/* * Copyright (c) 2006-2022, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2018-12-13 zylx first version * 2021-01-23 thread-liu Fix the timer clock frequency doubling problem */ #include #ifdef BSP_USING_PWM #include "drv_config.h" #include "drv_tim.h" #include //#define DRV_DEBUG #define LOG_TAG "drv.pwm" #include #define MAX_PERIOD 65535 #define MIN_PERIOD 3 #define MIN_PULSE 2 extern void HAL_TIM_MspPostInit(TIM_HandleTypeDef *htim); enum { #ifdef BSP_USING_PWM1 PWM1_INDEX, #endif #ifdef BSP_USING_PWM2 PWM2_INDEX, #endif #ifdef BSP_USING_PWM3 PWM3_INDEX, #endif #ifdef BSP_USING_PWM4 PWM4_INDEX, #endif #ifdef BSP_USING_PWM5 PWM5_INDEX, #endif #ifdef BSP_USING_PWM6 PWM6_INDEX, #endif #ifdef BSP_USING_PWM7 PWM7_INDEX, #endif #ifdef BSP_USING_PWM8 PWM8_INDEX, #endif #ifdef BSP_USING_PWM9 PWM9_INDEX, #endif #ifdef BSP_USING_PWM10 PWM10_INDEX, #endif #ifdef BSP_USING_PWM11 PWM11_INDEX, #endif #ifdef BSP_USING_PWM12 PWM12_INDEX, #endif #ifdef BSP_USING_PWM13 PWM13_INDEX, #endif #ifdef BSP_USING_PWM14 PWM14_INDEX, #endif #ifdef BSP_USING_PWM15 PWM15_INDEX, #endif #ifdef BSP_USING_PWM16 PWM16_INDEX, #endif #ifdef BSP_USING_PWM17 PWM17_INDEX, #endif }; struct stm32_pwm { struct rt_device_pwm pwm_device; TIM_HandleTypeDef tim_handle; rt_uint8_t channel; char *name; }; static struct stm32_pwm stm32_pwm_obj[] = { #ifdef BSP_USING_PWM1 PWM1_CONFIG, #endif #ifdef BSP_USING_PWM2 PWM2_CONFIG, #endif #ifdef BSP_USING_PWM3 PWM3_CONFIG, #endif #ifdef BSP_USING_PWM4 PWM4_CONFIG, #endif #ifdef BSP_USING_PWM5 PWM5_CONFIG, #endif #ifdef BSP_USING_PWM6 PWM6_CONFIG, #endif #ifdef BSP_USING_PWM7 PWM7_CONFIG, #endif #ifdef BSP_USING_PWM8 PWM8_CONFIG, #endif #ifdef BSP_USING_PWM9 PWM9_CONFIG, #endif #ifdef BSP_USING_PWM10 PWM10_CONFIG, #endif #ifdef BSP_USING_PWM11 PWM11_CONFIG, #endif #ifdef BSP_USING_PWM12 PWM12_CONFIG, #endif #ifdef BSP_USING_PWM13 PWM13_CONFIG, #endif #ifdef BSP_USING_PWM14 PWM14_CONFIG, #endif #ifdef BSP_USING_PWM15 PWM15_CONFIG, #endif #ifdef BSP_USING_PWM16 PWM16_CONFIG, #endif #ifdef BSP_USING_PWM17 PWM17_CONFIG, #endif }; static rt_uint64_t tim_clock_get(TIM_HandleTypeDef *htim) { rt_uint32_t pclk1_doubler, pclk2_doubler; rt_uint64_t tim_clock; stm32_tim_pclkx_doubler_get(&pclk1_doubler, &pclk2_doubler); /* Some series may only have APBPERIPH_BASE, don't have HAL_RCC_GetPCLK2Freq */ #if defined(APBPERIPH_BASE) tim_clock = (rt_uint32_t)(HAL_RCC_GetPCLK1Freq() * pclk1_doubler); #elif defined(APB1PERIPH_BASE) || defined(APB2PERIPH_BASE) if ((rt_uint32_t)htim->Instance >= APB2PERIPH_BASE) { tim_clock = (rt_uint32_t)(HAL_RCC_GetPCLK2Freq() * pclk2_doubler); } else { tim_clock = (rt_uint32_t)(HAL_RCC_GetPCLK1Freq() * pclk1_doubler); } #endif return tim_clock; } static rt_err_t drv_pwm_control(struct rt_device_pwm *device, int cmd, void *arg); static struct rt_pwm_ops drv_ops = { drv_pwm_control }; static rt_err_t