ORCA SOM/ORCA Evaluation Kit/Interfaces and Connectors/GPIOs
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GPIOs interface[edit | edit source]
TBD: sostituire le sezioni con le informazioni sull'uso della periferica e del suo connettore Nell'esempio di seguito c'è la descrizione dell'interfaccia UART/console
Description[edit | edit source]
The GPIOs interface available on the Evaluation Kit at the connector TBD:Jxxx.
Jxx is a TBD:connector-type header connector for the RS232 two-wires UART3 port, used for debug purposes (bootloader and operating system serial console).
[[File:{Template:Nome-som-EVB-GPIOs-connector.png|thumb|center|500px|GPIOs connector]]
Signals[edit | edit source]
The following table describes the interface signals:
| Pin# | SOM Pin# | Pin name | Pin function | Pin Notes |
|---|---|---|---|---|
| 7 | ||||
| 8 | ||||
| 10 | ||||
| 11 | ||||
| 12 | ||||
| 13 | ||||
| 15 | ||||
| 16 | ||||
| 18 | ||||
| 19 | ECSPI2_MOSI | I2C3_SDA | ||
| 21 | ECSPI2_MISO | I2C4_SCL | ||
| 22 | SAI5_MCLK | I2C5_SDA | ||
| 23 | ECSPI2_SCLK | I2C3_SCL | ||
| 24 | ECSPI2_SS0 | I2C4_SDA | ||
| 26 | ||||
| 27 | ||||
| 28 | ||||
| 29 | ||||
| 31 | ||||
| 32 | SAI5_RXFS | I2C6_SCL | ||
| 33 | ||||
| 35 | ||||
| 36 | ||||
| 37 | ||||
| 38 | SAI5_RXD0 | I2C5_SCL | ||
| 40 | SAI5_RXC | I2C6_SDA | ||
| 1, 17 | - | 3V3_CB | +3.3V | BOARD_PGOOD driven rail |
| 2, 4 | - | 5V_VIN | +5V | Always powered |
| 6, 9, 14, 20, 25, 30, 34, 39 | - | DGND | Ground |
Device mapping[edit | edit source]
UART3 is mapped to /dev/ttymxc2 device in Linux. The peripheral is used as the default serial console, both for the bootloader and the kernel.
Device usage[edit | edit source]
To connect to the debug serial port:
- connect the DB9 adapter bracket to the J22 connector on the SBCX board
- connect a serial cable between DB9 connector and PC COM port through a NULL-modem cable (not provided)
- start your favorite terminal emulator software on PC (eg: PuTTY); communication parameters are: 115200,N,8,1
