mirror of
https://github.com/Lurkars/esp-ena.git
synced 2026-05-08 20:10:37 +02:00
updated interface, added M5Stick (PLUS) support
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Lurkars
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idf_component_register(
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SRCS
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"bm8563.c"
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INCLUDE_DIRS "."
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PRIV_REQUIRES
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rtc
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i2c-main
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)
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// Copyright 2020 Lukas Haubaum
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//
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// Licensed under the GNU Affero General Public License, Version 3;
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// https://www.gnu.org/licenses/agpl-3.0.html
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <stdio.h>
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#include <time.h>
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#include "driver/i2c.h"
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#include "esp_log.h"
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#include "rtc.h"
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#include "i2c-main.h"
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#include "bm8563.h"
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uint8_t bm8563_dec2bcd(uint8_t value)
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{
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return (((value / 10) << 4) | (value % 10));
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}
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uint8_t bm8563_bcd2dec(uint8_t value)
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{
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return (((value >> 4) * 10) + (value & 0x0f));
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}
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/**
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* @brief Read time
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*/
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void rtc_get_time(struct tm *time)
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{
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if (!i2c_is_initialized())
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{
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i2c_main_init();
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}
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uint8_t data[7];
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i2c_cmd_handle_t cmd;
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cmd = i2c_cmd_link_create();
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i2c_master_start(cmd);
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i2c_master_write_byte(cmd, (BM8563_ADDRESS << 1) | I2C_MASTER_WRITE, true);
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i2c_master_write_byte(cmd, BM8563_SECONDS, true);
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i2c_master_start(cmd);
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i2c_master_write_byte(cmd, (BM8563_ADDRESS << 1) | I2C_MASTER_READ, true);
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i2c_master_read(cmd, data, 7, I2C_MASTER_LAST_NACK);
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i2c_master_stop(cmd);
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ESP_ERROR_CHECK_WITHOUT_ABORT(i2c_master_cmd_begin(I2C_NUM_0, cmd, 10 / portTICK_PERIOD_MS));
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i2c_cmd_link_delete(cmd);
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time->tm_sec = bm8563_bcd2dec(data[0] & 0b01111111);
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time->tm_min = bm8563_bcd2dec(data[1] & 0b01111111);
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time->tm_hour = bm8563_bcd2dec(data[2] & 0b00111111);
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time->tm_mday = bm8563_bcd2dec(data[3] & 0b00111111);
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time->tm_wday = bm8563_bcd2dec(data[4] & 0b00000111);
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time->tm_mon = bm8563_bcd2dec(data[5] & 0b00011111) - 1;
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if (data[5] & BM8563_CENTURY_BIT)
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{
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time->tm_year = bm8563_bcd2dec(data[6] & 0b11111111) + 100;
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}
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else
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{
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time->tm_year = bm8563_bcd2dec(data[6] & 0b01111111);
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}
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time->tm_isdst = 0;
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mktime(time);
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}
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/**
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* @brief Write time
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*/
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void rtc_set_time(struct tm *time)
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{
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if (!i2c_is_initialized())
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{
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i2c_main_init();
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}
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uint8_t data[7] = {0};
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data[0] = bm8563_dec2bcd(time->tm_sec) & 0b01111111;
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data[1] = bm8563_dec2bcd(time->tm_min) & 0b01111111;
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data[2] = bm8563_dec2bcd(time->tm_hour) & 0b00111111;
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data[3] = bm8563_dec2bcd(time->tm_mday) & 0b00111111;
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data[4] = bm8563_dec2bcd(time->tm_wday) & 0b00000111;
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data[5] = bm8563_dec2bcd(time->tm_mon + 1) & 0b00011111;
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if (time->tm_year > 100)
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{
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data[5] |= BM8563_CENTURY_BIT;
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}
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data[6] = bm8563_dec2bcd(time->tm_year % 100) & 0b11111111;
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i2c_cmd_handle_t cmd;
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cmd = i2c_cmd_link_create();
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i2c_master_start(cmd);
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i2c_master_write_byte(cmd, (BM8563_ADDRESS << 1) | I2C_MASTER_WRITE, true);
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i2c_master_write_byte(cmd, BM8563_SECONDS, true);
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i2c_master_write(cmd, data, 7, true);
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i2c_master_stop(cmd);
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ESP_ERROR_CHECK_WITHOUT_ABORT(i2c_master_cmd_begin(I2C_NUM_0, cmd, 10 / portTICK_PERIOD_MS));
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i2c_cmd_link_delete(cmd);
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}
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@@ -0,0 +1,80 @@
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// Copyright 2020 Lukas Haubaum
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//
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// Licensed under the GNU Affero General Public License, Version 3;
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// https://www.gnu.org/licenses/agpl-3.0.html
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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* @file
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*
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* @brief I2C driver for BM8563 RTC
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*
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*/
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#ifndef _RTC_BM8562_H_
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#define _RTC_BM8562_H_
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#include "stdio.h"
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#include <time.h>
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#define BM8563_ADDRESS 0x51
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#define BM8563_CONTROL_STATUS1 0x00
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#define BM8563_TESTC 0b00001000
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#define BM8563_STOP 0b00100000
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#define BM8563_TEST1 0b10000000
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#define BM8563_CONTROL_STATUS2 0x01
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#define BM8563_TIE 0b00000001
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#define BM8563_AIE 0b00000010
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#define BM8563_TF 0b00000100
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#define BM8563_AF 0b00001000
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#define BM8563_TI_TP 0b00010000
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#define BM8563_SECONDS 0x02
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#define BM8563_MINUTES 0x03
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#define BM8563_HOURS 0x04
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#define BM8563_DAY 0x05
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#define BM8563_WEEKDAY 0x06
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#define BM8563_MONTH 0x07
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#define BM8563_YEAR 0x08
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#define BM8563_TIME_SIZE 0x07
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#define BM8563_CENTURY_BIT 0b10000000
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#define BM8563_MINUTE_ALARM 0x09
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#define BM8563_HOUR_ALARM 0x0a
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#define BM8563_DAY_ALARM 0x0b
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#define BM8563_WEEKDAY_ALARM 0x0c
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#define BM8563_ALARM_DISABLE 0b10000000
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#define BM8563_ALARM_NONE 0xff
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#define BM8563_ALARM_SIZE 0x04
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#define BM8563_TIMER_CONTROL 0x0e
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#define BM8563_TIMER_ENABLE 0b10000000
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#define BM8563_TIMER_4_096KHZ 0b00000000
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#define BM8563_TIMER_64HZ 0b00000001
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#define BM8563_TIMER_1HZ 0b00000010
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#define BM8563_TIMER_1_60HZ 0b00000011
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#define BM8563_TIMER 0x0f
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#define BM8563_ALARM_SET 0x0900
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#define BM8563_ALARM_READ 0x0901
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#define BM8563_CONTROL_STATUS1_READ 0x0000
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#define BM8563_CONTROL_STATUS1_WRITE 0x0001
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#define BM8563_CONTROL_STATUS2_READ 0x0100
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#define BM8563_CONTROL_STATUS2_WRITE 0x0101
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#define BM8563_TIMER_CONTROL_READ 0x0e00
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#define BM8563_TIMER_CONTROL_WRITE 0x0e01
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#define BM8563_TIMER_READ 0x0f00
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#define BM8563_TIMER_WRITE 0x0f01
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/* Status codes. */
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#define BM8563_ERROR_NOTTY (-1)
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#define BM8563_OK (0x00)
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#define BM8563_ERR_LOW_VOLTAGE (0x80)
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#endif
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