Adafruit Feather M4
The Adafruit Feather M4 is a tiny ARM development board based on the Atmel ATSAMD51J19 family of SoC.
Interfaces
| Interface | Hardware Supported | TinyGo Support |
|---|---|---|
| GPIO | YES | YES |
| UART | YES | YES |
| SPI | YES | YES |
| I2C | YES | YES |
| ADC | YES | YES |
| PWM | YES | YES |
| USBDevice | YES | YES |
Pins
| Pin | Hardware pin | Alternative names | PWM |
|---|---|---|---|
D0 |
PB17 |
UART_RX_PIN |
TCC3 (channel 1), TCC0 (channel 5) |
D1 |
PB16 |
UART_TX_PIN |
TCC3 (channel 0), TCC0 (channel 4) |
D4 |
PA14 |
TCC2 (channel 0), TCC1 (channel 2) |
|
D5 |
PA16 |
TCC1 (channel 0), TCC0 (channel 4) |
|
D6 |
PA18 |
TCC1 (channel 2), TCC0 (channel 6) |
|
D8 |
PB03 |
WS2812 |
TCC2 (channel 3) |
D9 |
PA19 |
TCC1 (channel 3), TCC0 (channel 7) |
|
D10 |
PA20 |
TCC1 (channel 4), TCC0 (channel 0) |
|
D11 |
PA21 |
TCC1 (channel 5), TCC0 (channel 1) |
|
D12 |
PA22 |
TCC1 (channel 6), TCC0 (channel 2) |
|
D13 |
PA23 |
LED |
TCC1 (channel 7), TCC0 (channel 3) |
D21 |
PA13 |
SCL_PIN |
TCC0 (channel 7), TCC1 (channel 3) |
D22 |
PA12 |
SDA_PIN |
TCC0 (channel 6), TCC1 (channel 2) |
D23 |
PB22 |
SPI0_SDI_PIN |
|
D24 |
PB23 |
SPI0_SDO_PIN |
|
D25 |
PA17 |
SPI0_SCK_PIN |
TCC1 (channel 1), TCC0 (channel 5) |
A0 |
PA02 |
||
A1 |
PA05 |
||
A2 |
PB08 |
||
A3 |
PB09 |
||
A4 |
PA04 |
UART2_TX_PIN |
|
A5 |
PA06 |
UART2_RX_PIN |
|
USBCDC_DM_PIN |
PA24 |
TCC2 (channel 2) |
|
USBCDC_DP_PIN |
PA25 |
TCC2 (channel 3) |
|
QSPI_SCK |
PB10 |
TCC0 (channel 4), TCC1 (channel 0) |
|
QSPI_CS |
PB11 |
TCC0 (channel 5), TCC1 (channel 1) |
|
QSPI_DATA0 |
PA08 |
TCC0 (channel 0), TCC1 (channel 4) |
|
QSPI_DATA1 |
PA09 |
TCC0 (channel 1), TCC1 (channel 5) |
|
QSPI_DATA2 |
PA10 |
TCC0 (channel 2), TCC1 (channel 6) |
|
QSPI_DATA3 |
PA11 |
TCC0 (channel 3), TCC1 (channel 7) |
Machine Package Docs
Documentation for the machine package for the Adafruit Feather M4
Flashing
UF2
The Feather M4 comes with the UF2 bootloader already installed.
CLI Flashing
-
Plug your Feather M4 into your computer’s USB port.
-
Flash your TinyGo program to the board using this command:
tinygo flash -target=feather-m4 [PATH TO YOUR PROGRAM] -
The Feather M4 board should restart and then begin running your program.
Troubleshooting
If you have troubles getting your Feather M4 board to receive code, try this:
- Press the “RESET” button on the board two times to get the Feather M4 board ready to receive code.
- The Feather M4 board will appear to your computer like a USB drive.
- Now try running the command as above:
tinygo flash -target=feather-m4 [PATH TO YOUR PROGRAM]
Once you have updated your Feather M4 board the first time, after that you should be able to flash it entirely from the command line.
Notes
You can use the USB port to the Feather M4 as a serial port. UART0 refers to this connection.