#include "stm32_eval.h" #include <stdio.h> #define VREF 3.3 EXTI_InitTypeDef EXTI_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; USART_InitTypeDef USART_InitStructure; USART_ClockInitTypeDef USART_ClockInitStructure; unsigned char i=0; unsigned char count=0; void delay_us(u32 n) { u8 j; while(n--) for(j=0;j<10;j++); } /*********************************/ void delay_ms(u32 n) { while(n--) delay_us(1000); } int Display[10]={ GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_8, GPIO_Pin_9|GPIO_Pin_12, GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_5, GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_5, GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_8|GPIO_Pin_5, GPIO_Pin_7|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_8|GPIO_Pin_5, GPIO_Pin_7|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_8|GPIO_Pin_5, GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12, GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14, GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14 }; void Dis_number(unsigned char i) { char one=0,ten=0; one=i%10; ten=i/10; GPIO_SetBits(GPIOB,GPIO_Pin_1); GPIO_ResetBits(GPIOB,Display[one]); delay_ms(10); GPIO_ResetBits(GPIOB,GPIO_Pin_1); GPIO_SetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14); GPIO_SetBits(GPIOB,GPIO_Pin_15); GPIO_ResetBits(GPIOB,Display[ten]); delay_ms(10); GPIO_ResetBits(GPIOB,GPIO_Pin_15); GPIO_SetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14); } void RCC_Configuration(void) { RCC_DeInit(); RCC_HSICmd(ENABLE); while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET); RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI); RCC_HSEConfig(RCC_HSE_OFF); RCC_LSEConfig(RCC_LSE_OFF); RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_9); //72HMz RCC_PLLCmd(ENABLE); while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET); RCC_ADCCLKConfig(RCC_PCLK2_Div4); RCC_PCLK2Config(RCC_HCLK_Div1); RCC_PCLK1Config(RCC_HCLK_Div2); RCC_HCLKConfig(RCC_SYSCLK_Div1); RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); while(RCC_GetSYSCLKSource() != 0x08); //SystemInit(); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE); GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE); GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOD, &GPIO_InitStructure); GPIO_ResetBits(GPIOD,GPIO_Pin_2);//蜂鸣器 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO, ENABLE); GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOC, &GPIO_InitStructure); GPIO_SetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7); RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); } void USART_int(long BaudRate) { RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE); 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); /* PA10 USART1_Rx */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); USART_InitStructure.USART_BaudRate = BaudRate;//?????? USART_InitStructure.USART_BaudRate = BaudRate;//usart传输波比特 USART_InitStructure.USART_WordLength = USART_WordLength_8b;//一帧传输或接收8bit USART_InitStructure.USART_StopBits = USART_StopBits_1;//在帧结尾传输1个停止位 USART_InitStructure.USART_Parity = USART_Parity_No;//奇偶失能 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//硬件流控制失能 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//接收使能,发送使能 USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;//时钟低电平活动 USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;//始终低电平 USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;//时钟第二边缘进行数据捕获 USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;//最后一位数据的时钟不从SCLK输出 USART_ClockInit(USART1, &USART_ClockInitStructure);//使能USART1时钟 USART_Init(USART1, &USART_InitStructure);//初始化USART1 USART_Cmd(USART1, ENABLE);//使能USART1外设 USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//使能中断 USART_Cmd(USART1, ENABLE); /* Configure four bit for preemption priority */ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4); /* Enable the USART1 Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 15; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } void GPIO_INIT() { RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOB, &GPIO_InitStructure); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOC, &GPIO_InitStructure); } void