2 * Copyright © 2009 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
22 #include "ccdbg-debug.h"
23 #include "cc-bitbang.h"
28 #include "cp-usb-async.h"
35 struct cp_usb_async *cp_async;
41 static uint32_t cc_clock_us = CC_CLOCK_US;
42 static uint32_t cc_reset_us = CC_RESET_US;
45 cc_bitbang_set_clock(uint32_t us)
51 cc_bitbang_half_clock(struct cc_bitbang *bb)
53 struct timespec req, rem;
54 req.tv_sec = (cc_clock_us / 2) / 1000000;
55 req.tv_nsec = ((cc_clock_us / 2) % 1000000) * 1000;
56 nanosleep(&req, &rem);
60 cc_bitbang_wait_reset(struct cc_bitbang *bb)
62 struct timespec req, rem;
65 req.tv_sec = (cc_reset_us) / 1000000;
66 req.tv_nsec = ((cc_reset_us) % 1000000) * 1000;
67 nanosleep(&req, &rem);
73 struct cc_bitbang *bb;
75 bb = calloc(sizeof (struct cc_bitbang), 1);
81 bb->cp_async = cp_usb_async_open();
87 bb->cp = cp_usb_open ();
97 cc_bitbang_close(struct cc_bitbang *bb)
100 cp_usb_async_close(bb->cp_async);
102 cp_usb_close(bb->cp);
108 cc_bitbang_debug_mode(struct cc_bitbang *bb)
110 /* force two rising clocks while holding RESET_N low */
111 ccdbg_debug(CC_DEBUG_COMMAND, "#\n");
112 ccdbg_debug(CC_DEBUG_COMMAND, "# Debug mode\n");
113 ccdbg_debug(CC_DEBUG_COMMAND, "#\n");
114 cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N);
115 cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_DATA );
116 cc_bitbang_wait_reset(bb);
117 cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
118 cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_DATA );
119 cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
120 cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_DATA|CC_RESET_N);
121 cc_bitbang_wait_reset(bb);
125 cc_bitbang_reset(struct cc_bitbang *bb)
127 ccdbg_debug(CC_DEBUG_COMMAND, "#\n");
128 ccdbg_debug(CC_DEBUG_COMMAND, "# Reset\n");
129 ccdbg_debug(CC_DEBUG_COMMAND, "#\n");
130 cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N);
131 cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
132 cc_bitbang_wait_reset(bb);
133 cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
134 cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
135 cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
136 cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N);
137 cc_bitbang_wait_reset(bb);
141 cc_bitbang_write(struct cc_bitbang *bb, uint8_t mask, uint8_t value)
144 cp_usb_async_write(bb->cp_async, mask, value);
146 cp_usb_write(bb->cp, mask, value);
152 cc_bitbang_read(struct cc_bitbang *bb, uint8_t *valuep)
155 cp_usb_async_read(bb->cp_async, valuep);
157 *valuep = cp_usb_read(bb->cp);
162 cc_bitbang_sync(struct cc_bitbang *bb)
165 cp_usb_async_sync(bb->cp_async);
170 is_bit(uint8_t get, uint8_t mask, char on, uint8_t bit)
182 cc_bitbang_print(char *format, uint8_t mask, uint8_t set)
184 ccdbg_debug (CC_DEBUG_BITBANG, format,
185 is_bit(set, mask, 'C', CC_CLOCK),
186 is_bit(set, mask, 'D', CC_DATA),
187 is_bit(set, mask, 'R', CC_RESET_N));
191 cc_bitbang_send(struct cc_bitbang *bb, uint8_t mask, uint8_t set)
193 cc_bitbang_write(bb, mask, set);
194 cc_bitbang_print("%c %c %c\n", mask, set);
195 cc_bitbang_half_clock(bb);
199 cc_bitbang_send_bit(struct cc_bitbang *bb, uint8_t bit)
201 if (bit) bit = CC_DATA;
202 cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|bit|CC_RESET_N);
203 cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, bit|CC_RESET_N);
207 cc_bitbang_send_byte(struct cc_bitbang *bb, uint8_t byte)
210 ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Send Byte 0x%02x\n#\n", byte);
211 for (bit = 7; bit >= 0; bit--) {
212 cc_bitbang_send_bit(bb, (byte >> bit) & 1);
214 ccdbg_debug(CC_DEBUG_BITBANG, "\n");
220 cc_bitbang_send_bytes(struct cc_bitbang *bb, uint8_t *bytes, int nbytes)
223 cc_bitbang_send_byte(bb, *bytes++);
227 cc_bitbang_recv_bit(struct cc_bitbang *bb, int first, uint8_t *bit)
229 uint8_t mask = first ? CC_DATA : 0;
231 cc_bitbang_send(bb, CC_CLOCK|mask|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N);
232 cc_bitbang_read(bb, bit);
233 cc_bitbang_send(bb, CC_CLOCK| CC_RESET_N, CC_RESET_N);
237 cc_bitbang_recv_byte(struct cc_bitbang *bb, int first, uint8_t *bytep)
243 ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Recv byte\n#\n");
244 for (bit = 0; bit < 8; bit++) {
245 cc_bitbang_recv_bit(bb, first, &bits[bit]);
249 for (bit = 0; bit < 8; bit++) {
251 byte |= (bits[bit] & CC_DATA) ? 1 : 0;
252 cc_bitbang_print("#\t%c %c %c\n", CC_DATA, bits[bit]);
254 ccdbg_debug(CC_DEBUG_BITBANG, "\n");
256 ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Recv 0x%02x\n#\n", byte);
261 cc_bitbang_recv_bytes(struct cc_bitbang *bb, uint8_t *bytes, int nbytes)
265 for (i = 0; i < nbytes; i++) {
266 cc_bitbang_recv_byte(bb, first, &bytes[i]);