diff options
Diffstat (limited to 'src/stm32lib/examples/DMA/I2C_RAM/main.c')
| -rwxr-xr-x | src/stm32lib/examples/DMA/I2C_RAM/main.c | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/src/stm32lib/examples/DMA/I2C_RAM/main.c b/src/stm32lib/examples/DMA/I2C_RAM/main.c new file mode 100755 index 0000000..5ef5d04 --- /dev/null +++ b/src/stm32lib/examples/DMA/I2C_RAM/main.c @@ -0,0 +1,305 @@ +/******************** (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"
+
+/* Private typedef -----------------------------------------------------------*/
+typedef enum { FAILED = 0, PASSED = !FAILED} TestStatus;
+
+/* Private define ------------------------------------------------------------*/
+#define I2C1_DR_Address 0x40005410
+#define I2C2_DR_Address 0x40005810
+#define I2C1_SLAVE_ADDRESS7 0x30
+#define I2C2_SLAVE_ADDRESS7 0x30
+#define BufferSize 8
+#define ClockSpeed 100000
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+I2C_InitTypeDef I2C_InitStructure;
+DMA_InitTypeDef DMA_InitStructure;
+u8 I2C1_Buffer_Tx[BufferSize] = {1, 2, 3, 4, 5, 6, 7, 8};
+u8 I2C2_Buffer_Rx[BufferSize];
+u8 Tx_Idx = 0, Rx_Idx = 0;
+volatile TestStatus TransferStatus;
+ErrorStatus HSEStartUpStatus;
+
+/* Private function prototypes -----------------------------------------------*/
+void RCC_Configuration(void);
+void GPIO_Configuration(void);
+void NVIC_Configuration(void);
+TestStatus Buffercmp(u8* pBuffer, u8* pBuffer1, 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();
+
+ /* DMA1 channel5 configuration ----------------------------------------------*/
+ DMA_DeInit(DMA1_Channel5);
+ DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)I2C2_DR_Address;
+ DMA_InitStructure.DMA_MemoryBaseAddr = (u32)I2C2_Buffer_Rx;
+ DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
+ DMA_InitStructure.DMA_BufferSize = BufferSize;
+ DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
+ DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
+ DMA_InitStructure.DMA_PeripheralDataSize = DMA_MemoryDataSize_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(DMA1_Channel5, &DMA_InitStructure);
+
+ /* DMA1 channel6 configuration ----------------------------------------------*/
+ DMA_DeInit(DMA1_Channel6);
+ DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)I2C1_DR_Address;
+ DMA_InitStructure.DMA_MemoryBaseAddr = (u32)I2C1_Buffer_Tx;
+ DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
+ DMA_InitStructure.DMA_Priority = DMA_Priority_High;
+ DMA_Init(DMA1_Channel6, &DMA_InitStructure);
+
+ /* Enable I2C1 and I2C2 ----------------------------------------------------*/
+ I2C_Cmd(I2C1, ENABLE);
+ I2C_Cmd(I2C2, ENABLE);
+
+ /* I2C1 configuration ------------------------------------------------------*/
+ I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
+ I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
+ I2C_InitStructure.I2C_OwnAddress1 = I2C1_SLAVE_ADDRESS7;
+ I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
+ I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
+ I2C_InitStructure.I2C_ClockSpeed = ClockSpeed;
+ I2C_Init(I2C1, &I2C_InitStructure);
+ /* I2C2 configuration ------------------------------------------------------*/
+ I2C_InitStructure.I2C_OwnAddress1 = I2C2_SLAVE_ADDRESS7;
+ I2C_Init(I2C2, &I2C_InitStructure);
+
+ /*----- Transmission Phase -----*/
+ /* Send I2C1 START condition */
+ I2C_GenerateSTART(I2C1, ENABLE);
+ /* Test on I2C1 EV5 and clear it */
+ while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
+ /* Send I2C2 slave Address for write */
+ I2C_Send7bitAddress(I2C1, I2C2_SLAVE_ADDRESS7, I2C_Direction_Transmitter);
+ /* Test on I2C2 EV1 and clear it */
+ while(!I2C_CheckEvent(I2C2, I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED));
+ /* Test on I2C1 EV6 and clear it */
+ while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
+
+ /* Enable I2C2 DMA */
+ I2C_DMACmd(I2C2, ENABLE);
+ /* Enable I2C1 DMA */
+ I2C_DMACmd(I2C1, ENABLE);
+
+ /* Enable DMA1 Channel5 */
+ DMA_Cmd(DMA1_Channel5, ENABLE);
+ /* Enable DMA1 Channel6 */
+ DMA_Cmd(DMA1_Channel6, ENABLE);
+
+ /* DMA1 Channel5 transfer complete test */
+ while(!DMA_GetFlagStatus(DMA1_FLAG_TC5));
+ /* DMA1 Channel6 transfer complete test */
+ while(!DMA_GetFlagStatus(DMA1_FLAG_TC6));
+
+ /* Send I2C1 STOP Condition */
+ I2C_GenerateSTOP(I2C1, ENABLE);
+ /* Test on I2C2 EV4 */
+ while(!I2C_CheckEvent(I2C2, I2C_EVENT_SLAVE_STOP_DETECTED));
+ /* Clear I2C2 STOPF flag */
+ I2C_ClearFlag(I2C2, I2C_FLAG_STOPF);
+
+ /* Check if the transmitted and received data are equal */
+ TransferStatus = Buffercmp(I2C1_Buffer_Tx, I2C2_Buffer_Rx, BufferSize);
+ /* TransferStatus = PASSED, if the transmitted and received data
+ are the same */
+ /* TransferStatus = FAILED, if the transmitted and received data
+ 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 DMA1 clock */
+ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
+ /* Enable GPIOB clock */
+ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
+ /* Enable I2C1 and I2C2 clock */
+ RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1 | RCC_APB1Periph_I2C2, 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;
+
+ /* Configure I2C1 pins: SCL and SDA */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
+ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
+ GPIO_Init(GPIOB, &GPIO_InitStructure);
+
+ /* Configure I2C2 pins: SCL and SDA */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;
+ GPIO_Init(GPIOB, &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 : - pBuffer, pBuffer1: buffers to be compared.
+* : - BufferLength: buffer's length
+* Output : None
+* Return : PASSED: pBuffer identical to pBuffer1
+* FAILED: pBuffer differs from pBuffer1
+*******************************************************************************/
+TestStatus Buffercmp(u8* pBuffer, u8* pBuffer1, u16 BufferLength)
+{
+ while(BufferLength--)
+ {
+ if(*pBuffer != *pBuffer1)
+ {
+ return FAILED;
+ }
+
+ pBuffer++;
+ pBuffer1++;
+ }
+
+ 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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