1// +build itsybitsy_m4 2 3package machine 4 5// used to reset into bootloader 6const RESET_MAGIC_VALUE = 0xf01669ef 7 8// GPIO Pins 9const ( 10 D0 = PA16 // UART0 RX/PWM available 11 D1 = PA17 // UART0 TX/PWM available 12 D2 = PA07 13 D3 = PB22 14 D4 = PA14 // PWM available 15 D5 = PA15 // PWM available 16 D6 = PB02 // dotStar clock 17 D7 = PA18 // PWM available 18 D8 = PB03 // dotStar data 19 D9 = PA19 // PWM available 20 D10 = PA20 // can be used for PWM or UART1 TX 21 D11 = PA21 // can be used for PWM or UART1 RX 22 D12 = PA23 // PWM available 23 D13 = PA22 // PWM available 24) 25 26// Analog pins 27const ( 28 A0 = PA02 // ADC/AIN[0] 29 A1 = PA05 // ADC/AIN[2] 30 A2 = PB08 // ADC/AIN[3] 31 A3 = PB09 // ADC/AIN[4] 32 A4 = PA04 // ADC/AIN[5] 33 A5 = PA06 // ADC/AIN[10] 34) 35 36const ( 37 LED = D13 38) 39 40// UART0 aka USBCDC pins 41const ( 42 USBCDC_DM_PIN = PA24 43 USBCDC_DP_PIN = PA25 44) 45 46// UART1 pins 47const ( 48 UART_TX_PIN = D1 49 UART_RX_PIN = D0 50) 51 52const ( 53 UART2_TX_PIN = A4 54 UART2_RX_PIN = D2 55) 56 57// I2C pins 58const ( 59 SDA_PIN = PA12 // SDA: SERCOM2/PAD[0] 60 SCL_PIN = PA13 // SCL: SERCOM2/PAD[1] 61) 62 63// SPI pins 64const ( 65 SPI0_SCK_PIN = PA01 // SCK: SERCOM1/PAD[1] 66 SPI0_SDO_PIN = PA00 // SDO: SERCOM1/PAD[0] 67 SPI0_SDI_PIN = PB23 // SDI: SERCOM1/PAD[3] 68) 69 70// USB CDC identifiers 71const ( 72 usb_STRING_PRODUCT = "Adafruit ItsyBitsy M4" 73 usb_STRING_MANUFACTURER = "Adafruit" 74) 75 76var ( 77 usb_VID uint16 = 0x239A 78 usb_PID uint16 = 0x802B 79) 80