TIRTOS使用內部計時器相關

開發版CC3220SF，

CCS版本:Version: 8.2.0.00007 ，

OS:WINDOWS7 專業版，

使用的範例程式為timerled_CC3220SF_LAUNCHXL_tirtos_ccs，

現使用兩個GPT TIMER1與TIMER2進行燈號切換，

設定如下

GPT週期單位為Timer_PERIOD_US

GPT模式為Timer_CONTINUOUS_CALLBACK

GPT每100uS更新一次

抓出的波型如下

C2為GPT1

C4為GPT2

有幾個問題

Q1.依照範例程式的說明係使用TIRTOS，波形應該係GPT1與GPT2同時動作，怎會有GPT2落後GPT1近60幾uS?

Q2.若GPT1與GPT2要同時動作，需要怎麼設定或使用哪些方式?

以上煩請解或之!

謝謝

Viki Shi：

例程有过修改吗？启动是否在同一线程？线程优先级的设置呢？

sl p：

回复 Viki Shi:

你好

因第一次接觸這一塊posix thread，有些沒很熟悉，請多指教

程式如下

#include <stddef.h> /* Driver Header files */ #include <ti/drivers/GPIO.h> #include <ti/drivers/Timer.h> #include <ti/drivers/ADC.h> /* Board Header file */ #include "Board.h" #include "pthread.h" void timer1Callback(); void timer2Callback(); void *mainThread(void *arg0) { /* Period and duty in microseconds */ Timer_Handle timer1,timer2; Timer_Params params1,params2; int32_t status = 0; /* Call driver init functions */ GPIO_init(); Timer_init(); /* Configure the LED pin */ GPIO_setConfig(Board_GPIO_LED0, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW); GPIO_setConfig(Board_GPIO_PIN_61, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW); GPIO_setConfig(Board_GPIO_PIN_62, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW); GPIO_setConfig(Board_GPIO_PIN_63, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW); /* Turn off user LED */ GPIO_write(Board_GPIO_LED0, Board_GPIO_LED_OFF); GPIO_write(Board_GPIO_PIN_61, Board_GPIO_LED_OFF); GPIO_write(Board_GPIO_PIN_62, Board_GPIO_LED_OFF); GPIO_write(Board_GPIO_PIN_63, Board_GPIO_LED_OFF); /* Timer1 for adc, get data per 100uS */ Timer_Params_init(&params1); params1.period = 100; // 100 uS, params1.periodUnits = Timer_PERIOD_US; params1.timerMode = Timer_CONTINUOUS_CALLBACK; params1.timerCallback = timer1Callback; timer1 = Timer_open(Board_TIMER1, &params1); if (timer1 == NULL) { /* Failed to initialized timer */ while (1); } if (Timer_start(timer1) == Timer_STATUS_ERROR) { /* Failed to start timer */ while (1); } /* Timer2 for accelerator, get data per 850uS */ #define test_100u Timer_Params_init(&params2); #ifdef test_100u params2.period = 100; #else params2.period = 850; // 850 uS, #endif params2.periodUnits = Timer_PERIOD_US; params2.timerMode = Timer_CONTINUOUS_CALLBACK; params2.timerCallback = timer2Callback; timer2 = Timer_open(Board_TIMER2, &params2); if (timer2 == NULL) { /* Failed to initialized timer */ while (1); } if (Timer_start(timer2) == Timer_STATUS_ERROR) { /* Failed to start timer */ while (1); } return (NULL); } void timer1Callback() { GPIO_toggle(Board_GPIO_PIN_61); } void timer2Callback() { GPIO_toggle(Board_GPIO_PIN_62); }

以上!