TIM_HandleTypeDef htim1;
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_TIM1_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
uint32_t data;
uint8_t count;
int i;
void delay_us (uint16_t us)
{
__HAL_TIM_SET_COUNTER(&htim1,0); // set the counter value a 0
while (__HAL_TIM_GET_COUNTER(&htim1) < us); // wait for the counter to reach the us input in the parameter
}
uint32_t receive_data (void)
{
uint32_t code=0;
/* The START Sequence begin here
* there will be a pulse of 9ms LOW and
* than 4.5 ms space (HIGH)
*/
while (!(HAL_GPIO_ReadPin (GPIOB, GPIO_PIN_9))); // wait for the pin to go high.. 9ms LOW
while ((HAL_GPIO_ReadPin (GPIOB, GPIO_PIN_9))); // wait for the pin to go low.. 4.5ms HIGH
/* START of FRAME ends here*/
/* DATA Reception
* We are only going to check the SPACE after 562.5us pulse
* if the space is 562.5us, the bit indicates '0'
* if the space is around 1.6ms, the bit is '1'
*/
for (int i=0; i<32; i++)
{
count=0;
while (!(HAL_GPIO_ReadPin (GPIOB, GPIO_PIN_9))); // wait for pin to go high.. this is 562.5us LOW
while ((HAL_GPIO_ReadPin (GPIOB, GPIO_PIN_9))) // count the space length while the pin is high
{
count++;
delay_us(10);
}
if (count > 12) // if the space is more than 1.2 ms
{
code |= (1UL << (31-i)); // write 1
}
else code &= ~(1UL << (31-i)); // write 0
}
return code;
}
void convert_code (uint32_t code)
{
switch (code)
{
case (0x1FE58A7):
// lcd_send_cmd (0x86);
// lcd_send_data ('1');
HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_4);
HAL_Delay(100);
break;
case (0x1FE40BF):
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_1);
HAL_Delay (100);
break;
default :
break;
}
}
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_TIM1_Init();
/* USER CODE BEGIN 2 */
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
while (HAL_GPIO_ReadPin (GPIOB, GPIO_PIN_9)); // wait for the pin to go low
data = receive_data ();
convert_code (data);
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
I'm trying to light some LEDS connected to pins using IR remote on STM32f030
This code that I implemented waits for the pin to go low in main function .
But I want to use this as an interupt rather than a GPIO input because in mu main function I don't want to wait for the pin as rest of the things below it won't work .
SO I need help in implementing this code as as interrupt .
