| 1 | /* -*- c++ -*- */
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| 2 | /*
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| 3 | * Copyright 2004 Free Software Foundation, Inc.
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| 4 | *
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| 5 | * This file is part of GNU Radio
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| 6 | *
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| 7 | * GNU Radio is free software; you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation; either version 3, or (at your option)
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| 10 | * any later version.
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| 11 | *
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| 12 | * GNU Radio is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with GNU Radio; see the file COPYING. If not, write to
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| 19 | * the Free Software Foundation, Inc., 51 Franklin Street,
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| 20 | * Boston, MA 02110-1301, USA.
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| 21 | */
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| 22 |
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| 23 | #ifndef INCLUDED_SPI_H
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| 24 | #define INCLUDED_SPI_H
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| 25 |
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| 26 | // FX2 is SPI bus master going to fpga
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| 27 | #define SPI IOA
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| 28 | #define SPI_OE OEA
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| 29 | #define bmSPI_OE 0x8B // bits on PA
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| 30 | #define VEN_SPI_EN 0x96 // vendor commands
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| 31 | #define VEN_SPI_DIS 0x97
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| 32 | #define VEN_SPI_RD 0x98
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| 33 | #define VEN_SPI_WR 0x99
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| 34 |
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| 35 | #define bmSCLK bmBIT0 // sclk on port A
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| 36 | #define bmSDO bmBIT1 // SPI MOSI
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| 37 | #define bmSDI bmBIT3 // SPI MISO
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| 38 | #define bmSS bmBIT7 // Slave select
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| 39 | #define SPI_FMT_HDR_MASK (3 << 5)
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| 40 | #define SPI_FMT_HDR_0 (0 << 5) // 0 header bytes
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| 41 | #define SPI_FMT_HDR_1 (1 << 5) // 1 header byte
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| 42 | #define SPI_FMT_HDR_2 (2 << 5) // 2 header bytes
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| 43 |
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| 44 | sbit at 0x80+0 bitS_CLK; // 0x80 is the bit address of IOA
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| 45 | sbit at 0x80+1 bitS_OUT; // out from FX2 point of view
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| 46 | sbit at 0x80+3 bitS_IN; // in from FX2 point of view
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| 47 |
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| 48 | void init_spi (void); // one time call to init
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| 49 |
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| 50 | // returns non-zero if successful, else 0
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| 51 | unsigned char
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| 52 | spi_read (unsigned char header_hi, unsigned char header_lo,
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| 53 | unsigned char enables, unsigned char format,
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| 54 | xdata unsigned char *buf, unsigned char len);
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| 55 |
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| 56 | // returns non-zero if successful, else 0
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| 57 | unsigned char
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| 58 | spi_write (unsigned char header_hi, unsigned char header_lo,
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| 59 | unsigned char enables, unsigned char format,
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| 60 | const xdata unsigned char *buf, unsigned char len);
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| 61 |
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| 62 | void
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| 63 | spi_write_byte_msb (unsigned char v);
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| 64 |
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| 65 | void
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| 66 | spi_write_bytes_msb (const xdata unsigned char *buf, unsigned char len);
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| 67 |
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| 68 | unsigned char
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| 69 | spi_read_byte_msb (void) _naked;
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| 70 |
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| 71 | void
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| 72 | spi_read_bytes_msb (xdata unsigned char *buf, unsigned char len);
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| 73 |
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| 74 | #endif /* INCLUDED_SPI_H */
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