1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/* -*- c++ -*- */
/*
* 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 "lsdac.h"
#include "spi.h"
#include "memory_map.h"
// AD5624, AD5623
#define CMD(x) ((x) << 19)
#define CMD_WR_INPUT_N CMD(0) // write input N
#define CMD_UP_DAC_N CMD(1) // update DAC N from input reg
#define CMD_WR_INPUT_N_LDAC CMD(2) // write input N, update all
#define CMD_WR_UP_DAC_N CMD(3) // write and update N
#define CMD_WR_PWR_CONFIG CMD(4) // write power up/down config reg
#define CMD_SW_RESET CMD(5) // force s/w reset
#define CMD_WR_LDAC_CFG CMD(6) // write LDAC config reg
#define CMD_WR_INT_REF_CFG CMD(7) // write internal ref cfg reg (AD5623R only)
//#define SPI_SS_DEBUG SPI_SS_TX_DB
#define SPI_SS_DEBUG 0
inline static void
_write_rx(uint32_t v)
{
spi_transact(SPI_TXONLY, SPI_SS_RX_DAC | SPI_SS_DEBUG, v, 24, SPIF_PUSH_RISE);
}
inline static void
_write_tx(uint32_t v)
{
spi_transact(SPI_TXONLY, SPI_SS_TX_DAC | SPI_SS_DEBUG, v, 24, SPIF_PUSH_RISE);
}
void
lsdac_init(void)
{
_write_tx(CMD_SW_RESET | 0x1); // power-on reset
_write_rx(CMD_SW_RESET | 0x1); // power-on reset
}
void
lsdac_write_rx(int which_dac, int value)
{
_write_rx(CMD_WR_UP_DAC_N | ((which_dac & 0x7) << 16) | ((value << 4) & 0xffff));
}
void
lsdac_write_tx(int which_dac, int value)
{
_write_tx(CMD_WR_UP_DAC_N | ((which_dac & 0x7) << 16) | ((value << 4) & 0xffff));
}
|
