Adafruit Grand Central M4
The Adafruit Grand Central M4 is a tiny ARM development board based on the Atmel ATSAMD51P20 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 |
PB25 |
UART1_RX_PIN, UART_RX_PIN |
|
D1 |
PB24 |
UART1_TX_PIN, UART_TX_PIN |
|
D2 |
PC18 |
TCC0 (channel 2) |
|
D3 |
PC19 |
TCC0 (channel 3) |
|
D4 |
PC20 |
TCC0 (channel 4) |
|
D5 |
PC21 |
TCC0 (channel 5) |
|
D6 |
PD20 |
TCC1 (channel 0) |
|
D7 |
PD21 |
TCC1 (channel 1) |
|
D8 |
PB18 |
TCC1 (channel 0) |
|
D9 |
PB02 |
TCC2 (channel 2) |
|
D10 |
PB22 |
||
D11 |
PB23 |
||
D12 |
PB00 |
||
D13 |
PB01 |
D87, LED_PIN, LED |
|
D14 |
PB16 |
UART4_TX_PIN, I2S0_SCK_PIN, I2S_SCK_PIN |
TCC3 (channel 0), TCC0 (channel 4) |
D15 |
PB17 |
UART4_RX_PIN, I2S0_MCK_PIN |
TCC3 (channel 1), TCC0 (channel 5) |
D16 |
PC22 |
UART3_TX_PIN |
TCC0 (channel 6) |
D17 |
PC23 |
UART3_RX_PIN |
TCC0 (channel 7) |
D18 |
PB12 |
UART2_TX_PIN |
TCC3 (channel 0), TCC0 (channel 0) |
D19 |
PB13 |
UART2_RX_PIN |
TCC3 (channel 1), TCC0 (channel 1) |
D20 |
PB20 |
D62, I2C0_SDA_PIN, I2C_SDA_PIN, SDA_PIN |
TCC1 (channel 2) |
D21 |
PB21 |
D63, I2C0_SCL_PIN, I2C_SCL_PIN, SCL_PIN |
TCC1 (channel 3) |
D22 |
PD12 |
TCC0 (channel 5) |
|
D23 |
PA15 |
TCC2 (channel 1), TCC1 (channel 3) |
|
D24 |
PC17 |
I2C1_SCL_PIN |
TCC0 (channel 1) |
D25 |
PC16 |
I2C1_SDA_PIN |
TCC0 (channel 0) |
D26 |
PA12 |
TCC0 (channel 6), TCC1 (channel 2) |
|
D27 |
PA13 |
TCC0 (channel 7), TCC1 (channel 3) |
|
D28 |
PA14 |
TCC2 (channel 0), TCC1 (channel 2) |
|
D29 |
PB19 |
TCC1 (channel 1) |
|
D30 |
PA23 |
TCC1 (channel 7), TCC0 (channel 3) |
|
D31 |
PA22 |
I2S0_SDI_PIN |
TCC1 (channel 6), TCC0 (channel 2) |
D32 |
PA21 |
I2S0_SDO_PIN, I2S_SD_PIN |
TCC1 (channel 5), TCC0 (channel 1) |
D33 |
PA20 |
I2S0_FS_PIN, I2S_WS_PIN |
TCC1 (channel 4), TCC0 (channel 0) |
D34 |
PA19 |
TCC1 (channel 3), TCC0 (channel 7) |
|
D35 |
PA18 |
TCC1 (channel 2), TCC0 (channel 6) |
|
D36 |
PA17 |
TCC1 (channel 1), TCC0 (channel 5) |
|
D37 |
PA16 |
TCC1 (channel 0), TCC0 (channel 4) |
|
D38 |
PB15 |
TCC4 (channel 1), TCC0 (channel 3) |
|
D39 |
PB14 |
TCC4 (channel 0), TCC0 (channel 2) |
|
D40 |
PC13 |
TCC0 (channel 3), TCC1 (channel 7) |
|
D41 |
PC12 |
TCC0 (channel 2), TCC1 (channel 6) |
|
D42 |
PC15 |
TCC0 (channel 5), TCC1 (channel 1) |
|
D43 |
PC14 |
TCC0 (channel 4), TCC1 (channel 0) |
|
D44 |
PC11 |
TCC0 (channel 1), TCC1 (channel 5) |
|
D45 |
PC10 |
TCC0 (channel 0), TCC1 (channel 4) |
|
D46 |
PC06 |
||
D47 |
PC07 |
||
D48 |
PC04 |
TCC0 (channel 0) |
|
D49 |
PC05 |
TCC0 (channel 1) |
|
D50 |
PD11 |
D64, SPI0_SDI_PIN, SPI_SDI_PIN |
TCC0 (channel 4) |
D51 |
PD08 |
D65, SPI0_SDO_PIN, SPI_SDO_PIN |
TCC0 (channel 1) |
