cc2640r2f怎么实现某个io口边沿中断和gptimer中断的Zero-latency interrupts

user4665025

Prodigy 120 points

Other Parts Discussed in Thread: CC2640R2F, CC2650

我用的芯片是cc2640r2f，用的是TI-RTOS的蓝牙5.0的协议栈，现在应用需要实现一个没有延时的中io口下降沿中断，和一个精确的timer，中断频率大概20K，怎么实现啊？能给一个代码参考吗？

5 年多前

0 Viki Shi 5 年多前

TI__Guru**** 188340 points

请参考SDK中的GPTimer文档：C:/ti/simplelink_cc2640r2_sdk/docs/tidrivers/doxygen/html/_g_p_timer_c_c26_x_x_8h.html

0 user4665025 5 年多前回复 Viki Shi

Prodigy 120 points

GPTimerCC26XX_Params params;
GPTimerCC26XX_Params_init(&params);
params.width = GPT_CONFIG_16BIT;
params.mode = GPT_MODE_PERIODIC;
params.direction = GPTimerCC26XX_DIRECTION_UP;
params.debugStallMode = GPTimerCC26XX_DEBUG_STALL_OFF;
hTimer = GPTimerCC26XX_open(CC2650_GPTIMER0A, &params);
if(hTimer == NULL) {
Log_error0("Failed to open GPTimer");
Task_exit();
}
Types_FreqHz freq;
BIOS_getCpuFreq(&freq);
GPTimerCC26XX_Value loadVal = freq.lo / 1000 - 1; //47999
GPTimerCC26XX_setLoadValue(hTimer, loadVal);
GPTimerCC26XX_registerInterrupt(hTimer, timerCallback, GPT_INT_TIMEOUT);
GPTimerCC26XX_start(hTimer);

这种方式是有延时的，实现不了Zero-latency interrupts

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cc2640r2f怎么实现某个io口边沿中断和gptimer中断的Zero-latency interrupts