mirror of
https://github.com/espressif/esp-idf.git
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4fde033a5f
This commit adds support for using the RTC I2C peripheral on the ULP RISC-V core for esp32s2 and esp32s3. It also adds an example to demonstrate the usage of the RTC I2C peripheral. This commit also modifies the rtc_i2c register structure files to enable the use of bitfields in the ULP RISC-V RTC I2C driver.
223 lines
8.8 KiB
C
223 lines
8.8 KiB
C
/*
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* SPDX-FileCopyrightText: 2020-2022 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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#pragma once
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef volatile struct rtc_i2c_dev_s {
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union {
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struct {
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uint32_t period: 20; /*time period that scl = 0*/
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uint32_t reserved20: 12;
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};
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uint32_t val;
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} scl_low;
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union {
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struct {
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uint32_t sda_force_out: 1; /*1=push pull 0=open drain*/
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uint32_t scl_force_out: 1; /*1=push pull 0=open drain*/
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uint32_t ms_mode: 1; /*1=master 0=slave*/
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uint32_t trans_start: 1; /*force start*/
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uint32_t tx_lsb_first: 1; /*transit lsb first*/
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uint32_t rx_lsb_first: 1; /*receive lsb first*/
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uint32_t reserved6: 23;
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uint32_t i2c_ctrl_clk_gate_en: 1;
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uint32_t i2c_reset: 1; /*rtc i2c sw reset*/
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uint32_t i2cclk_en: 1; /*rtc i2c reg clk gating*/
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};
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uint32_t val;
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} ctrl;
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union {
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struct {
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uint32_t ack_rec: 1; /*ack response*/
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uint32_t slave_rw: 1; /*slave read or write*/
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uint32_t arb_lost: 1; /*arbitration is lost*/
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uint32_t bus_busy: 1; /*bus is busy*/
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uint32_t slave_addressed: 1; /*slave reg sub address*/
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uint32_t byte_trans: 1; /*One byte transit done*/
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uint32_t op_cnt: 2; /*which operation is working*/
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uint32_t reserved8: 8;
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uint32_t shift: 8; /*shifter content*/
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uint32_t scl_main_state_last: 3; /*i2c last main status*/
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uint32_t reserved27: 1;
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uint32_t scl_state_last: 3; /*scl last status*/
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uint32_t reserved31: 1;
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};
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uint32_t val;
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} status;
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union {
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struct {
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uint32_t time_out: 20; /*time out threshold*/
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uint32_t reserved20:12;
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};
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uint32_t val;
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} timeout;
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union {
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struct {
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uint32_t addr: 15; /*slave address*/
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uint32_t reserved15: 16;
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uint32_t en_10bit: 1; /*i2c 10bit mode enable*/
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};
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uint32_t val;
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} slave_addr;
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union {
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struct {
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uint32_t period: 20; /*time period that scl = 1*/
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uint32_t reserved20: 12;
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};
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uint32_t val;
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} scl_high;
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union {
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struct {
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uint32_t sda_duty_num:20; /*time period for SDA to toggle after SCL goes low*/
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uint32_t reserved20: 12;
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};
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uint32_t val;
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} sda_duty;
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union {
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struct {
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uint32_t scl_start_period:20; /*time period for SCL to toggle after I2C start is triggered*/
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uint32_t reserved20: 12;
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};
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uint32_t val;
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} scl_start_period;
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union {
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struct {
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uint32_t scl_stop_period:20; /*time period for SCL to stop after I2C end is triggered*/
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uint32_t reserved20: 12;
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};
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uint32_t val;
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} scl_stop_period;
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union {
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struct {
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uint32_t slave_tran_comp: 1; /*clear slave transit complete interrupt*/
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uint32_t arbitration_lost: 1; /*clear arbitration lost interrupt*/
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uint32_t master_tran_comp: 1; /*clear master transit complete interrupt*/
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uint32_t trans_complete: 1; /*clear transit complete interrupt*/
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uint32_t time_out: 1; /*clear time out interrupt*/
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uint32_t ack_err: 1; /*clear ack error interrupt*/
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uint32_t rx_data: 1; /*clear receive data interrupt*/
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uint32_t tx_data: 1; /*clear transit load data complete interrupt*/
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uint32_t detect_start: 1; /*clear detect start interrupt*/
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uint32_t reserved9: 23;
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};
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uint32_t val;
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} int_clr;
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union {
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struct {
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uint32_t slave_tran_comp: 1; /*slave transit complete interrupt raw*/
