Public function

Functions
void	loadcell2_cfg_setup (loadcell2_cfg_t *cfg)
	Config Object Initialization function.
LOADCELL2_RETVAL	loadcell2_init (loadcell2_t *ctx, loadcell2_cfg_t *cfg)
	Initialization function.
void	loadcell2_default_cfg (loadcell2_t *ctx)
	Click Default Configuration function.
void	loadcell2_generic_write (loadcell2_t *ctx, uint8_t reg, uint8_t *data_buf, uint8_t len)
	Generic write function.
void	loadcell2_generic_read (loadcell2_t *ctx, uint8_t reg, uint8_t *data_buf, uint8_t len)
	Generic read function.
uint8_t	loadcell2_check_data_ready (loadcell2_t *ctx)
	Check data ready function.
void	loadcell2_reset (loadcell2_t *ctx)
	Reset function.
LOADCELL2_RETVAL	loadcell2_power_on (loadcell2_t *ctx)
	Power On function.
void	loadcell2_set_ldo_voltage (loadcell2_t *ctx)
	Set LDO Voltage function.
void	loadcell2_set_gain (loadcell2_t *ctx, uint8_t gain_val)
	Set gain function.
void	loadcell2_set_sample_rate (loadcell2_t *ctx, uint8_t rate_sps)
	Set sample rate function.
void	loadcell2_turn_off_clk_chp (loadcell2_t *ctx)
	Turn Off clk chp function.
void	loadcell2_enable_dec_cap (loadcell2_t *ctx)
	Enables PGA output function.
void	loadcell2_calibrate_afe (loadcell2_t *ctx)
	Calibrate analog front end of system function.
uint32_t	loadcell2_get_result (loadcell2_t *ctx)
	Get results function.
void	loadcell2_tare (loadcell2_t *ctx, loadcell2_data_t *cell_data)
	Tare function.
uint8_t	loadcell2_calibration (loadcell2_t *ctx, uint16_t cal_val, loadcell2_data_t *cell_data)
	Calibration function.
float	loadcell2_get_weight (loadcell2_t *ctx, loadcell2_data_t *cell_data)
	Get weight function.
uint8_t	loadcell2_check_drdy (loadcell2_t *ctx)
	Check data ready function.

Detailed Description

Function Documentation

loadcell2_calibrate_afe()

void loadcell2_calibrate_afe

(

loadcell2_t *

ctx

)

Calibrate analog front end of system function.

Parameters

loadcell2

Click object.

@description The function enables PGA output bypass capacitor of NAU7802 24-Bit Dual-Channel ADC on Load Cell 2 Click board.

Note

It is recommended that the AFE be re-calibrated any time the gain, SPS, or channel number is changed.

loadcell2_calibration()

uint8_t loadcell2_calibration	(	loadcell2_t *	ctx,
		uint16_t	cal_val,
		loadcell2_data_t *	cell_data )

Calibration function.

Parameters

loadcell2

Click object.

@description This function do calibration.

loadcell2_cfg_setup()

void loadcell2_cfg_setup

(

loadcell2_cfg_t *

cfg

)

Config Object Initialization function.

Parameters

cfg	Click configuration structure.

@description This function initializes click configuration structure to init state.

Note

All used pins will be set to unconnected state.

loadcell2_check_data_ready()

uint8_t loadcell2_check_data_ready

(

loadcell2_t *

ctx

)

Check data ready function.

Parameters

loadcell2

Click object.

Returns

Data ready:

• 0 : Not ready;
• 1 : New data ready;

@description The function check measurement data ready of NAU7802 24-Bit Dual-Channel ADC on Load Cell 2 Click board.

loadcell2_check_drdy()

uint8_t loadcell2_check_drdy

(

loadcell2_t *

ctx

)

Check data ready function.

Parameters

loadcell2

Click object.

Returns

• 0 : Data Not Ready;
• 1 : Data Ready;

@description The function check data ready state by return state of the INT pin of Load Cell 2 Click board.

loadcell2_default_cfg()

void loadcell2_default_cfg

(

loadcell2_t *

ctx

)

Click Default Configuration function.

Parameters

ctx	Click object.

@description This function executes default configuration for LoadCell2 click.

Note

• set LDO Voltage of 3.3V and internal LDO
• set gain x128
• set conversion rate of 80 SPS
• turn Off clock frequency
• enables PGA output bypass capacitor

loadcell2_enable_dec_cap()

void loadcell2_enable_dec_cap

(

loadcell2_t *

ctx

)

Enables PGA output function.

Parameters

loadcell2

Click object.

