Prevent system hanging when writing to UART before enabling.

h2zero · h2zero · commit a0489e13b973 · 2024-02-28T12:03:31.000-07:00
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);

Original file line number	Diff line number	Diff line change
`@@ -224,6 +224,10 @@ int Uart::read()`
`224`	`224`
`225`	`225`	`size_t Uart::write(const uint8_t data)`
`226`	`226`	`{`
	`227`	`+ if (!nrfUart->ENABLE) {`
	`228`	`+ return 0;`
	`229`	`+ }`
	`230`	`+`
`227`	`231`	`nrfUart->TXD = data;`
`228`	`232`
`229`	`233`	`while(!nrfUart->EVENTS_TXDRDY);`