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Add support of SPS30 sensor to envsensor.
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| * This file is part of smarthomatic, http://www.smarthomatic.org. | ||
| * Copyright (c) 2019 Uwe Freese | ||
| * | ||
| * smarthomatic is free software: you can redistribute it and/or modify it | ||
| * under the terms of the GNU General Public License as published by the | ||
| * Free Software Foundation, either version 3 of the License, or (at your | ||
| * option) any later version. | ||
| * | ||
| * smarthomatic is distributed in the hope that it will be useful, but | ||
| * WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General | ||
| * Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License along | ||
| * with smarthomatic. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
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| #include "sps30.h" | ||
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| #include "config.h" | ||
| #include "i2c.h" | ||
| #include "../src_common/uart.h" // for debugging only | ||
| #include "../src_common/util.h" | ||
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| #define REG_CMD 0x00 | ||
| #define REG_RANGE_HIGH_BYTE 0x02 | ||
| #define REG_RANGE_LOW_BYTE 0x03 | ||
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| #define CMD_START_MEASUREMENT 0x0010 | ||
| #define CMD_STOP_MEASUREMENT 0x0104 | ||
| #define CMD_READ_DATA_READY_FLAG 0x0202 | ||
| #define CMD_READ_MEASURED_VALUES 0x0300 | ||
| #define CMD_READ_WRITE_AUTO_CLEANING_INTERVAL 0x8004 | ||
| #define CMD_START_FAN_CLEANING 0x5607 | ||
| #define CMD_READ_ARTICLE_CODE 0xD025 | ||
| #define CMD_READ_SERIAL_NUMBER 0xD033 | ||
| #define CMD_RESET 0xD304 | ||
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| //----------------------------------------------------------------------------- | ||
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| uint8_t calc_crc(uint8_t data[2]) | ||
| { | ||
| uint8_t crc = 0xFF; | ||
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| for(int i = 0; i < 2; i++) | ||
| { | ||
| crc ^= data[i]; | ||
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| for (uint8_t bit = 8; bit > 0; --bit) | ||
| { | ||
| if (crc & 0x80) | ||
| { | ||
| crc = (crc << 1) ^ 0x31u; | ||
| } | ||
| else | ||
| { | ||
| crc = (crc << 1); | ||
| } | ||
| } | ||
| } | ||
|
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| return crc; | ||
| } | ||
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| void sps30_start_measurement(void) | ||
| { | ||
| uint8_t data[2] = {0x03, 0x00}; | ||
| uint8_t crc = calc_crc(data); | ||
| uint8_t cmd[5] = {CMD_START_MEASUREMENT >> 8, CMD_START_MEASUREMENT & 0xff, 0x03, 0x00, crc}; | ||
| i2c_write(SPS30_I2C_ADR, cmd, 5); | ||
| i2c_stop(); | ||
| } | ||
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| void sps30_stop_measurement(void) | ||
| { | ||
| uint8_t cmd[2] = {CMD_STOP_MEASUREMENT >> 8, CMD_STOP_MEASUREMENT & 0xff}; | ||
| i2c_write(SPS30_I2C_ADR, cmd, 2); | ||
| i2c_stop(); | ||
| } | ||
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| bool sps30_read_data_ready(void) | ||
| { | ||
| uint8_t cmd[2] = {CMD_READ_DATA_READY_FLAG >> 8, CMD_READ_DATA_READY_FLAG & 0xff}; | ||
| uint8_t data[3]; | ||
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| i2c_write(SPS30_I2C_ADR, cmd, 2); | ||
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| // Device needs i2c_stop and some dalay between ic2_write and i2c_read. | ||
| // Otherwise, values were all 0xff. | ||
| i2c_stop(); | ||
| _delay_ms(50); | ||
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| i2c_read(SPS30_I2C_ADR, data, 3); | ||
| i2c_stop(); | ||
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| uint8_t crc = calc_crc(data); | ||
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| return (crc == data[2]) && data[1]; | ||
| } | ||
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| uint8_t sps30_data[60]; | ||
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| // Read the measured values. | ||
| // Call after data is ready (check with sps30_read_data_ready). | ||
| bool sps30_read_measured_values(void) | ||
| { | ||
| uint8_t cmd[2] = {CMD_READ_MEASURED_VALUES >> 8, CMD_READ_MEASURED_VALUES & 0xff}; | ||
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| i2c_write(SPS30_I2C_ADR, cmd, 2); | ||
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| // Device needs i2c_stop and some dalay between ic2_write and i2c_read. | ||
| // Otherwise, values were all 0xff. | ||
| i2c_stop(); | ||
| _delay_ms(50); | ||
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| i2c_read(SPS30_I2C_ADR, sps30_data, 60); | ||
| i2c_stop(); | ||
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| // Check CRCs. If wrong, abort. | ||
| for (uint8_t i = 0; i < 60; i += 3) | ||
| { | ||
| if (calc_crc(&sps30_data[i]) != sps30_data[i + 2]) | ||
| { | ||
| return false; | ||
| } | ||
| } | ||
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| return true; | ||
| } | ||
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| float sps30_get_measured_value(uint8_t pos) | ||
| { | ||
| float2uint32.uint32Val = | ||
| (((uint32_t)sps30_data[pos * 6]) << 24) | ||
| | (((uint32_t)sps30_data[pos * 6 + 1]) << 16) | ||
| | (((uint32_t)sps30_data[pos * 6 + 3]) << 8) | ||
| | (((uint32_t)sps30_data[pos * 6 + 4]) << 0); | ||
|
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| return float2uint32.floatVal; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| /* | ||
| * This file is part of smarthomatic, http://www.smarthomatic.org. | ||
| * Copyright (c) 2019 Uwe Freese | ||
| * | ||
| * smarthomatic is free software: you can redistribute it and/or modify it | ||
| * under the terms of the GNU General Public License as published by the | ||
| * Free Software Foundation, either version 3 of the License, or (at your | ||
| * option) any later version. | ||
| * | ||
| * smarthomatic is distributed in the hope that it will be useful, but | ||
| * WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General | ||
| * Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License along | ||
| * with smarthomatic. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
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| #include "../src_common/util.h" | ||
|
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| #define SPS30_I2C_ADR 0x69 | ||
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| void sps30_start_measurement(void); | ||
| void sps30_stop_measurement(void); | ||
| bool sps30_read_data_ready(void); | ||
| bool sps30_read_measured_values(void); | ||
| float sps30_get_measured_value(uint8_t pos); |
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