Adafruit ItsyBitsy M4
The Adafruit ItsyBitsy M4 is very compact ARM development board based on the Atmel SAMD51 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 |
PA16 |
UART_RX_PIN |
TCC1 (channel 0), TCC0 (channel 4) |
D1 |
PA17 |
UART_TX_PIN |
TCC1 (channel 1), TCC0 (channel 5) |
D2 |
PA07 |
UART2_RX_PIN |
|
D3 |
PB22 |
||
D4 |
PA14 |
TCC2 (channel 0), TCC1 (channel 2) |
|
D5 |
PA15 |
TCC2 (channel 1), TCC1 (channel 3) |
|
D6 |
PB02 |
TCC2 (channel 2) |
|
D7 |
PA18 |
TCC1 (channel 2), TCC0 (channel 6) |
|
D8 |
PB03 |
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 |
PA23 |
TCC1 (channel 7), TCC0 (channel 3) |
|
D13 |
PA22 |
LED |
TCC1 (channel 6), TCC0 (channel 2) |
A0 |
PA02 |
||
A1 |
PA05 |
||
A2 |
PB08 |
||
A3 |
PB09 |
||
A4 |
PA04 |
UART2_TX_PIN |
|
A5 |
PA06 |
||
USBCDC_DM_PIN |
PA24 |
TCC2 (channel 2) |
|
USBCDC_DP_PIN |
PA25 |
TCC2 (channel 3) |
|
SDA_PIN |
PA12 |
TCC0 (channel 6), TCC1 (channel 2) |
|
SCL_PIN |
PA13 |
TCC0 (channel 7), TCC1 (channel 3) |
|
SPI0_SCK_PIN |
PA01 |
||
SPI0_SDO_PIN |
PA00 |
||
SPI0_SDI_PIN |
PB23 |
||
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 ItsyBitsy M4
Flashing
UF2
The ItsyBitsy M4 comes with the UF2 bootloader already installed.
CLI Flashing
-
Plug your ItsyBitsy M4 into your computer’s USB port.
-
Flash your TinyGo program to the board using this command:
tinygo flash -target=itsybitsy-m4 [PATH TO YOUR PROGRAM] -
The ItsyBitsy M4 board should restart and then begin running your program.
Troubleshooting
If you have troubles getting your ItsyBitsy M4 board to receive code, try this:
-
Press the “RESET” button on the board two times to get the ItsyBitsy M4 board ready to receive code.
-
The ItsyBitsy M4 board will appear to your computer like a USB drive.
-
Now try running the command as above:
tinygo flash -target=itsybitsy-m4 [PATH TO YOUR PROGRAM]
Once you have updated your ItsyBitsy 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 ItsyBitsy M4 as a serial port. UART0 refers to this connection.
The DotStar LED on the ItsyBitsy M4 can be accessed using the APA102 driver via a software SPI on the PB02 and PB03 pins