STM8S103F3 20管脚单片机 TIM1输入捕获IC1 IC2 测试占空比

怪伽 · 发表于 2017-11-10 23:22:28

本帖最后由怪伽于 2017-11-11 10:43 编辑

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void Capture_Duty_Init(unsigned char psc,unsigned short int arr)
{

/* -------------------- 将 PC7 重新映射为TIM1_CH2 -------------------- */
do
{
   FLASH_DUKR = 0xAE;       // DATA EEPROM解锁密钥
   asm("nop");;
   FLASH_DUKR = 0x56;
   asm("nop");;
}while(!(FLASH_IAPSR & 0x08));

// 启用写入闪存
FLASH_CR2  = 0x80;
FLASH_NCR2 = 0x7f;

// 操作选项字节
*((unsigned char *) 0x4803) = 0x01;
*((unsigned char *) 0x4804) = ~(0x01);

// 锁定Flash
FLASH_IAPSR &= 0xF7;

/* ------------------------------ GPIO设置 --------------------------- */

CLK_PCKENR1|=1<<7;       // 开启TIM1时钟

PC_DDR &= ~(1<<7);       // 输入模式
PC_CR1 |= 1<<7;          // 上拉输入
PC_CR2 &= ~(1<<7);       // 无外部中断

/* ------------------------------ 分频设置 --------------------------- */
TIM1_PSCRH = psc >> 8;
TIM1_PSCRL = psc & 0xFF; // 16分频 = 1us

// TIM1_CNTRH = 0x46;
// TIM1_CNTRL = 0x50;

// TIM1_ARRH =arr >> 8;
// TIM1_ARRL =arr & 0xFF;    // 20us

/* ------------------------------ 通道设置 --------------------------- */

TIM1_CCER1 &= 0xEE;       // 关闭IC1 IC2

TIM1_CCMR1 |= 0x02 ;    // CC1到 TI2FP1
TIM1_CCMR2 |= 0x01;       // CC2到 TI2FP2
TIM1_CCER1 &= 0xDD;
TIM1_CCER1 |= 0x13;       // CC2上升沿触发 CC1下降沿触发并 CC1 CC2 使能
TIM1_SMCR |= 0x64;       // 滤波后的定时器输入 TI2FP2  复位模式

// 清除标志位
TIM1_SR1 &= 0xF9;       // 清除 CC1IF CC2IF 标志
TIM1_SR2 &= 0xFD;       // 清除 CC1OF 标志

// 使能
TIM1_IER |= 0x06;       // 允许捕获中断
TIM1_CR1 |= 0x01;       // 使能定时器1

/* ------------------------------------------------------------------- */
}
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#pragma vector = 14                // 设置定时器1重载的中断向量号 = 14

__interrupt void TIM1_CAP_COM_IRQHandler(void)
{
if (((TIM1_SR1 & 0x02) != RESET ) && ((TIM1_IER & 0x02) != RESET ))
{

   IC1Value = TIM1_CCR1H;
   IC1Value = (unsigned char)((IC1Value << 8) + TIM1_CCR1L);
   TIM1_SR1 = (~0x02);          // 清除 CC1 中断标志位

   printf("下降沿捕获成功....\r\n IC1Value = %d \r\n",&IC1Value);
}else
      if (((TIM1_SR1 & 0x04) != RESET ) && ((TIM1_IER & 0x04) != RESET ))
      {
         IC2Value = TIM1_CCR2H;
         IC2Value = (unsigned char)((IC2Value << 8) + TIM1_CCR2L);
         TIM1_SR1 = (~0x04);    // 清除 CC2 中断标志位

         printf("上升沿捕获成功....IC2Value = %d \r\n",&IC2Value);
      }

}

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以下为串口打印的数据: 不管占空比是多少  频率是多少的输入,都是这个数值.

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IC1Value = 411
下降沿捕获成功....
IC1Value = 411
下降沿捕获成功....
IC1Value = 411
下降沿捕获成功....
IC1Value = 411
下降沿捕获成功....
IC1Value = 411
下降沿捕获成功....
IC1Value = 411
下降沿捕获成功....
IC1Value = 411
下降沿捕获成功....
IC1Value = 411
下降沿捕获成功....
IC1Value = 411
下降沿捕获成功....
IC1Value = 411
下降沿捕获成功....
IC1Value = 411
下降沿捕获成功....
IC1Value = 411
上升沿捕获成功....IC2Value = 412

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那个上升沿捕获是在杜邦线抬起来的一瞬间产生的.其他情况只要发生中断,就会一直打印 411.

说明:  芯片:STM8S103F3 封装SSOP-20    功能

C7(TIM1_CH2) 测量占空比

求助,哪位大佬帮忙看看.

怪伽 · 发表于 2017-11-10 23:22:29

本帖最后由怪伽于 2017-11-11 16:12 编辑

/* -------------------- 将 PC6 重新映射为TIM1_CH1 -------------------- */
do
{
   FLASH_DUKR = 0xAE;       // DATA EEPROM解锁密钥
   asm("nop");;
   FLASH_DUKR = 0x56;
   asm("nop");;
}while(!(FLASH_IAPSR & 0x08));

// 启用写入闪存
FLASH_CR2  = 0x80;
FLASH_NCR2 = 0x7f;

// 操作选项字节
*((unsigned char *) 0x4803) = 0x01;
*((unsigned char *) 0x4804) = ~(0x01);

// 锁定Flash
FLASH_IAPSR &= 0xF7;

/* ------------------------------ GPIO设置 --------------------------- */

CLK_PCKENR1|=1<<7;       // 开启TIM1时钟

PC_DDR &= ~(1<<6);       // 输入模式
PC_CR1 |= 1<<6;          // 上拉输入
PC_CR2 &= ~(1<<6);       // 无外部中断

/* ------------------------------ 分频设置 --------------------------- */

// 捕捉50Hz及以上的周期和占空比
TIM1_ARRH = (arr >> 8);
TIM1_ARRL = (arr);       // 50ms 最小捕获50HZ

TIM1_PSCRH = (psc >> 8);
TIM1_PSCRL = (psc);       // 16分频 = 1us

TIM1_CR1 &= (~0x16);    // 向上计数

TIM1_RCR = 0;             // 设置重复计数器值

/* ------------------------------ 通道设置 --------------------------- */

TIM1_CCER1 &= (~0x11);    // 失能通道1 2

TIM1_CCMR1 |=  0x01  ;    // CC1到 TI1FP1 无滤波
TIM1_CCER1 &= (~0x02);    // IC1 上升沿触发

TIM1_CCMR2 |= 0x02 ;    // CC2到 TI1FP2 无滤波
TIM1_CCER1 |= 0x20;       // IC2 下降沿触发

TIM1_SMCR |= 0x54;       // 滤波后的定时器输入 TI1FP1  复位模式

TIM1_SR1 &= 0xF9;       // 清除 CC1IF CC2IF 标志
TIM1_SR2 &= 0xFD;       // 清除 CC1OF 标志

/* -------------------------------- 使能 ---------------------------- */

TIM1_IER |= 0x06;       // 中断使能
TIM1_CCER1 |= 0x11;       // CC1 CC2 使能
TIM1_CR1 |= 0x01;       // 使能定时器1

/* ------------------------------------------------------------------- */

已解决,目前是PC6复用.