mirror of
https://github.com/Lurkars/esp-ena.git
synced 2024-11-23 02:16:12 +01:00
112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
// Copyright 2020 Lukas Haubaum
|
|
//
|
|
// Licensed under the GNU Affero General Public License, Version 3;
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
|
|
// https://www.gnu.org/licenses/agpl-3.0.html
|
|
//
|
|
// 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.
|
|
#include <stdio.h>
|
|
#include <time.h>
|
|
|
|
#include "driver/i2c.h"
|
|
#include "esp_log.h"
|
|
|
|
#include "rtc.h"
|
|
#include "i2c-main.h"
|
|
|
|
#include "bm8563.h"
|
|
|
|
uint8_t bm8563_dec2bcd(uint8_t value)
|
|
{
|
|
return (((value / 10) << 4) | (value % 10));
|
|
}
|
|
|
|
uint8_t bm8563_bcd2dec(uint8_t value)
|
|
{
|
|
return (((value >> 4) * 10) + (value & 0x0f));
|
|
}
|
|
|
|
/**
|
|
* @brief Read time
|
|
*/
|
|
void rtc_get_time(struct tm *time)
|
|
{
|
|
if (!i2c_is_initialized())
|
|
{
|
|
i2c_main_init();
|
|
}
|
|
uint8_t data[7];
|
|
|
|
i2c_cmd_handle_t cmd;
|
|
cmd = i2c_cmd_link_create();
|
|
i2c_master_start(cmd);
|
|
i2c_master_write_byte(cmd, (BM8563_ADDRESS << 1) | I2C_MASTER_WRITE, true);
|
|
i2c_master_write_byte(cmd, BM8563_SECONDS, true);
|
|
i2c_master_start(cmd);
|
|
i2c_master_write_byte(cmd, (BM8563_ADDRESS << 1) | I2C_MASTER_READ, true);
|
|
i2c_master_read(cmd, data, 7, I2C_MASTER_LAST_NACK);
|
|
i2c_master_stop(cmd);
|
|
ESP_ERROR_CHECK_WITHOUT_ABORT(i2c_master_cmd_begin(I2C_NUM_0, cmd, 10 / portTICK_PERIOD_MS));
|
|
i2c_cmd_link_delete(cmd);
|
|
|
|
time->tm_sec = bm8563_bcd2dec(data[0] & 0b01111111);
|
|
time->tm_min = bm8563_bcd2dec(data[1] & 0b01111111);
|
|
time->tm_hour = bm8563_bcd2dec(data[2] & 0b00111111);
|
|
time->tm_mday = bm8563_bcd2dec(data[3] & 0b00111111);
|
|
time->tm_wday = bm8563_bcd2dec(data[4] & 0b00000111);
|
|
time->tm_mon = bm8563_bcd2dec(data[5] & 0b00011111) - 1;
|
|
if (data[5] & BM8563_CENTURY_BIT)
|
|
{
|
|
time->tm_year = bm8563_bcd2dec(data[6] & 0b11111111) + 100;
|
|
}
|
|
else
|
|
{
|
|
time->tm_year = bm8563_bcd2dec(data[6] & 0b01111111);
|
|
}
|
|
time->tm_isdst = 0;
|
|
|
|
mktime(time);
|
|
}
|
|
|
|
/**
|
|
* @brief Write time
|
|
*/
|
|
void rtc_set_time(struct tm *time)
|
|
{
|
|
if (!i2c_is_initialized())
|
|
{
|
|
i2c_main_init();
|
|
}
|
|
|
|
uint8_t data[7] = {0};
|
|
data[0] = bm8563_dec2bcd(time->tm_sec) & 0b01111111;
|
|
data[1] = bm8563_dec2bcd(time->tm_min) & 0b01111111;
|
|
data[2] = bm8563_dec2bcd(time->tm_hour) & 0b00111111;
|
|
data[3] = bm8563_dec2bcd(time->tm_mday) & 0b00111111;
|
|
data[4] = bm8563_dec2bcd(time->tm_wday) & 0b00000111;
|
|
data[5] = bm8563_dec2bcd(time->tm_mon + 1) & 0b00011111;
|
|
if (time->tm_year > 100)
|
|
{
|
|
data[5] |= BM8563_CENTURY_BIT;
|
|
}
|
|
|
|
data[6] = bm8563_dec2bcd(time->tm_year % 100) & 0b11111111;
|
|
|
|
i2c_cmd_handle_t cmd;
|
|
cmd = i2c_cmd_link_create();
|
|
i2c_master_start(cmd);
|
|
i2c_master_write_byte(cmd, (BM8563_ADDRESS << 1) | I2C_MASTER_WRITE, true);
|
|
|
|
i2c_master_write_byte(cmd, BM8563_SECONDS, true);
|
|
i2c_master_write(cmd, data, 7, true);
|
|
|
|
i2c_master_stop(cmd);
|
|
ESP_ERROR_CHECK_WITHOUT_ABORT(i2c_master_cmd_begin(I2C_NUM_0, cmd, 10 / portTICK_PERIOD_MS));
|
|
i2c_cmd_link_delete(cmd);
|
|
} |