3 * Copyright 2007 Free Software Foundation, Inc.
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 #include "memory_map.h"
25 #define IB_XFER_1 0x00
26 #define IB_XFER_2 0x20
27 #define IB_XFER_3 0x40
28 #define IB_XFER_4 0x60
29 #define IB_ADDR_MASK 0x1f
32 ad9777_write_reg(int regno, uint8_t value)
34 uint8_t instr = IB_WR | IB_XFER_1 | (regno & IB_ADDR_MASK);
35 spi_transact(SPI_TXONLY, SPI_SS_AD9777,
36 (instr << 8) | (value & 0xff), 16, SPIF_PUSH_FALL);
40 ad9777_read_reg(int regno)
42 uint8_t instr = IB_RD | IB_XFER_1 | (regno & IB_ADDR_MASK);
43 uint32_t r = spi_transact(SPI_TXRX, SPI_SS_AD9777,
45 SPIF_PUSH_FALL | SPIF_LATCH_RISE);