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#include "tsl2591.h"
#include "watch_i2c.h"
bool tsl2591_init() {
uint8_t device_id = watch_i2c_read8(TSL2591_ADDRESS, TSL2591_REGISTER_DEVICE_ID | TSL2591_COMMAND_BIT);
if (device_id != 0x50) return false;
tsl2591_set_gain(TSL2591_CONTROL_GAIN_LOW);
tsl2591_set_integration_time(TSL2591_CONTROL_INTEGRATIONTIME_100MS);
watch_i2c_write8(TSL2591_ADDRESS, TSL2591_REGISTER_ENABLE | TSL2591_COMMAND_BIT, TSL2591_ENABLE_POWERON | TSL2591_ENABLE_AEN);
return true;
}
void tsl2591_set_gain(TSL2591Control gain) {
uint8_t control = watch_i2c_read8(TSL2591_ADDRESS, TSL2591_REGISTER_CONTROL | TSL2591_COMMAND_BIT);
control &= 0b11001111;
control |= gain;
watch_i2c_write8(TSL2591_ADDRESS, TSL2591_REGISTER_CONTROL | TSL2591_COMMAND_BIT, control);
}
void tsl2591_set_integration_time(TSL2591Control integration_time) {
uint8_t control = watch_i2c_read8(TSL2591_ADDRESS, TSL2591_REGISTER_CONTROL | TSL2591_COMMAND_BIT);
control &= 0b11111000;
control |= integration_time;
watch_i2c_write8(TSL2591_ADDRESS, TSL2591_REGISTER_CONTROL | TSL2591_COMMAND_BIT, control);
}
uint16_t tsl2591_get_visible_light_reading() {
uint16_t full = make_le_16(watch_i2c_read16(TSL2591_ADDRESS, TSL2591_REGISTER_CHAN0_LOW | TSL2591_COMMAND_BIT));
uint16_t infrared = make_le_16(watch_i2c_read16(TSL2591_ADDRESS, TSL2591_REGISTER_CHAN1_LOW | TSL2591_COMMAND_BIT));
printf("Full Spectrum : %d\n", full);
printf("Infrared : %d\n", infrared);
int32_t result = full - infrared;
return (result > 0) ? (uint16_t)result : 0;
}
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