drv_pwm_enable(TIM_HandleTypeDef *htim, struct rt_pwm_configuration *configuration, rt_bool_t enable) { /* Converts the channel number to the channel number of Hal library */ rt_uint32_t channel = 0x04 * (configuration->channel - 1); if (!configuration->complementary) { if (!enable) { HAL_TIM_PWM_Stop(htim, channel); } else { HAL_TIM_PWM_Start(htim, channel); } } else if (configuration->complementary) { if (!enable) { HAL_TIMEx_PWMN_Stop(htim, channel); } else { HAL_TIMEx_PWMN_Start(htim, channel); } } return RT_EOK; } static rt_err_t drv_pwm_get(TIM_HandleTypeDef *htim, struct rt_pwm_configuration *configuration) { /* Converts the channel number to the channel number of Hal library */ rt_uint32_t channel = 0x04 * (configuration->channel - 1); rt_uint64_t tim_clock; tim_clock = tim_clock_get(htim); if (__HAL_TIM_GET_CLOCKDIVISION(htim) == TIM_CLOCKDIVISION_DIV2) { tim_clock = tim_clock / 2; } else if (__HAL_TIM_GET_CLOCKDIVISION(htim) == TIM_CLOCKDIVISION_DIV4) { tim_clock = tim_clock / 4; } /* Convert nanosecond to frequency and duty cycle. 1s = 1 * 1000 * 1000 * 1000 ns */ tim_clock /= 1000000UL; configuration->period = (__HAL_TIM_GET_AUTORELOAD(htim) + 1) * (htim->Instance->PSC + 1) * 1000UL / tim_clock; configuration->pulse = (__HAL_TIM_GET_COMPARE(htim, channel) + 1) * (htim->Instance->PSC + 1) * 1000UL / tim_clock; return RT_EOK; } static rt_err_t drv_pwm_set(TIM_HandleTypeDef *htim, struct rt_pwm_configuration *configuration) { rt_uint32_t period, pulse; rt_uint64_t tim_clock, psc; /* Converts the channel number to the channel number of Hal library */ rt_uint32_t channel = 0x04 * (configuration->channel - 1); tim_clock = tim_clock_get(htim); /* Convert nanosecond to frequency and duty cycle. 1s = 1 * 1000 * 1000 * 1000 ns */ tim_clock /= 1000000UL; period = (rt_uint64_t)configuration->period * tim_clock / 1000ULL ; psc = period / MAX_PERIOD + 1; period = period / psc; __HAL_TIM_SET_PRESCALER(htim, psc - 1); if (period < MIN_PERIOD) { period = MIN_PERIOD; } __HAL_TIM_SET_AUTORELOAD(htim, period - 1); pulse = (rt_uint64_t)configuration->pulse * tim_clock / psc / 1000ULL; if (pulse < MIN_PULSE) { pulse = MIN_PULSE; } /*To determine user input, output high level is required*/ else if (pulse >= period) { pulse = period + 1; } __HAL_TIM_SET_COMPARE(htim, channel, pulse - 1); /* If you want the PWM setting to take effect immediately, please uncommon the following code, but it will cause the last PWM cycle not complete. */ //__HAL_TIM_SET_COUNTER(htim, 0); //HAL_TIM_GenerateEvent(htim, TIM_EVENTSOURCE_UPDATE); /* Update frequency value */ return RT_EOK; } static rt_err_t drv_pwm_set_period(TIM_HandleTypeDef *htim, struct rt_pwm_configuration *configuration) { rt_uint32_t period; rt_uint64_t tim_clock, psc; tim_clock = tim_clock_get(htim); /* Convert nanosecond to frequency and duty cycle. 