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Diffstat (limited to 'src/stm32lib/examples/USART/HalfDuplex/main.c')
| -rwxr-xr-x | src/stm32lib/examples/USART/HalfDuplex/main.c | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/src/stm32lib/examples/USART/HalfDuplex/main.c b/src/stm32lib/examples/USART/HalfDuplex/main.c new file mode 100755 index 0000000..d37ce13 --- /dev/null +++ b/src/stm32lib/examples/USART/HalfDuplex/main.c @@ -0,0 +1,313 @@ +/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
+* File Name : main.c
+* Author : MCD Application Team
+* Version : V2.0.1
+* Date : 06/13/2008
+* Description : Main program body
+********************************************************************************
+* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
+* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
+* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
+* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
+* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
+* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
+*******************************************************************************/
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f10x_lib.h"
+#include "platform_config.h"
+
+/* Private typedef -----------------------------------------------------------*/
+typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;
+
+/* Private define ------------------------------------------------------------*/
+#define TxBufferSize1 (countof(TxBuffer1) - 1)
+#define TxBufferSize2 (countof(TxBuffer2) - 1)
+
+/* Private macro -------------------------------------------------------------*/
+#define countof(a) (sizeof(a) / sizeof(*(a)))
+
+/* Private variables ---------------------------------------------------------*/
+USART_InitTypeDef USART_InitStructure;
+u8 TxBuffer1[] = "USART Half Duplex: USART1 -> USART2 using HalfDuplex mode";
+u8 TxBuffer2[] = "USART Half Duplex: USART2 -> USART1 using HalfDuplex mode";
+u8 RxBuffer1[TxBufferSize2];
+u8 RxBuffer2[TxBufferSize1];
+u8 NbrOfDataToRead1 = TxBufferSize2;
+u8 NbrOfDataToRead2 = TxBufferSize1;
+u8 TxCounter1 = 0, RxCounter1 = 0;
+u8 TxCounter2 = 0, RxCounter2 = 0;
+volatile TestStatus TransferStatus1 = FAILED, TransferStatus2 = FAILED;
+ErrorStatus HSEStartUpStatus;
+
+/* Private function prototypes -----------------------------------------------*/
+void RCC_Configuration(void);
+void GPIO_Configuration(void);
+void NVIC_Configuration(void);
+TestStatus Buffercmp(u8* pBuffer1, u8* pBuffer2, u16 BufferLength);
+
+/* Private functions ---------------------------------------------------------*/
+
+/*******************************************************************************
+* Function Name : main
+* Description : Main program
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+int main(void)
+{
+#ifdef DEBUG
+ debug();
+#endif
+
+ /* System Clocks Configuration */
+ RCC_Configuration();
+
+ /* NVIC configuration */
+ NVIC_Configuration();
+
+ /* Configure the GPIO ports */
+ GPIO_Configuration();
+
+/* USART1 and USART2 configuration ------------------------------------------------------*/
+ /* USART1 and USART2 configured as follow:
+ - BaudRate = 230400 baud
+ - Word Length = 8 Bits
+ - One Stop Bit
+ - No parity
+ - Hardware flow control disabled (RTS and CTS signals)
+ - Receive and transmit enabled
+
+ */
+ USART_InitStructure.USART_BaudRate = 230400;
+ USART_InitStructure.USART_WordLength = USART_WordLength_8b;
+ USART_InitStructure.USART_StopBits = USART_StopBits_1;
+ USART_InitStructure.USART_Parity = USART_Parity_No;
+ USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
+ USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
+
+ /* Configure USART1 */
+ USART_Init(USART1, &USART_InitStructure);
+ /* Configure USART2 */
+ USART_Init(USART2, &USART_InitStructure);
+
+ /* Enable the USART1 */
+ USART_Cmd(USART1, ENABLE);
+ /* Enable the USART2 */
+ USART_Cmd(USART2, ENABLE);
+
+ /* Enable USART1 Half Duplex Mode*/
+ USART_HalfDuplexCmd(USART1, ENABLE);
+ /* Enable USART2 Half Duplex Mode*/
+ USART_HalfDuplexCmd(USART2, ENABLE);
+
+ while(NbrOfDataToRead2--)
+ {
+ /* Wait until end of transmit */
+ while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET)
+ {
+ }
+ /* Write one byte in the USART1 Transmit Data Register */
+ USART_SendData(USART1, TxBuffer1[TxCounter1++]);
+
+ /* Wait the byte is entirtly received by USART2 */
+ while(USART_GetFlagStatus(USART2, USART_FLAG_RXNE) == RESET)
+ {
+ }
+ /* Store the received byte in the RxBuffer2 */
+ RxBuffer2[RxCounter2++] = USART_ReceiveData(USART2);
+ }
+
+ /* Clear the USART1 Data Register */
+ USART_ReceiveData(USART1);
+
+ while(NbrOfDataToRead1--)
+ {
+ /* Wait until end of transmit */
+ while(USART_GetFlagStatus(USART2, USART_FLAG_TXE)== RESET)
+ {
+ }
+ /* Write one byte in the USART2 Transmit Data Register */
+ USART_SendData(USART2, TxBuffer2[TxCounter2++]);
+
+ /* Wait the byte is entirtly received by USART1 */
+ while(USART_GetFlagStatus(USART1,USART_FLAG_RXNE) == RESET)
+ {
+ }
+ /* Store the received byte in the RxBuffer1 */
