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boards/seeedsudio-gd32: documentation fix

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This commit is contained in:
Gunar Schorcht 2023-07-03 11:48:01 +02:00
parent 92529a8d14
commit e26f08d179
1 changed files with 15 additions and 5 deletions
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boards/seeedstudio-gd32/doc.txt
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@ -46,7 +46,7 @@ on-board components:
| I2S | 2 | no | | I2S | 2 | no |
| CAN | 2 x CAN 2.0B with up to 1 Mbps | no | | CAN | 2 x CAN 2.0B with up to 1 Mbps | no |
| PWM | 6 Channels | yes | | PWM | 6 Channels | yes |
| USB | 1 x USB FS OTG | no | | USB | 1 x USB FS OTG | yes |
| Vcc | 3.0V - 3.6V | | | Vcc | 3.0V - 3.6V | |
| Datasheet | [Datasheet](https://gd32mcu.com/data/documents/datasheet/GD32VF103_Datasheet_Rev1.6.pdf) | | | Datasheet | [Datasheet](https://gd32mcu.com/data/documents/datasheet/GD32VF103_Datasheet_Rev1.6.pdf) | |
| Reference Manual | [Reference Manual](https://gd32mcu.com/download/down/document_id/222/path_type/1) | | | Reference Manual | [Reference Manual](https://gd32mcu.com/download/down/document_id/222/path_type/1) | |
@ -167,18 +167,28 @@ If another adapter is used, it can be specified using variable
OPENOCD_DEBUG_ADAPTER=jlink BOARD=seeedstudio-gd32 make -C examples/hello-world flash OPENOCD_DEBUG_ADAPTER=jlink BOARD=seeedstudio-gd32 make -C examples/hello-world flash
``` ```
## Accessing STDIO via UART ## Accessing STDIO
The `stdio` is directly accessible through the first UART interface. If an By default, the `stdio` is provided by the USBUS CDC ACM module `stdio_cdc_acm`.
This interface is mapped to `/dev/ttyACM<n>` on a Linux host, where `<n>` is
the index of the CDC ACM interface, which is 0 by default.
To use the first UART interface for `stdio` instead, the `stdio_uart` module
has to be enabled:
```
USEMODULE=stdio_uart BOARD=seeedstudio-gd32 make -C examples/hello-world flash
```
The `stdio` is then directly accessible through the first UART interface. If an
external USB-to-UART interface is used, this interface is mapped to external USB-to-UART interface is used, this interface is mapped to
`/dev/ttyUSB<n>` on a Linux host, where `<n>` is the index of the UART `/dev/ttyUSB<n>` on a Linux host, where `<n>` is the index of the UART
interface, which is 0 by default. interface, which is 0 by default.
Use the `term` target to connect to the board using `/dev/ttyUSB0`: Use the `term` target to connect to the board using `/dev/ttyUSB0`:
``` ```
BOARD=seeedstudio-gd32 make -C examples/hello-world term BOARD=seeedstudio-gd32 make -C examples/hello-world term PORT=/dev/ttyUSB0
``` ```
If the UART interface index of board's USB to UART bridge is not 0, use If the UART interface index of the USB-to-UART interface is not 0, use
the following command to connect: the following command to connect:
``` ```
BOARD=seeedstudio-gd32 make -C examples/hello-world term PORT=/dev/ttyUSB<n> BOARD=seeedstudio-gd32 make -C examples/hello-world term PORT=/dev/ttyUSB<n>