mirror of
https://github.com/CTCaer/hekate
synced 2024-07-03 06:53:29 +00:00
als: Update ambient light sensor driver to use integers
Additionally separate calibration so later Aula one can be used
This commit is contained in:
CTCaer
parent
a959196c2a
commit
1f4f41b6e6
146
bdk/input/als.c
146
bdk/input/als.c
|
|
@ -23,79 +23,117 @@
|
|||
#include <soc/pinmux.h>
|
||||
#include <utils/util.h>
|
||||
|
||||
#define HOS_GAIN BH1730_GAIN_64X
|
||||
#define HOS_ITIME 38
|
||||
#define BH1730_DEFAULT_GAIN BH1730_GAIN_64X
|
||||
#define BH1730_DEFAULT_ICYCLE 38
|
||||
|
||||
void set_als_cfg(als_table_t *als_val, u8 gain, u8 itime)
|
||||
#define BH1730_INTERNAL_CLOCK_NS 2800
|
||||
#define BH1730_ADC_CALC_DELAY_US 2000 /* BH1730_INTERNAL_CLOCK_MS * 714 */
|
||||
#define BH1730_ITIME_CYCLE_TO_US 2700 /* BH1730_INTERNAL_CLOCK_MS * 964 */
|
||||
|
||||
#define BH1730_DEFAULT_ITIME_MS 100
|
||||
|
||||
#define BH1730_LUX_MULTIPLIER 3600
|
||||
#define BH1730_LUX_MULTIPLIER_AULA 1410
|
||||
|
||||
#define BH1730_LUX_MAX 100000
|
||||
|
||||
typedef struct _opt_win_cal_t
|
||||
{
|
||||
i2c_send_byte(I2C_2, BH1730_I2C_ADDR, BH1730_ADDR(BH1730_GAIN_REG), gain);
|
||||
i2c_send_byte(I2C_2, BH1730_I2C_ADDR, BH1730_ADDR(BH1730_TIMING_REG), (256 - itime));
|
||||
u32 rc;
|
||||
u32 cv;
|
||||
u32 ci;
|
||||
} opt_win_cal_t;
|
||||
|
||||
als_val->gain = gain;
|
||||
als_val->itime = itime;
|
||||
// Nintendo Switch Icosa/Iowa Optical Window calibration.
|
||||
const opt_win_cal_t opt_win_cal_default[] = {
|
||||
{ 500, 5002, 7502 },
|
||||
{ 754, 2250, 2000 },
|
||||
{ 1029, 1999, 1667 },
|
||||
{ 1373, 884, 583 },
|
||||
{ 1879, 309, 165 }
|
||||
};
|
||||
|
||||
// Nintendo Switch Aula Optical Window calibration.
|
||||
const opt_win_cal_t opt_win_cal_aula[] = {
|
||||
{ 231, 9697, 30300 },
|
||||
{ 993, 3333, 2778 },
|
||||
{ 1478, 1621, 1053 },
|
||||
{ 7500, 81, 10 }
|
||||
};
|
||||
|
||||
const u32 als_gain_idx_tbl[4] = { 1, 2, 64, 128 };
|
||||
|
||||
void set_als_cfg(als_ctxt_t *als_ctxt, u8 gain, u8 cycle)
|
||||
{
|
||||
if (gain > BH1730_GAIN_128X)
|
||||
gain = BH1730_GAIN_128X;
|
||||
|
||||
if (!cycle)
|
||||
cycle = 1;
|
||||
else if (cycle > 255)
|
||||
cycle = 255;
|
||||
|
||||
i2c_send_byte(I2C_2, BH1730_I2C_ADDR, BH1730_ADDR(BH1730_GAIN_REG), gain);
|
||||
i2c_send_byte(I2C_2, BH1730_I2C_ADDR, BH1730_ADDR(BH1730_TIMING_REG), (256 - cycle));
|
||||
|
||||
als_ctxt->gain = gain;
|
||||
als_ctxt->cycle = cycle;
|
||||
}
|
||||
|
||||
void get_als_lux(als_table_t *als_val)
|
||||
void get_als_lux(als_ctxt_t *als_ctxt)
|
||||
{
|
||||
u32 data[2];
|
||||
float pre_gain_lux;
|
||||
float visible_light;
|
||||
float ir_light;
|
||||
float light_ratio;
|
||||
u32 visible_light;
|
||||
u32 ir_light;
|
||||
u64 lux = 0;
|
||||
u32 itime_us = BH1730_ITIME_CYCLE_TO_US * als_ctxt->cycle;
|
||||
|
||||
u8 adc_ready = 0;
|
||||
u8 retries = 100;
|
||||
|
||||
const float als_gain_idx_tbl[4] = { 1.0, 2.0, 64.0, 128.0 };
|
||||
const float als_norm_res = 100.0;
|
||||
const float als_multiplier = 3.6;
|
||||
const float als_tint = 2.7;
|
||||
|
||||
// Wait for ADC to prepare new data.