1s = 1 * 1000 * 1000 * 1000 ns */ tim_clock /= 1000000UL; period = (rt_uint64_t)configuration->period * tim_clock / 1000ULL ; psc = period / MAX_PERIOD + 1; period = period / psc; __HAL_TIM_SET_PRESCALER(htim, psc - 1); if (period < MIN_PERIOD) { period = MIN_PERIOD; } __HAL_TIM_SET_AUTORELOAD(htim, period - 1); return RT_EOK; } static rt_err_t drv_pwm_set_pulse(TIM_HandleTypeDef *htim, struct rt_pwm_configuration *configuration) { rt_uint32_t period, pulse; rt_uint64_t tim_clock; /* Converts the channel number to the channel number of Hal library */ rt_uint32_t channel = 0x04 * (configuration->channel - 1); tim_clock = tim_clock_get(htim); /* Convert nanosecond to frequency and duty cycle. 1s = 1 * 1000 * 1000 * 1000 ns */ tim_clock /= 1000000UL; period = (__HAL_TIM_GET_AUTORELOAD(htim) + 1) * (htim->Instance->PSC + 1) * 1000UL / tim_clock; pulse = (rt_uint64_t)configuration->pulse * (__HAL_TIM_GET_AUTORELOAD(htim) + 1) / period; if (pulse < MIN_PULSE) { pulse = MIN_PULSE; } else if (pulse > period) { pulse = period; } __HAL_TIM_SET_COMPARE(htim, channel, pulse - 1); return RT_EOK; } static rt_err_t drv_pwm_control(struct rt_device_pwm *device, int cmd, void *arg) { struct rt_pwm_configuration *configuration = (struct rt_pwm_configuration *)arg; TIM_HandleTypeDef *htim = (TIM_HandleTypeDef *)device->parent.user_data; switch (cmd) { case PWM_CMD_ENABLE: return drv_pwm_enable(htim, configuration, RT_TRUE); case PWM_CMD_DISABLE: return drv_pwm_enable(htim, configuration, RT_FALSE); case PWM_CMD_SET: return drv_pwm_set(htim, configuration); case PWM_CMD_SET_PERIOD: return drv_pwm_set_period(htim, configuration); case PWM_CMD_SET_PULSE: return drv_pwm_set_pulse(htim, configuration); case PWM_CMD_GET: return drv_pwm_get(htim, configuration); default: return -RT_EINVAL; } } static rt_err_t stm32_hw_pwm_init(struct stm32_pwm *device) { rt_err_t result = RT_EOK; TIM_HandleTypeDef *tim = RT_NULL; TIM_OC_InitTypeDef oc_config = {0}; TIM_MasterConfigTypeDef master_config = {0}; TIM_ClockConfigTypeDef clock_config = {0}; RT_ASSERT(device != RT_NULL); tim = (TIM_HandleTypeDef *)&device->tim_handle; /* configure the timer to pwm mode */ tim->Init.Prescaler = 0; tim->Init.CounterMode = TIM_COUNTERMODE_UP; tim->Init.Period = 0; tim->Init.ClockDivision = TIM_CLOCKDIVISION_DIV1; #if defined(SOC_SERIES_STM32F1) || defined(SOC_SERIES_STM32L4) tim->Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE; #endif if (HAL_TIM_Base_Init(tim) != HAL_OK) { LOG_E("%s pwm init failed", device->name); result = -RT_ERROR; goto __exit; } if (HAL_TIM_PWM_Init(tim) != HAL_OK) { LOG_E("%s pwm init failed", device->name); result = -RT_ERROR; goto __exit; } clock_config.ClockSource = TIM_CLOCKSOURCE_INTERNAL; if (HAL_TIM_ConfigClockSource(tim, &clock_config) != HAL_OK) { LOG_E("%s clock init failed", device->name); result = -RT_ERROR; goto __exit; } if(IS_TIM_MASTER_INSTANCE(tim->Instance)) { master_config.MasterOutputTrigger = TIM_TRGO_RESET; master_config.