LCD显示中sprintf函数出错

xsq · 发表于 2019-2-18 12:34:50

                          sprintf((char*)string,"%s%.3f","ADC Value:",temp); LCD_DisplayStringLine(Line6,string);                                     //打印ADC转换的值

sprintf((char*)string1,"  %s%.3f","PA9:",100*(arr-PA9pwmout)/arr);
LCD_DisplayStringLine(Line7,string1);                                     //打印PA9引脚输出的PWM波占空比

sprintf((char*)string2," %s %.3f","PA9:",720000000/arr);
LCD_DisplayStringLine(Line8,string2);                                     //打印PWM波的频率

         想请教各位为什么LCD显示的三行都相同（都输出的是ADC的值）？？？？


完整的main函数如下

int main(void)
{
   float adcx;
   u8  string[20];    u8  string1[20];    u8  string2[20];
   float temp;
   u16    arr=7199;//71999(1kHZ)~~7199(10kHZ)  频率可调PWM波


   key_Init();
   Adc_Init();
   LED_Init();
   TIM1_PWM_Init(arr,0);//PWM波频率为  72000000/arr


//LCD显示
STM3210B_LCD_Init();//LCD初始化函数

LCD_Clear(White);
LCD_SetTextColor(Green);
LCD_SetBackColor(Red);

LCD_ClearLine(Line0);
LCD_ClearLine(Line1);
LCD_ClearLine(Line2);
LCD_ClearLine(Line3);
LCD_ClearLine(Line4);

LCD_DisplayStringLine(Line1,"    ADC DEMO    ");
LCD_DisplayStringLine(Line3,"  PB0-ADC channel 8 ");

LCD_SetTextColor(Black);
LCD_SetBackColor(White);

while(1)
{
u16 PA9pwmout;

            PA9pwmout=arr-(adcx*arr)/0xfff;       //占空比与ADC的关系
TIM_SetCompare2(TIM1,PA9pwmout); //改变CCR2的值，调节占空比

adcx=Get_Adc( ADC_Channel_8);
temp=adcx*(3.3/0xfff);

sprintf((char*)string,"%s%.3f","ADC Value:",temp);
LCD_DisplayStringLine(Line7,string);
sprintf((char*)string1," %s%.3f","PA9:",100*(arr-PA9pwmout)/arr);
LCD_DisplayStringLine(Line6,string1)；

sprintf((char*)string2," %s %.3f","PA9:",720000000/arr);
LCD_DisplayStringLine(Line8,string2);



}
}