/**
******************************************************************************
* @file USART/DMA_Interrupt/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.
*
*
© COPYRIGHT 2011 STMicroelectronics
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "platform_config.h"
/** @addtogroup STM32F10x_StdPeriph_Examples
* @{
*/
/** @addtogroup USART_DMA_Interrupt
* @{
*/
/* 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 Interrupt: USARTy -> USARTz using DMA Tx and Rx Flag";
uint8_t TxBuffer2[] = "USART DMA Interrupt: USARTz -> USARTy using DMA Tx and Rx Interrupt";
uint8_t RxBuffer1[TxBufferSize2];
uint8_t RxBuffer2[TxBufferSize1];
uint8_t NbrOfDataToRead = TxBufferSize1;
uint32_t index = 0;
volatile TestStatus TransferStatus1 = FAILED, TransferStatus2 = FAILED;
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_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();
/* NVIC configuration */
NVIC_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 TX request */
USART_DMACmd(USARTy, USART_DMAReq_Tx, ENABLE);
/* Enable USARTz DMA TX request */
USART_DMACmd(USARTz, USART_DMAReq_Tx, ENABLE);
/* Enable the USARTz Receive Interrupt */
USART_ITConfig(USARTz, USART_IT_RXNE, ENABLE);
/* Enable USARTy */
USART_Cmd(USARTy, ENABLE);
/* Enable USARTz */
USART_Cmd(USARTz, ENABLE);
/* Enable USARTy DMA TX Channel */
DMA_Cmd(USARTy_Tx_DMA_Channel, ENABLE);
/* Enable USARTz DMA TX Channel */
DMA_Cmd(USARTz_Tx_DMA_Channel, ENABLE);
/* Receive the TxBuffer2 */
while(index < TxBufferSize2)
{
while(USART_GetFlagStatus(USARTy, USART_FLAG_RXNE) == RESET)
{
}
RxBuffer1[index++] = USART_ReceiveData(USARTy);
}
/* Wait until USARTy TX DMA1 Channel Transfer Complete */
while (DMA_GetFlagStatus(USARTy_Tx_DMA_FLAG) == RESET)
{
}
/* Wait until USARTz TX DMA1 Channel Transfer Complete */
while (DMA_GetFlagStatus(USARTz_Tx_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 nested vectored interrupt controller.
* @param None
* @retval None
*/
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable the USARTz Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USARTz_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/**
* @brief Configures the DMA.
* @param None
* @retval None
*/
void DMA_Configuration(void)
{
DMA_InitTypeDef DMA_InitStructure;
/* USARTy_Tx_DMA_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);
/* USARTz_Tx_DMA_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);
}
/**
* @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****/