嵌入式读写EEPROM、定时器设定

1、iic读写EEPROM这个要自己写哦、没有参考

uint8_t e2prom_read(uint8_t address) { unsigned char val; I2CStart(); I2CSendByte(0xa0); I2CWaitAck(); I2CSendByte(address); I2CWaitAck(); I2CStart(); I2CSendByte(0xa1); I2CWaitAck(); val = I2CReceiveByte(); I2CWaitAck(); I2CStop(); return(val); } void  e2prom_write(unsigned char address,unsigned char info) { I2CStart(); I2CSendByte(0xa0); I2CWaitAck(); I2CSendByte(address); I2CWaitAck(); I2CSendByte(info); I2CWaitAck(); I2CStop(); } 

2、主程序调用
千万记得i2c_init（）；

i2c_init(); temp = e2prom_read(0xff); Delay_Ms(2); e2prom_write(0xff,++temp); Delay_Ms(2); sprintf(str1,"%s%d","ADDR:0xFF,VAL:",temp); LCD_DisplayStringLine(Line6,str1); 

二、定时器计时
1、复制嵌入式设计与开发\STM32固件库v3.5\STM32F10x_StdPeriph_Lib_V3.5.0\Project\STM32F10x_StdPeriph_Examples\TIM\TimeBase\main

int main(void) { /*!< At this stage the microcontroller clock setting is already configured, 
       this is done through SystemInit() function which is called from startup
       file (startup_stm32f10x_xx.s) before to branch to application main.
       To reconfigure the default setting of SystemInit() function, refer to
       system_stm32f10x.c file
     */ /* System Clocks Configuration */ RCC_Configuration(); /* NVIC Configuration */ NVIC_Configuration(); /* GPIO Configuration */ GPIO_Configuration(); /* ---------------------------------------------------------------
    TIM2 Configuration: Output Compare Timing Mode:
    TIM2 counter clock at 6 MHz
    CC1 update rate = TIM2 counter clock / CCR1_Val = 146.48 Hz
    CC2 update rate = TIM2 counter clock / CCR2_Val = 219.7 Hz
    CC3 update rate = TIM2 counter clock / CCR3_Val = 439.4 Hz
    CC4 update rate = TIM2 counter clock / CCR4_Val = 878.9 Hz
  --------------------------------------------------------------- */ /* Compute the prescaler value */ PrescalerValue = (uint16_t) (SystemCoreClock / 12000000) - 1; /* Time base configuration */ TIM_TimeBaseStructure.TIM_Period = 65535; TIM_TimeBaseStructure.TIM_Prescaler = 0; TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); /* Prescaler configuration */ TIM_PrescalerConfig(TIM2, PrescalerValue, TIM_PSCReloadMode_Immediate); /* Output Compare Timing Mode configuration: Channel1 */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Timing; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = CCR1_Val; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; TIM_OC1Init(TIM2, &TIM_OCInitStructure); TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Disable); /* Output Compare Timing Mode configuration: Channel2 */ TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = CCR2_Val; TIM_OC2Init(TIM2, &TIM_OCInitStructure); TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Disable); /* Output Compare Timing Mode configuration: Channel3 */ TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = CCR3_Val; TIM_OC3Init(TIM2, &TIM_OCInitStructure); TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Disable); /* Output Compare Timing Mode configuration: Channel4 */ TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = CCR4_Val; TIM_OC4Init(TIM2, &TIM_OCInitStructure); TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Disable); /* TIM IT enable */ TIM_ITConfig(TIM2, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4, ENABLE); /* TIM2 enable counter */ TIM_Cmd(TIM2, ENABLE); while (1); } 

和

更改删除、

void time2_init(void) { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); /* Time base configuration */ TIM_TimeBaseStructure.TIM_Period = 65535; TIM_TimeBaseStructure.TIM_Prescaler = 0; TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE); NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; //TIM3?D??
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //?è??ó??è??0??
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //′óó??è??3??
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQí¨μà±?ê1?ü
	NVIC_Init(&NVIC_InitStructure); //?ù?YNVIC_InitStruct?D???¨μ?2?êy3?ê??ˉíaéèNVIC??′??÷ /* TIM2 enable counter */ TIM_Cmd(TIM2, ENABLE); } 

2\stm32f10x_it.c复制中断函数

 ```cpp
void TIM2_IRQHandler(void) { if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET) { TIM_ClearITPendingBit(TIM2, TIM_IT_CC1); /* Pin PC.06 toggling with frequency = 73.24 Hz */ GPIO_WriteBit(GPIOC, GPIO_Pin_6, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOC, GPIO_Pin_6))); capture = TIM_GetCapture1(TIM2); TIM_SetCompare1(TIM2, capture + CCR1_Val); } else if (TIM_GetITStatus(TIM2, TIM_IT_CC2) != RESET) { TIM_ClearITPendingBit(TIM2, TIM_IT_CC2); /* Pin PC.07 toggling with frequency = 109.8 Hz */ GPIO_WriteBit(GPIOC, GPIO_Pin_7, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOC, GPIO_Pin_7))); capture = TIM_GetCapture2(TIM2); TIM_SetCompare2(TIM2, capture + CCR2_Val); } else if (TIM_GetITStatus(TIM2, TIM_IT_CC3) != RESET) { TIM_ClearITPendingBit(TIM2, TIM_IT_CC3); /* Pin PC.08 toggling with frequency = 219.7 Hz */ GPIO_WriteBit(GPIOC, GPIO_Pin_8, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOC, GPIO_Pin_8))); capture = TIM_GetCapture3(TIM2); TIM_SetCompare3(TIM2, capture + CCR3_Val); } else { TIM_ClearITPendingBit(TIM2, TIM_IT_CC4); /* Pin PC.09 toggling with frequency = 439.4 Hz */ GPIO_WriteBit(GPIOC, GPIO_Pin_9, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOC, GPIO_Pin_9))); capture = TIM_GetCapture4(TIM2); TIM_SetCompare4(TIM2, capture + CCR4_Val); } } 

更改为

void TIM2_IRQHandler(void) { static u16 key_count=0; if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) { TIM_ClearITPendingBit(TIM2, TIM_IT_Update); led_count++; if(led_count==4000) { led_count=0; led_flag=!led_flag; } } }} 

主函数调用：

 if (led_flag) { led_control(GPIO_Pin_9,1); Delay_Ms(1000); led_all(); } else { led_control(GPIO_Pin_9,0); Delay_Ms(1000); led_all(); } 

本文地址：https://blog.csdn.net/qq_43543515/article/details/107917990