|
||||
while (!(adc_ready & BH1730_CTL_ADC_VALID) && retries)
|
||||
{
|
||||
retries--;
|
||||
adc_ready = i2c_recv_byte(I2C_2, BH1730_I2C_ADDR, BH1730_ADDR(BH1730_CONTROL_REG));
|
||||
}
|
||||
|
||||
// Get visible and ir light raw data.
|
||||
// Get visible and ir light raw data. Mode is continuous so waiting for new values doesn't matter.
|
||||
data[0] = i2c_recv_byte(I2C_2, BH1730_I2C_ADDR, BH1730_ADDR(BH1730_DATA0LOW_REG)) +
|
||||
(i2c_recv_byte(I2C_2, BH1730_I2C_ADDR, BH1730_ADDR(BH1730_DATA0HIGH_REG)) << 8);
|
||||
data[1] = i2c_recv_byte(I2C_2, BH1730_I2C_ADDR, BH1730_ADDR(BH1730_DATA1LOW_REG)) +
|
||||
(i2c_recv_byte(I2C_2, BH1730_I2C_ADDR, BH1730_ADDR(BH1730_DATA1HIGH_REG)) << 8);
|
||||
|
||||
als_val->over_limit = data[0] > 65534 || data[1] > 65534;
|
||||
als_val->vi_light = data[0];
|
||||
als_val->ir_light = data[1];
|
||||
visible_light = data[0];
|
||||
ir_light = data[1];
|
||||
|
||||
if (!data[0] || !retries)
|
||||
als_ctxt->over_limit = visible_light > 65534 || ir_light > 65534;
|
||||
als_ctxt->vi_light = visible_light;
|
||||
als_ctxt->ir_light = ir_light;
|
||||
|
||||
if (!visible_light)
|
||||
{
|
||||
als_val->lux = 0.0;
|
||||
als_ctxt->lux = 0;
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
visible_light = (float)data[0];
|
||||
ir_light = (float)data[1];
|
||||
light_ratio = (float)data[1] / (float)data[0];
|
||||
// Set calibration parameters.
|
||||
u32 lux_multiplier = BH1730_LUX_MULTIPLIER;
|
||||
u32 opt_win_cal_count = ARRAY_SIZE(opt_win_cal_default);
|
||||
const opt_win_cal_t *opt_win_cal = opt_win_cal_default;
|
||||
|
||||
// The following are specific to the light filter Switch uses.
|
||||
if (light_ratio < 0.5)
|
||||
pre_gain_lux = visible_light * 5.002 - ir_light * 7.502;
|
||||
else if (light_ratio < 0.754)
|
||||
pre_gain_lux = visible_light * 2.250 - ir_light * 2.000;
|
||||
else if (light_ratio < 1.029)
|
||||
pre_gain_lux = visible_light * 1.999 - ir_light * 1.667;
|
||||
else if (light_ratio < 1.373)
|
||||
pre_gain_lux = visible_light * 0.884 - ir_light * 0.583;
|
||||
else if (light_ratio < 1.879)
|
||||
pre_gain_lux = visible_light * 0.309 - ir_light * 0.165;
|
||||
else pre_gain_lux = 0.0;
|
||||
// Apply optical window calibration coefficients.
|
||||
for (u32 i = 0; i < opt_win_cal_count; i++)
|
||||
{
|
||||
if (1000 * ir_light / visible_light < opt_win_cal[i].rc)
|
||||
{
|
||||
lux = ((u64)opt_win_cal[i].cv * data[0]) - (opt_win_cal[i].ci * data[1]);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
als_val->lux = (pre_gain_lux / als_gain_idx_tbl[als_val->gain]) * (als_norm_res / ((float)als_val->itime * als_tint)) * als_multiplier;
|
||||
lux *= BH1730_DEFAULT_ITIME_MS * lux_multiplier;
|
||||
lux /= als_gain_idx_tbl[als_ctxt->gain] * itime_us;
|
||||
lux /= 1000;
|
||||
|
||||
if (lux > BH1730_LUX_MAX)
|
||||
lux = BH1730_LUX_MAX;
|
||||
|
||||
als_ctxt->lux = lux;
|
||||
}
|
||||
|
||||
u8 als_init(als_table_t *als_val)
|
||||
u8 als_power_on(als_ctxt_t *als_ctxt)
|
||||
{
|
||||
// Enable power to ALS IC.
|
||||
max7762x_regulator_set_voltage(REGULATOR_LDO6, 2900000);
|
||||
|
|
@ -109,12 +147,10 @@ u8 als_init(als_table_t *als_val)
|
|||
// Initialize ALS.
|
||||
u8 id = i2c_recv_byte(I2C_2, BH1730_I2C_ADDR, BH1730_ADDR(0x12));
|
||||
i2c_send_byte(I2C_2, BH1730_I2C_ADDR, BH1730_SPEC(BH1730_SPECCMD_RESET), 0);
|
||||
i2c_send_byte(I2C_2, BH1730_I2C_ADDR, BH1730_ADDR(BH1730_GAIN_REG), HOS_GAIN);
|
||||
i2c_send_byte(I2C_2, BH1730_I2C_ADDR, BH1730_ADDR(BH1730_TIMING_REG), (256 - HOS_ITIME));
|
||||
i2c_send_byte(I2C_2, BH1730_I2C_ADDR, BH1730_ADDR(BH1730_CONTROL_REG), BH1730_CTL_POWER_ON | BH1730_CTL_ADC_EN);
|
||||
|
||||
als_val->gain = HOS_GAIN;
|
||||
als_val->itime = HOS_ITIME;
|
||||
set_als_cfg(als_ctxt, BH1730_DEFAULT_GAIN, BH1730_DEFAULT_ICYCLE);
|
||||
|
||||
i2c_send_byte(I2C_2, BH1730_I2C_ADDR, BH1730_ADDR(BH1730_CONTROL_REG), BH1730_CTL_POWER_ON | BH1730_CTL_ADC_EN);
|
||||
|
||||
return id;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -48,18 +48,18 @@
|
|||
#define BH1730_ADDR(reg) (BH1730_CMD_MAGIC | BH1730_CMD_SETADDR | (reg))
|
||||
#define BH1730_SPEC(cmd) (BH1730_CMD_MAGIC | BH1730_CMD_SPECCMD | (cmd))
|
||||
|
||||
typedef struct _als_table_t
|
||||
typedef struct _als_ctxt_t
|
||||
{
|
||||
float lux;
|
||||
u32 lux;
|
||||
bool over_limit;
|
||||
u32 vi_light;
|
||||
u32 ir_light;
|
||||
u8 gain;
|
||||
u8 itime;
|
||||
} als_table_t;
|
||||
u32 vi_light;
|
||||
u32 ir_light;
|
||||
u8 gain;
|
||||
u8 cycle;
|
||||
} als_ctxt_t;
|
||||
|
||||
void set_als_cfg(als_table_t *als_val, u8 gain, u8 itime);
|
||||
void get_als_lux(als_table_t *als_val);
|
||||
u8 als_init(als_table_t *als_val);
|
||||
void set_als_cfg(als_ctxt_t *als_ctxt, u8 gain, u8 cycle);
|
||||
void get_als_lux(als_ctxt_t *als_ctxt);
|
||||
u8 als_power_on(als_ctxt_t *als_ctxt);
|
||||
|
||||
#endif /* __ALS_H_ */
|
||||
|
|
|
|||
Loading…
Reference in a new issue