diff options
Diffstat (limited to 'src/stm32lib/examples/I2C/Interrupt/main.c')
| -rwxr-xr-x | src/stm32lib/examples/I2C/Interrupt/main.c | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/src/stm32lib/examples/I2C/Interrupt/main.c b/src/stm32lib/examples/I2C/Interrupt/main.c new file mode 100755 index 0000000..2b8f2d7 --- /dev/null +++ b/src/stm32lib/examples/I2C/Interrupt/main.c @@ -0,0 +1,271 @@ +/******************** (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_SLAVE_ADDRESS7 0x30
+#define I2C2_SLAVE_ADDRESS7 0x30
+#define BufferSize 4
+#define ClockSpeed 200000
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+I2C_InitTypeDef I2C_InitStructure;
+u8 I2C1_Buffer_Tx[BufferSize] = {1,2,3,4};
+u8 I2C2_Buffer_Rx[BufferSize];
+vu8 Tx_Idx = 0, Rx_Idx = 0, PEC_Value = 0;
+volatile TestStatus TransferStatus = FAILED;
+ErrorStatus HSEStartUpStatus;
+
+/* Private functions ---------------------------------------------------------*/
+void RCC_Configuration(void);
+void GPIO_Configuration(void);
+void NVIC_Configuration(void);
+TestStatus Buffercmp(u8* pBuffer1, u8* pBuffer2, u16 BufferLength);
+
+/*******************************************************************************
+* 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();
+
+ /* GPIO configuration ------------------------------------------------------*/
+ GPIO_Configuration();
+
+ /* Enable I2C1 and I2C2 ----------------------------------------------------*/
+ I2C_Cmd(I2C1, ENABLE);
+ I2C_Cmd(I2C2, ENABLE);
+
+ /* Enable I2C1 and I2C2 event and buffer interrupt */
+ I2C_ITConfig(I2C1, I2C_IT_EVT | I2C_IT_BUF, ENABLE);
+ I2C_ITConfig(I2C2, I2C_IT_EVT | I2C_IT_BUF, 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);
+
+ /* Send data */
+ while(Rx_Idx < (BufferSize+1))
+ {
+ }
+
+ /* Check the corectness of written data */
+ TransferStatus = Buffercmp(I2C1_Buffer_Tx, I2C2_Buffer_Rx, BufferSize);
+ /* TransferStatus = PASSED, if the transmitted and received data
+ are equal */
+ /* 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 peripheral clocks --------------------------------------------------*/
+ /* Enable I2C1 and I2C2 clock */
+ RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1 | RCC_APB1Periph_I2C2, ENABLE);
+ /* Enable GPIOB clock */
+ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, 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 NVIC and Vector Table base location.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void NVIC_Configuration(void)
+{
+ NVIC_InitTypeDef NVIC_InitStructure;
+
+#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
+
+ /* 1 bit for pre-emption priority, 3 bits for subpriority */
+ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
+
+ /* Configure and enable I2C1 interrupt -------------------------------------*/
+ NVIC_InitStructure.NVIC_IRQChannel = I2C1_EV_IRQChannel;
+ NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
+ NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
+ NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
+ NVIC_Init(&NVIC_InitStructure);
+
+ /* Configure and enable I2C2 interrupt -------------------------------------*/
+ NVIC_InitStructure.NVIC_IRQChannel = I2C2_EV_IRQChannel;
+ NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
+ NVIC_Init(&NVIC_InitStructure);
+}
+
+/*******************************************************************************
+* Function Name : Buffercmp
+* Description : Compares two buffers.
+* Input : - pBuffer1, pBuffer2: buffers to be compared.
+* : - BufferLength: buffer's length
+* Output : None
+* Return : PASSED: pBuffer1 identical to pBuffer2
+* FAILED: pBuffer1 differs from pBuffer2
+*******************************************************************************/
+TestStatus Buffercmp(u8* pBuffer1, u8* pBuffer2, u16 BufferLength)
+{
+ while(BufferLength--)
+ {
+ if(*pBuffer1 != *pBuffer2)
+ {
+ return FAILED;
+ }
+
+ pBuffer1++;
+ pBuffer2++;
+ }
+
+ 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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