/* * Copyright (c) 2006-2018, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2020-06-19 thread-liu first version */ #include #ifdef BSP_USING_LPTIM #include "drv_config.h" #include #include //#define DRV_DEBUG #define LOG_TAG "drv.lptimer" #include #define LED5_PIN GET_PIN(D, 9) LPTIM_HandleTypeDef hlptim1; extern int lptim_stop(void); void LPTIM1_IRQHandler(void) { /* enter interrupt */ rt_interrupt_enter(); HAL_LPTIM_IRQHandler(&hlptim1); /* leave interrupt */ rt_interrupt_leave(); } void HAL_LPTIM_AutoReloadMatchCallback(LPTIM_HandleTypeDef *hlptim) { if(hlptim->Instance == LPTIM1) { HAL_GPIO_TogglePin(GPIOD, GPIO_PIN_9); } #if defined(BSP_USING_PWR) /* All level of ITs can interrupt */ __set_BASEPRI(0U); lptim_stop(); rt_kprintf("system returns to normal!\n"); #endif } static int lptim_control(uint8_t pre_value) { if(pre_value > 7) { pre_value = 7; } hlptim1.Instance->CFGR &= ~(7 << 9); /* clear PRESC[2:0] */ hlptim1.Instance->CFGR |= pre_value << 9; /* set PRESC[2:0] */ rt_kprintf("set lptim pre value [0x%x] success!\n", pre_value); return RT_EOK; } int lptim_start(void) { /* ### Start counting in interrupt mode ############################# */ if (HAL_LPTIM_Counter_Start_IT(&hlptim1, 32767) != HAL_OK) { LOG_D("lptim1 start counting failed!\n"); return -RT_ERROR; } LOG_D("lptim1 start counting success!\n"); return RT_EOK; } int lptim_stop(void) { if (HAL_LPTIM_Counter_Stop_IT(&hlptim1) != HAL_OK) { LOG_D("lptim1 stop failed!\n"); return -RT_ERROR; } LOG_D("lptim1 stop counting success!\n"); return RT_EOK; } int lptim_init(void) { rt_pin_mode(LED5_PIN, PIN_MODE_OUTPUT); hlptim1.Instance = LPTIM1; hlptim1.Init.Clock.Source = LPTIM_CLOCKSOURCE_APBCLOCK_LPOSC; hlptim1.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV8; hlptim1.Init.UltraLowPowerClock.Polarity = LPTIM_CLOCKPOLARITY_RISING; hlptim1.Init.UltraLowPowerClock.SampleTime = LPTIM_CLOCKSAMPLETIME_DIRECTTRANSITION; hlptim1.Init.Trigger.Source = LPTIM_TRIGSOURCE_SOFTWARE; hlptim1.Init.OutputPolarity = LPTIM_OUTPUTPOLARITY_HIGH; hlptim1.Init.UpdateMode = LPTIM_UPDATE_IMMEDIATE; hlptim1.Init.CounterSource = LPTIM_COUNTERSOURCE_INTERNAL; hlptim1.Init.Input1Source = LPTIM_INPUT1SOURCE_GPIO; hlptim1.Init.Input2Source = LPTIM_INPUT2SOURCE_GPIO; if (HAL_LPTIM_Init(&hlptim1) != HAL_OK) { LOG_D("lptim init failed!\n"); return -RT_ERROR; } LOG_D("lptim init success!\n"); return RT_EOK; } INIT_DEVICE_EXPORT(lptim_init); static int lptim_sample(int argc, char *argv[]) { if (argc > 1) { if (!strcmp(argv[1], "start")) { lptim_start(); return RT_EOK; } else if (!strcmp(argv[1], "stop")) { lptim_stop(); return RT_EOK; } else if (!strcmp(argv[1], "set")) { if (argc > 2) { lptim_control(atoi(argv[2])); return RT_EOK; } else { goto _exit; } } else { goto _exit; } } _exit: { rt_kprintf("Usage:\n"); rt_kprintf("lptim_sample start - start lptim, the LED5 will start blink\n"); rt_kprintf("lptim_sample stop - stop lptim, the LED5 will stop blink\n"); rt_kprintf("lptim_sample set - set the lptim prescaler to change LED5 blink frquency, lptim_sample set [0 - 7]\n"); } return -RT_ERROR; } MSH_CMD_EXPORT(lptim_sample, low power timer sample); #endif