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/*
* Copyright © 2010 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; version 2 of the License.
*
* 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.
*/
package altosui;
import java.lang.*;
import java.io.*;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.LinkedList;
import java.util.Iterator;
import altosui.AltosSerial;
import altosui.AltosRomconfig;
public class AltosDebug extends AltosSerial {
static final byte WR_CONFIG = 0x1d;
static final byte RD_CONFIG = 0x24;
static final byte CONFIG_TIMERS_OFF = (1 << 3);
static final byte CONFIG_DMA_PAUSE = (1 << 2);
static final byte CONFIG_TIMER_SUSPEND = (1 << 1);
static final byte SET_FLASH_INFO_PAGE = (1 << 0);
static final byte GET_PC = 0x28;
static final byte READ_STATUS = 0x34;
static final byte STATUS_CHIP_ERASE_DONE = (byte) (1 << 7);
static final byte STATUS_PCON_IDLE = (1 << 6);
static final byte STATUS_CPU_HALTED = (1 << 5);
static final byte STATUS_POWER_MODE_0 = (1 << 4);
static final byte STATUS_HALT_STATUS = (1 << 3);
static final byte STATUS_DEBUG_LOCKED = (1 << 2);
static final byte STATUS_OSCILLATOR_STABLE = (1 << 1);
static final byte STATUS_STACK_OVERFLOW = (1 << 0);
static final byte SET_HW_BRKPNT = 0x3b;
static byte HW_BRKPNT_N(byte n) { return (byte) ((n) << 3); }
static final byte HW_BRKPNT_N_MASK = (0x3 << 3);
static final byte HW_BRKPNT_ENABLE = (1 << 2);
static final byte HALT = 0x44;
static final byte RESUME = 0x4c;
static byte DEBUG_INSTR(byte n) { return (byte) (0x54|(n)); }
static final byte STEP_INSTR = 0x5c;
static byte STEP_REPLACE(byte n) { return (byte) (0x64|(n)); }
static final byte GET_CHIP_ID = 0x68;
static boolean ishex(int c) {
if ('0' <= c && c <= '9')
return true;
if ('a' <= c && c <= 'f')
return true;
if ('A' <= c && c <= 'F')
return true;
return false;
}
static boolean ishex(String s) {
for (int i = 0; i < s.length(); i++)
if (!ishex(s.charAt(i)))
return false;
return true;
}
static boolean isspace(int c) {
switch (c) {
case ' ':
case '\t':
return true;
}
return false;
}
static int fromhex(int c) {
if ('0' <= c && c <= '9')
return c - '0';
if ('a' <= c && c <= 'f')
return c - 'a' + 10;
if ('A' <= c && c <= 'F')
return c - 'A' + 10;
return -1;
}
boolean debug_mode;
void ensure_debug_mode() {
if (!debug_mode) {
printf("D\n");
debug_mode = true;
}
}
/*
* Write target memory
*/
public void write_memory(int address, byte[] bytes) {
ensure_debug_mode();
printf("O %x %x\n", bytes.length, address);
for (int i = 0; i < bytes.length; i++)
printf("%02x", bytes[i]);
}
/*
* Read target memory
*/
public byte[] read_memory(int address, int length)
throws IOException, InterruptedException {
byte[] data = new byte[length];
flush_reply();
ensure_debug_mode();
printf("I %x %x\n", length, address);
int i = 0;
while (i < length) {
String line = get_reply().trim();
if (!ishex(line) || line.length() % 2 != 0)
throw new IOException(
String.format
("Invalid reply \"%s\"", line));
int this_time = line.length() / 2;
for (int j = 0; j < this_time; j++)
data[j] = (byte) ((fromhex(line.charAt(j*2)) << 4) +
fromhex(line.charAt(j*2+1)));
i += this_time;
}
return data;
}
/*
* Write raw bytes to the debug link using the 'P' command
*/
public void write_bytes(byte[] bytes) throws IOException {
int i = 0;
ensure_debug_mode();
while (i < bytes.length) {
int this_time = bytes.length - i;
if (this_time > 8)
this_time = 0;
printf("P");
for (int j = 0; j < this_time; j++)
printf(" %02x", bytes[i+j]);
printf("\n");
i += this_time;
}
}
public void write_byte(byte b) throws IOException {
byte[] bytes = { b };
write_bytes(bytes);
}
/*
* Read raw bytes from the debug link using the 'G' command
*/
public byte[] read_bytes(int length)
throws IOException, InterruptedException {
flush_reply();
ensure_debug_mode();
printf("G %x\n", length);
int i = 0;
byte[] data = new byte[length];
while (i < length) {
String line = get_reply().trim();
String tokens[] = line.split("\\s+");
for (int j = 0; j < tokens.length; j++) {
if (!ishex(tokens[j]) ||
tokens[j].length() != 2)
throw new IOException(
String.format
("Invalid read_bytes reply \"%s\"", line));
try {
data[i + j] = (byte) Integer.parseInt(tokens[j], 16);
} catch (NumberFormatException ne) {
throw new IOException(
String.format
("Invalid read_bytes reply \"%s\"", line));
}
}
i += tokens.length;
}
return data;
}
public byte read_status() throws IOException, InterruptedException {
write_byte(READ_STATUS);
return read_bytes(2)[0];
}
public boolean check_connection() throws IOException, InterruptedException {
byte reply = read_status();
System.out.printf("status %x\n", reply);
if ((reply & STATUS_CHIP_ERASE_DONE) == 0)
return false;
if ((reply & STATUS_PCON_IDLE) != 0)
return false;
if ((reply & STATUS_POWER_MODE_0) == 0)
return false;
return true;
}
public AltosRomconfig romconfig() {
try {
byte[] bytes = read_memory(0xa0, 10);
return new AltosRomconfig(bytes, 0);
} catch (IOException ie) {
} catch (InterruptedException ie) {
}
return new AltosRomconfig();
}
/*
* Reset target
*/
public void reset() {
printf ("R\n");
}
}
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