STM32-i2c.109.rar_STM32 I2C_STM32 I2C_STM32的I2C_stm32 I2c应用_stm

#include"stm32f10x_lib.h" #include<stdio.h> void RCC_Configuration(void); void GPIO_Configuration(void); void NVIC_Configuration(void); void I2C_Configuration(void); u32 wait_event(u32 event); void send_start(void); void send_data(u8 data); void send_stop(void); u8 read_data(u8 add); void write_data(u8 add,u8 data); void write_page(u8 add,u8*data); void read_page(u8 add,u8*data); u8 data1; u8 tab1[8]; u8 tab[8]={0x01,0x02,0x03,0x04,0x05,0x06,0x07}; void delay(void); FlagStatus Usart_Send_Suceess; void Usart_Configuration(void); int main() { RCC_Configuration(); GPIO_Configuration(); NVIC_Configuration(); Usart_Configuration(); I2C_Configuration(); GPIO_WriteBit(GPIOD,GPIO_Pin_2,Bit_RESET); while(1) { //write_data(0x08,0x00); write_page(0x10,tab); delay(); read_page(0x10,tab1); printf("%d",tab1[4]); } } void RCC_Configuration() { ErrorStatus HSEStartUpStatus ; RCC_DeInit(); //将外设RCC寄存器重设为缺省值 /* Enable HSE */ RCC_HSEConfig(RCC_HSE_ON); //开启外部高速晶振（HSE） /* Wait till HSE is ready */ HSEStartUpStatus = RCC_WaitForHSEStartUp(); //等待HSE起振 if(HSEStartUpStatus == SUCCESS) //若成功起振，（下面为系统总线时钟设置） { /* Enable Prefetch Buffer */ FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); //使能FLASH预取指缓存 /* Flash 2 wait state */ FLASH_SetLatency(FLASH_Latency_1); //设置FLASH存储器延时时钟周期数(根据不同的系统时钟选取不同的值) /* HCLK = SYSCLK */ RCC_HCLKConfig(RCC_SYSCLK_Div1); //设置AHB时钟=72 MHz /* PCLK2 = HCLK/2 */ RCC_PCLK2Config(RCC_HCLK_Div2); //设置APB1时钟=36 MHz(APB1时钟最大值) /* PCLK1 = HCLK/2 */ RCC_PCLK1Config(RCC_HCLK_Div1); //设置APB2时钟=72 MHz /* Configure ADCCLK such as ADCCLK = PCLK2/2 */ RCC_ADCCLKConfig(RCC_PCLK2_Div2); //RCC_PCLK2_Div2,4,6,8 /* PLLCLK = 4MHz * 9 = 36 MHz */ RCC_PLLConfig(RCC_PLLSource_HSE_Div2, RCC_PLLMul_9); //PLL必须在其激活前完成配置（设置PLL时钟源及倍频系数） /* 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) { } RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA| RCC_APB2Periph_GPIOD|RCC_APB2Periph_GPIOC, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); /* GPIOB Periph clock enable */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); /* I2C1 Periph clock enable */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE); } } void GPIO_Configuration() { GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); 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); } void NVIC_Configuration() { #ifdef VECT_TAB_RAM NVIC_SetVectorTable(NVIC_VectTab_RAM,0x0); #else NVIC_SetVectorTable(NVIC_VectTab_FLASH,0x0); #endif } void Usart_Configuration() { USART_InitTypeDef USART_InitStructure; 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_Tx; USART_InitStructure.USART_Clock=USART_Clock_Disable; USART_InitStructure.USART_CPOL=USART_CPOL_Low; USART_InitStructure.USART_CPHA=USART_CPHA_2Edge; USART_InitStructure.USART_LastBit=USART_LastBit_Disable; USART_Init(USART1,&USART_InitStructure); USART_Cmd(USART1,ENABLE); } int fputc(int ch,FILE *f) { USART_SendData(USART1,(u8)ch); while(USART_GetFlagStatus(USART1,USART_FLAG_TC)==RESET) { } return ch; } void I2C_Configuration(void) { I2C_InitTypeDef I2C_InitStructure; I2C_InitStructure.I2C_Mode = I2C_Mode_I2C; I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2; I2C_InitStructure.I2C_OwnAddress1 = 0xff; I2C_InitStructure.I2C_Ack = I2C_Ack_Enable; I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit; I2C_InitStructure.I2C_ClockSpeed =50000; I2C_Cmd(I2C1, ENABLE); I2C_Init(I2C1, &I2C_InitStructure); } u32 wait_event(u32 event) { u32 i,j; for(i=100000;i>0;i--) { j=I2C1->SR1; if(j&event) { return 1; } } return 0; } void send_start() { I2C_GenerateSTART(I2C1, ENABLE); wait_event(I2C_FLAG_SB); I2C1->DR=0xa0; wait_event(I2C_FLAG_ADDR); I2C1->SR2; } void send_data(u8 data) { wait_event(I2C_FLAG_BTF); I2C1->DR=data; } void send_stop() { wait_event(I2C_FLAG_TXE); I2C_GenerateSTOP(I2C1, ENABLE); } u8 read_data(u8 add) { u8 data; I2C_AcknowledgeConfig(I2C1,DISABLE); send_start(); send_data(add); I2C_GenerateSTART(I2C1, ENABLE); wait_event(I2C_FLAG_SB); I2C1->DR=0xa1; wait_event(I2C_FLAG_ADDR); I2C1->SR2; wait_event(I2C_FLAG_RXNE); data=I2C1->DR; send_stop(); return data; } void write_data(u8 add,u8 data) { send_start(); send_data(add); send_data(data); send_stop(); } void delay() { u32 i; for(i=100000;i>0;i--); } void write_page(u8 add,u8*data) { u8 i; send_start(); send_data(add); for(i=0;i<8;i++) { send_data(*data); data++; } send_stop(); } void read_page(u8 add ,u8*data) { u8 i; I2C_AcknowledgeConfig(I2C1,ENABLE); send_start(); send_data(add); I2C_GenerateSTART(I2C1, ENABLE); wait_event(I2C_FLAG_SB); I2C1->DR=0xa1; wait_event(I2C_FLAG_ADDR); I2C1->SR2; for(i=0;i<7;i++) { wait_event(I2C_FLAG_BTF); *data=I2C1->DR; data++; } I2C_AcknowledgeConfig(I2C1,DISABLE); wait_event(I2C_FLAG_RXNE); *data=I2C1->DR; send_stop(); }