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https://github.com/cwyark/ameba-sdk-gcc-make.git
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136 lines
3.8 KiB
C
Executable file
136 lines
3.8 KiB
C
Executable file
/* mbed Microcontroller Library
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*******************************************************************************
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* Copyright (c) 2014, Realtek Semiconductor Corp.
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* All rights reserved.
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*
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* This module is a confidential and proprietary property of RealTek and
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* possession or use of this module requires written permission of RealTek.
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*******************************************************************************
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*/
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#include "device.h"
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#include "objects.h"
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#include "pinmap.h"
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//#include <rtl_lib.h>
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#if DEVICE_PWMOUT
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#ifdef CONFIG_PWM_EN
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#include "pwmout_api.h"
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static const PinMap PinMap_PWM[] = {
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{PB_4, RTL_PIN_PERI(PWM0, 0, S0), RTL_PIN_FUNC(PWM0, S0)},
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{PB_5, RTL_PIN_PERI(PWM1, 1, S0), RTL_PIN_FUNC(PWM1, S0)},
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{PB_6, RTL_PIN_PERI(PWM2, 2, S0), RTL_PIN_FUNC(PWM2, S0)},
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{PB_7, RTL_PIN_PERI(PWM3, 3, S0), RTL_PIN_FUNC(PWM3, S0)},
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{PC_0, RTL_PIN_PERI(PWM0, 0, S1), RTL_PIN_FUNC(PWM0, S1)},
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{PC_1, RTL_PIN_PERI(PWM1, 1, S1), RTL_PIN_FUNC(PWM1, S1)},
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{PC_2, RTL_PIN_PERI(PWM2, 2, S1), RTL_PIN_FUNC(PWM2, S1)},
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{PC_3, RTL_PIN_PERI(PWM3, 3, S1), RTL_PIN_FUNC(PWM3, S1)},
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{PD_3, RTL_PIN_PERI(PWM0, 0, S2), RTL_PIN_FUNC(PWM0, S2)},
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{PD_4, RTL_PIN_PERI(PWM1, 1, S2), RTL_PIN_FUNC(PWM1, S2)},
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{PD_5, RTL_PIN_PERI(PWM2, 2, S2), RTL_PIN_FUNC(PWM2, S2)},
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{PD_6, RTL_PIN_PERI(PWM3, 3, S2), RTL_PIN_FUNC(PWM3, S2)},
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{PE_0, RTL_PIN_PERI(PWM0, 0, S3), RTL_PIN_FUNC(PWM0, S3)},
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{PE_1, RTL_PIN_PERI(PWM1, 1, S3), RTL_PIN_FUNC(PWM1, S3)},
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{PE_2, RTL_PIN_PERI(PWM2, 2, S3), RTL_PIN_FUNC(PWM2, S3)},
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{PE_3, RTL_PIN_PERI(PWM3, 3, S3), RTL_PIN_FUNC(PWM3, S3)},
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{NC, NC, 0}
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};
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void pwmout_init(pwmout_t* obj, PinName pin)
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{
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uint32_t peripheral;
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u32 pwm_idx;
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u32 pin_sel;
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DBG_PWM_INFO("%s: Init PWM for pin(0x%x)\n", __FUNCTION__, pin);
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// Get the peripheral name from the pin and assign it to the object
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peripheral = pinmap_peripheral(pin, PinMap_PWM);
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if (unlikely(peripheral == NC)) {
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DBG_PWM_ERR("%s: Cannot find matched pwm for this pin(0x%x)\n", __FUNCTION__, pin);
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return;
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}
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pwm_idx = RTL_GET_PERI_IDX(peripheral);
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pin_sel = RTL_GET_PERI_SEL(peripheral);
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obj->pwm_idx = pwm_idx;
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obj->pin_sel = pin_sel;
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obj->period = 0;
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obj->pulse = 0;
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HAL_Pwm_Init(pwm_idx, pin_sel);
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pwmout_period_us(obj, 20000); // 20 ms per default
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HAL_Pwm_Enable(pwm_idx);
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}
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void pwmout_free(pwmout_t* obj)
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{
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HAL_Pwm_Disable(obj->pwm_idx);
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}
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void pwmout_write(pwmout_t* obj, float value)
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{
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if (value < (float)0.0) {
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value = 0.0;
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}
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else if (value > (float)1.0) {
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value = 1.0;
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}
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obj->pulse = (uint32_t)((float)obj->period * value);
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HAL_Pwm_SetDuty(obj->pwm_idx, obj->period, obj->pulse);
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}
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float pwmout_read(pwmout_t* obj)
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{
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float value = 0;
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if (obj->period > 0) {
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value = (float)(obj->pulse) / (float)(obj->period);
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}
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return ((value > (float)1.0) ? (float)(1.0) : (value));
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}
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void pwmout_period(pwmout_t* obj, float seconds)
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{
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pwmout_period_us(obj, (int)(seconds * 1000000.0f));
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}
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void pwmout_period_ms(pwmout_t* obj, int ms)
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{
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pwmout_period_us(obj, (int)(ms * 1000));
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}
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void pwmout_period_us(pwmout_t* obj, int us)
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{
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float dc = pwmout_read(obj);
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obj->period = us;
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// Set duty cycle again
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pwmout_write(obj, dc);
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}
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void pwmout_pulsewidth(pwmout_t* obj, float seconds)
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{
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pwmout_pulsewidth_us(obj, (int)(seconds * 1000000.0f));
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}
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void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
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{
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pwmout_pulsewidth_us(obj, ms * 1000);
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}
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void pwmout_pulsewidth_us(pwmout_t* obj, int us)
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{
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float value = (float)us / (float)obj->period;
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pwmout_write(obj, value);
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}
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#endif // #ifdef CONFIG_PWM_EN
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#endif
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