John Karatka
mbed
Fork of
mbed-dev
by 
mbed official
Diff: targets/TARGET_STM/serial_api.c
- Revision:
- 182:57724642e740
- Parent:
- 181:96ed750bd169
diff -r 96ed750bd169 -r 57724642e740 targets/TARGET_STM/serial_api.c
--- a/targets/TARGET_STM/serial_api.c Wed Jan 17 15:23:54 2018 +0000
+++ b/targets/TARGET_STM/serial_api.c Fri Feb 16 16:09:33 2018 +0000
@@ -38,10 +38,14 @@
extern UART_HandleTypeDef uart_handlers[];
extern uint32_t serial_irq_ids[];
+// Utility functions
+HAL_StatusTypeDef init_uart(serial_t *obj);
+int8_t get_uart_index(UARTName uart_name);
+
void serial_init(serial_t *obj, PinName tx, PinName rx)
{
struct serial_s *obj_s = SERIAL_S(obj);
- int IndexNumber = 0;
+ uint8_t stdio_config = 0;
// Determine the UART to use (UART_1, UART_2, ...)
UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
@@ -51,15 +55,22 @@
obj_s->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
MBED_ASSERT(obj_s->uart != (UARTName)NC);
- // Enable USART clock
+ if ((tx == STDIO_UART_TX) || (rx == STDIO_UART_RX)) {
+ stdio_config = 1;
+ }
+ else {
+ if (uart_tx == pinmap_peripheral(STDIO_UART_TX, PinMap_UART_TX)) {
+ error("Error: new serial object is using same UART as STDIO");
+ }
+ }
+
+ // Reset and enable clock
#if defined(USART1_BASE)
if (obj_s->uart == UART_1) {
__HAL_RCC_USART1_FORCE_RESET();
__HAL_RCC_USART1_RELEASE_RESET();
__HAL_RCC_USART1_CLK_ENABLE();
- obj_s->index = IndexNumber;
}
- IndexNumber++;
#endif
#if defined (USART2_BASE)
@@ -67,9 +78,7 @@
__HAL_RCC_USART2_FORCE_RESET();
__HAL_RCC_USART2_RELEASE_RESET();
__HAL_RCC_USART2_CLK_ENABLE();
- obj_s->index = IndexNumber;
}
- IndexNumber++;
#endif
#if defined(USART3_BASE)
@@ -77,9 +86,7 @@
__HAL_RCC_USART3_FORCE_RESET();
__HAL_RCC_USART3_RELEASE_RESET();
__HAL_RCC_USART3_CLK_ENABLE();
- obj_s->index = IndexNumber;
}
- IndexNumber++;
#endif
#if defined(UART4_BASE)
@@ -87,9 +94,7 @@
__HAL_RCC_UART4_FORCE_RESET();
__HAL_RCC_UART4_RELEASE_RESET();
__HAL_RCC_UART4_CLK_ENABLE();
- obj_s->index = IndexNumber;
}
- IndexNumber++;
#endif
#if defined(USART4_BASE)
@@ -97,9 +102,7 @@
__HAL_RCC_USART4_FORCE_RESET();
__HAL_RCC_USART4_RELEASE_RESET();
__HAL_RCC_USART4_CLK_ENABLE();
- obj_s->index = IndexNumber;
}
- IndexNumber++;
#endif
#if defined(UART5_BASE)
@@ -107,9 +110,7 @@
__HAL_RCC_UART5_FORCE_RESET();
__HAL_RCC_UART5_RELEASE_RESET();
__HAL_RCC_UART5_CLK_ENABLE();
- obj_s->index = IndexNumber;
}
- IndexNumber++;
#endif
#if defined(USART5_BASE)
@@ -117,9 +118,7 @@
__HAL_RCC_USART5_FORCE_RESET();
__HAL_RCC_USART5_RELEASE_RESET();
__HAL_RCC_USART5_CLK_ENABLE();
- obj_s->index = IndexNumber;
}
- IndexNumber++;
#endif
#if defined(USART6_BASE)
@@ -127,9 +126,7 @@
__HAL_RCC_USART6_FORCE_RESET();
__HAL_RCC_USART6_RELEASE_RESET();
__HAL_RCC_USART6_CLK_ENABLE();
- obj_s->index = IndexNumber;
}
- IndexNumber++;
#endif
#if defined(UART7_BASE)
@@ -137,9 +134,7 @@
__HAL_RCC_UART7_FORCE_RESET();
__HAL_RCC_UART7_RELEASE_RESET();
__HAL_RCC_UART7_CLK_ENABLE();
- obj_s->index = IndexNumber;
}
- IndexNumber++;
#endif
#if defined(USART7_BASE)
@@ -147,9 +142,7 @@
__HAL_RCC_USART7_FORCE_RESET();
__HAL_RCC_USART7_RELEASE_RESET();
__HAL_RCC_USART7_CLK_ENABLE();
- obj_s->index = IndexNumber;
}
- IndexNumber++;
#endif
#if defined(UART8_BASE)
@@ -157,9 +150,7 @@
