CC2640R2F 定时器边缘计数模式

user6359397

GPTimerCC26XX_Handle hTimer;
void timerCallback(GPTimerCC26XX_Handle handle, GPTimerCC26XX_IntMask interruptMask) {
    // interrupt callback code goes here. Minimize processing in interrupt.
}
void taskFxn(uintptr_t a0, uintptr_t a1) {
  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);
  while(1) {
    Task_sleep(BIOS_WAIT_FOREVER);
  }
}

如果我将TIMER的工作模式改成了GPT_MODE_EDGE_COUNT ,并用GPTimerCC26XX_getValue来获取一段时间内我捕获的边缘数目。那在上面的范例代码中，周期计时模式是在定时时间到达后调用回调函数 timerCallback的，但是如果是EDGE_COUNT模式呢？回调函数是在什么时候调用？是在定时时间结束吗？

如果是定时时间结束后调用？我是不是可以在回调函数中使用GPTimerCC26XX_getValue来获取该时间段内捕获的边缘数目？

5 年多前

0 Kevin Qiu 5 年多前

TI__Guru* 82220 points

你说的GPT_MODE_EDGE_COUNT和EDGE_COUNT不是同一个模式吗，是在定时时间结束后调用

0 user6359397 5 年多前回复 Kevin Qiu

Expert 1790 points

是一样的，我在代码实现的时候他一直在等待边缘事件的发生，但我并不知道它到底在检测哪个引脚的事件，比如说我想用DIO21来检测脉冲数量，要怎么配置我的输入端口？

0 user6359397 5 年多前回复 Kevin Qiu

Expert 1790 points

GPTimerCC26XX_Handle hTimer;
GPTimerCC26XX_Value timer_Value;
static PIN_State TimerPins;
static PIN_Handle TimerPinHandle = NULL;

PIN_Config TimerinitTable[] = {
    PIN_TIMER | PIN_INPUT_EN | PIN_PULLUP | PIN_IRQ_BOTHEDGES |
    PIN_HYSTERESIS,
    PIN_TERMINATE
};


void timerCallback(GPTimerCC26XX_Handle handle, GPTimerCC26XX_IntMask interruptMask) {
     // interrupt callback code goes here. Minimize processing in interrupt.
    timer_Value = GPTimerCC26XX_getValue(hTimer);
    Log_info0("timer_working!");
    Log_info1("Value is %d",timer_Value);

 }
extern void timer_init(void)
{
    if(TimerPinHandle==NULL)
    {
        TimerPinHandle = PIN_open(&TimerPins,TimerinitTable);
    }
    PINCC26XX_setMux(TimerPinHandle, PIN_TIMER, GPT_PIN_0A );
    GPTimerCC26XX_Params params;
    GPTimerCC26XX_Params_init(&params);
    params.width          = GPT_CONFIG_16BIT;
    params.mode           = GPT_MODE_EDGE_COUNT;
    params.direction      = GPTimerCC26XX_DIRECTION_UP;
    params.debugStallMode = GPTimerCC26XX_DEBUG_STALL_OFF;
    hTimer = GPTimerCC26XX_open(Board_GPTIMER0A, &params);
    if(hTimer == NULL) {
        Log_error0("Failed to open GPTimer");
        Task_exit();
    }

    xdc_runtime_Types_FreqHz  freq;
    BIOS_getCpuFreq(&freq);
    GPTimerCC26XX_Value loadVal = freq.lo / 100 - 1;
    GPTimerCC26XX_setLoadValue(hTimer, loadVal);
    GPTimerCC26XX_registerInterrupt(hTimer, timerCallback, GPT_INT_CAPTURE);
    GPTimerCC26XX_setCaptureEdge(hTimer,GPTimerCC26XX_BOTH_EDGES);

    GPTimerCC26XX_start(hTimer);

}

我按照历程写了边缘捕获的代码，但并没有成功调用回调函数，这是什么环节出现问题呢?

0 Kevin Qiu 5 年多前回复 user6359397

TI__Guru* 82220 points

你用的是哪个例程？

0 user6359397 5 年多前回复 Kevin Qiu

Expert 1790 points

file:///home/magic/ti/simplelink_cc2640r2_sdk_4_10_00_10/docs/tidrivers/doxygen/html/_g_p_timer_c_c26_x_x_8h.html#ab4a2e82c659e0ea1fa2ae7a852298359a46af9b3278d2116fd4862c7fe19624b7

0 Kevin Qiu 5 年多前回复 user6359397

TI__Guru* 82220 points

这部分代码的功能只是利用定时器产生中断，参考下这里:e2e.ti.com/.../433597

0 Kevin Qiu 5 年多前回复 Kevin Qiu

TI__Guru* 82220 points

设置引脚用PINCC26XX_setMux()

PIN_Status PINCC26XX_setMux ( PIN_Handle handle,
PIN_Id pinId,
int32_t nMux
)

Connect pin to HW peripheral, signal or to GPIO.

Parameters

handle	Handle provided by previous call to PIN_open()
pinId	Pin ID
nMux	Device-specific index of peripheral port or hardware signal. A value of -1 reverts the pin to GPIO mapping

Returns: PIN_SUCCESS if successful, else error code

Note: Mostly used by driver code or for diagnostics

Usage: PIN_setMux(hPins, PIN_ID(16), PINCC26XX_UART_TX);

0 user6359397 5 年多前回复 Kevin Qiu

Expert 1790 points

/*!
 *  @brief
 *  Definitions for supported GPTimer interrupts. GPTimerCC26XX_IntMask
 *  arguments should be a bit vector containing these definitions.
 *  See description in Technical Reference
 */
typedef enum GPTimerCC26XX_Interrupt
{
    GPT_INT_TIMEOUT           = 1 << 0,
        GPT_INT_CAPTURE_MATCH = 1 << 1,
        GPT_INT_CAPTURE       = 1 << 2,
        GPT_INT_MATCH         = 1 << 3,
} GPTimerCC26XX_Interrupt;

        GPT_INT_CAPTURE_MATCH = 1 << 1,
        GPT_INT_CAPTURE       = 1 << 2,
        GPT_INT_MATCH         = 1 << 3,

这三种模式都是如何触发中断的？？为什么我选择GPT_INT_CAPTURE就不会触发中断，但使用GPT_INT_CAPTURE_MATCH就可以
没有看到这三个触发条件的详细描述阿，能解释下吗

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CC2640R2F 定时器边缘计数模式