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 ccdbg_quarter_clock(struct ccdbg *dbg)
24 usleep(CC_CLOCK_US / 4);
28 ccdbg_half_clock(struct ccdbg *dbg)
30 usleep(CC_CLOCK_US / 2);
34 ccdbg_open(char *file)
38 dbg = calloc(sizeof (struct ccdbg), 1);
45 dbg->fd = open(file, 2);
52 cccp_write(dbg, CC_CLOCK, CC_CLOCK);
61 ccdbg_close(struct ccdbg *dbg)
73 ccdbg_write(struct ccdbg *dbg, uint8_t mask, uint8_t value)
76 return cccp_write(dbg, mask, value);
78 cp_usb_write(dbg, mask, value);
84 ccdbg_read(struct ccdbg *dbg)
87 return cccp_read_all(dbg);
89 return cp_usb_read(dbg);
94 is_bit(uint8_t get, uint8_t mask, char on, uint8_t bit)
105 ccdbg_print(char *format, uint8_t mask, uint8_t set)
107 ccdbg_debug (CC_DEBUG_BITBANG, format,
108 is_bit(set, mask, 'C', CC_CLOCK),
109 is_bit(set, mask, 'D', CC_DATA),
110 is_bit(set, mask, 'R', CC_RESET_N));
114 ccdbg_send(struct ccdbg *dbg, uint8_t mask, uint8_t set)
116 ccdbg_write(dbg, mask, set);
117 ccdbg_print("%c %c %c\n", mask, set);
118 ccdbg_half_clock(dbg);
122 ccdbg_send_bit(struct ccdbg *dbg, uint8_t bit)
124 if (bit) bit = CC_DATA;
125 ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|bit|CC_RESET_N);
126 ccdbg_send(dbg, CC_CLOCK|CC_DATA|CC_RESET_N, bit|CC_RESET_N);
130 ccdbg_send_byte(struct ccdbg *dbg, uint8_t byte)
133 ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Send Byte 0x%02x\n#\n", byte);
134 for (bit = 7; bit >= 0; bit--) {
135 ccdbg_send_bit(dbg, (byte >> bit) & 1);
137 ccdbg_debug(CC_DEBUG_BITBANG, "\n");
142 ccdbg_send_bytes(struct ccdbg *dbg, uint8_t *bytes, int nbytes)
145 ccdbg_send_byte(dbg, *bytes++);
149 ccdbg_recv_bit(struct ccdbg *dbg, int first)
151 uint8_t mask = first ? CC_DATA : 0;
154 ccdbg_send(dbg, CC_CLOCK|mask|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N);
155 read = ccdbg_read(dbg);
156 ccdbg_send(dbg, CC_CLOCK| CC_RESET_N, CC_RESET_N);
157 return (read & CC_DATA) ? 1 : 0;
161 ccdbg_recv_byte(struct ccdbg *dbg, int first)
166 ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Recv byte\n#\n");
167 for (bit = 0; bit < 8; bit++) {
169 byte |= ccdbg_recv_bit(dbg, first);
171 ccdbg_debug(CC_DEBUG_BITBANG, "\n");
174 ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Recv 0x%02x\n#\n", byte);
179 ccdbg_recv_bytes(struct ccdbg *dbg, uint8_t *bytes, int nbytes)
183 *bytes++ = ccdbg_recv_byte(dbg, first);
189 ccdbg_cmd_write(struct ccdbg *dbg, uint8_t cmd, uint8_t *data, int len)
192 ccdbg_send_byte(dbg, cmd);
193 for (i = 0; i < len; i++)
194 ccdbg_send_byte(dbg, data[i]);
198 ccdbg_cmd_write_read8(struct ccdbg *dbg, uint8_t cmd, uint8_t *data, int len)
201 ccdbg_cmd_write(dbg, cmd, data, len);
202 ccdbg_recv_bytes(dbg, byte, 1);
207 ccdbg_cmd_write_read16(struct ccdbg *dbg, uint8_t cmd, uint8_t *data, int len)
210 ccdbg_cmd_write(dbg, cmd, data, len);
211 ccdbg_recv_bytes(dbg, byte, 2);
212 return (byte[0] << 8) | byte[1];