LTC2485CDD datasheet(36/40 Pages) LINER

36 / 40 page

LTC2485

2485fa

*******************************************************************************/

signed int32 read_LTC2485(char addr, char config)

{

struct fourbytes

// Define structure of four consecutive bytes

{

// To allow byte access to a 32 bit int or float.

int8 te0;

int8 te1;

// The make32() function in this compiler will

int8 te2;

// also work, but a union of 4 bytes and a 32 bit int

int8 te3;

// is probably more portable.

};

union

// adc_code.bits32

all 32 bits

{

// adc_code.by.te0

byte 0

signed int32 bits32;

// adc_code.by.te1

byte 1

struct fourbytes by;

// adc_code.by.te2

byte 2

} adc_code;

// adc_code.by.te3

byte 3

// Start communication with LTC2485:

i2c_start();

if(i2c_write(addr | WRITE))// If no acknowledge, return zero

{

i2c_stop();

return 0;

}

i2c_write(config);

i2c_start();

i2c_write(addr | READ);

adc_code.by.te3 = i2c_read();

adc_code.by.te2 = i2c_read();

adc_code.by.te1 = i2c_read();

adc_code.by.te0 = i2c_read();

i2c_stop();

return adc_code.bits32;

} // End of read_LTC2485()

/*** initialize() **************************************************************

Basic hardware initialization of controller and LCD, send Hello message to LCD

*******************************************************************************/

void initialize(void)

{

// General initialization stuff.

setup_adc_ports(NO_ANALOGS);

setup_adc(ADC_OFF);

setup_counters(RTCC_INTERNAL,RTCC_DIV_1);

setup_timer_1(T1_DISABLED);

setup_timer_2(T2_DISABLED,0,1);

lcd_init();

// Initialize LCD

delay_ms(6);

printf(lcd_putc, “Hello!”);

// Obligatory hello message

delay_ms(500);

// for half a second

} // End of initialize()

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