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products:sbc:common:applications:gpio:uart [2023/08/13 22:30] jacobe |
products:sbc:common:applications:gpio:uart [2024/08/06 08:27] (current) nick |
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===== UART Information ===== | ===== UART Information ===== | ||
- | | | + | | |
- | ^ VIM1/ | + | ^ VIM1/ |
- | | ::: | ::: | + | | ::: | ::: |
- | ^ VIM3/ | + | ^ VIM3/ |
- | | ::: | ::: | + | | ::: | ::: |
- | ^ VIM4 | + | ^ VIM4 |
- | | ::: | ::: | + | | ::: | ::: |
- | ^ VIM1S | UART_C | + | ^ VIM1S | UART_C |
- | | ::: | ::: | + | | ::: | ::: |
===== Enable UART ===== | ===== Enable UART ===== | ||
+ | |||
+ | ==== Linux ==== | ||
+ | |||
In order to use the UART, you need to enable the UART function via [[products: | In order to use the UART, you need to enable the UART function via [[products: | ||
Line 28: | Line 31: | ||
```shell | ```shell | ||
overlays=pwm_ao_a pwm_f uart3 | overlays=pwm_ao_a pwm_f uart3 | ||
+ | ``` | ||
+ | |||
+ | After reboot, you will see the UART device node. | ||
+ | |||
+ | ```shell | ||
+ | $ ls /dev/ttyS3 | ||
+ | /dev/ttyS3 | ||
+ | ``` | ||
+ | |||
+ | <tabbox VIM3 with 5.15 kernel> | ||
+ | |||
+ | Edit ''/ | ||
+ | |||
+ | |||
+ | e.g. Enable '' | ||
+ | |||
+ | ```shell | ||
+ | fdt_overlays=uart3 | ||
+ | |||
+ | ``` | ||
+ | |||
+ | After reboot, you will see the UART device node. | ||
+ | |||
+ | ```shell | ||
+ | $ ls /dev/ttyS3 | ||
+ | /dev/ttyS3 | ||
+ | ``` | ||
+ | |||
+ | <tabbox VIM3L with 5.15 kernel> | ||
+ | |||
+ | Edit ''/ | ||
+ | |||
+ | |||
+ | e.g. Enable '' | ||
+ | |||
+ | ```shell | ||
+ | fdt_overlays=uart3 | ||
+ | |||
``` | ``` | ||
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/dev/ttyS2 | /dev/ttyS2 | ||
``` | ``` | ||
+ | |||
+ | </ | ||
+ | |||
+ | |||
+ | ==== Android ==== | ||
+ | |||
+ | <tabbox VIM1S> | ||
+ | |||
+ | '' | ||
+ | |||
+ | |||
+ | <tabbox VIM4> | ||
+ | |||
+ | '' | ||
+ | |||
+ | <tabbox VIM3> | ||
+ | |||
+ | '' | ||
</ | </ | ||
Line 87: | Line 146: | ||
// set correct serial path | // set correct serial path | ||
- | #define SERIAL_PORT "/dev/ttyS4" | + | #define SERIAL_PORT "/dev/ttyS2" |
int main() { | int main() { | ||
Line 150: | Line 209: | ||
Compile test code: | Compile test code: | ||
- | '' | + | ``` |
+ | $ gcc uart.c -o uart | ||
+ | ``` | ||
===== Test demonstration ===== | ===== Test demonstration ===== |