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/*
* Copyright 2012 Ettus Research LLC
* Copyright 2008 Free Software Foundation, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ad9510.h"
#include "spi.h"
#include <memory_map.h>
#define RD (1 << 15)
#define WR (0 << 15)
void
ad9510_write_reg(int regno, uint8_t value)
{
uint32_t inst = WR | (regno & 0xff);
uint32_t v = (inst << 8) | (value & 0xff);
spi_transact(SPI_TXONLY, SPI_SS_AD9510, v, 24, SPI_PUSH_FALL);
}
int
ad9510_read_reg(int regno)
{
uint32_t inst = RD | (regno & 0xff);
uint32_t v = (inst << 8) | 0;
uint32_t r = spi_transact(SPI_TXRX, SPI_SS_AD9510, v, 24,
SPI_PUSH_FALL | SPI_LATCH_FALL);
return r & 0xff;
}
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