STM8单片机电压表源程序 IAR环境 -

#include<iostm8s003f3.h>
unsigned int ms_count;
unsigned char adcflag;
unsigned int ADCData;
unsigned int tmpin;
unsigned int ADCBuff[3];
/*******************************************************************************
**函数名称：void GPIO_Init()
**功能描述：GPIO->功能引脚初始化
**入口参数：无
**输出：无
*******************************************************************************/
void GPIO_Init()
{
PA_ODR &=0xf1; //PA1,2,3置零
PA_DDR |=0x0e; //设置端口PA1,2,3的输入输出方向寄存器为输出方向
PA_CR1 |=0x0e; //PA1,2,3为推挽输出
PA_CR2 |=0x0e; //PA1,2,3是输出速度最快为10MHz
PB_ODR |=0x30; //灭PB4,5
PB_DDR |=0x30; //设置端口PB4,5的输入输出方向寄存器为输出方向
PB_CR1 |=0x30; //PB4,5为推挽输出
PB_CR2 |=0x30; //PB4,5是输出速度最快为10MHz
PC_ODR |=0xf8; //灭PC3,4,5,6,7
PC_DDR |=0xf8; //设置端口PC->3,4,5,6,7的输入输出方向寄存器为输出方向
PC_CR1 |=0xf8; //PC->3,4,5,6,7为推挽输出
PC_CR2 |=0xf8; //PC->3,4,5,6,7是输出速度最快为10MHz
PD_ODR |=0x02; //灭PD1
PA_ODR &=0xe3; //PD2,3,4置零
PD_DDR |=0x1e; //设置端口PD->1,2,3,4的输入输出方向寄存器为输出方向
PD_CR1 |=0x1e; //PD->1,2,3,4为推挽输出
PD_CR2 |=0x1e; //PD->1,2,3,4是输出速度最快为10MHz
}
/*******************************************************************************
**函数名称：void SMG_Display(int num)
**功能描述：SMG显示函数
**入口参数：int num
**输出：无
*******************************************************************************/
void SMG1_Display(unsigned char num)
{
switch(num)
{
case 0:
PA_ODR &=0xf1; //PA1,2,3置零
PB_ODR |=0x30; //PB4,5置高
PC_ODR |=0xf8; //PC3,4,5,6,7置高
PD_ODR |=0x02; //PD1置高
PB_ODR &=0xcf; //PB4,5置低a,e
PC_ODR &=0xa7; //PC3,4,6置低c,d,f
PD_ODR &=0xfd; //PD1置低b
//PA_ODR |=0x0e; //GIG1,2,3置高
//PD_ODR |=0x1c; //GIG2 2,3,4置高
break;
case 1:
PA_ODR &=0xf1; //PA1,2,3置零
PB_ODR |=0x30; //PB4,5置高
PC_ODR |=0xf8; //PC3,4,5,6,7置高
PD_ODR |=0x02; //PD1置高
//PB_ODR &=0xcf; //PB4,5置低a,e
PC_ODR &=0xbf; //PC6置低c
PD_ODR &=0xfd; //PD1置低b
//PA_ODR |=0x0e; //GIG1,2,3置高
//PD_ODR |=0x1c; //GIG2 2,3,4置高
break;
case 2:
PA_ODR &=0xf1; //PA1,2,3置零
PB_ODR |=0x30; //PB4,5置高
PC_ODR |=0xf8; //PC3,4,5,6,7置高
PD_ODR |=0x02; //PD1置高
PB_ODR &=0xcf; //PB4,5置低a,e
PC_ODR &=0x77; //PC3,7置低d,g
PD_ODR &=0xfd; //PD1置低b
//PA_ODR |=0x0e; //GIG1,2,3置高
//PD_ODR |=0x1c; //GIG2 2,3,4置高
break;
case 3:
PA_ODR &=0xf1; //PA1,2,3置零
PB_ODR |=0x30; //PB4,5置高
PC_ODR |=0xf8; //PC3,4,5,6,7置高
PD_ODR |=0x02; //PD1置高
PB_ODR &=0xef; //PB4置低a
PC_ODR &=0x37; //PC3,6,7置低c,d,g
PD_ODR &=0xfd; //PD1置低b
//PA_ODR |=0x0e; //GIG1,2,3置高
//PD_ODR |=0x1c; //GIG2 2,3,4置高
break;
case 4:
PA_ODR &=0xf1; //PA1,2,3置零
PB_ODR |=0x30; //PB4,5置高
PC_ODR |=0xf8; //PC3,4,5,6,7置高
PD_ODR |=0x02; //PD1置高
//PB_ODR &=0xef; //PB4置低a
PC_ODR &=0x2f; //PC4,6,7置低c,f,g
PD_ODR &=0xfd; //PD1置低b
//PA_ODR |=0x0e; //GIG1,2,3置高
//PD_ODR |=0x1c; //GIG2 2,3,4置高
break;
case 5:
PA_ODR &=0xf1; //PA1,2,3置零
PB_ODR |=0x30; //PB4,5置高
PC_ODR |=0xf8; //PC3,4,5,6,7置高
PD_ODR |=0x02; //PD1置高
PB_ODR &=0xef; //PB4置低a
PC_ODR &=0x27; //PC3,4,6,7置低c,d,f,g
//PD_ODR &=0xfd; //PD1置低b
//PA_ODR |=0x0e; //GIG1,2,3置高
//PD_ODR |=0x1c; //GIG2 2,3,4置高
break;
