Technical information

CSI to SPI Peripheral Communication in V850ES Microcontrollers

CSI00_SendDone = MD_FALSE; /* set flag false - will be wset true by

INTCSI00 */

CSI00_SendData(txbuf, 2); /* transmit address and data for

configuration */

while (CSI00_SendDone == MD_FALSE)

; /* wait for CSI transfer done */

TEMP2_CS_OFF; /* deselect chip to allow conversion to start again

#endif

return MD_OK;

}

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

** Abstract:

** Function to do Temperature Sensor 1 Read

** Parameters: None

** Returns:

** short (16-bit signed) temperature value * 128

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

short Temp_Read_1(void)

{

#if (TEMP_DEBUG == 1)

unsigned short usi;

unsigned long ul;

short si;

usi = ADCR; /* read the A/D converter: 0000 - FFC0 */

ul = usi;

ul = (ul * (205 * 128)); /* scale full range to (0 - 205) * 16 * 8

ul = ul >> 16; /* scale to value plus 4 bits of

16th degrees plus 3 LSB */

ul = ul & 0xFFFFFFF8; /* mask 3 LSB to zero */

si = (short)ul; /* now as signed short number 0 -

205 */

si = si - (55 * 128); /* now signed short number -55 - 150 */

return (si);

#else

short retval = 0;

CSI00_SetType4(); /* set CSI00 interface for Type 4

transfer */

TEMP1_CS_ON; /* select chip to enable reading */

/* delay 100ns between CS true and SCK rise */

/* one NOP takes 50ns at 20MHz, so do two */

__asm("nop");