+ RxBuffer1[RxCounter1++] = USART_ReceiveData(USART1);
+ }
+
+ /* Check the received data with the send ones */
+ TransferStatus1 = Buffercmp(TxBuffer1, RxBuffer2, TxBufferSize1);
+ /* TransferStatus = PASSED, if the data transmitted from USART1 and
+ received by USART2 are the same */
+ /* TransferStatus = FAILED, if the data transmitted from USART1 and
+ received by USART2 are different */
+ TransferStatus2 = Buffercmp(TxBuffer2, RxBuffer1, TxBufferSize2);
+ /* TransferStatus = PASSED, if the data transmitted from USART2 and
+ received by USART1 are the same */
+ /* TransferStatus = FAILED, if the data transmitted from USART2 and
+ received by USART1 are different */
+
+ while (1)
+ {
+ }
+}
+
+/*******************************************************************************
+* Function Name : RCC_Configuration
+* Description : Configures the different system clocks.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void RCC_Configuration(void)
+{
+ /* RCC system reset(for debug purpose) */
+ RCC_DeInit();
+
+ /* Enable HSE */
+ RCC_HSEConfig(RCC_HSE_ON);
+
+ /* Wait till HSE is ready */
+ HSEStartUpStatus = RCC_WaitForHSEStartUp();
+
+ if(HSEStartUpStatus == SUCCESS)
+ {
+ /* Enable Prefetch Buffer */
+ FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
+
+ /* Flash 2 wait state */
+ FLASH_SetLatency(FLASH_Latency_2);
+
+ /* HCLK = SYSCLK */
+ RCC_HCLKConfig(RCC_SYSCLK_Div1);
+
+ /* PCLK2 = HCLK */
+ RCC_PCLK2Config(RCC_HCLK_Div1);
+
+ /* PCLK1 = HCLK/2 */
+ RCC_PCLK1Config(RCC_HCLK_Div2);
+
+ /* PLLCLK = 8MHz * 9 = 72 MHz */
+ RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
+
+ /* Enable PLL */
+ RCC_PLLCmd(ENABLE);
+
+ /* Wait till PLL is ready */
+ while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
+ {
+ }
+
+ /* Select PLL as system clock source */
+ RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
+
+ /* Wait till PLL is used as system clock source */
+ while(RCC_GetSYSCLKSource() != 0x08)
+ {
+ }
+ }
+
+ /* Enable USART1, GPIOA, GPIOx and AFIO clocks */
+ RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA |RCC_APB2Periph_GPIOx
+ | RCC_APB2Periph_AFIO, ENABLE);
+ /* Enable USART2 clock */
+ RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
+}
+
+/*******************************************************************************
+* Function Name : GPIO_Configuration
+* Description : Configures the different GPIO ports.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void GPIO_Configuration(void)
+{
+ GPIO_InitTypeDef GPIO_InitStructure;
+
+#ifdef USE_STM3210B_EVAL
+ /* Enable the USART2 Pins Software Remapping */
+ GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
+#endif
+
+ /* Configure USART1 Tx (PA.09) as alternate function open-drain */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
+ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
+ GPIO_Init(GPIOA, &GPIO_InitStructure);
+
+ /* Configure USART2 Tx as alternate function open-drain */
+ GPIO_InitStructure.GPIO_Pin = GPIO_TxPin;
+ GPIO_Init(GPIOx, &GPIO_InitStructure);
+}
+
+/*******************************************************************************
+* Function Name : NVIC_Configuration
+* Description : Configures Vector Table base location.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void NVIC_Configuration(void)
+{
+#ifdef VECT_TAB_RAM
+ /* Set the Vector Table base location at 0x20000000 */
+ NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
+#else /* VECT_TAB_FLASH */
+ /* Set the Vector Table base location at 0x08000000 */
+ NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
+#endif
+}
+
+/*******************************************************************************
+* Function Name : Buffercmp
+* Description : Compares two buffers.
+* Input : - pBuffer1, pBuffer2: buffers to be compared.
+* : - BufferLength: buffer's length
+* Output : None
+* Return : PASSED: pBuffer1 identical to pBuffer2
+* FAILED: pBuffer1 differs from pBuffer2
+*******************************************************************************/
+TestStatus Buffercmp(u8* pBuffer1, u8* pBuffer2, u16 BufferLength)
+{
+ while(BufferLength--)
+ {
+ if(*pBuffer1 != *pBuffer2)
+ {
+ return FAILED;
+ }
+
+ pBuffer1++;
+ pBuffer2++;
+ }
+
+ return PASSED;
+}
+
+#ifdef DEBUG
+/*******************************************************************************
+* Function Name : assert_failed
+* Description : Reports the name of the source file and the source line number
+* where the assert_param error has occurred.
+* Input : - file: pointer to the source file name
+* - line: assert_param error line source number
+* Output : None
+* Return : None
+*******************************************************************************/
+void assert_failed(u8* file, u32 line)
+{
+ /* User can add his own implementation to report the file name and line number,
+ ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
+
+ /* Infinite loop */
+ while (1)
+ {
+ }
+}
+#endif
+
+/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
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