137 lines
4.5 KiB
C
137 lines
4.5 KiB
C
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/*
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* Copyright (c) CompanyNameMagicTag 2012-2018. All rights reserved.
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* Description: PWM APIs.
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* Author: CompanyName
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* Create: 2012-10-31
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*/
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/**
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* @defgroup hct_pwm PWM
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* @ingroup drivers
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*/
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#ifndef SOC_MDM_PWM_H
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#define SOC_MDM_PWM_H
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#include <soc_types.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @ingroup hct_pwm
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* Enumerates the PWM clock sources.
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*/
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typedef enum {
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PWM_CLK_APB, /**< 150M APB clock. */
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PWM_CLK_XTAL, /**< 25M External crystal. */
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PWM_CLK_MAX /**< Maximum value, which cannot be used. */
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} ext_pwm_clk_source;
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/**
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* @ingroup hct_pwm
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* Enumerates the PWM ports.
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*/
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typedef enum {
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EXT_PWM_PORT_PWM0, /**< PWM port. Register base address: 0x4003d200, multiplexed with GPIO0. */
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EXT_PWM_PORT_PWM1, /**< PWM1 port. Register base address: 0x4003d400, multiplexed with GPIO5. */
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EXT_PWM_PORT_MAX /**< Maximum value, which cannot be used. */
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} ext_pwm_port;
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/**
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* @ingroup hct_pwm
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* @brief Initializes the PWM module.
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*
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* @par Description:
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* Initializes the PWM module.
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* @attention
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* @li Before using the PWM function, ensure that the GPIO multiplexing relationship has been configured.
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* @li For details, see section 1.3 "Demo Overview" in the DW21 V100 API Development Guide.
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* @li For details about the multiplexed GPIO, see the DW21 V100 Data Sheet.
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* @li Before using the PWM function, initialize the PWM.
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* @param port [IN] Type #ext_pwm_port PWM port number.
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* @retval #EXT_ERR_SUCCESS Success.
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* @retval #Other values Failure. For details, see soc_errno.h.
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* @par Dependency:
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* @li soc_mdm_pwm.h: This file describes the external APIs of the PWM module.
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* @see uapi_pwm_deinit | uapi_pwm_start | uapi_pwm_stop。
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* @since DW21_V100R001C00
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*/
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td_u32 uapi_pwm_init(ext_pwm_port port);
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/**
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* @ingroup hct_pwm
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* @brief Deinitializes the PWM module.
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*
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* @par Description:
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* Deinitializes the PWM module.
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* @attention Deinitialize the PWM module when the function iss not used.
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* @param port [IN] Type #ext_pwm_port PWM port number.
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* @retval #EXT_ERR_SUCCESS Success.
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* @retval #Other values Failure. For details, see soc_errno.h.
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* @par Dependency:
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* @li soc_mdm_pwm.h: This file describes the external APIs of the PWM module.
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* @see uapi_pwm_init。
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* @since DW21_V100R001C00
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*/
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td_u32 uapi_pwm_deinit(ext_pwm_port port);
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/**
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* @ingroup hct_pwm
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* @brief Sets the clock type of the PWM module.
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*
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* @par Description:
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* This function is used to set the clock type of the PWM module.
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* @attention This setting takes effect for all PWM modules. The 150 MHz clock is used by default.
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* @param clk_type [IN] Type #ext_pwm_clk_source Clock type.
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* @retval #EXT_ERR_SUCCESS Success.
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* @retval #Other values Failure. For details, see soc_errno.h.
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* @par Dependency:
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* @li soc_mdm_pwm.h: This file describes the external APIs of the PWM module.
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* @see None
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* @since DW21_V100R001C00
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*/
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td_u32 uapi_pwm_set_clock(ext_pwm_clk_source clk_type);
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/**
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* @ingroup hct_pwm
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* @brief Outputs the PWM signal according to the configured parameter.
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* PWM signal duty cycle = duty/freq Frequency = Clock source frequency/freq.
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*
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* @par Description:
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* Starts the PWM signal output.
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* @attention This API cannot be called in an interrupt.
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* @param port [IN] Type #ext_pwm_port PWM port number.
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* @param duty [IN] Type #td_u16 PWM duty cycle count. Value range: [1, 65535]. The default value is 750.
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* @param freq [IN] Type #td_u16 Frequency division multiple. Value range: [1, 65535]. The default value is 1500.
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* @retval #EXT_ERR_SUCCESS Success.
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* @retval #Other values Failure. For details, see soc_errno.h.
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* @par Dependency:
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* @li soc_mdm_pwm.h: This file describes the external APIs of the PWM module.
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* @see uapi_pwm_init | uapi_pwm_stop。
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* @since DW21_V100R001C00
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*/
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td_u32 uapi_pwm_start(ext_pwm_port port, td_u16 duty, td_u16 freq);
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/**
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* @ingroup hct_pwm
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* @brief Stops the PWM signal output.
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*
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* @par Description:
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* Stops the PWM signal output.
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* @attention This API cannot be called in an interrupt.
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* @param port [IN] Type #ext_pwm_port PWM port number.
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* @retval #EXT_ERR_SUCCESS Success.
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* @retval #Other values Failure. For details, see soc_errno.h.
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* @par Dependency:
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* @li soc_mdm_pwm.h: This file describes the external APIs of the PWM module.
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* @see uapi_pwm_init | uapi_pwm_start。
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* @since DW21_V100R001C00
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*/
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td_u32 uapi_pwm_stop(ext_pwm_port port);
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#ifdef __cplusplus
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}
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#endif
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#endif /* SOC_MDM_PWM_H */
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