Input (STM32)是否可以仅使用定时器1、CH1和CH2捕获两个不同的信号?
我目前正在从事一个项目,我正在尝试测量连接到定时器1(通道1和通道2)的两个不同信号的占空比和频率 PE9----->TIM1\U CH1 PE11----->TIM1\U CH2 我的计划是每100ms在CH1和CH2之间切换一次,调用一个名为PwmInput_SwitchChannels(BOOL)的函数,该函数包含每个通道的正确配置。在中断函数中,我希望捕获值并将它们存储在一个由两个pwm_捕获类型元素组成的数组中Input (STM32)是否可以仅使用定时器1、CH1和CH2捕获两个不同的信号?,input,embedded,stm32,capture,pwm,Input,Embedded,Stm32,Capture,Pwm,我目前正在从事一个项目,我正在尝试测量连接到定时器1(通道1和通道2)的两个不同信号的占空比和频率 PE9----->TIM1\U CH1 PE11----->TIM1\U CH2 我的计划是每100ms在CH1和CH2之间切换一次,调用一个名为PwmInput_SwitchChannels(BOOL)的函数,该函数包含每个通道的正确配置。在中断函数中,我希望捕获值并将它们存储在一个由两个pwm_捕获类型元素组成的数组中 typedef struct { __IO UInt1
typedef struct
{
__IO UInt16 uhIC2Value;
__IO UInt16 uhDutyCycle;
__IO UInt32 uwFrequency;
}
pwm_capture;
pwm_capture input_capture[2];
问题是1个通道的捕获值与真实的不匹配,这似乎是PwmInput_开关通道中的问题。
当我独立测试这两个通道时,代码运行得非常好,中断功能正在发挥作用
#define PIN18_PWM_A ((BOOL) 0)
#define PIN19_PWM_B ((BOOL) 1)
typedef struct
{
__IO UInt16 uhIC2Value;
__IO UInt16 uhDutyCycle;
__IO UInt32 uwFrequency;
}
pwm_capture;
pwm_capture input_capture[2];
BOOL Tim1_Channels = 0;
UInt16 counter_pwm = 0;
void HalTim_MainFunction(void)
{
if ( FALSE != rb_InitStatus )
{
counter_pwm++;
if(counter_pwm % 100 == 0)
{
Tim1_Channels = ! Tim1_Channels;
PwmInput_SwitchChannels(Tim1_Channels);
}
}
else {
;
}
}
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)
{
if(htim->Instance == TIM1)
{
switch(Tim1_Channels){
case PIN18_PWM_A:
{
if (htim->Channel == HAL_TIM_ACTIVE_CHANNEL_2)
{
/* Get the Input Capture value */
input_capture[0].uhIC2Value = HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_2);
if (input_capture[0].uhIC2Value != 0)
{
/* Duty cycle computation */
input_capture[0].uhDutyCycle = ((HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_1)) * 100) / input_capture[0].uhIC2Value;
/* uwFrequency computation
TIM1 counter clock = (RCC_Clocks.HCLK_Frequency)/2 */
input_capture[0].uwFrequency = (HAL_RCC_GetHCLKFreq()) / input_capture[0].uhIC2Value;
}
else
{
input_capture[0].uhDutyCycle = 0;
input_capture[0].uwFrequency = 0;
}
}
break;
}
case PIN19_PWM_B:
{
if (htim->Channel == HAL_TIM_ACTIVE_CHANNEL_1)
{
/* Get the Input Capture value */
input_capture[1].uhIC2Value = HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_1);
if (input_capture[1].uhIC2Value != 0)
{
/* Duty cycle computation */
input_capture[1].uhDutyCycle = ((HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_2)) * 100) / input_capture[1].uhIC2Value;
/* uwFrequency computation
TIM1 counter clock = (RCC_Clocks.HCLK_Frequency)/2 */
input_capture[1].uwFrequency = (HAL_RCC_GetHCLKFreq()) / input_capture[1].uhIC2Value;
}
else
{
input_capture[1].uhDutyCycle = 0;
input_capture[1].uwFrequency = 0;
}
}
break;
}
default:
Error_Handler();
}
}
}
void PwmInput_SwitchChannels(BOOL aux)
{
TIM_SlaveConfigTypeDef sSlaveConfig_aux = {0};
TIM_MasterConfigTypeDef sMasterConfig_aux = {0};
TIM_IC_InitTypeDef sConfigIC_aux = {0};
/*##-4- Stop the Input Capture in interrupt mode ##########################*/
if (HAL_TIM_IC_Stop_IT(&htim1, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/*##-5- Stop the Input Capture in interrupt mode ##########################*/
if (HAL_TIM_IC_Stop_IT(&htim1, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
switch (aux){
case PIN18_PWM_A:
{
sSlaveConfig_aux.SlaveMode = TIM_SLAVEMODE_RESET;
sSlaveConfig_aux.InputTrigger = TIM_TS_TI2FP2;
sSlaveConfig_aux.TriggerPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
