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Contents
UARTs interfaceEdit
DescriptionEdit
The UARTs interfaces are available on the Evaluation Kit at the connector J8
J8 is a 20x2x2.54mm pin header expansion connector that delivers many interfaces unused on board.
Some interfaces could not be available in a specific model.
[[File:{Template:Nome-som-EVB-UARTs-connector.png|thumb|center|500px|UARTs connector]]
SignalsEdit
The following table describes the interface signals:
| Pin# | SOM Pin# | Pin name | Pin function | Pin Notes |
|---|---|---|---|---|
| 7 | J15.150 | SAI2_TXFS | UART1_CTS | |
| 8 | J15.144 | SAI2_RXFS | UART1_TXD | |
| 10 | J15.140 | SAI2_RXC | UART1_RXD | |
| 11 | J15.142 | SAI2_RXD0 | UART1_RTS | |
Device mappingEdit
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 usageEdit
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