Difference between revisions of "ETRA SOM/ETRA Evaluation Kit/Interfaces and Connectors/Console"
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=== Device mapping === | === Device mapping === | ||
| − | + | USART1 is mapped to <code>/dev/ttyxxx</code> device in Linux. The peripheral is used as the default serial console, both for the bootloader and the kernel. | |
=== Device usage === | === Device usage === | ||
Revision as of 14:11, 31 December 2020
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Console interface[edit | edit source]
Description[edit | edit source]
The Console interface available on the Evaluation Kit at the connector J2.
J2 is a 4 pin (4x1x2.54mm) header connector for the two-wires USART1 port, used for debug purposes (bootloader and operating system serial console).
[[File:{Template:Nome-som-EVB-Console-connector.png|thumb|center|500px|Console connector]]
Signals[edit | edit source]
The following table describes the interface signals:
| Pin# | SOM Pin# | Pin name | Pin function | Pin Notes |
|---|---|---|---|---|
| 1 | J18.87 | N.A. | Transmit line | |
| 2 | J18.89 | RS232_RX | Receive line | |
| 3 | - | 3V3_CB | Power output | This pin can be used to power an RS232 transceiver |
| 4 | - | DGND | Ground |
Device mapping[edit | edit source]
USART1 is mapped to /dev/ttyxxx 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 UART to USB transceiver to J2 connector
- start your favorite terminal emulator software on PC (eg: PuTTY); communication parameters are: 115200,N,8,1
