39 lines
1.1 KiB
Markdown
39 lines
1.1 KiB
Markdown
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## Serial UART
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There are two implementations of Serial communication: UART and USB.
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This page describes the UART based.
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Please check the [Menu option](menu_options#automatic-serial) to see which one is selected.
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**`SerialUART1`**is bound to UART1, **`SerialUART2`** to UART2 etc...
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Please refer to the [official documentation](https://www.arduino.cc/en/reference/serial) for
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the description of Serial functions.
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#### **`SerialUARTx.stm32SetRX(uint8_t pin)`**
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Set the RX signal to the specified pin. Please check the chip documentation for which pin can be used for RX.
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This must be called before begin()!
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#### **`SerialUARTx.stm32SetTx(uint8_t pin)`**
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Set the TX signal to the specified pin. Please check the chip documentation for which pin can be used for TX.
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This must be called before begin()!
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> Example: The following code will echo the received bytes on UART2
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```c++
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void setup() {
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SerialUART2.stm32SetRX(Pcd);
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SerialUART2.stm32SetTX(Pab);
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SerualUART2.begin(115200);
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}
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void loop() {
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int data = SerialUART2.read();
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if (data != -1) {
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SerialUART2.write(data);
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}
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}
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```
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