case 6:
PA_ODR &=0xf1; //PA1,2,3置零
PB_ODR |=0x30; //PB4,5置高
PC_ODR |=0xf8; //PC3,4,5,6,7置高
PD_ODR |=0x02; //PD1置高
PB_ODR &=0xcf; //PB4,5置低a,e
PC_ODR &=0x27; //PC3,4,6,7置低c,d,f,g
//PD_ODR &=0xfd; //PD1置低b
//PA_ODR |=0x0e; //GIG1,2,3置高
//PD_ODR |=0x1c; //GIG2 2,3,4置高
break;
case 7:
PA_ODR &=0xf1; //PA1,2,3置零
PB_ODR |=0x30; //PB4,5置高
PC_ODR |=0xf8; //PC3,4,5,6,7置高
PD_ODR |=0x02; //PD1置高
PB_ODR &=0xef; //PB4置低a
PC_ODR &=0xbf; //PC6置低c
PD_ODR &=0xfd; //PD1置低b
//PA_ODR |=0x0e; //GIG1,2,3置高
//PD_ODR |=0x1c; //GIG2 2,3,4置高
break;
case 8:
PA_ODR &=0xf1; //PA1,2,3置零
PB_ODR |=0x30; //PB4,5置高
PC_ODR |=0xf8; //PC3,4,5,6,7置高
PD_ODR |=0x02; //PD1置高
PB_ODR &=0xcf; //PB4,5置低a,e
PC_ODR &=0x27; //PC3,4,6,7置低c,d,f,g
PD_ODR &=0xfd; //PD1置低b
//PA_ODR |=0x0e; //GIG1,2,3置高
//PD_ODR |=0x1c; //GIG2 2,3,4置高
break;
case 9:
PA_ODR &=0xf1; //PA1,2,3置零
PB_ODR |=0x30; //PB4,5置高
PC_ODR |=0xf8; //PC3,4,5,6,7置高
PD_ODR |=0x02; //PD1置高
PB_ODR &=0xef; //PB4,5置低a,e
PC_ODR &=0x27; //PC3,4,6,7置低c,d,f,g
PD_ODR &=0xfd; //PD1置低b
//PA_ODR |=0x0e; //GIG1,2,3置高
//PD_ODR |=0x1c; //GIG2 2,3,4置高
break;
}
}
/*******************************************************************************
**函数名称：void ADC_Init()
**功能描述：初始化ADC
**入口参数：无
**输出：无
*******************************************************************************/
void ADC_Init()
{
PD_DDR_bit.DDR5 = 0; //设置PD->5 为输入
PD_CR1_bit.C15 = 0; //设置为悬空输入
PD_CR2_bit.C25 = 0; //设置中断禁止
ADC_CR1_bit.SPSEL = 3; //fmaster / 18 = 16MHZ / 18 = 888888HZ
ADC_CR2_bit.ALIGN = 1; //RIGHT ALIGN
ADC_CSR_bit.CH = 5; //SELECT AIN5
ADC_CR1_bit.ADON = 1; //启动ADC
}
/*******************************************************************************
**函数名称：void ADC_Data_Read(unsigned int *AD_Value)
**功能描述：读取ADC完成一次模数转换结果
**入口参数：unsigned int *AD_Value
*AD_Value ->读取ADC采样数据的指针
**输出：无
*******************************************************************************/
void ADC_Data_Read(unsigned int *AD_Value)
{
ADC_CR1_bit.ADON = 1; //启动ADC
while(ADC_CSR_bit.EOC == 0); //等待转换结束
*AD_Value = ADC_DRH; //先读取高8位
*AD_Value = (unsigned int)((*AD_Value << 8) + ADC_DRL); //高8位与低8位相加，凑成16位数据
}
unsigned int ProcessVoltage(unsigned int tmpin)
{
unsigned long int Temp;
Temp=tmpin;
Temp*=330;
Temp/=1024;
return ((unsigned int)Temp)*11.3;
}
/*******************************************************************************
**函数名称：void Timer4Init()
**功能描述：定时器4参数初始化
**入口参数：无
**输出：无
*******************************************************************************/
void Timer4Init()
{
TIM4_IER_bit.UIE = 0; //禁止中断
TIM4_EGR_bit.UG = 0;
TIM4_PSCR_bit.PSC = 7; // 设置TIM4的时钟分频系数为 128 即定时器时钟 = 16000000 /128 = 125KHZ
TIM4_ARR = 125; // 设定TIM4产生1毫秒的计数值
TIM4_CNTR = 0x00; // 清除TIM4计数寄存器数值
TIM4_SR_bit.UIF = 0; //清除中断标志
TIM4_SR_bit.TIF = 0;
TIM4_CR1_bit.CEN = 1; //使能定时器4计数
TIM4_CR1_bit.ARPE = 1; //使能预装载
TIM4_IER_bit.UIE = 1; // 使能更新中断
}
/*******************************************************************************
