Light sensing with a LED

Light sensing based on sensing the charge accumulated due to the incident light on a reverse biased LED. More...

Functions
void	led_sense_init (uint32_t led_out_pin, uint32_t led_sense_analog_pin, uint32_t led_off_val)
	Initialize the LED light sensing module. More...
uint32_t	led_sense_get (void)
	Get the light value by measuring the voltage a LED's anode. More...
void	led_sense_cfg_input (bool is_input_on)
	Configure the LED as either an light sensing input device or as an light emitting actuation device. More...

Detailed Description

Function Documentation

led_sense_cfg_input()

void led_sense_cfg_input

(

bool

is_input_on

)

Parameters

is_input_on

Is input if true and output if false

Definition at line 38 of file led_sense.c.

led_sense_get()

uint32_t led_sense_get

(

void

)

Returns

The ADC output of the light sensing by the LED. The value x 3.6/4096 is the actual voltage.

Definition at line 55 of file led_sense.c.

References SIMPLE_ADC_GAIN1_6, and simple_adc_get_value().

led_sense_init()

void led_sense_init	(	uint32_t	led_out_pin,
		uint32_t	led_sense_analog_pin,
		uint32_t	led_off_val
	)

Parameters

led_out_pin	The pin driving the LED
led_sense_analog_pin	The pin at LED's anode to sense light
led_off_val	The digital value at led_out_pin to switch off the LED.

Definition at line 27 of file led_sense.c.

References ASSERT.