How to controll esc with pwm signal from RC controller

[Matyáš]

So i have this simple code for pwm input for the rc controller :

void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef* htim)
{
if (htim->Instance == TIM2)
{
if (htim->Channel == HAL_TIM_ACTIVE_CHANNEL_1)
{
capture_value[0] = HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_1);
if (capture_value[0])
{
frequency[0] = SystemCoreClock / capture_value[0];
duty_cycle[0] = 10000 * HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_2) / capture_value[0];
}

} }

How to take the value of  capture_value and controll an ESC with it?  i feel like i tried anything at this point and it just wont work. Here is my last attempt 

uint32_t mappedValue[0];
uint32_t pwmInput[0];

long map(long x, long in_min, long in_max, long out_min, long out_max)
{
return (x - in_min) * (out_max - out_min + 1) / (in_max - in_min + 1) + out_min;
}

// Function to set PWM duty cycle for motors
void setMotorPWM(uint32_t motorIndex, uint32_t pwmValue)
{
// Ensure motorIndex is within bounds
if (motorIndex < 4)
{
// Set PWM duty cycle for the corresponding motor channel
if (motorIndex == 0)
__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_1, pwmValue);
else if (motorIndex == 1)
__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_2, pwmValue);
else if (motorIndex == 2)
__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_3, pwmValue);
else if (motorIndex == 3)
__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_4, pwmValue);

// Optionally, update the duty_cycle array
duty_cycle[motorIndex] = pwmValue;
}
}

void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
// Assuming this callback is triggered based on the PWM input from the RC controller
if (htim == &htim1)
{
// Read the PWM input value from your RC controller (you need to implement this part)
pwmInput[0] = duty_cycle[0];

// Map the PWM input to the desired range for your motors
mappedValue[0] = map(pwmInput[0], 0, 2000, 50, 150);

// Set the PWM duty cycle for the first motor
setMotorPWM(0, mappedValue[0]);
}
}

------------

int main(void)
{
/* USER CODE BEGIN 1 */
// Initialize your hardware peripherals (TIM, GPIO, etc.) and system

// Start PWM for all motor channels
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_2);
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_3);
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_4);

 

 

EDIT: I am using STM32F07G - disc1

[waclawek.jan]

> i tried anything at this point and it just wont work

What is "just wont work"? What are the expectations and what is the observed behaviour? Are the interrupts occuring?

JW

[Matyáš]

When i tried to controll the esc potenciometer

uint16_t ADC_Data=0;
int ADC_Converted = 0;
volatile uint32_t myVariable = 0;

long map(long x, long in_min, long in_max, long out_min, long out_max)
{
return (x - in_min)*(out_max - out_min + 1) / (in_max - in_min + 1 )+ out_min;
}

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef *hadc)
{
ADC_Converted = map(ADC_Data, 0, 2000, 50, 150);

TIM1->CCR1 = ADC_Converted;
}

the esc calibrates and starts working completely fine, but when i try to use the previous code, the esc isn working at all

@waclawek.jan 

[cedric H]

Hello @Matyáš ,

Why two posts for the same question ?

Did you look at the answer I did to your initial post here.

Regards

Cedric

[Matyáš]

Hello @cedric H 

Sorry , you said I put my question to the wrong section so i wanted to delte the previous but couldnt.

Anyway I downloaded the program, but I couldnt find my STM32F407G-disc1 there. Does that mean it doesnt have any motor controll unit?

Thank you for your time.

Matyáš