2 * Copyright © 2008 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 "cp-usb-async.h"
27 static uint32_t cc_clock_us = CC_CLOCK_US;
28 static uint32_t cc_reset_us = CC_RESET_US;
31 ccdbg_set_clock(uint32_t us)
37 ccdbg_half_clock(struct ccdbg *dbg)
39 struct timespec req, rem;
40 req.tv_sec = (cc_clock_us / 2) / 1000000;
41 req.tv_nsec = ((cc_clock_us / 2) % 1000000) * 1000;
42 nanosleep(&req, &rem);
46 ccdbg_wait_reset(struct ccdbg *dbg)
48 struct timespec req, rem;
51 req.tv_sec = (cc_reset_us) / 1000000;
52 req.tv_nsec = ((cc_reset_us) % 1000000) * 1000;
53 nanosleep(&req, &rem);
61 dbg = calloc(sizeof (struct ccdbg), 1);
67 dbg->cp_async = cp_usb_async_open();
73 dbg->cp = cp_usb_open ();
83 ccdbg_close(struct ccdbg *dbg)
86 cp_usb_async_close(dbg->cp_async);
88 cp_usb_close(dbg->cp);
94 ccdbg_write(struct ccdbg *dbg, uint8_t mask, uint8_t value)
97 cp_usb_async_write(dbg->cp_async, mask, value);
99 cp_usb_write(dbg->cp, mask, value);
105 ccdbg_read(struct ccdbg *dbg, uint8_t *valuep)
108 cp_usb_async_read(dbg->cp_async, valuep);
110 *valuep = cp_usb_read(dbg->cp);
115 ccdbg_sync_io(struct ccdbg *dbg)
118 cp_usb_async_sync(dbg->cp_async);
123 is_bit(uint8_t get, uint8_t mask, char on, uint8_t bit)
134 ccdbg_print(char *format, uint8_t mask, uint8_t set)
136 ccdbg_debug (CC_DEBUG_BITBANG, format,
137 is_bit(set, mask, 'C', CC_CLOCK),
138 is_bit(set, mask, 'D', CC_DATA),
139 is_bit(set, mask, 'R', CC_RESET_N));
143 ccdbg_send(struct ccdbg *dbg, uint8_t mask, uint8_t set)
145 ccdbg_write(dbg, mask, set);
146 ccdbg_print("%c %c %c\n", mask, set);
147 ccdbg_half_clock(dbg);
151 ccdbg_send_bit(struct ccdbg *dbg, uint8_t bit)
153 if (bit) bit = CC_DATA;
154 ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|bit|CC_RESET_N);
155 ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, bit|CC_RESET_N);
159 ccdbg_send_byte(struct ccdbg *dbg, uint8_t byte)
162 ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Send Byte 0x%02x\n#\n", byte);
163 for (bit = 7; bit >= 0; bit--) {
164 ccdbg_send_bit(dbg, (byte >> bit) & 1);
166 ccdbg_debug(CC_DEBUG_BITBANG, "\n");
172 ccdbg_send_bytes(struct ccdbg *dbg, uint8_t *bytes, int nbytes)
175 ccdbg_send_byte(dbg, *bytes++);
179 ccdbg_recv_bit(struct ccdbg *dbg, int first, uint8_t *bit)
181 uint8_t mask = first ? CC_DATA : 0;
183 ccdbg_send(dbg, CC_CLOCK|mask|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N);
184 ccdbg_read(dbg, bit);
185 ccdbg_send(dbg, CC_CLOCK| CC_RESET_N, CC_RESET_N);
189 ccdbg_recv_byte(struct ccdbg *dbg, int first, uint8_t *bytep)
195 ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Recv byte\n#\n");
196 for (bit = 0; bit < 8; bit++) {
197 ccdbg_recv_bit(dbg, first, &bits[bit]);
201 for (bit = 0; bit < 8; bit++) {
203 byte |= (bits[bit] & CC_DATA) ? 1 : 0;
204 ccdbg_print("#\t%c %c %c\n", CC_DATA, bits[bit]);
206 ccdbg_debug(CC_DEBUG_BITBANG, "\n");
208 ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Recv 0x%02x\n#\n", byte);
213 ccdbg_recv_bytes(struct ccdbg *dbg, uint8_t *bytes, int nbytes)
217 for (i = 0; i < nbytes; i++) {
218 ccdbg_recv_byte(dbg, first, &bytes[i]);
224 ccdbg_cmd_write(struct ccdbg *dbg, uint8_t cmd, uint8_t *data, int len)
227 ccdbg_send_byte(dbg, cmd);
228 for (i = 0; i < len; i++)
229 ccdbg_send_byte(dbg, data[i]);
233 ccdbg_cmd_write_read8(struct ccdbg *dbg, uint8_t cmd, uint8_t *data, int len)
236 ccdbg_cmd_write(dbg, cmd, data, len);
237 ccdbg_recv_bytes(dbg, byte, 1);
242 ccdbg_cmd_write_read16(struct ccdbg *dbg, uint8_t cmd, uint8_t *data, int len)
245 ccdbg_cmd_write(dbg, cmd, data, len);
246 ccdbg_recv_bytes(dbg, byte, 2);
247 return (byte[0] << 8) | byte[1];