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polyfractal 2016-12-30 18:23:32 -05:00
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component/common/mbed/targets/hal/rtl8195a/pwmout_api.c Normal file
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/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2014, Realtek Semiconductor Corp.
* All rights reserved.
*
* This module is a confidential and proprietary property of RealTek and
* possession or use of this module requires written permission of RealTek.
*******************************************************************************
*/
#include "device.h"
#include "objects.h"
#include "pinmap.h"
//#include <rtl_lib.h>
#if DEVICE_PWMOUT
#ifdef CONFIG_PWM_EN
#include "pwmout_api.h"
static const PinMap PinMap_PWM[] = {
{PB_4, RTL_PIN_PERI(PWM0, 0, S0), RTL_PIN_FUNC(PWM0, S0)},
{PB_5, RTL_PIN_PERI(PWM1, 1, S0), RTL_PIN_FUNC(PWM1, S0)},
{PB_6, RTL_PIN_PERI(PWM2, 2, S0), RTL_PIN_FUNC(PWM2, S0)},
{PB_7, RTL_PIN_PERI(PWM3, 3, S0), RTL_PIN_FUNC(PWM3, S0)},
{PC_0, RTL_PIN_PERI(PWM0, 0, S1), RTL_PIN_FUNC(PWM0, S1)},
{PC_1, RTL_PIN_PERI(PWM1, 1, S1), RTL_PIN_FUNC(PWM1, S1)},
{PC_2, RTL_PIN_PERI(PWM2, 2, S1), RTL_PIN_FUNC(PWM2, S1)},
{PC_3, RTL_PIN_PERI(PWM3, 3, S1), RTL_PIN_FUNC(PWM3, S1)},
{PD_3, RTL_PIN_PERI(PWM0, 0, S2), RTL_PIN_FUNC(PWM0, S2)},
{PD_4, RTL_PIN_PERI(PWM1, 1, S2), RTL_PIN_FUNC(PWM1, S2)},
{PD_5, RTL_PIN_PERI(PWM2, 2, S2), RTL_PIN_FUNC(PWM2, S2)},
{PD_6, RTL_PIN_PERI(PWM3, 3, S2), RTL_PIN_FUNC(PWM3, S2)},
{PE_0, RTL_PIN_PERI(PWM0, 0, S3), RTL_PIN_FUNC(PWM0, S3)},
{PE_1, RTL_PIN_PERI(PWM1, 1, S3), RTL_PIN_FUNC(PWM1, S3)},
{PE_2, RTL_PIN_PERI(PWM2, 2, S3), RTL_PIN_FUNC(PWM2, S3)},
{PE_3, RTL_PIN_PERI(PWM3, 3, S3), RTL_PIN_FUNC(PWM3, S3)},
{NC, NC, 0}
};
void pwmout_init(pwmout_t* obj, PinName pin)
{
uint32_t peripheral;
u32 pwm_idx;
u32 pin_sel;
DBG_PWM_INFO("%s: Init PWM for pin(0x%x)\n", __FUNCTION__, pin);
// Get the peripheral name from the pin and assign it to the object
peripheral = pinmap_peripheral(pin, PinMap_PWM);
if (unlikely(peripheral == NC)) {
DBG_PWM_ERR("%s: Cannot find matched pwm for this pin(0x%x)\n", __FUNCTION__, pin);
return;
}
pwm_idx = RTL_GET_PERI_IDX(peripheral);
pin_sel = RTL_GET_PERI_SEL(peripheral);
obj->pwm_idx = pwm_idx;
obj->pin_sel = pin_sel;
obj->period = 0;
obj->pulse = 0;
_memset((void *)&obj->pwm_hal_adp, 0, sizeof(HAL_PWM_ADAPTER));
if (HAL_OK != HAL_Pwm_Init(&obj->pwm_hal_adp, pwm_idx, pin_sel)) {
DBG_PWM_ERR("pwmout_init Err!\n");
return;
}
pwmout_period_us(obj, 20000); // 20 ms per default
HAL_Pwm_Enable(&obj->pwm_hal_adp);
}
void pwmout_free(pwmout_t* obj)
{
HAL_Pwm_Disable(&obj->pwm_hal_adp);
}
void pwmout_write(pwmout_t* obj, float value)
{
if (value < (float)0.0) {
value = 0.0;
}
else if (value > (float)1.0) {
value = 1.0;
}
obj->pulse = (uint32_t)((float)obj->period * value);
HAL_Pwm_SetDuty(&obj->pwm_hal_adp, obj->period, obj->pulse);
}
float pwmout_read(pwmout_t* obj)
{
float value = 0;
if (obj->period > 0) {
value = (float)(obj->pulse) / (float)(obj->period);
}
return ((value > (float)1.0) ? (float)(1.0) : (value));
}
void pwmout_period(pwmout_t* obj, float seconds)
{
pwmout_period_us(obj, (int)(seconds * 1000000.0f));
}
void pwmout_period_ms(pwmout_t* obj, int ms)
{
pwmout_period_us(obj, (int)(ms * 1000));
}
void pwmout_period_us(pwmout_t* obj, int us)
{
float dc = pwmout_read(obj);
obj->period = us;
// Set duty cycle again
pwmout_write(obj, dc);
}
void pwmout_pulsewidth(pwmout_t* obj, float seconds)
{
pwmout_pulsewidth_us(obj, (int)(seconds * 1000000.0f));
}
void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
{
pwmout_pulsewidth_us(obj, ms * 1000);
}
void pwmout_pulsewidth_us(pwmout_t* obj, int us)
{
float value = (float)us / (float)obj->period;
pwmout_write(obj, value);
}
#endif // #ifdef CONFIG_PWM_EN
#endif