diff options
Diffstat (limited to 'src/stm32lib/examples/NVIC/DMA_WFIMode/main.c')
| -rwxr-xr-x | src/stm32lib/examples/NVIC/DMA_WFIMode/main.c | 352 |
1 files changed, 352 insertions, 0 deletions
diff --git a/src/stm32lib/examples/NVIC/DMA_WFIMode/main.c b/src/stm32lib/examples/NVIC/DMA_WFIMode/main.c new file mode 100755 index 0000000..130c0a8 --- /dev/null +++ b/src/stm32lib/examples/NVIC/DMA_WFIMode/main.c @@ -0,0 +1,352 @@ +/******************** (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 -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+#define USART1_DR_Address 0x40013804
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+NVIC_InitTypeDef NVIC_InitStructure;
+DMA_InitTypeDef DMA_InitStructure;
+
+vu32 LowPowerMode = 0;
+u16 DST_Buffer[10]= {0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+ErrorStatus HSEStartUpStatus;
+
+/* Private function prototypes -----------------------------------------------*/
+void RCC_Configuration(void);
+void GPIO_Configuration(void);
+void EXTI_Configuration(void);
+void DMA_Configuration(void);
+void USART_Configuration(void);
+u8 Buffercmp16(u16* pBuffer1, u16* pBuffer2, u16 BufferLength);
+void Delay(vu32 nCount);
+
+/* Private functions ---------------------------------------------------------*/
+
+/*******************************************************************************
+* Function Name : main
+* Description : Main program.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+int main(void)
+{
+#ifdef DEBUG
+ debug();
+#endif
+
+ /* Configure the system clocks */
+ RCC_Configuration();
+
+ /* Configure GPIOs */
+ GPIO_Configuration();
+
+ /* Configures the EXTI Lines */
+ EXTI_Configuration();
+
+ /* Configures the DMA Channel */
+ DMA_Configuration();
+
+ /* Configures the USART1 */
+ USART_Configuration();
+
+#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
+
+ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
+
+ /* Enable the DMA1 Channel 5 Interrupt */
+ NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel5_IRQChannel;
+ 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_IRQChannel;
+ NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
+ NVIC_Init(&NVIC_InitStructure);
+
+ while (1)
+ {
+ if(LowPowerMode == 1)
+ {
+
+ GPIO_ResetBits(GPIO_LED, GPIO_Pin_7 | GPIO_Pin_8);
+
+ /* Request to enter WFI mode */
+ __WFI();
+ LowPowerMode = 0;
+ }
+
+ Delay(0xFFFFF);
+ GPIO_WriteBit(GPIO_LED, GPIO_Pin_6, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIO_LED, GPIO_Pin_6)));
+ }
+}
+
+/*******************************************************************************
+* 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, GPIO_LED, GPIO_KEY_BUTTON and AFIO clocks */
+ RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA |
+ RCC_APB2Periph_GPIO_LED | RCC_APB2Periph_GPIO_KEY_BUTTON |
+ RCC_APB2Periph_AFIO, ENABLE);
+
+ /* DMA1 clock enable */
+ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
+}
+
+/*******************************************************************************
+* Function Name : GPIO_Configuration
+* Description : Configures the used GPIO pins.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void GPIO_Configuration(void)
+{
+ GPIO_InitTypeDef GPIO_InitStructure;
+
+ /* Configure GPIO_LED Pin 6, GPIO_LED Pin 7 and GPIO_LED Pin 8 as
+ Output push-pull */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 |GPIO_Pin_7 | GPIO_Pin_8;
+ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
+ GPIO_Init(GPIO_LED, &GPIO_InitStructure);
+
+ /* Configure USART1 Rx (PA.10) as input floating */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
+ GPIO_Init(GPIOA, &GPIO_InitStructure);
+
+ /* Configure GPIO KEY Button Pin as input floating */
+ GPIO_InitStructure.GPIO_Pin = GPIO_PIN_KEY_BUTTON;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
+ GPIO_Init(GPIO_KEY_BUTTON, &GPIO_InitStructure);
+}
+
+/*******************************************************************************
+* Function Name : EXTI_Configuration
+* Description : Configures the used EXTI line.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void EXTI_Configuration(void)
+{
+ EXTI_InitTypeDef EXTI_InitStructure;
+
+ /* Connect KEY Button EXTI Line to GPIO KEY Button Pin */
+ GPIO_EXTILineConfig(GPIO_PORT_SOURCE_KEY_BUTTON, GPIO_PIN_SOURCE_KEY_BUTTON);
+
+ /* Configure KEY Button EXTI Line to generate an interrupt on falling edge */
+ EXTI_InitStructure.EXTI_Line = EXTI_LINE_KEY_BUTTON;
+ EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
+ EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
+ EXTI_InitStructure.EXTI_LineCmd = ENABLE;
+ EXTI_Init(&EXTI_InitStructure);
+}
+
+/*******************************************************************************
+* Function Name : DMA_Configuration
+* Description : Configures the used DMA Channel.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void DMA_Configuration(void)
+{
+ DMA_InitTypeDef DMA_InitStructure;
+
+ /* DMA1 Channel5 Config */
+ DMA_DeInit(DMA1_Channel5);
+ DMA_InitStructure.DMA_PeripheralBaseAddr = USART1_DR_Address;
+ DMA_InitStructure.DMA_MemoryBaseAddr = (u32)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_Normal;
+ DMA_InitStructure.DMA_Priority = DMA_Priority_High;
+ DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
+ DMA_Init(DMA1_Channel5, &DMA_InitStructure);
+
+ /* Enable Channel5 Transfer complete interrupt */
+ DMA_ITConfig(DMA1_Channel5, DMA_IT_TC, ENABLE);
+
+ /* DMA1 Channel5 enable */
+ DMA_Cmd(DMA1_Channel5, ENABLE);
+}
+
+/*******************************************************************************
+* Function Name : USART_Configuration
+* Description : Configures the USART1.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void USART_Configuration(void)
+{
+ USART_InitTypeDef USART_InitStructure;
+
+/* USART1 configuration ------------------------------------------------------*/
+ /* USART1 configured as follow:
+ - BaudRate = 9600 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 = 9600;
+ 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;
+
+ USART_Init(USART1, &USART_InitStructure);
+
+ USART_DMACmd(USART1, USART_DMAReq_Rx, ENABLE);
+
+ /* Enable the USART1 */
+ USART_Cmd(USART1, ENABLE);
+}
+
+/*******************************************************************************
+* Function Name : Buffercmp16
+* Description : Compares two buffers.
+* Input : - pBuffer1, pBuffer2: buffers to be compared.
+* : - BufferLength: buffer's length
+* Output : None
+* Return : 0: pBuffer1 identical to pBuffer2
+* 1: pBuffer1 differs from pBuffer2
+*******************************************************************************/
+u8 Buffercmp16(u16* pBuffer1, u16* pBuffer2, u16 BufferLength)
+{
+ while(BufferLength--)
+ {
+ if(*pBuffer1 != *pBuffer2)
+ {
+ return 1;
+ }
+
+ pBuffer1++;
+ pBuffer2++;
+ }
+ return 0;
+}
+
+/*******************************************************************************
+* Function Name : Delay
+* Description : Inserts a delay time.
+* Input : nCount: specifies the delay time length.
+* Output : None
+* Return : None
+*******************************************************************************/
+void Delay(vu32 nCount)
+{
+ for(; nCount != 0; nCount--);
+}
+
+#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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