spi.cpp

/*
 * spi.c
 *
 *  Created on: 19/feb/2015
 *      Author: Luca
 */

#include "spi.h"

//extern int handle;

static uint32_t addrs[MAX_SUPPORTED_PAGE_SIZE];
static SPI_API errors[MAX_SUPPORTED_PAGE_SIZE];
static uint32_t datas[MAX_SUPPORTED_PAGE_SIZE];

SPI_API spi_select(int handle) {

	CAENComm_ErrorCode ret;

	ret = CAENComm_Write32(handle, SPI_SELECT_REG_ADDR, 0x2);

	return ret;
}

SPI_API spi_unselect(int handle) {
	CAENComm_ErrorCode ret;
	ret = CAENComm_Write32(handle, SPI_SELECT_REG_ADDR, 0x3);
	return ret;
}

SPI_API spi_read(int handle, uint8_t *data) {

	uint32_t reg;
	CAENComm_ErrorCode ret;

	ret = CAENComm_Read32(handle, SPI_DATA_REG_ADDR, &reg);

	*data = (reg & 0xFF);
	return ret;

}

SPI_API spi_write(int handle, uint8_t data) {

	uint32_t reg;
	CAENComm_ErrorCode ret;

	reg = data & 0xFF;
	ret = CAENComm_Write32(handle, SPI_DATA_REG_ADDR, reg);

	return ret;
}

SPI_API spi_write_block(int handle, uint8_t *buf, uint32_t len) {

	int i;
	CAENComm_ErrorCode ret;

	for (i = 0; i < len; ++i) {
		addrs[i] = SPI_DATA_REG_ADDR;
		datas[i] = (uint32_t) buf[i];
	}

#ifdef __MULTIWRITE_SUPPORT__
	ret = CAENComm_MultiWrite32(handle, addrs, len, datas, errors);
#else
    for (i = 0; i < len; i++)
	   ret=spi_write(buf[i]);
#endif

	return ret;

}

SPI_API spi_read_block(int handle, uint8_t *buf, uint32_t len) {

	SPI_API ret;
	int i;

	for (i = 0; i < len; ++i) {
		addrs[i] = SPI_DATA_REG_ADDR;
	}

#ifdef __MULTIREAD_SUPPORT__
	ret = CAENComm_MultiRead32(handle, addrs, len, datas, errors);
	for (i = 0; i < len; ++i) {
		buf[i] = (uint8_t) datas[i];
	}
#else
    for (i = 0; i < len; i++)
	   ret=spi_read(&buf[i]);
#endif

	return ret;

}