__HAL_RCC_UART8_FORCE_RESET();
__HAL_RCC_UART8_RELEASE_RESET();
__HAL_RCC_UART8_CLK_ENABLE();
- obj_s->index = IndexNumber;
}
- IndexNumber++;
#endif
#if defined(USART8_BASE)
@@ -167,9 +158,7 @@
__HAL_RCC_USART8_FORCE_RESET();
__HAL_RCC_USART8_RELEASE_RESET();
__HAL_RCC_USART8_CLK_ENABLE();
- obj_s->index = IndexNumber;
}
- IndexNumber++;
#endif
#if defined(UART9_BASE)
@@ -177,9 +166,7 @@
__HAL_RCC_UART9_FORCE_RESET();
__HAL_RCC_UART9_RELEASE_RESET();
__HAL_RCC_UART9_CLK_ENABLE();
- obj_s->index = IndexNumber;
}
- IndexNumber++;
#endif
#if defined(UART10_BASE)
@@ -187,22 +174,21 @@
__HAL_RCC_UART10_FORCE_RESET();
__HAL_RCC_UART10_RELEASE_RESET();
__HAL_RCC_UART10_CLK_ENABLE();
- obj_s->index = IndexNumber;
}
- IndexNumber++;
#endif
-
#if defined(LPUART1_BASE)
if (obj_s->uart == LPUART_1) {
__HAL_RCC_LPUART1_FORCE_RESET();
__HAL_RCC_LPUART1_RELEASE_RESET();
__HAL_RCC_LPUART1_CLK_ENABLE();
- obj_s->index = IndexNumber;
}
- IndexNumber++;
#endif
+ // Assign serial object index
+ obj_s->index = get_uart_index(obj_s->uart);
+ MBED_ASSERT(obj_s->index >= 0);
+
// Configure UART pins
pinmap_pinout(tx, PinMap_UART_TX);
pinmap_pinout(rx, PinMap_UART_RX);
@@ -216,7 +202,7 @@
// Configure UART
obj_s->baudrate = 9600; // baudrate default value
- if (obj_s->uart == STDIO_UART) {
+ if (stdio_config) {
#if MBED_CONF_PLATFORM_STDIO_BAUD_RATE
obj_s->baudrate = MBED_CONF_PLATFORM_STDIO_BAUD_RATE; // baudrate takes value from platform/mbed_lib.json
#endif /* MBED_CONF_PLATFORM_STDIO_BAUD_RATE */
@@ -239,8 +225,8 @@
init_uart(obj); /* init_uart will be called again in serial_baud function, so don't worry if init_uart returns HAL_ERROR */
- // For stdio management
- if (obj_s->uart == STDIO_UART) { // STDIO_UART defined in PeripheralNames.h
+ // For stdio management in platform/mbed_board.c and platform/mbed_retarget.cpp
+ if (stdio_config) {
stdio_uart_inited = 1;
memcpy(&stdio_uart, obj, sizeof(serial_t));
}
@@ -413,38 +399,6 @@
}
}
-HAL_StatusTypeDef init_uart(serial_t *obj)
-{
- struct serial_s *obj_s = SERIAL_S(obj);
- UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
- huart->Instance = (USART_TypeDef *)(obj_s->uart);
-
- huart->Init.BaudRate = obj_s->baudrate;
- huart->Init.WordLength = obj_s->databits;
- huart->Init.StopBits = obj_s->stopbits;
- huart->Init.Parity = obj_s->parity;
-#if DEVICE_SERIAL_FC
- huart->Init.HwFlowCtl = obj_s->hw_flow_ctl;
-#else
- huart->Init.HwFlowCtl = UART_HWCONTROL_NONE;
-#endif
- huart->Init.OverSampling = UART_OVERSAMPLING_16;
- huart->TxXferCount = 0;
- huart->TxXferSize = 0;
- huart->RxXferCount = 0;
- huart->RxXferSize = 0;
-
- if (obj_s->pin_rx == NC) {
- huart->Init.Mode = UART_MODE_TX;
- } else if (obj_s->pin_tx == NC) {
- huart->Init.Mode = UART_MODE_RX;
- } else {
- huart->Init.Mode = UART_MODE_TX_RX;
- }
-
- return HAL_UART_Init(huart);
-}
-
void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)
{
struct serial_s *obj_s = SERIAL_S(obj);
@@ -464,11 +418,17 @@
}
switch (data_bits) {
- case 9:
- MBED_ASSERT(parity == UART_PARITY_NONE);
- obj_s->databits = UART_WORDLENGTH_9B;
+ case 7:
+ if (parity != UART_PARITY_NONE) {
+ obj_s->databits = UART_WORDLENGTH_8B;
+ } else {
+#if defined UART_WORDLENGTH_7B
+ obj_s->databits = UART_WORDLENGTH_7B;
+#else
