RTX笔记2 - RTX5时间管理
osStatus_t osDelay (uint32_t ticks)：相对时间延时
osStatus_t osDelayUntil (uint32_t ticks)：绝对时间延时
1 static void 2 _Led1Task(void *argument) 3 { 4 (void)argument; 5 6 for(;;) { 7 ledOn(&led1); 8 osDelay(500); /** delay 500 RTOS ticks **/ 9 ledOff(&led1);10 osDelay(500); /** delay 500 RTOS ticks **/11 }12 }13 14 static void15 _segLedTask(void *argument)16 {17 (void)argument;18 uint32_t tick;19 static const uint8_t seg_code[] =20 {21 DEF_LED_0,22 DEF_LED_1,23 DEF_LED_2,24 DEF_LED_3,25 DEF_LED_4,26 DEF_LED_5,27 DEF_LED_6,28 DEF_LED_7,29 DEF_LED_8,30 DEF_LED_9,31 };32 uint8_t sc_sz;33 uint8_t start_ix;34 uint8_t ix;35 36 start_ix = 0;37 sc_sz = ARRAYSIZE(seg_code);38 tick = osKernelGetTickCount();39 40 for(;;) {41 tick += 1000;42 osDelayUntil(tick); /** waits until an absolute time (1000 kernel ticks) is reached **/43 44 for(ix=0; ix < LED_GRID_NBR_MAX; ix++) {45 seg_led.buf[ix] = seg_code[(start_ix+ix)%sc_sz];46 }47 48 start_ix ++;49 if(start_ix >= sc_sz) {50 start_ix = 0;51 }52 53 ledRefresh(&seg_led);54 }55 }