/**
******************************************************************************
* @file NVIC/DMA_WFIMode/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 "stm32_eval.h"
/** @addtogroup STM32F10x_StdPeriph_Examples
* @{
*/
/** @addtogroup NVIC_DMA_WFIMode
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#ifdef USE_STM3210C_EVAL
#define USARTy_DR_Address 0x40004404
#define USARTy_DMA1_Channel DMA1_Channel6
#define USARTy_DMA1_IRQn DMA1_Channel6_IRQn
#else
#define USARTy_DR_Address 0x40013804
#define USARTy_DMA1_Channel DMA1_Channel5
#define USARTy_DMA1_IRQn DMA1_Channel5_IRQn
#endif
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
NVIC_InitTypeDef NVIC_InitStructure;
USART_InitTypeDef USART_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
__IO uint32_t LowPowerMode = 0;
uint16_t DST_Buffer[10]= {0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void DMA_Configuration(void);
uint8_t Buffercmp16(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength);
void Delay(__IO uint32_t nCount);
/* 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
*/
/* Configure the system clocks */
RCC_Configuration();
/* Initialize Leds and Key Button mounted on STM3210X-EVAL board */
STM_EVAL_LEDInit(LED1);
STM_EVAL_LEDInit(LED2);
STM_EVAL_LEDInit(LED3);
STM_EVAL_LEDInit(LED4);
STM_EVAL_PBInit(BUTTON_KEY, BUTTON_MODE_EXTI);
/* Configures the DMA Channel */
DMA_Configuration();
/* EVAL_COM1 configuration ---------------------------------------------------*/
/* EVAL_COM1 configured as follow:
- BaudRate = 115200 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 = 115200;
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;
STM_EVAL_COMInit(COM1, &USART_InitStructure);
USART_DMACmd(EVAL_COM1, USART_DMAReq_Rx, ENABLE);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
/* Enable the USARTy_DMA1_IRQn Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USARTy_DMA1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable the EXTI9_5 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_Init(&NVIC_InitStructure);
while (1)
{
if(LowPowerMode == 1)
{
STM_EVAL_LEDOff(LED2);
STM_EVAL_LEDOff(LED3);
/* Request to enter WFI mode */
__WFI();
LowPowerMode = 0;
}
Delay(0xFFFFF);
STM_EVAL_LEDToggle(LED1);
}
}
/**
* @brief Configures the different system clocks
* @param None
* @retval None
*/
void RCC_Configuration(void)
{
/* DMA1 clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
}
/**
* @brief Configures the used DMA Channel.
* @param None
* @retval None
*/
void DMA_Configuration(void)
{
DMA_InitTypeDef DMA_InitStructure;
/* USARTy_DMA1_Channel Config */
DMA_DeInit(USARTy_DMA1_Channel);
DMA_InitStructure.DMA_PeripheralBaseAddr = USARTy_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)DST_Buffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 10;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(USARTy_DMA1_Channel, &DMA_InitStructure);
/* Enable USARTy_DMA1_Channel Transfer complete interrupt */
DMA_ITConfig(USARTy_DMA1_Channel, DMA_IT_TC, ENABLE);
/* USARTy_DMA1_Channel enable */
DMA_Cmd(USARTy_DMA1_Channel, ENABLE);
}
/**
* @brief Compares two buffers.
* @param pBuffer1, pBuffer2: buffers to be compared.
* @param BufferLength: buffer's length
* @retval 0: pBuffer1 identical to pBuffer2
* 1: pBuffer1 differs from pBuffer2
*/
uint8_t Buffercmp16(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength)
{
while(BufferLength--)
{
if(*pBuffer1 != *pBuffer2)
{
return 1;
}
pBuffer1++;
pBuffer2++;
}
return 0;
}
/**
* @brief Inserts a delay time.
* @param nCount: specifies the delay time length.
* @retval None
*/
void Delay(__IO uint32_t nCount)
{
for(; nCount != 0; nCount--);
}
#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****/