activate custom send_ISR also for 1B write

gicking · gicking · commit 1557f9c6bf5e · 2019-11-24T10:37:10.000+01:00
- activate custom send_ISR also for 1B write
- previous solution only worked for &gt;=2B writes
diff --git a/cores/arduino/UARTClass.cpp b/cores/arduino/UARTClass.cpp
@@ -168,7 +168,14 @@ size_t UARTClass::write( const uint8_t uc_data )
   {
      // Bypass buffering and send character directly
      _pUart->UART_THR = uc_data;
+
+     // if custom routine attached, activate TXBUFE interrupt -> delay call until transmission finished
+     // must be done here explicitely because UART_TXRDY interrupt is not activated here
+     if (_isrTx != NULL) {
+       _pUart->UART_IER = UART_IER_TXEMPTY;
+     }
   }
+
   return 1;
 }
 

Original file line number	Diff line number	Diff line change
`@@ -168,7 +168,14 @@ size_t UARTClass::write( const uint8_t uc_data )`
`168`	`168`	`{`
`169`	`169`	`// Bypass buffering and send character directly`
`170`	`170`	`_pUart->UART_THR = uc_data;`
	`171`	`+`
	`172`	`+ // if custom routine attached, activate TXBUFE interrupt -> delay call until transmission finished`
	`173`	`+ // must be done here explicitely because UART_TXRDY interrupt is not activated here`
	`174`	`+ if (_isrTx != NULL) {`
	`175`	`+ _pUart->UART_IER = UART_IER_TXEMPTY;`
	`176`	`+ }`
`171`	`177`	`}`
	`178`	`+`
`172`	`179`	`return 1;`
`173`	`180`	`}`
`174`	`181`