM or UART1 RX 19 D12 = PA22 // PWM available 20 D13 = PA23 // PWM available 21 D21 = PA13 // PWM available 22 D22 = PA12 // PWM available 23 D23 = PB22 // PWM available 24 D24 = PB23 // PWM available 25 D25 = PA17 // PWM available 26) 27 28// Analog pins 29const ( 30 A0 = PA02 // ADC/AIN[0] 31 A1 = PA05 // ADC/AIN[2] 32 A2 = PB08 // ADC/AIN[3] 33 A3 = PB09 // ADC/AIN[4] 34 A4 = PA04 // ADC/AIN[5] 35 A5 = PA06 // ADC/AIN[10] 36) 37 38const ( 39 LED = D13 40) 41 42// UART0 aka USBCDC pins 43const ( 44 USBCDC_DM_PIN = PA24 45 USBCDC_DP_PIN = PA25 46) 47 48const ( 49 UART_TX_PIN = D1 50 UART_RX_PIN = D0 51) 52 53const ( 54 UART2_TX_PIN = A4 55 UART2_RX_PIN = A5 56) 57 58// I2C pins 59const ( 60 SDA_PIN = D22 // SDA: SERCOM2/PAD[0] 61 SCL_PIN = D21 // SCL: SERCOM2/PAD[1] 62) 63 64// SPI pins 65const ( 66 SPI0_SCK_PIN = D25 // SCK: SERCOM1/PAD[1] 67 SPI0_SDO_PIN = D24 // SDO: SERCOM1/PAD[3] 68 SPI0_SDI_PIN = D23 // SDI: SERCOM1/PAD[2] 69) 70 71// USB CDC identifiers 72const ( 73 usb_STRING_PRODUCT = "Adafruit Feather M4" 74 usb_STRING_MANUFACTURER = "Adafruit" 75) 76 77var ( 78 usb_VID uint16 = 0x239A 79 usb_PID uint16 = 0x8022 80) 81