Use Proteus to simulate STM32 ultrasonic srf04 ranging! Code+Proteus

This post uses Proteus8.10, If the lower version cannot be opened, it can be drawn according to the schematic diagram （ It's simple ）
The model of single chip microcomputer is ：stm32f103 series
Use timer3. Stable operation , There is a deviation in the indication distance , Can be changed at the source .
If there is a problem , Comment area , See back ~

#include "sys.h"
#include "delay.h"
#include "led.h"
#include "key.h"
#include "timer.h"
int main(void)
{
    
    float SRF04_Value = 123.45;
    uint8_t adcxxx[3] = {
    0, 0, 0};
    HAL_Init();                             
    Stm32_Clock_Init(RCC_PLL_MUL9);   
    delay_init(72);                              
    LCD_init();                                       
    SRF04_init();
    TIM3_Init(1000-1, 72-1);           
    while(1)
    {
    
        SRF04_Value = Hcsr04GetLength();
        adcxxx[0] = (uint16_t)SRF04_Value / 100 + 48;
        adcxxx[1] = (uint16_t)SRF04_Value % 100 / 10 + 48;
        adcxxx[2] = (uint16_t)SRF04_Value % 100 % 10 + 48;
        LCD_write_string(1, 0, "Distance:");
        LCD_write_string(11, 0, (char*)adcxxx);           
    }
}