sSlaveConfig_aux.TriggerFilter = 0;
if (HAL_TIM_SlaveConfigSynchronization(&htim1, &sSlaveConfig_aux) != HAL_OK)
{
Error_Handler();
}
sMasterConfig_aux.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig_aux.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig_aux) != HAL_OK)
{
Error_Handler();
}
sConfigIC_aux.ICPolarity = TIM_INPUTCHANNELPOLARITY_FALLING;
sConfigIC_aux.ICSelection = TIM_ICSELECTION_INDIRECTTI;
sConfigIC_aux.ICPrescaler = TIM_ICPSC_DIV1;
sConfigIC_aux.ICFilter = 0;
if (HAL_TIM_IC_ConfigChannel(&htim1, &sConfigIC_aux, TIM_CHANNEL_1) != HAL_OK)
{
Error_Handler();
}
sConfigIC_aux.ICPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
sConfigIC_aux.ICSelection = TIM_ICSELECTION_DIRECTTI;
if (HAL_TIM_IC_ConfigChannel(&htim1, &sConfigIC_aux, TIM_CHANNEL_2) != HAL_OK)
{
Error_Handler();
}
break;
}
case PIN19_PWM_B:
{
sSlaveConfig_aux.SlaveMode = TIM_SLAVEMODE_RESET;
sSlaveConfig_aux.InputTrigger = TIM_TS_TI1FP1;
sSlaveConfig_aux.TriggerPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
sSlaveConfig_aux.TriggerFilter = 0;
if (HAL_TIM_SlaveConfigSynchronization(&htim1, &sSlaveConfig_aux) != HAL_OK)
{
Error_Handler();
}
sMasterConfig_aux.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig_aux.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig_aux) != HAL_OK)
{
Error_Handler();
}
sConfigIC_aux.ICPolarity = TIM_INPUTCHANNELPOLARITY_FALLING;
sConfigIC_aux.ICSelection = TIM_ICSELECTION_INDIRECTTI;
sConfigIC_aux.ICPrescaler = TIM_ICPSC_DIV1;
sConfigIC_aux.ICFilter = 0;
if (HAL_TIM_IC_ConfigChannel(&htim1, &sConfigIC_aux, TIM_CHANNEL_2) != HAL_OK)
{
Error_Handler();
}
sConfigIC_aux.ICPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
sConfigIC_aux.ICSelection = TIM_ICSELECTION_DIRECTTI;
if (HAL_TIM_IC_ConfigChannel(&htim1, &sConfigIC_aux, TIM_CHANNEL_1) != HAL_OK)
{
Error_Handler();
}
break;
}
default:
Error_Handler();
/*##-4- Start the Input Capture in interrupt mode ##########################*/
if (HAL_TIM_IC_Start_IT(&htim1, TIM_CHANNEL_2) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
/*##-5- Start the Input Capture in interrupt mode ##########################*/
if (HAL_TIM_IC_Start_IT(&htim1, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
}
}
我的目的是在不影响结果和性能的情况下在两个通道之间正确切换(由于硬件限制,仅使用Tim1_CH1和Tim1_CH2)。一个可能的原因是
Tim1_通道
未声明volatile
。它在主函数中写入,并在中断处理程序中访问。由于缺少volatile
限定符,优化器无法将值保存在寄存器中,也无法将其写回内存。据优化器所知,值为accessd的中断处理程序从未从主程序调用。一个可能的原因是Tim1\u通道
未声明volatile
。它在主函数中写入,并在中断处理程序中访问。由于缺少volatile
限定符,优化器无法将值保存在寄存器中,也无法将其写回内存。据优化器所知,值为accessd的中断处理程序从未从主程序调用。我通过将以下变量声明为volatile并修改中断函数中的代码来解决问题
__IO pwm_capture input_capture[2] = {{0}, {0}};
__IO BOOL Tim1_Channels = 0;
__IO UInt16 counter_pwm = 0;
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)
{
if(htim->Instance == TIM1)
{
switch(Tim1_Channels){
case PIN18_PWM_A:
{
if (htim->Channel == HAL_TIM_ACTIVE_CHANNEL_2)
{
/* Get the Input Capture value */
input_capture[0].uhIC2Value = HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_1);
if (input_capture[0].uhIC2Value != 0)
{
/* Duty cycle computation */
input_capture[0].uhDutyCycle = ((HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_2)) * 100) / input_capture[0].uhIC2Value;
/* uwFrequency computation
TIM1 counter clock = (RCC_Clocks.HCLK_Frequency)/2 */
input_capture[0].uwFrequency = (HAL_RCC_GetHCLKFreq()) / input_capture[0].uhIC2Value;
}
else