D52 |
PD09 |
D66, SPI0_SCK_PIN, SPI_SCK_PIN |
TCC0 (channel 2) |
D53 |
PD10 |
SPI0_CS_PIN, SPI_CS_PIN |
TCC0 (channel 3) |
D54 |
PB05 |
A8 |
|
D55 |
PB06 |
A9 |
|
D56 |
PB07 |
A10 |
|
D57 |
PB08 |
A11 |
|
D58 |
PB09 |
A12 |
|
D59 |
PA04 |
A13 |
|
D60 |
PA06 |
A14 |
|
D61 |
PA07 |
A15 |
|
D67 |
PA02 |
D85, A0 |
|
D68 |
PA05 |
D86, A1 |
|
D69 |
PB03 |
A2 |
TCC2 (channel 3) |
D70 |
PC00 |
A3 |
|
D71 |
PC01 |
A4 |
|
D72 |
PC02 |
A5 |
|
D73 |
PC03 |
A6 |
|
D74 |
PB04 |
A7 |
|
D75 |
PC31 |
UART_RX_LED_PIN, LED_RX |
|
D76 |
PC30 |
UART_TX_LED_PIN, LED_TX |
|
D77 |
PA27 |
USBCDC_HOSTEN_PIN |
|
D78 |
PA24 |
USBCDC_DM_PIN |
TCC2 (channel 2) |
D79 |
PA25 |
USBCDC_DP_PIN |
TCC2 (channel 3) |
D80 |
PB29 |
SPI1_SDI_PIN, SD0_SDI_PIN, SDCARD_SDI_PIN |
TCC1 (channel 5) |
D81 |
PB27 |
SPI1_SCK_PIN, SD0_SCK_PIN, SDCARD_SCK_PIN |
TCC1 (channel 3) |
D82 |
PB26 |
SPI1_SDO_PIN, SD0_SDO_PIN, SDCARD_SDO_PIN |
TCC1 (channel 2) |
D83 |
PB28 |
SD0_CS_PIN, SDCARD_CS_PIN |
TCC1 (channel 4) |
D84 |
PA03 |
AREF |
|
D88 |
PC24 |
NEOPIXEL_PIN, NEOPIXEL, WS2812 |
|
D89 |
PB10 |
QSPI_SCK |
TCC0 (channel 4), TCC1 (channel 0) |
D90 |
PB11 |
QSPI_CS |
TCC0 (channel 5), TCC1 (channel 1) |
D91 |
PA08 |
QSPI_DATA0 |
TCC0 (channel 0), TCC1 (channel 4) |
D92 |
PA09 |
QSPI_DATA1 |
TCC0 (channel 1), TCC1 (channel 5) |
D93 |
PA10 |
QSPI_DATA2 |
TCC0 (channel 2), TCC1 (channel 6) |
D94 |
PA11 |
QSPI_DATA3 |
TCC0 (channel 3), TCC1 (channel 7) |
D95 |
PB31 |
SD0_DET_PIN, SDCARD_DET_PIN |
TCC4 (channel 1), TCC0 (channel 7) |
D96 |
PB30 |
TCC4 (channel 0), TCC0 (channel 6) |
Machine Package Docs
Documentation for the machine package for the Adafruit Grand Central M4
Flashing
UF2
The Grand Central M4 comes with the UF2 bootloader already installed.
CLI Flashing
-
Plug your Grand Central M4 into your computer’s USB port.
-
Flash your TinyGo program to the board using this command:
tinygo flash -target=grandcentral-m4 [PATH TO YOUR PROGRAM] -
The Grand Central M4 board should restart and then begin running your program.
Troubleshooting
If you have troubles getting your Grand Central M4 board to receive code, try this:
- Press the “RESET” button on the board two times to get the Grand Central M4 board ready to receive code.
- The Grand Central M4 board will appear to your computer like a USB drive.
- Now try running the command as above:
tinygo flash -target=grandcentral-m4 [PATH TO YOUR PROGRAM]
Once you have updated your Grand Central 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 Grand Central M4 as a serial port. UART0 refers to this connection.
The Neopixel LED on the Grand Central M4 can be accessed using the WS2812 driver via the PC24 pin