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Diffstat (limited to 'firmware/fx2/src/usrp1/spi.c')
-rw-r--r--firmware/fx2/src/usrp1/spi.c472
1 files changed, 0 insertions, 472 deletions
diff --git a/firmware/fx2/src/usrp1/spi.c b/firmware/fx2/src/usrp1/spi.c
deleted file mode 100644
index 0aaffea5d..000000000
--- a/firmware/fx2/src/usrp1/spi.c
+++ /dev/null
@@ -1,472 +0,0 @@
-/* -*- c++ -*- */
-/*
- * Copyright 2004,2006 Free Software Foundation, Inc.
- *
- * This file is part of GNU Radio
- *
- * GNU Radio 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, or (at your option)
- * any later version.
- *
- * GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street,
- * Boston, MA 02110-1301, USA.
- */
-
-#include "spi.h"
-#include "usrp_rev2_regs.h"
-
-static void
-setup_enables (unsigned char enables)
-{
- // Software eanbles are active high.
- // Hardware enables are active low.
-
- // Uhh, the CODECs are active low, but the FPGA is active high...
- enables ^= SPI_ENABLE_FPGA;
-
- // KLUDGE: This code is fragile, but reasonably fast...
- // low three bits of enables go into port A
- USRP_PA = USRP_PA | (0x7 << 3); // disable FPGA, CODEC_A, CODEC_B
- USRP_PA ^= (enables & 0x7) << 3; // enable specified devs
-
- // high four bits of enables go into port E
- USRP_PE = USRP_PE | (0xf << 4); // disable TX_A, RX_A, TX_B, RX_B
- USRP_PE ^= (enables & 0xf0); // enable specified devs
-}
-
-#define disable_all() setup_enables (0)
-
-void
-init_spi (void)
-{
- disable_all (); /* disable all devs */
- bitS_OUT = 0; /* idle state has CLK = 0 */
-}
-
-#if 0
-static unsigned char
-count_bits8 (unsigned char v)
-{
- static unsigned char count4[16] = {
- 0, // 0
- 1, // 1
- 1, // 2
- 2, // 3
- 1, // 4
- 2, // 5
- 2, // 6
- 3, // 7
- 1, // 8
- 2, // 9
- 2, // a
- 3, // b
- 2, // c
- 3, // d
- 3, // e
- 4 // f
- };
- return count4[v & 0xf] + count4[(v >> 4) & 0xf];
-}
-
-#else
-
-static unsigned char
-count_bits8 (unsigned char v)
-{
- unsigned char count = 0;
- if (v & (1 << 0)) count++;
- if (v & (1 << 1)) count++;
- if (v & (1 << 2)) count++;
- if (v & (1 << 3)) count++;
- if (v & (1 << 4)) count++;
- if (v & (1 << 5)) count++;
- if (v & (1 << 6)) count++;
- if (v & (1 << 7)) count++;
- return count;
-}
-#endif
-
-static void
-write_byte_msb (unsigned char v);
-
-unsigned char
-transact_byte_msb (unsigned char v);
-
-static void
-write_bytes_msb (const xdata unsigned char *buf, unsigned char len);
-
-static void
-read_bytes_msb (xdata unsigned char *buf, unsigned char len);
-
-static void
-transact_bytes_msb (xdata unsigned char *buf, unsigned char len);
-
-// returns non-zero if successful, else 0
-unsigned char
-spi_read (unsigned char header_hi, unsigned char header_lo,
- unsigned char enables, unsigned char format,
- xdata unsigned char *buf, unsigned char len)
-{
- if (count_bits8 (enables) > 1)
- return 0; // error, too many enables set
-
- setup_enables (enables);
-
- if (format & SPI_FMT_LSB){ // order: LSB
-#if 1
