STM32 0.96寸 IIC 测速显示程序 -

#include "stm32f10x.h"
#include "bsp_usart.h"
#include "bsp_Timer.h"
#include "OLED_I2C.h"
#include "bsp_SysTick.h"
uint16_t t = 0;
double speed = 0 ;
uint16_t btime = 0;
int main(void)
{
double time;
double CLK;
unsigned char a[10];
USART_Config();
TIMER_Init();
SysTick_Init(); //初始化延迟函数
I2C_Configuration(); //配置CPU的硬件I2C
OLED_Init(); //初始化OLED
OLED_Fill(0xFF); //全屏点亮
Delay_s(2); // 2s
OLED_Fill(0x00); //全屏灭
Delay_s(2); // 2s
CLK = 72000000/(71+1);
printf("\r\n 测速 KEY1\n");
while (1)
{
if(TIM_ICUserStructure.Capture_FinishingFlag == 1 && t==50)
{
time=TIM_ICUserStructure.Capture_Period*(0xffff+1)+(TIM_ICUserStructure.Capture_CcrValue+1);
speed=1/((time/CLK)*20);
sprintf((char *)a,"%.2lf",speed);
printf("\r\n 测得一个脉冲时间 %f s 当前速度为 %f r/s\r\n",time/CLK,speed);
TIM_ICUserStructure.Capture_FinishingFlag = 0;
OLED_ShowStr(55,3,a,2); //测试8*16字符
t=0;
}
}
}

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