freeRTOS v6.1.1
约定
变量名
u: unsigned
c: char
s: int16_t(short)
l: int32_t(long)
x: BaseType_t 和其他所有
函数名
前面的小写字母表示返回值； 紧随其后的是文件名。
p: pointer v: void x: xQueueReceive() returns a variable of type BaseType_t and is defined within queue.c.
必须使用
- task.c
- list.c
- queue.c
task-to-task, task-to-interrupt, interrupt-to-task.
移植必须
实现 portable.h
- heap_1.c or heap_2.c or heap_3.c
- port.c
header
- portmacro.h
最小化系统
main.c
#include <FreeRTOS.h>
int main(void)
{
vTaskStartScheduler();
return 0;
}
header
vc
Configuration Properties -> c/c++ -> Additional include Directories
"$(ProjectDir)";
"$(ProjectDir)\..\..\Source\include";
"$(ProjectDir)\..\..\Source\portable\MSVC-MingW"
FreeRTOSConfig.h
#define configUSE_PREEMPTION 1
#define configUSE_IDLE_HOOK 0
#define configUSE_TICK_HOOK 0
#define configUSE_CO_ROUTINES 0
#define configUSE_16_BIT_TICKS 0
#define configMAX_PRIORITIES ( ( unsigned portBASE_TYPE ) 7 )
#define configMINIMAL_STACK_SIZE ( ( unsigned portSHORT ) 50 )
#define configTICK_RATE_HZ ( 50 )
/* Set the following definitions to 1 to include the API function, or zero
to exclude the API function. */
#define INCLUDE_vTaskPrioritySet 1
#define INCLUDE_uxTaskPriorityGet 1
#define INCLUDE_vTaskDelete 1
#define INCLUDE_vTaskCleanUpResources 0
#define INCLUDE_vTaskSuspend 1
#define INCLUDE_vTaskDelayUntil 1
#define INCLUDE_vTaskDelay 1
#define INCLUDE_xTaskGetSchedulerState 1
add task
task function
void vTask1 (void *pvParameter)
{
const char* pcTaskName = "Task 1\r\n";
volatile unsigned int ul;
for(;;) {
printf( pcTaskName );
vTaskDelay( 100 );
}
}
call them
main.c
int main(void)
{
xTaskCreate( vTask1, /* Pointer to the function that implements the task. */
"Task 1",/* Text name for the task. This is to facilitate debugging only. */
1000, /* Stack depth - small microcontrollers will use much less stack than this. */
NULL, /* This example does not use the task parameter. */
1, /* This task will run at priority 1. */
NULL ); /* This example does not use the task handle. */
vTaskStartScheduler();
return 0;
}