**函数名称：void TIM2_Init()
**功能描述：定时器2参数初始化
**入口参数：无
**输出：无
*******************************************************************************/
void TIM2_Init()
{
TIM2_PSCR = 0x00; //定时器2预分频数为 1 分频，即定时器时钟 = 系统时钟 = 16MHz
TIM2_ARRH = 0x3E; //设置1毫秒时间自动重载 16000 = 0x3e80
TIM2_ARRL = 0x80; //
TIM2_CNTRH = 0x00; //清除计数寄存器
TIM2_CNTRL = 0x00; //
TIM2_SR1 = 0x00; //清除所有的中断标志
}
/*******************************************************************************
**函数名称：void TIM2_DelayMs(unsigned int ms)
**功能描述：定时器2参进行精确延时，最小为1毫秒，最大65535
**入口参数：unsigned int ms 1=< ms <= 65535
**输出：无
*******************************************************************************/
void TIM2_DelayMs(unsigned int ms)
{
TIM2_CR1 = 0x81; //启动定时器2开始计数
while(ms--)
{
while( !(TIM2_SR1 & 0x01)); //等待计数是否达到1毫秒
TIM2_SR1 &= ~(0x01); //计数完成1毫秒，清除相应的标志
}
TIM2_CR1 = 0x00; //延时全部结束，关闭定时器2
}
/*******************************************************************************
**函数名称：void delay(unsigned int ms) Name: void delay(unsigned int ms)
**功能描述：大概延时
**入口参数：unsigned int ms 输入大概延时数值
**输出：无
*******************************************************************************/
void delay(unsigned int ms)
{
unsigned int x , y;
for(x = ms; x > 0; x--) /* 通过一定周期循环进行延时*/
for(y = 1000 ; y > 0 ; y--);
}
/* 主函数 */
int main(void)
{
asm("sim"); //关闭系统总中断
CLK_CKDIVR = 0x00; //CPUDIV = 1 HSIDIV = 1 内部时钟 = 16Mhz
//UART1_Init(9600); //调用串口初始化函数，并设置波特率为9600 bps
//LED2Init(); //调用LED2初始化函数
GPIO_Init();
ADC_Init(); //调用ADC初始化函数
TIM2_Init();
Timer4Init(); //初始化定时器4
asm("rim"); //打开系统总中断
unsigned char i=0;
while(1)
{
if(adcflag == 1) //1秒定时时间到对使能ADC进行采样
{
asm("sim"); //关系统总中断
ADC_Data_Read(&ADCData); //读取ADC的采样数值
//Uart_SendString("ADC_DATA = " , 11); //发送字符串"ADC_DATA = "
ADCBuff[2] = ProcessVoltage(ADCData) % 10;
ADCBuff[1] = ProcessVoltage(ADCData) / 10 %10;
ADCBuff[0] = ProcessVoltage(ADCData) / 100;
//ADCBuff[2] =ADCData % 10;
//ADCBuff[1] =ADCData / 10 %10;
//ADCBuff[0] = ADCData / 100;
/*ADCBuff[3] = ADCData % 10; //转换成ASCII码
ADCBuff[2] = ADCData % 100 / 10;
ADCBuff[1] = ADCData / 100 % 10 ;
ADCBuff[0] = ADCData / 1000 ;
*/
//ADCBuff[4] = 0x0d; //换行字符
//ADCBuff[5] = 0x0a;
//Uart_SendString(ADCBuff , 6); //向PC机发送ADC采样数值
adcflag = 0; //ADC采样标志清除
asm("rim"); //开系统总中断，准备下次ADC采样
//PC_ODR ^= 0x80; //异或取反PC->3 ，使LED4进行周期性亮灭亮灭操作
i=0;
for(i=0;i<=100;i++)
{
SMG1_Display(ADCBuff[0]); //显示个位
PA_ODR |=0x02; //GIG1置高亮第一个数码管
PC_ODR &=0xdf; //PC5置高
TIM2_DelayMs(8);
SMG1_Display(ADCBuff[1]); //显示十分位
PA_ODR |=0x04; //GIG2置高亮第二个数码管
TIM2_DelayMs(8);
SMG1_Display(ADCBuff[1]); //显示百分位
PA_ODR |=0x08; //GIG3置高亮第二个数码管
TIM2_DelayMs(2);
}
i=0;
//adcflag = 0; //ADC采样标志清除
}
}
}
/** 定时器4中断服务函数 */
#pragma vector = 25
__interrupt void TIM4_UPDATE_IRQHandler(void)
{
TIM4_SR_bit.UIF = 0; //清除中断标志
ms_count++;
if(ms_count >= 800) //记录1秒时间到
{
ms_count = 0;
adcflag = 1; //设置ADC采样标志
}
}

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