Prevent system hanging when writing to UART before enabling.

h2zero · Feb 28, 2024 · a0489e1 · a0489e1
1 parent b978788
commit a0489e1
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/cores/nRF5/Uart.cpp b/cores/nRF5/Uart.cpp
@@ -224,6 +224,10 @@ int Uart::read()
 
 size_t Uart::write(const uint8_t data)
 {
+ if (!nrfUart->ENABLE) {
+ return 0;
+ }
+
  nrfUart->TXD = data;
 
  while(!nrfUart->EVENTS_TXDRDY);