kopia lustrzana https://github.com/espressif/esp-idf
185 wiersze
5.3 KiB
C
185 wiersze
5.3 KiB
C
// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
/*******************************************************************************
|
|
* NOTICE
|
|
* The ll is not public api, don't use in application code.
|
|
* See readme.md in soc/include/hal/readme.md
|
|
******************************************************************************/
|
|
|
|
#pragma once
|
|
|
|
#include <stdlib.h>
|
|
#include "soc/dac_periph.h"
|
|
#include "hal/dac_types.h"
|
|
|
|
/**
|
|
* Power on dac module and start output voltage.
|
|
*
|
|
* @note Before powering up, make sure the DAC PAD is set to RTC PAD and floating status.
|
|
* @param channel DAC channel num.
|
|
*/
|
|
static inline void dac_ll_power_on(dac_channel_t channel)
|
|
{
|
|
RTCIO.pad_dac[channel].dac_xpd_force = 1;
|
|
RTCIO.pad_dac[channel].xpd_dac = 1;
|
|
}
|
|
|
|
/**
|
|
* Power done dac module and stop output voltage.
|
|
*
|
|
* @param channel DAC channel num.
|
|
*/
|
|
static inline void dac_ll_power_down(dac_channel_t channel)
|
|
{
|
|
RTCIO.pad_dac[channel].dac_xpd_force = 0;
|
|
RTCIO.pad_dac[channel].xpd_dac = 0;
|
|
}
|
|
|
|
/**
|
|
* Output voltage with value (8 bit).
|
|
*
|
|
* @param channel DAC channel num.
|
|
* @param value Output value. Value range: 0 ~ 255.
|
|
* The corresponding range of voltage is 0v ~ VDD3P3_RTC.
|
|
*/
|
|
static inline void dac_ll_update_output_value(dac_channel_t channel, uint8_t value)
|
|
{
|
|
if (channel == DAC_CHANNEL_1) {
|
|
SENS.sar_dac_ctrl2.dac_cw_en1 = 0;
|
|
RTCIO.pad_dac[channel].dac = value;
|
|
} else if (channel == DAC_CHANNEL_2) {
|
|
SENS.sar_dac_ctrl2.dac_cw_en2 = 0;
|
|
RTCIO.pad_dac[channel].dac = value;
|
|
}
|
|
}
|
|
|
|
/************************************/
|
|
/* DAC cosine wave generator API's */
|
|
/************************************/
|
|
/**
|
|
* Enable cosine wave generator output.
|
|
*/
|
|
static inline void dac_ll_cw_generator_enable(void)
|
|
{
|
|
SENS.sar_dac_ctrl1.sw_tone_en = 1;
|
|
}
|
|
|
|
/**
|
|
* Disable cosine wave generator output.
|
|
*/
|
|
static inline void dac_ll_cw_generator_disable(void)
|
|
{
|
|
SENS.sar_dac_ctrl1.sw_tone_en = 0;
|
|
}
|
|
|
|
/**
|
|
* Enable the cosine wave generator of DAC channel.
|
|
*
|
|
* @param channel DAC channel num.
|
|
* @param enable
|
|
*/
|
|
static inline void dac_ll_cw_set_channel(dac_channel_t channel, bool enable)
|
|
{
|
|
if (channel == DAC_CHANNEL_1) {
|
|
SENS.sar_dac_ctrl2.dac_cw_en1 = enable;
|
|
} else if (channel == DAC_CHANNEL_2) {
|
|
SENS.sar_dac_ctrl2.dac_cw_en2 = enable;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set frequency of cosine wave generator output.
|
|
*
|
|
* @note We know that CLK8M is about 8M, but don't know the actual value. so this freq have limited error.
|
|
* @param freq_hz CW generator frequency. Range: 130(130Hz) ~ 55000(100KHz).
|
|
*/
|
|
static inline void dac_ll_cw_set_freq(uint32_t freq)
|
|
{
|
|
uint32_t sw_freq = freq * 0xFFFF / RTC_FAST_CLK_FREQ_APPROX;
|
|
SENS.sar_dac_ctrl1.sw_fstep = (sw_freq > 0xFFFF) ? 0xFFFF : sw_freq;
|
|
}
|
|
|
|
/**
|
|
* Set the amplitude of the cosine wave generator output.
|
|
*
|
|
* @param channel DAC channel num.
|
|
* @param scale The multiple of the amplitude. The max amplitude is VDD3P3_RTC.
|
|
*/
|
|
static inline void dac_ll_cw_set_scale(dac_channel_t channel, dac_cw_scale_t scale)
|
|
{
|
|
if (channel == DAC_CHANNEL_1) {
|
|
SENS.sar_dac_ctrl2.dac_scale1 = scale;
|
|
} else if (channel == DAC_CHANNEL_2) {
|
|
SENS.sar_dac_ctrl2.dac_scale2 = scale;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set the phase of the cosine wave generator output.
|
|
*
|
|
* @param channel DAC channel num.
|
|
* @param scale Phase value.
|
|
*/
|
|
static inline void dac_ll_cw_set_phase(dac_channel_t channel, dac_cw_phase_t phase)
|
|
{
|
|
if (channel == DAC_CHANNEL_1) {
|
|
SENS.sar_dac_ctrl2.dac_inv1 = phase;
|
|
} else if (channel == DAC_CHANNEL_2) {
|
|
SENS.sar_dac_ctrl2.dac_inv2 = phase;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set the voltage value of the DC component of the cosine wave generator output.
|
|
*
|
|
* @note The DC offset setting should be after phase setting.
|
|
* @note Unreasonable settings can cause the signal to be oversaturated.
|
|
* @param channel DAC channel num.
|
|
* @param offset DC value. Range: -128 ~ 127.
|
|
*/
|
|
static inline void dac_ll_cw_set_dc_offset(dac_channel_t channel, int8_t offset)
|
|
{
|
|
if (channel == DAC_CHANNEL_1) {
|
|
if (SENS.sar_dac_ctrl2.dac_inv1 == DAC_CW_PHASE_180) {
|
|
offset = 0 - offset;
|
|
}
|
|
SENS.sar_dac_ctrl2.dac_dc1 = offset ? offset : (-128 - offset);
|
|
} else if (channel == DAC_CHANNEL_2) {
|
|
if (SENS.sar_dac_ctrl2.dac_inv2 == DAC_CW_PHASE_180) {
|
|
offset = 0 - offset;
|
|
}
|
|
SENS.sar_dac_ctrl2.dac_dc2 = offset ? offset : (-128 - offset);
|
|
}
|
|
}
|
|
|
|
/************************************/
|
|
/* DAC DMA API's */
|
|
/************************************/
|
|
/**
|
|
* Enable DAC output data from I2S DMA.
|
|
* I2S_CLK connect to DAC_CLK, I2S_DATA_OUT connect to DAC_DATA.
|
|
*/
|
|
static inline void dac_ll_dma_enable(void)
|
|
{
|
|
SENS.sar_dac_ctrl1.dac_dig_force = 1;
|
|
}
|
|
|
|
/**
|
|
* Disable DAC output data from I2S DMA.
|
|
*/
|
|
static inline void dac_ll_dma_disable(void)
|
|
{
|
|
SENS.sar_dac_ctrl1.dac_dig_force = 0;
|
|
} |