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE; if (HAL_TIMEx_MasterConfigSynchronization(tim, &master_config) != HAL_OK) { LOG_E("%s master config failed", device->name); result = -RT_ERROR; goto __exit; } } oc_config.OCMode = TIM_OCMODE_PWM1; oc_config.Pulse = 0; oc_config.OCPolarity = TIM_OCPOLARITY_HIGH; oc_config.OCFastMode = TIM_OCFAST_DISABLE; oc_config.OCNIdleState = TIM_OCNIDLESTATE_RESET; oc_config.OCIdleState = TIM_OCIDLESTATE_RESET; /* config pwm channel */ if (device->channel & 0x01) { if (HAL_TIM_PWM_ConfigChannel(tim, &oc_config, TIM_CHANNEL_1) != HAL_OK) { LOG_E("%s channel1 config failed", device->name); result = -RT_ERROR; goto __exit; } } if (device->channel & 0x02) { if (HAL_TIM_PWM_ConfigChannel(tim, &oc_config, TIM_CHANNEL_2) != HAL_OK) { LOG_E("%s channel2 config failed", device->name); result = -RT_ERROR; goto __exit; } } if (device->channel & 0x04) { if (HAL_TIM_PWM_ConfigChannel(tim, &oc_config, TIM_CHANNEL_3) != HAL_OK) { LOG_E("%s channel3 config failed", device->name); result = -RT_ERROR; goto __exit; } } if (device->channel & 0x08) { if (HAL_TIM_PWM_ConfigChannel(tim, &oc_config, TIM_CHANNEL_4) != HAL_OK) { LOG_E("%s channel4 config failed", device->name); result = -RT_ERROR; goto __exit; } } /* pwm pin configuration */ HAL_TIM_MspPostInit(tim); /* enable update request source */ __HAL_TIM_URS_ENABLE(tim); __exit: return result; } static void pwm_get_channel(void) { #ifdef BSP_USING_PWM1_CH1 stm32_pwm_obj[PWM1_INDEX].channel |= 1 << 0; #endif #ifdef BSP_USING_PWM1_CH2 stm32_pwm_obj[PWM1_INDEX].channel |= 1 << 1; #endif #ifdef BSP_USING_PWM1_CH3 stm32_pwm_obj[PWM1_INDEX].channel |= 1 << 2; #endif #ifdef BSP_USING_PWM1_CH4 stm32_pwm_obj[PWM1_INDEX].channel |= 1 << 3; #endif #ifdef BSP_USING_PWM2_CH1 stm32_pwm_obj[PWM2_INDEX].channel |= 1 << 0; #endif #ifdef BSP_USING_PWM2_CH2 stm32_pwm_obj[PWM2_INDEX].channel |= 1 << 1; #endif #ifdef BSP_USING_PWM2_CH3 stm32_pwm_obj[PWM2_INDEX].channel |= 1 << 2; #endif #ifdef BSP_USING_PWM2_CH4 stm32_pwm_obj[PWM2_INDEX].channel |= 1 << 3; #endif #ifdef BSP_USING_PWM3_CH1 stm32_pwm_obj[PWM3_INDEX].channel |= 1 << 0; #endif #ifdef BSP_USING_PWM3_CH2 stm32_pwm_obj[PWM3_INDEX].channel |= 1 << 1; #endif #ifdef BSP_USING_PWM3_CH3 stm32_pwm_obj[PWM3_INDEX].channel |= 1 << 2; #endif #ifdef BSP_USING_PWM3_CH4 stm32_pwm_obj[PWM3_INDEX].channel |= 1 << 3; #endif #ifdef BSP_USING_PWM4_CH1 stm32_pwm_obj[PWM4_INDEX].channel |= 1 << 0; #endif #ifdef BSP_USING_PWM4_CH2 stm32_pwm_obj[PWM4_INDEX].channel |= 1 << 1; #endif #ifdef BSP_USING_PWM4_CH3 stm32_pwm_obj[PWM4_INDEX].channel |= 1 << 2; #endif #ifdef BSP_USING_PWM4_CH4 stm32_pwm_obj[PWM4_INDEX].channel |= 1 << 3; #endif #ifdef BSP_USING_PWM5_CH1 stm32_pwm_obj[PWM5_INDEX].channel |= 1 << 0; #endif #ifdef BSP_USING_PWM5_CH2 stm32_pwm_obj[PWM5_INDEX].channel |= 1 << 1; #endif #ifdef BSP_USING_PWM5_CH3 stm32_pwm_obj[PWM5_INDEX].channel |= 1 << 2; #endif #ifdef BSP_USING_PWM5_CH4 stm32_pwm_obj[PWM5_INDEX].channel |= 1 << 3; #endif #ifdef BSP_USING_PWM6_CH1 stm32_pwm_obj[PWM6_INDEX].channel |= 1 << 0; #endif #ifdef BSP_USING_PWM6_CH2 stm32_pwm_obj[PWM6_INDEX].channel |= 1 << 1; #endif #ifdef BSP_USING_PWM6_CH3 stm32_pwm_obj[PWM6_INDEX].channel |= 1 << 2; #endif #ifdef BSP_USING_PWM6_CH4 stm32_pwm_obj[PWM6_INDEX].channel |= 1 << 3; #endif #ifdef BSP_USING_PWM7_CH1 stm32_pwm_obj[PWM7_INDEX].channel |= 1 << 0; #endif #ifdef BSP_USING_PWM7_CH2 stm32_pwm_obj[PWM7_INDEX].channel |= 1 << 1; #endif #ifdef BSP_USING_PWM7_CH3 stm32_pwm_obj[PWM7_INDEX].channel |= 1 << 2; #endif #ifdef BSP_USING_PWM7_CH4 stm32_pwm_obj[PWM7_INDEX].channel |= 1 << 3; #endif #ifdef BSP_USING_PWM8_CH1 stm32_pwm_obj[PWM8_INDEX].channel |= 1 << 0; #endif #ifdef BSP_USING_PWM8_CH2 stm32_pwm_obj[PWM8_INDEX].channel |= 1 << 1; #endif #ifdef BSP_USING_PWM8_CH3 stm32_pwm_obj[PWM8_INDEX].channel |= 1 << 2; #endif #ifdef BSP_USING_PWM8_CH4 stm32_pwm_obj[PWM8_INDEX].channel |= 1 << 3; #endif #ifdef BSP_USING_PWM9_CH1 stm32_pwm_obj[PWM9_INDEX].channel |= 1 << 0; #endif #ifdef BSP_USING_PWM9_CH2 stm32_pwm_obj[PWM9_INDEX].channel |= 1 << 1; #endif #ifdef BSP_USING_PWM9_CH3 stm32_pwm_obj[PWM9_INDEX].channel |= 1 << 2; #endif #ifdef BSP_USING_PWM9_CH4 stm32_pwm_obj[PWM9_INDEX].channel |= 1 << 3; #endif #ifdef BSP_USING_PWM10_CH1 stm32_pwm_obj[PWM10_INDEX].channel |= 1 << 0; #endif #ifdef BSP_USING_PWM11_CH1 stm32_pwm_obj[PWM11_INDEX].channel |= 1 << 0; #endif #ifdef BSP_USING_PWM12_CH1 stm32_pwm_obj[PWM12_INDEX].channel |= 1 << 0; #endif #ifdef BSP_USING_PWM12_CH2 stm32_pwm_obj[PWM12_INDEX].channel |= 1 << 1; #endif #ifdef BSP_USING_PWM13_CH1 stm32_pwm_obj[PWM13_INDEX].channel |= 1 << 0; #endif #ifdef BSP_USING_PWM14_CH1 stm32_pwm_obj[PWM14_INDEX].channel |= 1 << 0; #endif #ifdef BSP_USING_PWM15_CH1 stm32_pwm_obj[PWM15_INDEX].channel |= 1 << 0; #endif #ifdef BSP_USING_PWM16_CH1 stm32_pwm_obj[PWM16_INDEX].channel |= 1 << 0; #endif #ifdef BSP_USING_PWM17_CH1 stm32_pwm_obj[PWM17_INDEX].channel |= 1 << 0; #endif } static int stm32_pwm_init(void) { int i = 0; int result = RT_EOK; pwm_get_channel(); for (i = 0; i < sizeof(stm32_pwm_obj) / sizeof(stm32_pwm_obj[0]); i++) { /* pwm init */ if (stm32_hw_pwm_init(&stm32_pwm_obj[i]) != RT_EOK) { LOG_E("%s init failed", stm32_pwm_obj[i].name); result = -RT_ERROR; goto __exit; } else { LOG_D("%s init success", stm32_pwm_obj[i].name); /* register pwm device */ if (rt_device_pwm_register(&stm32_pwm_obj[i].pwm_device, stm32_pwm_obj[i].name, &drv_ops, &stm32_pwm_obj[i].tim_handle) == RT_EOK) { LOG_D("%s register success", stm32_pwm_obj[i].name); } else { LOG_E("%s register failed", stm32_pwm_obj[i].name); result = -RT_ERROR; } } } __exit: return result; } INIT_DEVICE_EXPORT(stm32_pwm_init); #endif /* BSP_USING_PWM */