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Update lightmeter

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MX
2023-07-13 23:32:41 +03:00
parent 0cbbe1ac0a
commit fd778be03c
10 changed files with 154 additions and 37 deletions
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27
applications/external/lightmeter/lib/MAX44009/MAX44009.c vendored Normal file
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#include <MAX44009.h>
#include <math.h>
#include <furi.h>
void max44009_init() {
furi_hal_i2c_acquire(I2C_BUS);
furi_hal_i2c_write_reg_8(I2C_BUS, MAX44009_ADDR,
MAX44009_REG_CONFIG, MAX44009_REG_CONFIG_CONT_MODE, I2C_TIMEOUT);
furi_hal_i2c_release(I2C_BUS);
}
int max44009_read_light(float* result) {
uint8_t data_one = 0;
uint8_t exp, mantissa;
int status;
furi_hal_i2c_acquire(I2C_BUS);
furi_hal_i2c_read_reg_8(I2C_BUS, MAX44009_ADDR, MAX44009_REG_LUX_HI, &data_one, I2C_TIMEOUT);
exp = (data_one & MAX44009_REG_LUX_HI_EXP_MASK) >> 4;
mantissa = (data_one & MAX44009_REG_LUX_HI_MANT_HI_MASK) << 4;
status = furi_hal_i2c_read_reg_8(I2C_BUS, MAX44009_ADDR, MAX44009_REG_LUX_LO, &data_one, I2C_TIMEOUT);
mantissa |= (data_one & MAX44009_REG_LUX_LO_MANT_LO_MASK);
furi_hal_i2c_release(I2C_BUS);
*result = (float)pow(2, exp) * mantissa * 0.045;
FURI_LOG_D("MAX44009", "exp %d, mant %d, lux %f", exp, mantissa, (double)*result);
return status;
}