HID Hi-O iCLASS Installation Guide - Manual (Page 29)

iCLASS OEM75 Integration Guide, 3141-907, Rev. B.0
January 2014 Page 29 of 49
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/**********************************************************************/
/************************** Public functions *************************/
/**********************************************************************/
/***********************************************************************
** NAME:
** InitSpi
**
** INPUTS:
** None
**
** OUTPUTS:
** None
**
** RETURN:
** None
**
** DESCRIPTION:
** This function sets up the MSSP to be a master SPI device.
**
** NOTES: This is code for a Microchip PIC18F2520. This initialization code will
** be different for other SPI drivers on other processors.
**
**********************************************************************/
void InitSpi(void)
{
// Enable SPI as a master device, Mode 3
SSPSTAT = SSPSTAT_MASTER;
SSPCON1 = SSPCON1_MASTER;
}
/***********************************************************************
** NAME:
** WriteSpi
**
** INPUTS:
** pData - points to the data to send to the slave SPI
** numBytes – number of bytes in the message
**
** OUTPUTS:
** None
**
** RETURN:
** None
**
** DESCRIPTION:
** This function transmits a message to a slave SPI device.
**
** NOTES:
**
***********************************************************************/
void WriteSpi(UBYTE *pData, UBYTE numBytes)
{
UBYTE returnByte, cnt;
// Select the SPI slave device.
OEM75_SS = 0;