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uint32_t arbitration_lost: 1; /*arbitration lost interrupt raw*/
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uint32_t master_tran_comp: 1; /*master transit complete interrupt raw*/
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uint32_t trans_complete: 1; /*transit complete interrupt raw*/
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uint32_t time_out: 1; /*time out interrupt raw*/
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uint32_t ack_err: 1; /*ack error interrupt raw*/
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uint32_t rx_data: 1; /*receive data interrupt raw*/
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uint32_t tx_data: 1; /*transit data interrupt raw*/
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uint32_t detect_start: 1; /*detect start interrupt raw*/
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uint32_t reserved9: 23;
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};
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uint32_t val;
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} int_raw;
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union {
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struct {
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uint32_t slave_tran_comp: 1; /*slave transit complete interrupt state*/
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uint32_t arbitration_lost: 1; /*arbitration lost interrupt state*/
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uint32_t master_tran_comp: 1; /*master transit complete interrupt state*/
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uint32_t trans_complete: 1; /*transit complete interrupt state*/
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uint32_t time_out: 1; /*time out interrupt state*/
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uint32_t ack_err: 1; /*ack error interrupt state*/
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uint32_t rx_data: 1; /*receive data interrupt state*/
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uint32_t tx_data: 1; /*transit data interrupt state*/
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uint32_t detect_start: 1; /*detect start interrupt state*/
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uint32_t reserved9: 23;
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};
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uint32_t val;
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} int_st;
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union {
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struct {
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uint32_t slave_tran_comp: 1; /*enable slave transit complete interrupt*/
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uint32_t arbitration_lost: 1; /*enable arbitration lost interrupt*/
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uint32_t master_tran_comp: 1; /*enable master transit complete interrupt*/
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uint32_t trans_complete: 1; /*enable transit complete interrupt*/
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uint32_t time_out: 1; /*enable time out interrupt*/
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uint32_t ack_err: 1; /*enable eack error interrupt*/
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uint32_t rx_data: 1; /*enable receive data interrupt*/
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uint32_t tx_data: 1; /*enable transit data interrupt*/
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uint32_t detect_start: 1; /*enable detect start interrupt*/
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uint32_t reserved9: 23;
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};
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uint32_t val;
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} int_ena;
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union {
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struct {
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uint32_t i2c_rdata: 8; /*data received*/
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uint32_t slave_tx_data: 8; /*data sent by slave*/
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uint32_t reserved16: 15;
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uint32_t i2c_done: 1; /*i2c done*/
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};
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uint32_t val;
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} fifo_data;
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union {
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struct {
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uint32_t byte_num: 8;
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uint32_t ack_en: 1;
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uint32_t ack_exp: 1;
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uint32_t ack_val: 1;
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uint32_t op_code: 3;
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uint32_t reserved14: 17;
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uint32_t done: 1; /*command0_done*/
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};
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uint32_t val;
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} command[16];
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uint32_t reserved_78;
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uint32_t reserved_7c;
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uint32_t reserved_80;
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uint32_t reserved_84;
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uint32_t reserved_88;
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uint32_t reserved_8c;
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uint32_t reserved_90;
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uint32_t reserved_94;
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uint32_t reserved_98;
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uint32_t reserved_9c;
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uint32_t reserved_a0;
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uint32_t reserved_a4;
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uint32_t reserved_a8;
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uint32_t reserved_ac;
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uint32_t reserved_b0;
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uint32_t reserved_b4;
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uint32_t reserved_b8;
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uint32_t reserved_bc;
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uint32_t reserved_c0;
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uint32_t reserved_c4;
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uint32_t reserved_c8;
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uint32_t reserved_cc;
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uint32_t reserved_d0;
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uint32_t reserved_d4;
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uint32_t reserved_d8;
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uint32_t reserved_dc;
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uint32_t reserved_e0;
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uint32_t reserved_e4;
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uint32_t reserved_e8;
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uint32_t reserved_ec;
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uint32_t reserved_f0;
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uint32_t reserved_f4;
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uint32_t reserved_f8;
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union {
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struct {
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uint32_t i2c_date: 28;
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uint32_t reserved28: 4;
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};
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uint32_t val;
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} date;
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} rtc_i2c_dev_t;
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extern rtc_i2c_dev_t RTC_I2C;
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#ifdef __cplusplus
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}
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#endif
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