Peter Drescher / mbed-F401

mbed library with additional peripherals for ST F401 board

Fork of mbed-src by mbed official

This mbed LIB has additional peripherals for ST F401 board

  • UART2 : PA_3 rx, PA_2 tx
  • UART3 : PC_7 rx, PC_6 tx
  • I2C2 : PB_3 SDA, PB_10 SCL
  • I2C3 : PB_4 SDA, PA_8 SCL

Files at this revision

API Documentation at this revision

Revision 55:3b765ca737a5, committed 2013-12-09

Comitter:
mbed_official
Date:
Mon Dec 09 11:15:04 2013 +0000
Parent:
54:24d77221bceb
Child:
56:99eb381a3269
Commit message:
Synchronized with git revision faee2bf073820222f14e0baf95ec002e8cfec21e

Full URL: https://github.com/mbedmicro/mbed/commit/faee2bf073820222f14e0baf95ec002e8cfec21e/

- use TC flag instead of TXE for TX interrupt
- clear interrupt flags to prevent possible interrupt storm

Changed in this revision

targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/serial_api.c Show annotated file Show diff for this revision Revisions of this file 
--- a/targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/serial_api.c	Sat Dec 07 12:45:04 2013 +0000
+++ b/targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/serial_api.c	Mon Dec 09 11:15:04 2013 +0000
@@ -182,30 +182,21 @@
  ******************************************************************************/
 
 // not api
-void uart1_irq(void) {
-    USART_TypeDef *usart = (USART_TypeDef *)UART_1;  
-    if (serial_irq_ids[0] != 0) {
-        if (USART_GetITStatus(usart, USART_IT_TXE) != RESET) {
-            irq_handler(serial_irq_ids[0], TxIrq);
+static void uart_irq(USART_TypeDef* usart, int id) {
+    if (serial_irq_ids[id] != 0) {
+        if (USART_GetITStatus(usart, USART_IT_TC) != RESET) {
+            irq_handler(serial_irq_ids[id], TxIrq);
+            USART_ClearITPendingBit(usart, USART_IT_TC);
         }
         if (USART_GetITStatus(usart, USART_IT_RXNE) != RESET) {
-            irq_handler(serial_irq_ids[0], RxIrq);
+            irq_handler(serial_irq_ids[id], RxIrq);
+            USART_ClearITPendingBit(usart, USART_IT_RXNE);
         }
     }
 }
 
-// not api
-void uart2_irq(void) {
-    USART_TypeDef *usart = (USART_TypeDef *)UART_2;  
-    if (serial_irq_ids[1] != 0) {
-        if (USART_GetITStatus(usart, USART_IT_TXE) != RESET) {
-            irq_handler(serial_irq_ids[1], TxIrq);
-        }
-        if (USART_GetITStatus(usart, USART_IT_RXNE) != RESET) {
-            irq_handler(serial_irq_ids[1], RxIrq);
-        }
-    }
-}
+static void uart1_irq(void) {uart_irq((USART_TypeDef*)UART_1, 0);}
+static void uart2_irq(void) {uart_irq((USART_TypeDef*)UART_2, 1);}
 
 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
     irq_handler = handler;
@@ -233,7 +224,7 @@
             USART_ITConfig(usart, USART_IT_RXNE, ENABLE);
         }
         else { // TxIrq
-            USART_ITConfig(usart, USART_IT_TXE, ENABLE);
+            USART_ITConfig(usart, USART_IT_TC, ENABLE);
         }        
         
         NVIC_SetVector(irq_n, vector);