{
input_capture[0].uhDutyCycle = 0;
input_capture[0].uwFrequency = 0;
}
}
break;
}
case PIN19_PWM_B:
{
if (htim->Channel == HAL_TIM_ACTIVE_CHANNEL_1)
{
/* Get the Input Capture value */
input_capture[1].uhIC2Value = HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_1);
if (input_capture[1].uhIC2Value != 0)
{
/* Duty cycle computation */
input_capture[1].uhDutyCycle = ((HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_2)) * 100) / input_capture[1].uhIC2Value;
/* uwFrequency computation
TIM1 counter clock = (RCC_Clocks.HCLK_Frequency)/2 */
input_capture[1].uwFrequency = (HAL_RCC_GetHCLKFreq()) / input_capture[1].uhIC2Value;
}
else
{
input_capture[1].uhDutyCycle = 0;
input_capture[1].uwFrequency = 0;
}
}
break;
}
default:
Error_Handler();
}
}
}我通过将以下变量声明为volatile并修改中断函数中的代码,解决了这个问题
__IO pwm_capture input_capture[2] = {{0}, {0}};
__IO BOOL Tim1_Channels = 0;
__IO UInt16 counter_pwm = 0;
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)
{
if(htim->Instance == TIM1)
{
switch(Tim1_Channels){
case PIN18_PWM_A:
{
if (htim->Channel == HAL_TIM_ACTIVE_CHANNEL_2)
{
/* Get the Input Capture value */
input_capture[0].uhIC2Value = HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_1);
if (input_capture[0].uhIC2Value != 0)
{
/* Duty cycle computation */
input_capture[0].uhDutyCycle = ((HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_2)) * 100) / input_capture[0].uhIC2Value;
/* uwFrequency computation
TIM1 counter clock = (RCC_Clocks.HCLK_Frequency)/2 */
input_capture[0].uwFrequency = (HAL_RCC_GetHCLKFreq()) / input_capture[0].uhIC2Value;
}
else
{
input_capture[0].uhDutyCycle = 0;
input_capture[0].uwFrequency = 0;
}
}
break;
}
case PIN19_PWM_B:
{
if (htim->Channel == HAL_TIM_ACTIVE_CHANNEL_1)
{
/* Get the Input Capture value */
input_capture[1].uhIC2Value = HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_1);
if (input_capture[1].uhIC2Value != 0)
{
/* Duty cycle computation */
input_capture[1].uhDutyCycle = ((HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_2)) * 100) / input_capture[1].uhIC2Value;
/* uwFrequency computation
TIM1 counter clock = (RCC_Clocks.HCLK_Frequency)/2 */
input_capture[1].uwFrequency = (HAL_RCC_GetHCLKFreq()) / input_capture[1].uhIC2Value;
}
else
{
input_capture[1].uhDutyCycle = 0;
input_capture[1].uwFrequency = 0;
}
}
break;
}
default:
Error_Handler();
}
}
}预期的频率范围是多少?你有哪款STM32单片机?时钟频率是多少?嗨,两个信号的范围都在10khz到50khz之间,时钟频率是48Mhz,没有计时器1的预分频器,我使用stm32f103vct6.TIM_SlaveConfigTypeDef sSlaveConfig={0};TIM_MasterConfigTypeDef sMasterConfig={0};TIM_IC_InitTypeDef sConfigIC={0};htim1.Instance=TIM1;htim1.Init.Prescaler=0;htim1.Init.CounterMode=TIM\u CounterMode\u UP;htim1.Init.Period=65535;htim1.Init.ClockDivision=TIM\u ClockDivision\u DIV1;htim1.Init.RepetitionCounter=0;htim1.Init.autoreloaddreload=TIM\u AUTORELOAD\u PRELOAD\u DISABLE;预期的频率范围是多少?你有哪款STM32单片机?时钟频率是多少?嗨,两个信号的范围都在10khz到50khz之间,时钟频率是48Mhz,没有计时器1的预分频器,我使用stm32f103vct6.TIM_SlaveConfigTypeDef sSlaveConfig={0};TIM_MasterConfigTypeDef sMasterConfig={0};TIM_IC_InitTypeDef sConfigIC={0};htim1.Instance=TIM1;htim1.Init.Prescaler=0;htim1.Init.CounterMode=TIM\u CounterMode\u UP;htim1.Init.Period=65535;htim1.Init.ClockDivision=TIM\u ClockDivision\u DIV1;htim1.Init.RepetitionCounter=0;htim1.Init.autoreloaddreload=TIM\u AUTORELOAD\u PRELOAD\u DISABLE;非常感谢,我通过修改中断函数解决了这个问题,正如你所说,我声明了Tim1_通道不稳定。非常感谢,我通过修改中断函数解决了这个问题,正如你所说,我声明了Tim1_通道不稳定。