Directed Electronics 3200HS Informazioni Techniche Scaricare il pdf (Pagina 57)

SCI to SPI Peripheral Communication in V850ES Microcontrollers

** display temp in degrees in LEDs, turn on decimal point for negative

temperature

**---------------------------------------------------------------------------

volatile int dig[5]; /* digits xxx.yy */

void Temp_Display(short temp)

{

BOOL negative = MD_FALSE;

temp = temp / 8; /* remove 3 LSB, temp is now temperature * 16 */

if (temp < 0) {

negative = MD_TRUE;

temp = -temp;

}

/* temp is now a positive number, temperature * 16 */

dig[0] = temp / 1600; /* get hundreds digit */

temp = temp - (dig[0] * 1600); /* remove hundreds digit */

dig[1] = temp / 160; /* get tens digit */

temp = temp - (dig[1] * 160); /* get remainder */

dig[2] = temp / 16; /* get ones digit */

temp = temp - (dig[2] * 16); /* remainder is now number of 16ths */

temp = temp * 100; /* scale up to get .xxyy, now

xx.yy */

dig[3] = temp / 160; /* get tenths digit */

temp = temp - (dig[3] * 160);

dig[4] = temp / 16; /* get hundredths digit */

/* now display by rolling through display */

if (negative) {

/* negative, display sign in left */

led_out_left(LED_PAT_DASH); /* display minus sign */

if (dig[0] != 0) {

led_dig_right(dig[0]);

Temp_Delay_500ms();

led_dig_left(dig[0]);

}

if ( (dig[0] != 0) || (dig[1] != 0) ) {

led_dig_right(dig[1]);

Temp_Delay_500ms();

led_dig_left(dig[1]);

}

} else {

/* positive number, start in left digit */

if (dig[0] != 0) {

led_dig_left(dig[0]);

led_dig_right(dig[1]);

Temp_Delay_500ms();

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Directed Electronics 3200HS Informazioni Techniche Pagina 57

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