Iic1_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; I2C_InitTypeDef I2C_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE); //PB6-I2C2_SCL PB7-I2C2_SDA PB10-I2C2_SCL PB11-I2C2_SDA /* Configure IO connected to IIC*********************/ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD; GPIO_Init(GPIOB, &GPIO_InitStructure); I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;//配置I2C模式 I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;//该参数只有在I2C工作在快速模式下有意义 I2C_InitStructure.I2C_OwnAddress1 = 0xA0;//设置第一个设备自身地址 I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;//使能应答 I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;//地址为7位 I2C_InitStructure.I2C_ClockSpeed = 400000;//时钟速率 400KHZ I2C_Cmd(I2C2, ENABLE); I2C_Init(I2C2, &I2C_InitStructure); I2C_AcknowledgeConfig(I2C2, ENABLE); } void I2C2_WriteByte(unsigned char id,unsigned char write_address,unsigned char byte) { while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY)); I2C_GenerateSTART(I2C2,ENABLE); while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)); I2C_Send7bitAddress(I2C2,id,I2C_Direction_Transmitter); while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)); I2C_SendData(I2C2, write_address); while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); I2C_SendData(I2C2, byte); while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); I2C_GenerateSTOP(I2C2, ENABLE); do { /* Send START condition */ I2C_GenerateSTART(I2C2, ENABLE); /* Read I2C2 SR1 register */ /* Send EEPROM address for write */ I2C_Send7bitAddress(I2C2, 0xA0, I2C_Direction_Transmitter); }while(!(I2C_ReadRegister(I2C2, I2C_Register_SR1) & 0x0002)); /* Clear AF flag */ I2C_ClearFlag(I2C2, I2C_FLAG_AF); /* STOP condition */ I2C_GenerateSTOP(I2C2, ENABLE); } unsigned char I2C2_ReadByte(unsigned char id, unsigned char read_address) { unsigned char temp; while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY)){} I2C_GenerateSTART(I2C2, ENABLE); while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)); I2C_Send7bitAddress(I2C2, id, I2C_Direction_Transmitter); while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)); I2C_Cmd(I2C2, ENABLE); I2C_SendData(I2C2, read_address); while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); I2C_GenerateSTART(I2C2, ENABLE); while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)); I2C_Send7bitAddress(I2C2, id, I2C_Direction_Receiver); while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)); I2C_AcknowledgeConfig(I2C2, DISABLE); I2C_GenerateSTOP(I2C2, ENABLE); while(!(I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED))); temp = I2C_ReceiveData(I2C2); I2C_AcknowledgeConfig(I2C2, ENABLE); return temp; } void EXTIkeyS1_Config(void) { /* Enable GPIOA clock */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); /* Configure PA.00 pin as input floating */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); /* Enable AFIO clock */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); /* Connect EXTI0 Line to PA.00 pin */ GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource8); /* Configure EXTI0 line */ EXTI_InitStructure.EXTI_Line = EXTI_Line8; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); /* Enable and set EXTI0 Interrupt to the lowest priority */ NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } void EXTI9_5_IRQHandler(void) //s1 { if(EXTI_GetITStatus(EXTI_Line8) != RESET) { i++; I2C2_WriteByte(0xA0,0,i); EXTI_ClearITPendingBit(EXTI_Line8); } } int main(void) { RCC_Configuration(); USART_int(115200); GPIO_INIT(); Iic1_Init(); EXTIkeyS1_Config(); printf(" config done...\r\n"); delay_ms(1000); while(1) { count=I2C2_ReadByte(0xA0,0); Dis_number(count); } } #ifdef USE_FULL_ASSERT void assert_failed(uint8_t* file, uint32_t line) { while (1) { } } #endif #ifdef __GNUC__ #define PUTCHAR_PROTOTYPE int __io_putchar(int ch) #else #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f) #endif /* __GNUC__ */ PUTCHAR_PROTOTYPE { /* Place your implementation of fputc here */ /* e.g. write a character to the USART */ USART_SendData(EVAL_COM1, (uint8_t) ch); /* Loop until the end of transmission */ while (USART_GetFlagStatus(EVAL_COM1, USART_FLAG_TC) == RESET) {} return ch; } #ifdef USE_FULL_ASSERT void assert_failed(uint8_t* file, uint32_t line) { while (1) { } } #endif