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Print an error when serial number is invalid (#691)

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* Print error when serial number is invalid

* Move to the first check, change end by return
This commit is contained in:
copercini 2017-10-04 00:12:21 -03:00 committed by Me No Dev
parent 17a1a24009
commit 171032b701
1 changed files with 4 additions and 0 deletions
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cores/esp32/HardwareSerial.cpp
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@ -11,6 +11,10 @@ HardwareSerial::HardwareSerial(int uart_nr) : _uart_nr(uart_nr), _uart(NULL) {}
void HardwareSerial::begin(unsigned long baud, uint32_t config, int8_t rxPin, int8_t txPin) void HardwareSerial::begin(unsigned long baud, uint32_t config, int8_t rxPin, int8_t txPin)
{ {
if(0 > _uart_nr || _uart_nr > 2) {
log_e("Serial number is invalid, please use 0, 1 or 2");
return;
}
if(_uart) { if(_uart) {
end(); end();
} }