FreeRTOS

main-template.c

#include <stdio.h>

/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
#include "semphr.h"

/* Library includes. */
#include "stm32f10x.h"
#include "stm32f10x_it.h"
#include "stm32f10x_conf.h"

#include "dbgu.h"
#include "term_io.h"


static void init(void)
{
	//enable clocks for selected peripherals
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB |
		RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD |
		RCC_APB2Periph_GPIOE | RCC_APB2Periph_USART1 | RCC_APB2Periph_AFIO, ENABLE);

	/* Set the Vector Table base address at 0x08000000 */
	NVIC_SetVectorTable( NVIC_VectTab_FLASH, 0x0 );
	
	NVIC_PriorityGroupConfig( NVIC_PriorityGroup_4 );
	
	/* Configure HCLK clock as SysTick clock source. */
	SysTick_CLKSourceConfig( SysTick_CLKSource_HCLK );
	
	ledsInit();
	
	//custom drivers init
	debug_init_default();
}



int main( void )
{
	init();
	//your code here
	
	vTaskStartScheduler();
	xprintf("unexpected scheduler exit!\n");
	while(1);
}




void vApplicationStackOverflowHook( xTaskHandle *pxTask, signed portCHAR *pcTaskName )
{
	xprintf("vApplicationStackOverflowHook called!\n");
	
	( void ) pxTask;
	( void ) pcTaskName;

	while(1);
}

z1.c

//..., init(...){...}
xTaskHandle taskBlueHandle;

void taskGreen(void *parameters){ 
	for(;;) {
		ledGreenOn();
		vTaskDelay(45);
		ledGreenOff();
		vTaskDelay(30);
	}
}

void taskBlue(void *parameters){ 
	portTickType last_time = xTaskGetTickCount();
	for(;;) {
		vTaskDelayUntil(&last_time, 100);
		ledBlueOn();
		vTaskDelay(20);
		ledBlueOff();
	}
}

int main( void )
{
	init();
	//your code here
	
	xTaskCreate(taskGreen, NULL, configMINIMAL_STACK_SIZE, NULL, 1, NULL);
   	xTaskCreate(taskBlue,  NULL, configMINIMAL_STACK_SIZE, NULL, 1, &taskBlueHandle);
	
	vTaskStartScheduler();
	xprintf("unexpected scheduler exit!\n");
	while(1);
}
//...

z2.c

//..., init(...){...}
xTaskHandle taskBlueHandle;
xQueueHandle rxQueue;
xQueueHandle txQueue;

void taskGreen(void *parameters){ 
	char buf;
	for(;;) {
		if( xQueueReceive(rxQueue, &buf, 20) != pdTRUE ) { continue; }
		ledGreenToggle();
		xQueueSend(txQueue, &buf, 0);
		//vTaskDelay(100);
	}
}

//void taskBlue(void *parameters){ ... }

int main( void )
{
	init();
	//your code here
	usartInit(&rxQueue,&txQueue);
	xTaskCreate(taskGreen, NULL, configMINIMAL_STACK_SIZE, NULL, 1, NULL);
   	xTaskCreate(taskBlue,  NULL, configMINIMAL_STACK_SIZE, NULL, 1, &taskBlueHandle);
	
	vTaskStartScheduler();
	xprintf("unexpected scheduler exit!\n");
	while(1);
}
//...

z3.c

void taskGreen(void *parameters){ 
	char buf;
	for(;;) {
		if( xQueueReceive(rxQueue, &buf, 20) != pdTRUE ) { continue; }
		ledGreenToggle();
		if (buf == 's') vTaskSuspend(taskBlueHandle);
		else if (buf == 'r') vTaskResume(taskBlueHandle);
		xQueueSend(txQueue, &buf, 0);
		vTaskDelay(100);
	}
}

z4.c

//..., init(...){...}
xSemaphoreHandle sem;

void taskGreen(void *parameters){ 
	for(;;) {
		vTaskDelay(2);
		xSemaphoreTake(sem, portMAX_DELAY); // no timeout
		ledGreenOn();
		xprintf("G"
		"gggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg"
		"gggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg"
		"gggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg"
		"gggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg"
		"reen");
		ledGreenOff();
		xSemaphoreGive(sem);
	}
}

void taskBlue(void *parameters){ 
	for(;;) {
		vTaskDelay(2);
		xSemaphoreTake(sem, portMAX_DELAY); // no timeout
		ledGreenOn();
		xprintf("B"
		"bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"
		"bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"
		"bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"
		"bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"
		"lue");
		ledGreenOff();
		xSemaphoreGive(sem);
	}
}

int main( void )
{
	init();
	//your code here
	
	vSemaphoreCreateBinary(sem);
	if (sem == NULL) { xprintf("semaphore was not created"); while(1); }
	xTaskCreate(taskGreen, NULL, configMINIMAL_STACK_SIZE, NULL, 1, NULL);
   	xTaskCreate(taskBlue,  NULL, configMINIMAL_STACK_SIZE, NULL, 2, NULL);
	
	vTaskStartScheduler();
	xprintf("unexpected scheduler exit!\n");
	while(1);
}
//...