esp-idf/components/soc/src/esp32/i2c_rtc_clk.h

// Copyright 2015-2017 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.

#pragma once

#include "i2c_apll.h"
#include "i2c_bbpll.h"

#ifdef __cplusplus
extern "C" {
#endif

/* Analog function control register */
#define ANA_CONFIG_REG  0x6000E044
#define ANA_CONFIG_S    (8)
#define ANA_CONFIG_M    (0x3FF)
/* Clear to enable APLL */
#define I2C_APLL_M      (BIT(14))
/* Clear to enable BBPLL */
#define I2C_BBPLL_M     (BIT(17))

/* ROM functions which read/write internal control bus */
uint8_t rom_i2c_readReg(uint8_t block, uint8_t host_id, uint8_t reg_add);
uint8_t rom_i2c_readReg_Mask(uint8_t block, uint8_t host_id, uint8_t reg_add, uint8_t msb, uint8_t lsb);
void rom_i2c_writeReg(uint8_t block, uint8_t host_id, uint8_t reg_add, uint8_t data);
void rom_i2c_writeReg_Mask(uint8_t block, uint8_t host_id, uint8_t reg_add, uint8_t msb, uint8_t lsb, uint8_t data);

/* Convenience macros for the above functions, these use register definitions
 * from i2c_apll.h/i2c_bbpll.h header files.
 */
#define I2C_WRITEREG_MASK_RTC(block, reg_add, indata) \
      rom_i2c_writeReg_Mask(block, block##_HOSTID,  reg_add,  reg_add##_MSB,  reg_add##_LSB,  indata)

#define I2C_READREG_MASK_RTC(block, reg_add) \
      rom_i2c_readReg_Mask(block, block##_HOSTID,  reg_add,  reg_add##_MSB,  reg_add##_LSB)

#define I2C_WRITEREG_RTC(block, reg_add, indata) \
      rom_i2c_writeReg(block, block##_HOSTID,  reg_add, indata)

#define I2C_READREG_RTC(block, reg_add) \
      rom_i2c_readReg(block, block##_HOSTID,  reg_add)


#ifdef __cplusplus
}
#endif