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Allows setting only one pin (rx or tx) in the first begin() (#6394)

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Rodrigo Garcia
2022-03-10 10:33:27 -03:00
committed by GitHub
parent 9b00d4ae6b
commit 883241229e
1 changed files with 12 additions and 6 deletions
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18
cores/esp32/HardwareSerial.cpp
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@ -261,19 +261,25 @@ void HardwareSerial::begin(unsigned long baud, uint32_t config, int8_t rxPin, in
if (!uartIsDriverInstalled(_uart)) { if (!uartIsDriverInstalled(_uart)) {
switch (_uart_nr) { switch (_uart_nr) {
case UART_NUM_0: case UART_NUM_0:
rxPin = rxPin < 0 ? SOC_RX0 : rxPin; if (rxPin < 0 && txPin < 0) {
txPin = txPin < 0 ? SOC_TX0 : txPin; rxPin = SOC_RX0;
txPin = SOC_TX0;
}
break; break;
#if SOC_UART_NUM > 1 // may save some flash bytes... #if SOC_UART_NUM > 1 // may save some flash bytes...
case UART_NUM_1: case UART_NUM_1:
rxPin = rxPin < 0 ? RX1 : rxPin; if (rxPin < 0 && txPin < 0) {
txPin = txPin < 0 ? TX1 : txPin; rxPin = RX1;
txPin = TX1;
}
break; break;
#endif #endif
#if SOC_UART_NUM > 2 // may save some flash bytes... #if SOC_UART_NUM > 2 // may save some flash bytes...
case UART_NUM_2: case UART_NUM_2:
rxPin = rxPin < 0 ? RX2 : rxPin; if (rxPin < 0 && txPin < 0) {
txPin = txPin < 0 ? TX2 : txPin; rxPin = RX2;
txPin = TX2;
}
break; break;
#endif #endif
default: default: