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view libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/USART/DMA_Polling/main.c @ 8:58d76cf522ff
Split out code into separate files.
author | Daniel O'Connor <darius@dons.net.au> |
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date | Sat, 04 Feb 2012 13:29:31 +1030 |
parents | c59513fd84fb |
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/** ****************************************************************************** * @file USART/DMA_Polling/main.c * @author MCD Application Team * @version V3.5.0 * @date 08-April-2011 * @brief Main program body ****************************************************************************** * @attention * * 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. * * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2> ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "stm32f10x.h" #include "platform_config.h" /** @addtogroup STM32F10x_StdPeriph_Examples * @{ */ /** @addtogroup USART_DMA_Polling * @{ */ /* 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; uint8_t TxBuffer1[] = "USART DMA Polling: USARTy -> USARTz using DMA"; uint8_t TxBuffer2[] = "USART DMA Polling: USARTz -> USARTy using DMA"; uint8_t RxBuffer1[TxBufferSize2]; uint8_t RxBuffer2[TxBufferSize1]; volatile TestStatus TransferStatus1 = FAILED; volatile TestStatus TransferStatus2 = FAILED; /* Private function prototypes -----------------------------------------------*/ void RCC_Configuration(void); void GPIO_Configuration(void); void DMA_Configuration(void); TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength); /* Private functions ---------------------------------------------------------*/ /** * @brief Main program * @param None * @retval None */ int main(void) { /*!< At this stage the microcontroller clock setting is already configured, this is done through SystemInit() function which is called from startup file (startup_stm32f10x_xx.s) before to branch to application main. To reconfigure the default setting of SystemInit() function, refer to system_stm32f10x.c file */ /* System Clocks Configuration */ RCC_Configuration(); /* Configure the GPIO ports */ GPIO_Configuration(); /* Configure the DMA */ DMA_Configuration(); /* USARTy and USARTz configuration ------------------------------------------------------*/ /* USARTy and USARTz 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 USARTy */ USART_Init(USARTy, &USART_InitStructure); /* Configure USARTz */ USART_Init(USARTz, &USART_InitStructure); /* Enable USARTy DMA Rx and TX request */ USART_DMACmd(USARTy, USART_DMAReq_Rx | USART_DMAReq_Tx, ENABLE); /* Enable USARTz DMA Rx and TX request */ USART_DMACmd(USARTz, USART_DMAReq_Rx | USART_DMAReq_Tx, ENABLE); /* Enable USARTy TX DMA1 Channel */ DMA_Cmd(USARTy_Tx_DMA_Channel, ENABLE); /* Enable USARTy RX DMA1 Channel */ DMA_Cmd(USARTy_Rx_DMA_Channel, ENABLE); /* Enable USARTz TX DMA1 Channel */ DMA_Cmd(USARTz_Tx_DMA_Channel, ENABLE); /* Enable USARTz RX DMA1 Channel */ DMA_Cmd(USARTz_Rx_DMA_Channel, ENABLE); /* Enable the USARTy */ USART_Cmd(USARTy, ENABLE); /* Enable the USARTz */ USART_Cmd(USARTz, ENABLE); /* Wait until USARTy TX DMA1 Channel Transfer Complete */ while (DMA_GetFlagStatus(USARTy_Tx_DMA_FLAG) == RESET) { } /* Wait until USARTy RX DMA1 Channel Transfer Complete */ while (DMA_GetFlagStatus(USARTy_Rx_DMA_FLAG) == RESET) { } /* Wait until USARTz TX DMA1 Channel Transfer Complete */ while (DMA_GetFlagStatus(USARTz_Tx_DMA_FLAG) == RESET) { } /* Wait until USARTz RX DMA1 Channel Transfer Complete */ while (DMA_GetFlagStatus(USARTz_Rx_DMA_FLAG) == RESET) { } /* Check the received data with the send ones */ TransferStatus1 = Buffercmp(TxBuffer2, RxBuffer1, TxBufferSize2); /* TransferStatus1 = PASSED, if the data transmitted from USARTz and received by USARTy are the same */ /* TransferStatus1 = FAILED, if the data transmitted from USARTz and received by USARTy are different */ TransferStatus2 = Buffercmp(TxBuffer1, RxBuffer2, TxBufferSize1); /* TransferStatus2 = PASSED, if the data transmitted from USARTy and received by USARTz are the same */ /* TransferStatus2 = FAILED, if the data transmitted from USARTy and received by USARTz are different */ while (1) { } } /** * @brief Configures the different system clocks. * @param None * @retval None */ void RCC_Configuration(void) { /* DMA clock enable */ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); /* Enable GPIO clock */ RCC_APB2PeriphClockCmd(USARTy_GPIO_CLK | USARTz_GPIO_CLK | RCC_APB2Periph_AFIO, ENABLE); #ifndef USE_STM3210C_EVAL /* Enable USARTy Clock */ RCC_APB2PeriphClockCmd(USARTy_CLK, ENABLE); #else /* Enable USARTy Clock */ RCC_APB1PeriphClockCmd(USARTy_CLK, ENABLE); #endif /* Enable USARTz Clock */ RCC_APB1PeriphClockCmd(USARTz_CLK, ENABLE); } /** * @brief Configures the different GPIO ports. * @param None * @retval None */ void GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; #ifdef USE_STM3210C_EVAL /* Enable the USART3 Pins Software Remapping */ GPIO_PinRemapConfig(GPIO_PartialRemap_USART3, ENABLE); /* Enable the USART2 Pins Software Remapping */ GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE); #elif defined(USE_STM3210B_EVAL) || defined(USE_STM32100B_EVAL) /* Enable the USART2 Pins Software Remapping */ GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE); #endif /* Configure USARTy Rx as input floating */ GPIO_InitStructure.GPIO_Pin = USARTy_RxPin; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(USARTy_GPIO, &GPIO_InitStructure); /* Configure USARTz Rx as input floating */ GPIO_InitStructure.GPIO_Pin = USARTz_RxPin; GPIO_Init(USARTz_GPIO, &GPIO_InitStructure); /* Configure USARTy Tx as alternate function push-pull */ GPIO_InitStructure.GPIO_Pin = USARTy_TxPin; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(USARTy_GPIO, &GPIO_InitStructure); /* Configure USARTz Tx as alternate function push-pull */ GPIO_InitStructure.GPIO_Pin = USARTz_TxPin; GPIO_Init(USARTz_GPIO, &GPIO_InitStructure); } /** * @brief Configures the DMA. * @param None * @retval None */ void DMA_Configuration(void) { DMA_InitTypeDef DMA_InitStructure; /* USARTy TX DMA1 Channel (triggered by USARTy Tx event) Config */ DMA_DeInit(USARTy_Tx_DMA_Channel); DMA_InitStructure.DMA_PeripheralBaseAddr = USARTy_DR_Base; DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)TxBuffer1; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; DMA_InitStructure.DMA_BufferSize = TxBufferSize1; DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh; DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; DMA_Init(USARTy_Tx_DMA_Channel, &DMA_InitStructure); /* USARTy RX DMA1 Channel (triggered by USARTy Rx event) Config */ DMA_DeInit(USARTy_Rx_DMA_Channel); DMA_InitStructure.DMA_PeripheralBaseAddr = USARTy_DR_Base; DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)RxBuffer1; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; DMA_InitStructure.DMA_BufferSize = TxBufferSize2; DMA_Init(USARTy_Rx_DMA_Channel, &DMA_InitStructure); /* USARTz TX DMA1 Channel (triggered by USARTz Tx event) Config */ DMA_DeInit(USARTz_Tx_DMA_Channel); DMA_InitStructure.DMA_PeripheralBaseAddr = USARTz_DR_Base; DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)TxBuffer2; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; DMA_InitStructure.DMA_BufferSize = TxBufferSize2; DMA_Init(USARTz_Tx_DMA_Channel, &DMA_InitStructure); /* USARTz RX DMA1 Channel (triggered by USARTz Rx event) Config */ DMA_DeInit(USARTz_Rx_DMA_Channel); DMA_InitStructure.DMA_PeripheralBaseAddr = USARTz_DR_Base; DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)RxBuffer2; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; DMA_InitStructure.DMA_BufferSize = TxBufferSize1; DMA_Init(USARTz_Rx_DMA_Channel, &DMA_InitStructure); } /** * @brief Compares two buffers. * @param pBuffer1, pBuffer2: buffers to be compared. * @param BufferLength: buffer's length * @retval PASSED: pBuffer1 identical to pBuffer2 * FAILED: pBuffer1 differs from pBuffer2 */ TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength) { while(BufferLength--) { if(*pBuffer1 != *pBuffer2) { return FAILED; } pBuffer1++; pBuffer2++; } return PASSED; } #ifdef USE_FULL_ASSERT /** * @brief Reports the name of the source file and the source line number * where the assert_param error has occurred. * @param file: pointer to the source file name * @param line: assert_param error line source number * @retval None */ void assert_failed(uint8_t* file, uint32_t 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 2011 STMicroelectronics *****END OF FILE****/