我们自己的STM32L431板子正常能进入stop2模式，我想在这基础上加入LPTIM的功能定时唤醒。从官方的例程中拷贝下面的代码到程序中：
/* Set the Maximum value of the counter (Auto-Reload) that defines the Period */
#define Period (uint32_t) 65535
/* Set the Timeout value */
#define Timeout (uint32_t) (32768 - 1)
LPTIM_HandleTypeDef LptimHandle;
RCC_PeriphCLKInitTypeDef RCC_PeriphCLKInitStruct;
static void LSE_ClockEnable(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable LSE clock */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
RCC_OscInitStruct.LSEState = RCC_LSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
//Error_Handler();
printf("LSE_ClockEnable error\r\n");
}
}
/**
* @brief LPTIM MSP Init
* @param hlptim : LPTIM handle
* @retval None
*/
void HAL_LPTIM_MspInit(LPTIM_HandleTypeDef *hlptim)
{
//GPIO_InitTypeDef GPIO_InitStruct;
/* ## - 1 - Enable LPTIM clock ############################################ */
__HAL_RCC_LPTIM1_CLK_ENABLE();
/* ## - 2 - Force & Release the LPTIM Periheral Clock Reset ############### */
/* Force the LPTIM Periheral Clock Reset */
__HAL_RCC_LPTIM1_FORCE_RESET();
/* Release the LPTIM Periheral Clock Reset */
__HAL_RCC_LPTIM1_RELEASE_RESET();
/* ## - 3 - Enable & Configure LPTIM Ultra Low Power Input ################# */
/* Configure PB.06 (LPTIM1_ETR) in alternate function,
Low speed push-pull mode and pull-up enabled.
Note: In order to reduce power consumption: GPIO Speed is configured in
LowSpeed */
#if 0
/* Enable GPIO PORT(s)*/
LPTIMx_GPIO_PORT_ENABLE;
/* Configure PB.06 */
GPIO_InitStruct.Pin = GPIO_PIN_ETR;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PUPD_ETR;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_MEDIUM;
GPIO_InitStruct.Alternate = GPIO_AF_LPTIMx_ETR;
HAL_GPIO_Init(LPTIMx_ETR_GPIO_PORT, &GPIO_InitStruct);
#endif
/* Enable and set LPTIM Interrupt to the highest priority */
HAL_NVIC_SetPriority(LPTIM1_IRQn, 1, 0);
HAL_NVIC_EnableIRQ(LPTIM1_IRQn);
}
void HAL_LPTIM_CompareMatchCallback(LPTIM_HandleTypeDef *hlptim)
{
/* Timeout was reached, toggle LED2 */
printf("LPTIME wakeup\r\n");
}
void LPTIM1_IRQHandler(void)
{
HAL_LPTIM_IRQHandler(&LptimHandle);
}
在main函数中加入：
HAL_Init();
/* Enable the LSE source */
LSE_ClockEnable();
/* ### - 1 - Re-target the LSE to Clock the LPTIM Counter ################# */
/* Select the LSE clock as LPTIM peripheral clock */
RCC_PeriphCLKInitStruct.PeriphClockSelection = RCC_PERIPHCLK_LPTIM1;
RCC_PeriphCLKInitStruct.Lptim1ClockSelection = RCC_LPTIM1CLKSOURCE_LSE;
HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphCLKInitStruct);
/* ### - 2 - Initialize LPTIM peripheral ################################## */
/*
* Instance = LPTIM1.
* Clock Source = APB or LowPowerOSCillator
* Counter source = Internal event.
* Clock prescaler = 1 (No division).
* Counter Trigger = Trigger1: PC.03
* Active Edge = Rising edge.
*/
LptimHandle.Instance = LPTIM1;
LptimHandle.Init.Clock.Source = LPTIM_CLOCKSOURCE_APBCLOCK_LPOSC;
LptimHandle.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV1;
LptimHandle.Init.Trigger.Source = LPTIM_TRIGSOURCE_0;
LptimHandle.Init.Trigger.ActiveEdge = LPTIM_ACTIVEEDGE_RISING;
LptimHandle.Init.CounterSource = LPTIM_COUNTERSOURCE_INTERNAL;
LptimHandle.Init.Input1Source = LPTIM_INPUT1SOURCE_GPIO;
LptimHandle.Init.Input2Source = LPTIM_INPUT2SOURCE_GPIO;
/* Initialize LPTIM peripheral according to the passed parameters */
if (HAL_LPTIM_Init(&LptimHandle) != HAL_OK)
{
printf("error1\r\n");
//Error_Handler();
}
/* ### - 3 - Start the Timeout function in interrupt mode ################# */
/*
* Period = 65535
* Pulse = 32767
* According to this configuration (LPTIMER clocked by LSE & compare = 32767,
* the Timeout period = (compare + 1)/LSE_Frequency = 1s
*/
if (HAL_LPTIM_TimeOut_Start_IT(&LptimHandle, Period, Timeout) != HAL_OK)
{
printf("error2\r\n");
//Error_Handler();
}
没加入代码HAL_PWREx_EnterSTOP1Mode(PWR_STOPENTRY_WFI);是因为我们自己的程序已经有
LL_PWR_SetPowerMode(LL_PWR_MODE_STOP2);
LL_LPM_EnableDeepSleep();
__WFI();
但是进不了LPTIM1_IRQHandler，LPTIM不起作用。
请问玩过LPTIM1的大大，我是不是缺少了什么步骤？
还有我在HAL_LPTIM_MspInit注释掉的PB6是起什么作用的？
谢谢 |
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