Merge pull request #1895 from bcostm/fix_l0_force_serial_reset

[STM32L0] Add USART force/release Reset at Init phase
ARMmbed · Jun 14, 2016 · 53d7115 · 53d7115
2 parents 4dcefa6 + 6e645e5
commit 53d7115
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/hal/targets/hal/TARGET_STM/TARGET_STM32L0/serial_api.c b/hal/targets/hal/TARGET_STM/TARGET_STM32L0/serial_api.c
@@ -93,30 +93,40 @@ void serial_init(serial_t *obj, PinName tx, PinName rx)
     // Enable UART clock
 #if defined(USART1_BASE)
     if (obj->uart == UART_1) {
+        __HAL_RCC_USART1_FORCE_RESET();
+        __HAL_RCC_USART1_RELEASE_RESET();
         __HAL_RCC_USART1_CLK_ENABLE();
         obj->index = 0;
     }
 #endif
 
     if (obj->uart == UART_2) {
+        __HAL_RCC_USART2_FORCE_RESET();
+        __HAL_RCC_USART2_RELEASE_RESET();
         __HAL_RCC_USART2_CLK_ENABLE();
         obj->index = 1;
     }
 
     if (obj->uart == LPUART_1) {
+        __HAL_RCC_LPUART1_FORCE_RESET();
+        __HAL_RCC_LPUART1_RELEASE_RESET();
         __HAL_RCC_LPUART1_CLK_ENABLE();
         obj->index = 2;
     }
 
 #if defined(USART4_BASE)
     if (obj->uart == UART_4) {
+        __HAL_RCC_USART4_FORCE_RESET();
+        __HAL_RCC_USART4_RELEASE_RESET();
         __HAL_RCC_USART4_CLK_ENABLE();
         obj->index = 3;
     }
 #endif
 
 #if defined(USART5_BASE)
     if (obj->uart == UART_5) {
+        __HAL_RCC_USART5_FORCE_RESET();
+        __HAL_RCC_USART5_RELEASE_RESET();
         __HAL_RCC_USART5_CLK_ENABLE();
         obj->index = 4;
     }