/*********************************************************************
*
* LPTask
*/
static void LPTask(void) {
while (1) {
OS_Delay(100); // Syncronize to tick to avoid jitter
//
// Display measurement overhead
//
BSP_SetLED(0);
BSP_ClrLED(0);
//
// Perform measurement
//
BSP_SetLED(0); // Start measurement
OS_Resume(&TCBHP); // Resume high priority task to force task switch
}
}
void MainTask(void) {
OS_CREATETASK(&TCBHP, "HP Task", HPTask, 150, StackHP);
OS_Delay(1);
while (1) {
OS_Delay(100); // Syncronize to tick to avoid jitter
//
// Display measurement overhead
//
BSP_SetLED(0);
BSP_ClrLED(0);
//
// Perform measurement
//
BSP_SetLED(0); // Start measurement
OS_Resume(&TCBHP); // Resume high priority task to force task switch
}
}
void MENU_OP_Task(void)
{
char func_index,event ;
OS_CREATEMB(&MBFunc,1,sizeof(MBFuncBuffer),&MBFuncBuffer) ;
for(;;)
{
OS_WaitMail(&MBFunc) ;
OS_GetMail1(&MBFunc, &event) ;
if(event&EVENT_OP_STARTED)
{
OS_GetMail1(&MBFunc, &func_index) ;
Item_OP[func_index](&func_index) ;
if(OS_GetSuspendCnt(&LCD_TASK_TCB))
OS_Resume(&LCD_TASK_TCB) ;
}
}
}
void MainTask(void) {
OS_U32 MeasureOverhead; // Time for Measure Overhead
OS_U32 v; // Real context switch time
OS_CREATETASK(&TCBHP, "HP Task", HPTask, 150, StackHP);
OS_Delay(1);
//
// Measure Overhead for time measurement so we can take this into account by subtracting it
//
OS_Timing_Start(&MeasureOverhead);
OS_Timing_End(&MeasureOverhead);
//
// Perform measurements in endless loop
//
while (1) {
OS_Delay(100); // Syncronize to tick to avoid jitter
OS_Timing_Start(&_Time); // Start measurement
OS_Resume(&TCBHP); // Resume high priority task to force task switch
v = OS_Timing_GetCycles(&_Time) - OS_Timing_GetCycles(&MeasureOverhead); // Calculate real context switch time (w/o measurement overhead)
v = OS_ConvertCycles2us(1000 * v); // Convert cycles to nano-seconds, increase time resolution
printf("Context switch time: %u.%.3u usec\r\n", v / 1000, v % 1000); // Print out result
}
}
