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Merge pull request #15 from jboone/master

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MAX5864 driver
This commit is contained in:
Michael Ossmann
2012-07-19 15:06:23 -07:00
parent d3e7346f33 9f334fc5f0
commit 37ec0b09f8
2 changed files with 132 additions and 0 deletions
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100
firmware/common/max5864.c Normal file
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/*
* Copyright (C) 2012 Jared Boone <jared@sharebrained.com>
*
* This file is part of HackRF.
*
* 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 2, 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; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include <stdint.h>
#include <libopencm3/lpc43xx/gpio.h>
#include <libopencm3/lpc43xx/ssp.h>
#include "hackrf_core.h"
#include "max5864.h"
void max5864_spi_write(uint_fast8_t value) {
gpio_clear(PORT_AD_CS, PIN_AD_CS);
ssp_write(SSP1_NUM, value);
gpio_set(PORT_AD_CS, PIN_AD_CS);
}
/* Set MAX5864 operation mode to "Shutdown":
* REF: off
* CLK: off
* ADCs: off (bus is tri-stated)
* DACs: off (set input bus to zero or OVdd)
*/
void max5864_shutdown()
{
max5864_spi_write(0x00);
}
/* Set MAX5864 operation mode to "Standby":
* REF: on
* CLK: off?
* ADCs: off (bus is tri-stated)
* DACs: off (set input bus to zero or OVdd)
*/
void max5864_standby()
{
max5864_spi_write(0x05);
}
/* Set MAX5864 operation mode to "Idle":
* REF: on
* CLK: on
* ADCs: off (bus is tri-stated)
* DACs: off (set input bus to zero or OVdd)
*/
void max5864_idle()
{
max5864_spi_write(0x01);
}
/* Set MAX5864 operation mode to "Rx":
* REF: on
* CLK: on
* ADCs: on
* DACs: off (set input bus to zero or OVdd)
*/
void max5864_rx()
{
max5864_spi_write(0x02);
}
/* Set MAX5864 operation mode to "Tx":
* REF: on
* CLK: on
* ADCs: off (bus is tri-stated)
* DACs: on
*/
void max5864_tx()
{
max5864_spi_write(0x03);
}
/* Set MAX5864 operation mode to "Xcvr":
* REF: on
* CLK: on
* ADCs: on
* DACs: on
*/
void max5864_xcvr()
{
max5864_spi_write(0x04);
}

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firmware/common/max5864.h Normal file
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/*
* Copyright (C) 2012 Jared Boone <jared@sharebrained.com>
*
* This file is part of HackRF.
*
* 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 2, 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; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef __MAX5864_H
#define __MAX5864_H
void max5864_shutdown();
void max5864_standby();
void max5864_idle();
void max5864_rx();
void max5864_tx();
void max5864_xcvr();
#endif // __MAX5864_H