- return 0; // error, not implemented
-#else
- switch (format & SPI_FMR_HDR_MASK){
- case SPI_FMT_HDR_0:
- break;
- case SPI_FMT_HDR_1:
- write_byte_lsb (header_lo);
- break;
- case SPI_FMT_HDR_2:
- write_byte_lsb (header_lo);
- write_byte_lsb (header_hi);
- break;
- default:
- return 0; // error
- }
- if (len != 0)
- read_bytes_lsb (buf, len);
-#endif
- }
-
- else { // order: MSB
-
- switch (format & SPI_FMT_HDR_MASK){
- case SPI_FMT_HDR_0:
- break;
- case SPI_FMT_HDR_1:
- write_byte_msb (header_lo);
- break;
- case SPI_FMT_HDR_2:
- write_byte_msb (header_hi);
- write_byte_msb (header_lo);
- break;
- default:
- return 0; // error
- }
- if (len != 0)
- read_bytes_msb (buf, len);
- }
-
- disable_all ();
- return 1; // success
-}
-
-
-// returns non-zero if successful, else 0
-unsigned char
-spi_write (unsigned char header_hi, unsigned char header_lo,
- unsigned char enables, unsigned char format,
- const xdata unsigned char *buf, unsigned char len)
-{
- setup_enables (enables);
-
- if (format & SPI_FMT_LSB){ // order: LSB
-#if 1
- return 0; // error, not implemented
-#else
- switch (format & SPI_FMR_HDR_MASK){
- case SPI_FMT_HDR_0:
- break;
- case SPI_FMT_HDR_1:
- write_byte_lsb (header_lo);
- break;
- case SPI_FMT_HDR_2:
- write_byte_lsb (header_lo);
- write_byte_lsb (header_hi);
- break;
- default:
- return 0; // error
- }
- if (len != 0)
- write_bytes_lsb (buf, len);
-#endif
- }
-
- else { // order: MSB
-
- switch (format & SPI_FMT_HDR_MASK){
- case SPI_FMT_HDR_0:
- break;
- case SPI_FMT_HDR_1:
- write_byte_msb (header_lo);
- break;
- case SPI_FMT_HDR_2:
- write_byte_msb (header_hi);
- write_byte_msb (header_lo);
- break;
- default:
- return 0; // error
- }
- if (len != 0)
- write_bytes_msb (buf, len);
- }
-
- disable_all ();
- return 1; // success
-}
-
-unsigned char
-spi_transact (unsigned char data0, unsigned char data1,
- unsigned char data2, unsigned char data3,
- unsigned char enables, xdata unsigned char *buf,
- unsigned char len)
-{
- if (count_bits8 (enables) > 1)
- return 0; // error, too many enables set
-
- if (len > 4)
- return 0;
-
- setup_enables (enables);
-
- buf[0] = data0;
- buf[1] = data1;
- buf[2] = data2;
- buf[3] = data3;
-
- if (len != 0)
- transact_bytes_msb(buf, len);
-
- disable_all ();
- return 1; // success
-}
-
-static unsigned char
-transact_byte_msb (unsigned char v)
-{
- v = (v << 1) | (v >> 7); // rotate left (MSB into bottom bit)
- bitS_OUT = v & 0x1;
- bitS_CLK = 1;
- v |= bitS_IN; // read into bottom bit
- bitS_CLK = 0;
-
- v = (v << 1) | (v >> 7);
- bitS_OUT = v & 0x1;
- bitS_CLK = 1;
- v |= bitS_IN;
- bitS_CLK = 0;
-
- v = (v << 1) | (v >> 7);
- bitS_OUT = v & 0x1;
- bitS_CLK = 1;
- v |= bitS_IN;
- bitS_CLK = 0;
-
- v = (v << 1) | (v >> 7);
- bitS_OUT = v & 0x1;
- bitS_CLK = 1;
- v |= bitS_IN;
- bitS_CLK = 0;
-
- v = (v << 1) | (v >> 7);
- bitS_OUT = v & 0x1;
- bitS_CLK = 1;
- v |= bitS_IN;
- bitS_CLK = 0;
-
- v = (v << 1) | (v >> 7);
- bitS_OUT = v & 0x1;
- bitS_CLK = 1;
- v |= bitS_IN;
- bitS_CLK = 0;
