chdo wrote on Thursday, May 23, 2013:
Hello,
This is the first time taht i create a FreeRtos project so i started with a programm that allows me to turn on a led wehn i press a button, but i don’t know how to create a button interruption. I started with this program:
int main(void) {
prvSetupHardware();
setbuf(stdout,NULL);
/* Start the scheduler. */
printf("########################## MINI PROJET CS530 ################\n");
vTaskStartScheduler();
xTaskHandle xLed,xbutton,xledInitTask,xledTaskFunc;
/* Will only get here if there was not enough heap space to create the
idle task. */
return 0;
/* creation semaphore et taches , */
xSemaphore0 = xSemaphoreCreateCounting( 1,0);
if( xSemaphore0 != NULL )
{
printf(“DEBUG : CREATION SEMAPHORE SUCCED\n”);
}
/* TASKPRIORITY1 = (tskIDLE_PRIORITY + 1) et TASKPRIORITY1 = (tskIDLE_PRIORITY + 2) */
/* tache de haute priorite */
xTaskCreate(ledTaskFunc,“TASK1”, configMINIMAL_STACK_SIZE+1000 , NULL, TASKPRIORITY1,&xledTaskFunc);
/* Create the queue used by the LCD task. Messages for display on the LCD
are received via this queue. */
g_lcdQueue = xQueueCreate( LCD_QUEUE_SIZE, sizeof( LcdMsg ) );
xTaskCreate(lcdTaskFunc, “Task2”, configMINIMAL_STACK_SIZE * 2, NULL, 2, NULL);
}
/*---------------------------------------*/
static void prvSetupHardware(void) {
USART_InitTypeDef USART_InitStructure;
/* Enable GPIOA, GPIOB, GPIOC, GPIOD, GPIOE and AFIO clocks */
RCC_APB2PeriphClockCmd(
RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC
| RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE
| RCC_APB2Periph_AFIO, ENABLE);
/* Set the Vector Table base address at 0x08000000 */
#ifdef IAP_VECT_TAB_RELOCATE
NVIC_SetVectorTable(NVIC_VectTab_FLASH_RELOCATED, 0x0);
#else
NVIC_SetVectorTable( NVIC_VectTab_FLASH, 0x0 );
#endif
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);
/* Configure HCLK clock as SysTick clock source. */
SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);
/* Configure UART */
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl= USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
STM_EVAL_COMInit(COM2, &USART_InitStructure);
}
/*---------------------------------------*/
int ledInitTask(void *pParams)
{
unsigned long n;
LedInitParams *params;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
params = (LedInitParams*)pParams;
/* Enable GPIOD, GPIOE clocks */
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOD, ENABLE );
/* Configure PD13 output push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init( GPIOD, &GPIO_InitStructure );
// Enable timer clocks
RCC_APB1PeriphClockCmd( RCC_APB1Periph_TIM2, ENABLE );
TIM_TimeBaseStructInit( &TIM_TimeBaseStructure );
// Time base configuration for timer 2 - which generates the interrupts.
n = (configCPU_CLOCK_HZ / params->toggleFrequency);
TIM_TimeBaseStructure.TIM_Period = 65535;
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit( TIM2, &TIM_TimeBaseStructure );
TIM_ARRPreloadConfig( TIM2, ENABLE );
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 13;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init( &NVIC_InitStructure );
return 0;
}
void ledTaskFunc(void *pParams)
{
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
TIM_Cmd(TIM2, ENABLE);
for (; {
if ( xSemaphoreTake(xSemaphore0, portMAX_DELAY) == pdTRUE ) {
GPIO_WriteBit( GPIOD, GPIO_Pin_13, Bit_SET);
}
}
}