@description The function enables PGA output bypass capacitor of NAU7802 24-Bit Dual-Channel ADC on Load Cell 2 Click board.

loadcell2_generic_read()

void loadcell2_generic_read	(	loadcell2_t *	ctx,
		uint8_t	reg,
		uint8_t *	data_buf,
		uint8_t	len )

Generic read function.

Parameters

ctx	Click object.
reg	Register address.
data_buf	Output data buf
len	Number of the bytes to be read

@description This function reads data from the desired register.

loadcell2_generic_write()

void loadcell2_generic_write	(	loadcell2_t *	ctx,
		uint8_t	reg,
		uint8_t *	data_buf,
		uint8_t	len )

Generic write function.

Parameters

ctx	Click object.
reg	Register address.
data_buf	Data buf to be written.
len	Number of the bytes in data buf.

@description This function writes data to the desired register.

loadcell2_get_result()

uint32_t loadcell2_get_result

(

loadcell2_t *

ctx

)

Get results function.

Parameters

loadcell2

Click object.

@description The function read ADC conversion result of NAU7802 24-Bit Dual-Channel ADC on Load Cell 2 Click board.

loadcell2_get_weight()

float loadcell2_get_weight	(	loadcell2_t *	ctx,
		loadcell2_data_t *	cell_data )

Get weight function.

Parameters

loadcell2

Click object.

@description This function messure weight.

loadcell2_init()

LOADCELL2_RETVAL loadcell2_init	(	loadcell2_t *	ctx,
		loadcell2_cfg_t *	cfg )

Initialization function.

Parameters

ctx	Click object.
cfg	Click configuration structure.

@description This function initializes all necessary pins and peripherals used for this click.

loadcell2_power_on()

LOADCELL2_RETVAL loadcell2_power_on

(

loadcell2_t *

ctx

)

Power On function.

Parameters

loadcell2

Click object.

Returns

• 0 : Error;
• 1 : Success;

@description The function set power up analog and digital circuit of NAU7802 24-Bit Dual-Channel ADC on Load Cell 2 Click board.

loadcell2_reset()

void loadcell2_reset

(

loadcell2_t *

ctx

)

Reset function.

Parameters

loadcell2

Click object.

@description The function resets all registers of NAU7802 24-Bit Dual-Channel ADC on Load Cell 2 Click board.

loadcell2_set_gain()

void loadcell2_set_gain	(	loadcell2_t *	ctx,
		uint8_t	gain_val )

Set gain function.

Parameters

loadcell2	Click object.
gain_val	Gain select : 128 : LOADCELL2_GAIN_VAL_x128; 64 : LOADCELL2_GAIN_VAL_x64; 32 : LOADCELL2_GAIN_VAL_x32; 16 : LOADCELL2_GAIN_VAL_x16; 8 : LOADCELL2_GAIN_VAL_x8; 4 : LOADCELL2_GAIN_VAL_x4; 2 : LOADCELL2_GAIN_VAL_x2; 1 : LOADCELL2_GAIN_VAL_x1;

@description The function set gain of NAU7802 24-Bit Dual-Channel ADC on Load Cell 2 Click board.

loadcell2_set_ldo_voltage()

void loadcell2_set_ldo_voltage

(

loadcell2_t *

ctx

)

Set LDO Voltage function.

Parameters

loadcell2

Click object.

@description The function set LDO Voltage of 3.3V and internal LDO of NAU7802 24-Bit Dual-Channel ADC on Load Cell 2 Click board.

loadcell2_set_sample_rate()

void loadcell2_set_sample_rate	(	loadcell2_t *	ctx,
		uint8_t	rate_sps )

Set sample rate function.

Parameters

loadcell2	Click object.
rate_sps	Conversion rate select : 320 : LOADCELL2_CONV_RATE_SPS_320; 80 : LOADCELL2_CONV_RATE_SPS_80; 40 : LOADCELL2_CONV_RATE_SPS_40; 20 : LOADCELL2_CONV_RATE_SPS_20; 10 : LOADCELL2_CONV_RATE_SPS_10;

@description The function set sample rate of NAU7802 24-Bit Dual-Channel ADC on Load Cell 2 Click board.

loadcell2_tare()

void loadcell2_tare	(	loadcell2_t *	ctx,
		loadcell2_data_t *	cell_data )

Tare function.

Parameters

loadcell2

Click object.

@description This function tare load cell.

loadcell2_turn_off_clk_chp()

void loadcell2_turn_off_clk_chp

(

loadcell2_t *

ctx

)

Turn Off clk chp function.

Parameters

loadcell2

Click object.

@description The function turn Off selected the CLK_CHP clock frequency of NAU7802 24-Bit Dual-Channel ADC on Load Cell 2 Click board.