2 * Copyright © 2010 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; version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
22 import java.util.concurrent.LinkedBlockingQueue;
23 import java.util.LinkedList;
24 import java.util.Iterator;
25 import altosui.AltosSerial;
26 import altosui.AltosRomconfig;
28 public class AltosDebug extends AltosSerial {
30 public static final byte WR_CONFIG = 0x1d;
31 public static final byte RD_CONFIG = 0x24;
32 public static final byte CONFIG_TIMERS_OFF = (1 << 3);
33 public static final byte CONFIG_DMA_PAUSE = (1 << 2);
34 public static final byte CONFIG_TIMER_SUSPEND = (1 << 1);
35 public static final byte SET_FLASH_INFO_PAGE = (1 << 0);
37 public static final byte GET_PC = 0x28;
38 public static final byte READ_STATUS = 0x34;
39 public static final byte STATUS_CHIP_ERASE_DONE = (byte) (1 << 7);
40 public static final byte STATUS_PCON_IDLE = (1 << 6);
41 public static final byte STATUS_CPU_HALTED = (1 << 5);
42 public static final byte STATUS_POWER_MODE_0 = (1 << 4);
43 public static final byte STATUS_HALT_STATUS = (1 << 3);
44 public static final byte STATUS_DEBUG_LOCKED = (1 << 2);
45 public static final byte STATUS_OSCILLATOR_STABLE = (1 << 1);
46 public static final byte STATUS_STACK_OVERFLOW = (1 << 0);
48 public static final byte SET_HW_BRKPNT = 0x3b;
49 public static byte HW_BRKPNT_N(byte n) { return (byte) ((n) << 3); }
50 public static final byte HW_BRKPNT_N_MASK = (0x3 << 3);
51 public static final byte HW_BRKPNT_ENABLE = (1 << 2);
53 public static final byte HALT = 0x44;
54 public static final byte RESUME = 0x4c;
55 public static byte DEBUG_INSTR(byte n) { return (byte) (0x54|(n)); }
56 public static final byte STEP_INSTR = 0x5c;
57 public static byte STEP_REPLACE(byte n) { return (byte) (0x64|(n)); }
58 public static final byte GET_CHIP_ID = 0x68;
61 static boolean ishex(int c) {
62 if ('0' <= c && c <= '9')
64 if ('a' <= c && c <= 'f')
66 if ('A' <= c && c <= 'F')
71 static boolean ishex(String s) {
72 for (int i = 0; i < s.length(); i++)
73 if (!ishex(s.charAt(i)))
77 static boolean isspace(int c) {
86 static int fromhex(int c) {
87 if ('0' <= c && c <= '9')
89 if ('a' <= c && c <= 'f')
91 if ('A' <= c && c <= 'F')
98 void ensure_debug_mode() {
106 void dump_memory(String header, int address, byte[] bytes, int start, int len) {
107 System.out.printf("%s\n", header);
108 for (int j = 0; j < len; j++) {
111 System.out.printf("\n");
112 System.out.printf ("%04x:", address + j);
114 System.out.printf(" %02x", bytes[start + j]);
116 System.out.printf("\n");
120 * Write target memory
122 public void write_memory(int address, byte[] bytes, int start, int len) {
124 // dump_memory("write_memory", address, bytes, start, len);
125 printf("O %x %x\n", len, address);
126 for (int i = 0; i < len; i++)
127 printf("%02x", bytes[start + i]);
130 public void write_memory(int address, byte[] bytes) {
131 write_memory(address, bytes, 0, bytes.length);
137 public byte[] read_memory(int address, int length)
138 throws IOException, InterruptedException {
139 byte[] data = new byte[length];
143 printf("I %x %x\n", length, address);
147 String line = get_reply().trim();
148 if (!ishex(line) || line.length() % 2 != 0)
149 throw new IOException(
151 ("Invalid reply \"%s\"", line));
152 int this_time = line.length() / 2;
153 for (int j = 0; j < this_time; j++)
154 data[start + j] = (byte) ((fromhex(line.charAt(j*2)) << 4) +
155 fromhex(line.charAt(j*2+1)));
159 // dump_memory("read_memory", address, data, 0, length);
165 * Write raw bytes to the debug link using the 'P' command
167 public void write_bytes(byte[] bytes) throws IOException {
170 while (i < bytes.length) {
171 int this_time = bytes.length - i;
175 for (int j = 0; j < this_time; j++)
176 printf(" %02x", bytes[i+j]);
182 public void write_byte(byte b) throws IOException {
183 byte[] bytes = { b };
188 * Read raw bytes from the debug link using the 'G' command
190 public byte[] read_bytes(int length)
191 throws IOException, InterruptedException {
195 printf("G %x\n", length);
197 byte[] data = new byte[length];
199 String line = get_reply().trim();
200 String tokens[] = line.split("\\s+");
201 for (int j = 0; j < tokens.length; j++) {
202 if (!ishex(tokens[j]) ||
203 tokens[j].length() != 2)
204 throw new IOException(
206 ("Invalid read_bytes reply \"%s\"", line));
208 data[i + j] = (byte) Integer.parseInt(tokens[j], 16);
209 } catch (NumberFormatException ne) {
210 throw new IOException(
212 ("Invalid read_bytes reply \"%s\"", line));
220 public byte read_byte() throws IOException, InterruptedException {
221 return read_bytes(1)[0];
224 public byte debug_instr(byte[] instruction) throws IOException, InterruptedException {
225 byte[] command = new byte[1 + instruction.length];
226 command[0] = DEBUG_INSTR((byte) instruction.length);
227 for (int i = 0; i < instruction.length; i++)
228 command[i+1] = instruction[i];
229 write_bytes(command);
233 public byte resume() throws IOException, InterruptedException {
238 public int read_uint16() throws IOException, InterruptedException {
239 byte[] d = read_bytes(2);
240 return ((int) (d[0] & 0xff) << 8) | (d[1] & 0xff);
243 public int read_uint8() throws IOException, InterruptedException {
244 byte[] d = read_bytes(1);
245 return (int) (d[0] & 0xff);
248 public int get_chip_id() throws IOException, InterruptedException {
249 write_byte(GET_CHIP_ID);
250 return read_uint16();
253 public int get_pc() throws IOException, InterruptedException {
255 return read_uint16();
258 public byte read_status() throws IOException, InterruptedException {
259 write_byte(READ_STATUS);
263 static final byte LJMP = 0x02;
265 public void set_pc(int pc) throws IOException, InterruptedException {
266 byte high = (byte) (pc >> 8);
267 byte low = (byte) pc;
268 byte[] jump_mem = { LJMP, high, low };
269 debug_instr(jump_mem);
272 public boolean check_connection() throws IOException, InterruptedException {
273 byte reply = read_status();
274 if ((reply & STATUS_CHIP_ERASE_DONE) == 0)
276 if ((reply & STATUS_PCON_IDLE) != 0)
278 if ((reply & STATUS_POWER_MODE_0) == 0)
283 public AltosRomconfig romconfig() {
285 byte[] bytes = read_memory(0xa0, 10);
286 return new AltosRomconfig(bytes, 0);
287 } catch (IOException ie) {
288 } catch (InterruptedException ie) {
290 return new AltosRomconfig();
296 public void reset() {