+ error("7-bit data format without parity is not supported");
+#endif
+ }
break;
- default:
case 8:
if (parity != UART_PARITY_NONE) {
obj_s->databits = UART_WORDLENGTH_9B;
@@ -476,15 +436,16 @@
obj_s->databits = UART_WORDLENGTH_8B;
}
break;
-#if defined UART_WORDLENGTH_7B
- case 7:
+ case 9:
if (parity != UART_PARITY_NONE) {
- obj_s->databits = UART_WORDLENGTH_8B;
+ error("Parity is not supported with 9-bit data format");
} else {
- obj_s->databits = UART_WORDLENGTH_7B;
+ obj_s->databits = UART_WORDLENGTH_9B;
}
break;
-#endif
+ default:
+ error("Only 7, 8 or 9-bit data formats are supported");
+ break;
}
if (stop_bits == 2) {
@@ -533,4 +494,152 @@
(void)obj;
}
+/******************************************************************************
+ * UTILITY FUNCTIONS
+ ******************************************************************************/
+
+HAL_StatusTypeDef init_uart(serial_t *obj)
+{
+ struct serial_s *obj_s = SERIAL_S(obj);
+ UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
+ huart->Instance = (USART_TypeDef *)(obj_s->uart);
+
+ huart->Init.BaudRate = obj_s->baudrate;
+ huart->Init.WordLength = obj_s->databits;
+ huart->Init.StopBits = obj_s->stopbits;
+ huart->Init.Parity = obj_s->parity;
+#if DEVICE_SERIAL_FC
+ huart->Init.HwFlowCtl = obj_s->hw_flow_ctl;
+#else
+ huart->Init.HwFlowCtl = UART_HWCONTROL_NONE;
+#endif
+ huart->Init.OverSampling = UART_OVERSAMPLING_16;
+ huart->TxXferCount = 0;
+ huart->TxXferSize = 0;
+ huart->RxXferCount = 0;
+ huart->RxXferSize = 0;
+
+ if (obj_s->pin_rx == NC) {
+ huart->Init.Mode = UART_MODE_TX;
+ } else if (obj_s->pin_tx == NC) {
+ huart->Init.Mode = UART_MODE_RX;
+ } else {
+ huart->Init.Mode = UART_MODE_TX_RX;
+ }
+
+ return HAL_UART_Init(huart);
+}
+
+int8_t get_uart_index(UARTName uart_name)
+{
+ uint8_t index = 0;
+
+#if defined(USART1_BASE)
+ if (uart_name == UART_1) {
+ return index;
+ }
+ index++;
+#endif
+
+#if defined(USART2_BASE)
+ if (uart_name == UART_2) {
+ return index;
+ }
+ index++;
+#endif
+
+#if defined(USART3_BASE)
+ if (uart_name == UART_3) {
+ return index;
+ }
+ index++;
+#endif
+
+#if defined(UART4_BASE)
+ if (uart_name == UART_4) {
+ return index;
+ }
+ index++;
+#endif
+
+#if defined(USART4_BASE)
+ if (uart_name == UART_4) {
+ return index;
+ }
+ index++;
+#endif
+
+#if defined(UART5_BASE)
+ if (uart_name == UART_5) {
+ return index;
+ }
+ index++;
+#endif
+
+#if defined(USART5_BASE)
+ if (uart_name == UART_5) {
+ return index;
+ }
+ index++;
+#endif
+
+#if defined(USART6_BASE)
+ if (uart_name == UART_6) {
+ return index;
+ }
+ index++;
+#endif
+
+#if defined(UART7_BASE)
+ if (uart_name == UART_7) {
+ return index;
+ }
+ index++;
+#endif
+
+#if defined(USART7_BASE)
+ if (uart_name == UART_7) {
+ return index;
+ }
+ index++;
+#endif
+
+#if defined(UART8_BASE)
+ if (uart_name == UART_8) {
+ return index;
+ }
+ index++;
+#endif
+
+#if defined(USART8_BASE)
+ if (uart_name == UART_8) {
+ return index;
+ }
+ index++;
+#endif
+
+#if defined(UART9_BASE)
+ if (uart_name == UART_9) {
+ return index;
+ }
+ index++;
+#endif
+
+#if defined(UART10_BASE)
+ if (uart_name == UART_10) {
+ return index;
+ }
+ index++;
+#endif
+
+#if defined(LPUART1_BASE)
+ if (uart_name == LPUART_1) {
+ return index;
+ }
+ index++;
+#endif
+
+ return -1;
+}
+
#endif /* DEVICE_SERIAL */