diff options
Diffstat (limited to 'lib/cc-bitbang.c')
| -rw-r--r-- | lib/cc-bitbang.c | 269 |
1 files changed, 0 insertions, 269 deletions
diff --git a/lib/cc-bitbang.c b/lib/cc-bitbang.c deleted file mode 100644 index 1d3ba476..00000000 --- a/lib/cc-bitbang.c +++ /dev/null @@ -1,269 +0,0 @@ -/* - * Copyright © 2009 Keith Packard <keithp@keithp.com> - * - * 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 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, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. - */ - -#include <time.h> -#include <stdio.h> -#include <stdlib.h> -#include "ccdbg-debug.h" -#include "cc-bitbang.h" - -#define CP_USB_ASYNC - -#ifdef CP_USB_ASYNC -#include "cp-usb-async.h" -#else -#include "cp-usb.h" -#endif - -struct cc_bitbang { -#ifdef CP_USB_ASYNC - struct cp_usb_async *cp_async; -#else - struct cp_usb *cp; -#endif -}; - -static uint32_t cc_clock_us = CC_CLOCK_US; -static uint32_t cc_reset_us = CC_RESET_US; - -void -cc_bitbang_set_clock(uint32_t us) -{ - cc_clock_us = us; -} - -void -cc_bitbang_half_clock(struct cc_bitbang *bb) -{ - struct timespec req, rem; - req.tv_sec = (cc_clock_us / 2) / 1000000; - req.tv_nsec = ((cc_clock_us / 2) % 1000000) * 1000; - nanosleep(&req, &rem); -} - -void -cc_bitbang_wait_reset(struct cc_bitbang *bb) -{ - struct timespec req, rem; - - cc_bitbang_sync(bb); - req.tv_sec = (cc_reset_us) / 1000000; - req.tv_nsec = ((cc_reset_us) % 1000000) * 1000; - nanosleep(&req, &rem); -} - -struct cc_bitbang * -cc_bitbang_open(void) -{ - struct cc_bitbang *bb; - - bb = calloc(sizeof (struct cc_bitbang), 1); - if (!bb) { - perror("calloc"); - return NULL; - } -#ifdef CP_USB_ASYNC - bb->cp_async = cp_usb_async_open(); - if (!bb->cp_async) { - free (bb); - return NULL; - } -#else - bb->cp = cp_usb_open (); - if (!bb->cp) { - free (bb); - return NULL; - } -#endif - return bb; -} - -void -cc_bitbang_close(struct cc_bitbang *bb) -{ -#ifdef CP_USB_ASYNC - cp_usb_async_close(bb->cp_async); -#else - cp_usb_close(bb->cp); -#endif - free (bb); -} - -void -cc_bitbang_debug_mode(struct cc_bitbang *bb) -{ - /* force two rising clocks while holding RESET_N low */ - ccdbg_debug(CC_DEBUG_COMMAND, "#\n"); - ccdbg_debug(CC_DEBUG_COMMAND, "# Debug mode\n"); - ccdbg_debug(CC_DEBUG_COMMAND, "#\n"); - cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N); - cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_DATA ); - cc_bitbang_wait_reset(bb); - cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA ); - cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_DATA ); - cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA ); - cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_DATA|CC_RESET_N); - cc_bitbang_wait_reset(bb); -} - -void -cc_bitbang_reset(struct cc_bitbang *bb) -{ - ccdbg_debug(CC_DEBUG_COMMAND, "#\n"); - ccdbg_debug(CC_DEBUG_COMMAND, "# Reset\n"); - ccdbg_debug(CC_DEBUG_COMMAND, "#\n"); - cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N); - cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA ); - cc_bitbang_wait_reset(bb); - cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA ); - cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA ); - cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA ); - cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N); - cc_bitbang_wait_reset(bb); -} - -int -cc_bitbang_write(struct cc_bitbang *bb, uint8_t mask, uint8_t value) -{ -#ifdef CP_USB_ASYNC - cp_usb_async_write(bb->cp_async, mask, value); -#else - cp_usb_write(bb->cp, mask, value); -#endif - return 0; -} - -void -cc_bitbang_read(struct cc_bitbang *bb, uint8_t *valuep) -{ -#ifdef CP_USB_ASYNC - cp_usb_async_read(bb->cp_async, valuep); -#else - *valuep = cp_usb_read(bb->cp); -#endif -} - -void -cc_bitbang_sync(struct cc_bitbang *bb) -{ -#ifdef CP_USB_ASYNC - cp_usb_async_sync(bb->cp_async); -#endif -} - -static char -is_bit(uint8_t get, uint8_t mask, char on, uint8_t bit) -{ - if (mask&bit) { - if (get&bit) - return on; - else - return '.'; - } else - return '-'; -} - -void -cc_bitbang_print(char *format, uint8_t mask, uint8_t set) -{ - ccdbg_debug (CC_DEBUG_BITBANG, format, - is_bit(set, mask, 'C', CC_CLOCK), - is_bit(set, mask, 'D', CC_DATA), - is_bit(set, mask, 'R', CC_RESET_N)); -} - -void -cc_bitbang_send(struct cc_bitbang *bb, uint8_t mask, uint8_t set) -{ - cc_bitbang_write(bb, mask, set); - cc_bitbang_print("%c %c %c\n", mask, set); - cc_bitbang_half_clock(bb); -} - -void -cc_bitbang_send_bit(struct cc_bitbang *bb, uint8_t bit) -{ - if (bit) bit = CC_DATA; - cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|bit|CC_RESET_N); - cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, bit|CC_RESET_N); -} - -void -cc_bitbang_send_byte(struct cc_bitbang *bb, uint8_t byte) -{ - int bit; - ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Send Byte 0x%02x\n#\n", byte); - for (bit = 7; bit >= 0; bit--) { - cc_bitbang_send_bit(bb, (byte >> bit) & 1); - if (bit == 3) - ccdbg_debug(CC_DEBUG_BITBANG, "\n"); - } - cc_bitbang_sync(bb); -} - -void -cc_bitbang_send_bytes(struct cc_bitbang *bb, uint8_t *bytes, int nbytes) -{ - while (nbytes--) - cc_bitbang_send_byte(bb, *bytes++); -} - -void -cc_bitbang_recv_bit(struct cc_bitbang *bb, int first, uint8_t *bit) -{ - uint8_t mask = first ? CC_DATA : 0; - - cc_bitbang_send(bb, CC_CLOCK|mask|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N); - cc_bitbang_read(bb, bit); - cc_bitbang_send(bb, CC_CLOCK| CC_RESET_N, CC_RESET_N); -} - -void -cc_bitbang_recv_byte(struct cc_bitbang *bb, int first, uint8_t *bytep) -{ - uint8_t byte = 0; - uint8_t bits[8]; - int bit; - - ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Recv byte\n#\n"); - for (bit = 0; bit < 8; bit++) { - cc_bitbang_recv_bit(bb, first, &bits[bit]); - first = 0; - } - cc_bitbang_sync(bb); - for (bit = 0; bit < 8; bit++) { - byte = byte << 1; - byte |= (bits[bit] & CC_DATA) ? 1 : 0; - cc_bitbang_print("#\t%c %c %c\n", CC_DATA, bits[bit]); - if (bit == 3) - ccdbg_debug(CC_DEBUG_BITBANG, "\n"); - } - ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Recv 0x%02x\n#\n", byte); - *bytep = byte; -} - -void -cc_bitbang_recv_bytes(struct cc_bitbang *bb, uint8_t *bytes, int nbytes) -{ - int i; - int first = 1; - for (i = 0; i < nbytes; i++) { - cc_bitbang_recv_byte(bb, first, &bytes[i]); - first = 0; - } -} |