mirror of
https://github.com/Lurkars/esp-ena.git
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112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
// 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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} |