fix: Prevent enabling USART IRQ if not supported (#4086)

Fixes #4073
2023-09-23 14:45:15 +10:00
parent 5597cf6476
commit 60ccd852e3
1 changed files with 3 additions and 1 deletions
@@ -289,7 +289,9 @@ void stm32_usart_init(const stm32_usart_t* usart, const etx_serial_init* params)

  if (params->direction & ETX_Dir_RX) {
    // IRQ based RX
-    LL_USART_EnableIT_RXNE(usart->USARTx);
+    if ((int32_t)(usart->IRQn) >= 0) {
+      LL_USART_EnableIT_RXNE(usart->USARTx);
+    }

    // half-duplex: start in input mode
    if (usart->set_input)