-
- v = (v << 1) | (v >> 7);
- bitS_OUT = v & 0x1;
- bitS_CLK = 1;
- v |= bitS_IN;
- bitS_CLK = 0;
-
- v = (v << 1) | (v >> 7);
- bitS_OUT = v & 0x1;
- bitS_CLK = 1;
- v |= bitS_IN;
- bitS_CLK = 0;
-
- return v;
-}
-
-static void
-transact_bytes_msb (xdata unsigned char *buf, unsigned char len)
-{
- while (len-- != 0){
- *buf++ = transact_byte_msb (*buf);
- }
-}
-
-static void
-write_byte_msb (unsigned char v)
-{
- v = (v << 1) | (v >> 7); // rotate left (MSB into bottom bit)
- bitS_OUT = v & 0x1;
- bitS_CLK = 1;
- bitS_CLK = 0;
-
- v = (v << 1) | (v >> 7); // rotate left (MSB into bottom bit)
- bitS_OUT = v & 0x1;
- bitS_CLK = 1;
- bitS_CLK = 0;
-
- v = (v << 1) | (v >> 7); // rotate left (MSB into bottom bit)
- bitS_OUT = v & 0x1;
- bitS_CLK = 1;
- bitS_CLK = 0;
-
- v = (v << 1) | (v >> 7); // rotate left (MSB into bottom bit)
- bitS_OUT = v & 0x1;
- bitS_CLK = 1;
- bitS_CLK = 0;
-
- v = (v << 1) | (v >> 7); // rotate left (MSB into bottom bit)
- bitS_OUT = v & 0x1;
- bitS_CLK = 1;
- bitS_CLK = 0;
-
- v = (v << 1) | (v >> 7); // rotate left (MSB into bottom bit)
- bitS_OUT = v & 0x1;
- bitS_CLK = 1;
- bitS_CLK = 0;
-
- v = (v << 1) | (v >> 7); // rotate left (MSB into bottom bit)
- bitS_OUT = v & 0x1;
- bitS_CLK = 1;
- bitS_CLK = 0;
-
- v = (v << 1) | (v >> 7); // rotate left (MSB into bottom bit)
- bitS_OUT = v & 0x1;
- bitS_CLK = 1;
- bitS_CLK = 0;
-}
-
-static void
-write_bytes_msb (const xdata unsigned char *buf, unsigned char len)
-{
- while (len-- != 0){
- write_byte_msb (*buf++);
- }
-}
-
-#if 0
-/*
- * This is incorrectly compiled by SDCC 2.4.0
- */
-static unsigned char
-read_byte_msb (void)
-{
- unsigned char v = 0;
-
- bitS_CLK = 1;
- v |= bitS_IN;
- bitS_CLK = 0;
-
- v = v << 1;
- bitS_CLK = 1;
- v |= bitS_IN;
- bitS_CLK = 0;
-
- v = v << 1;
- bitS_CLK = 1;
- v |= bitS_IN;
- bitS_CLK = 0;
-
- v = v << 1;
- bitS_CLK = 1;
- v |= bitS_IN;
- bitS_CLK = 0;
-
- v = v << 1;
- bitS_CLK = 1;
- v |= bitS_IN;
- bitS_CLK = 0;
-
- v = v << 1;
- bitS_CLK = 1;
- v |= bitS_IN;
- bitS_CLK = 0;
-
- v = v << 1;
- bitS_CLK = 1;
- v |= bitS_IN;
- bitS_CLK = 0;
-
- v = v << 1;
- bitS_CLK = 1;
- v |= bitS_IN;
- bitS_CLK = 0;
-
- return v;
-}
-#else
-static unsigned char
-read_byte_msb (void) _naked
-{
- _asm
- clr a
-
- setb _bitS_CLK
- mov c, _bitS_IN
- rlc a
- clr _bitS_CLK
-
- setb _bitS_CLK
- mov c, _bitS_IN
- rlc a
- clr _bitS_CLK
-
- setb _bitS_CLK
- mov c, _bitS_IN
- rlc a
- clr _bitS_CLK
-
- setb _bitS_CLK
- mov c, _bitS_IN
- rlc a
- clr _bitS_CLK
-
- setb _bitS_CLK
- mov c, _bitS_IN
- rlc a
- clr _bitS_CLK
-
- setb _bitS_CLK
- mov c, _bitS_IN
- rlc a
- clr _bitS_CLK
-
- setb _bitS_CLK
- mov c, _bitS_IN
- rlc a
- clr _bitS_CLK
-
- setb _bitS_CLK
- mov c, _bitS_IN
- rlc a
- clr _bitS_CLK
-
- mov dpl,a
- ret
- _endasm;
-}
-#endif
-
-static void
-read_bytes_msb (xdata unsigned char *buf, unsigned char len)
-{
- while (len-- != 0){
- *buf++ = read_byte_msb ();
- }
-}
-
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 00:38:28 +0000