实验原理:
STM32的定时器有PWM功能,iCore4的蓝色LED连接在定时器的输出接口上,
可以通过定时器的PWM输出控制LED的亮度,从而实验呼吸灯的功能。
核心代码:
int main(void)
{ /* USER CODE BEGIN 1 */
int brightness = ;
float temp = 0.0;
int data = ;
/* 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 ()
{
/* USER CODE END WHILE */ /* USER CODE BEGIN 3 */
HAL_Delay();
if(brightness == ){
brightness = ;
}
temp = * (sin( * PI / 99.0 * brightness) * 0.5 + 0.5);
data = (int)temp;
set_compare(data); brightness ++;
}
/* USER CODE END 3 */ }
源代码下载链接:
链接:http://pan.baidu.com/s/1hsQnbEW 密码:z12v
iCore4链接: