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https://github.com/espressif/esp-idf.git
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143 lines
3.4 KiB
C
143 lines
3.4 KiB
C
/*
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* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/*******************************************************************************
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* NOTICE
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* The ll is not public api, don't use in application code.
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* See readme.md in hal/include/hal/readme.md
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******************************************************************************/
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#pragma once
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#include <stdint.h>
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#include <stdbool.h>
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#include "esp_bit_defs.h"
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#include "hal/assert.h"
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#include "soc/pmu_struct.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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* LDO capabilities
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*/
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#define LDO_LL_UNIT_NUM 4
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/**
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* LDO LL macros, these macros are in the unit of mV
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*/
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#define LDO_LL_EXT_LDO_DREF_VOL_H_BASE 1000
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#define LDO_LL_EXT_LDO_DREF_VOL_H_STEP 100
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#define LDO_LL_EXT_LDO_DREF_VOL_L_BASE 500
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#define LDO_LL_EXT_LDO_DREF_VOL_L_STEP 50
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#define LDO_LL_EXT_LDO_MUL_VOL_BASE 1000
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#define LDO_LL_EXT_LDO_MUL_VOL_STEP 250
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/**
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* Trick to be adapted to the LDO register structure
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*
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* In pmu_ext_ldo_info_t ext_ldo[6] registers:
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* - ext_ldo[0] is LDO1
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* - ext_ldo[3] is LDO2
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* - ext_ldo[1] is LDO3
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* - ext_ldo[4] is LDO4
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*/
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#define LDO_ID2INDEX(id) (uint8_t[]){0,3,1,4}[id]
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/**
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* @brief Enable a LDO
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*
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* @param ldo_id LDO ID
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* @param enable True: enable; False: disable
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*/
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__attribute__((always_inline))
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static inline void ldo_ll_enable(int ldo_id, bool enable)
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{
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HAL_ASSERT(ldo_id < LDO_LL_UNIT_NUM);
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PMU.ext_ldo[LDO_ID2INDEX(ldo_id)].pmu_ext_ldo.xpd = enable;
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}
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/**
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* @brief Enable a LDO
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*
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* @param ldo_id LDO ID
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* @param voltage_mv Voltage in mV
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*/
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__attribute__((always_inline))
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static inline void ldo_ll_set_output_voltage_mv(int ldo_id, int voltage_mv)
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{
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int dref = 0, mul = 0;
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/**
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* Vout = dref * mul
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*
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* mul reg[2:0]:
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* mul = 1~2.75, step = 0.25
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* dref reg[3:0]:
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* 0~8 : dref = 0.5V ~ 0.9V, step 50mV
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* 9~15 : dref = 1.0V ~ 1.6V, step 100mV
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*/
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if (voltage_mv <= 500) {
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dref = 0;
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mul = 0;
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} else if (voltage_mv <= 900) {
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mul = 0;
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dref = (voltage_mv - LDO_LL_EXT_LDO_DREF_VOL_L_BASE) / LDO_LL_EXT_LDO_DREF_VOL_L_STEP;
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} else if (voltage_mv <= 1600) {
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mul = 1;
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dref = 6 + (voltage_mv - LDO_LL_EXT_LDO_DREF_VOL_H_BASE) / LDO_LL_EXT_LDO_DREF_VOL_H_STEP;
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} else if (voltage_mv <= 2000) {
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mul = 4;
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dref = (voltage_mv / 2 - LDO_LL_EXT_LDO_DREF_VOL_L_BASE) / LDO_LL_EXT_LDO_DREF_VOL_L_STEP;
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} else if (voltage_mv <= 3200) {
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mul = 4;
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dref = 9 + (voltage_mv / 2 - LDO_LL_EXT_LDO_DREF_VOL_H_BASE) / LDO_LL_EXT_LDO_DREF_VOL_H_STEP;
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} else {
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mul = 7;
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dref = 15;
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}
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if (mul > 7) {
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mul = 7;
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}
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if (mul < 0) {
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mul = 0;
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}
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if (dref > 15) {
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dref = 15;
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}
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if (dref < 0) {
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dref = 0;
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}
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/**
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* tieh_sel:
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* - 0: tieh;
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* - 1: sdmmc0_tieh;
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* - 2: 3.3V;
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* - 3: sdmmc1_tieh;
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*
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* tieh:
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* - 0: dref * mul
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* - 1: 3.3V
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*
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* force_tieh_sel:
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* - 0: efuse
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* - 1: tieh_sel
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*/
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PMU.ext_ldo[LDO_ID2INDEX(ldo_id)].pmu_ext_ldo.tieh_sel = 0;
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PMU.ext_ldo[LDO_ID2INDEX(ldo_id)].pmu_ext_ldo.tieh = 0;
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PMU.ext_ldo[LDO_ID2INDEX(ldo_id)].pmu_ext_ldo.force_tieh_sel = 1;
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PMU.ext_ldo[LDO_ID2INDEX(ldo_id)].pmu_ext_ldo_ana.dref = dref;
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PMU.ext_ldo[LDO_ID2INDEX(ldo_id)].pmu_ext_ldo_ana.mul = mul;
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}
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#ifdef __cplusplus
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}
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#endif
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