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Add dcc debug write and fix mcu part number

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This commit is contained in:
Arti Zirk
2021-06-26 11:34:10 +03:00
parent b1a4be5661
commit b7d241746c
12 changed files with 367 additions and 11 deletions
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18
libdcc/README Normal file
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This code is an example of using the openocd debug message system.
Before the message output is seen in the debug window, the functionality
will need enabling:
From the gdb prompt:
monitor target_request debugmsgs enable
monitor trace point 1
From the Telnet prompt:
target_request debugmsgs enable
trace point 1
To see how many times the trace point was hit:
(monitor) trace point 1
Spen
spen@spen-soft.co.uk

155
libdcc/dcc_stdio.c Normal file
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/***************************************************************************
* Copyright (C) 2008 by Dominic Rath *
* Dominic.Rath@gmx.de *
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
* Copyright (C) 2008 by Frederik Kriewtz *
* frederik@kriewitz.eu *
* *
* 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; either version 2 of the License, or *
* (at your option) any later version. *
* *
* 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, see <http://www.gnu.org/licenses/>. *
***************************************************************************/
#include "dcc_stdio.h"
#define TARGET_REQ_TRACEMSG 0x00
#define TARGET_REQ_DEBUGMSG_ASCII 0x01
#define TARGET_REQ_DEBUGMSG_HEXMSG(size) (0x01 | ((size & 0xff) << 8))
#define TARGET_REQ_DEBUGCHAR 0x02
#if defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__) || defined(__ARM_ARCH_6SM__)
/* we use the System Control Block DCRDR reg to simulate a arm7_9 dcc channel
* DCRDR[7:0] is used by target for status
* DCRDR[15:8] is used by target for write buffer
* DCRDR[23:16] is used for by host for status
* DCRDR[31:24] is used for by host for write buffer */
#define NVIC_DBG_DATA_R (*((volatile unsigned short *)0xE000EDF8))
#define BUSY 1
void dbg_write(unsigned long dcc_data)
{
int len = 4;
while (len--)
{
/* wait for data ready */
while (NVIC_DBG_DATA_R & BUSY);
/* write our data and set write flag - tell host there is data*/
NVIC_DBG_DATA_R = (unsigned short)(((dcc_data & 0xff) << 8) | BUSY);
dcc_data >>= 8;
}
}
#elif defined(__ARM_ARCH_4T__) || defined(__ARM_ARCH_5TE__) || defined(__ARM_ARCH_5T__)
void dbg_write(unsigned long dcc_data)
{
unsigned long dcc_status;
do {
asm volatile("mrc p14, 0, %0, c0, c0" : "=r" (dcc_status));
} while (dcc_status & 0x2);
asm volatile("mcr p14, 0, %0, c1, c0" : : "r" (dcc_data));
}
#else
#error unsupported target
#endif
void dbg_trace_point(unsigned long number)
{
dbg_write(TARGET_REQ_TRACEMSG | (number << 8));
}
void dbg_write_u32(const unsigned long *val, long len)
{
dbg_write(TARGET_REQ_DEBUGMSG_HEXMSG(4) | ((len & 0xffff) << 16));
while (len > 0)
{
dbg_write(*val);
val++;
len--;
}
}
void dbg_write_u16(const unsigned short *val, long len)
{
unsigned long dcc_data;
dbg_write(TARGET_REQ_DEBUGMSG_HEXMSG(2) | ((len & 0xffff) << 16));
while (len > 0)
{
dcc_data = val[0]
| ((len > 1) ? val[1] << 16: 0x0000);
dbg_write(dcc_data);
val += 2;
len -= 2;
}
}
void dbg_write_u8(const unsigned char *val, long len)
{
unsigned long dcc_data;
dbg_write(TARGET_REQ_DEBUGMSG_HEXMSG(1) | ((len & 0xffff) << 16));
while (len > 0)
{
dcc_data = val[0]
| ((len > 1) ? val[1] << 8 : 0x00)
| ((len > 2) ? val[2] << 16 : 0x00)
| ((len > 3) ? val[3] << 24 : 0x00);
dbg_write(dcc_data);
val += 4;
len -= 4;
}
}
void dbg_write_str(const char *msg)
{
long len;
unsigned long dcc_data;
for (len = 0; msg[len] && (len < 65536); len++);
dbg_write(TARGET_REQ_DEBUGMSG_ASCII | ((len & 0xffff) << 16));
while (len > 0)
{
dcc_data = msg[0]
| ((len > 1) ? msg[1] << 8 : 0x00)
| ((len > 2) ? msg[2] << 16 : 0x00)
| ((len > 3) ? msg[3] << 24 : 0x00);
dbg_write(dcc_data);
msg += 4;
len -= 4;
}
}
void dbg_write_char(char msg)
{
dbg_write(TARGET_REQ_DEBUGCHAR | ((msg & 0xff) << 16));
}

35
libdcc/dcc_stdio.h Normal file
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/***************************************************************************
* Copyright (C) 2008 by Dominic Rath *
* Dominic.Rath@gmx.de *
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
* *
* 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; either version 2 of the License, or *
* (at your option) any later version. *
* *
* 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, see <http://www.gnu.org/licenses/>. *
***************************************************************************/
#ifndef DCC_STDIO_H
#define DCC_STDIO_H
void dbg_write(unsigned long dcc_data);
void dbg_trace_point(unsigned long number);
void dbg_write_u32(const unsigned long *val, long len);
void dbg_write_u16(const unsigned short *val, long len);
void dbg_write_u8(const unsigned char *val, long len);
void dbg_write_str(const char *msg);
void dbg_write_char(char msg);
#endif /* DCC_STDIO_H */

56
libdcc/example.c Normal file
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/***************************************************************************
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
* Copyright (C) 2008 by Frederik Kriewtz *
* frederik@kriewitz.eu *
* *
* 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; either version 2 of the License, or *
* (at your option) any later version. *
* *
* 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, see <http://www.gnu.org/licenses/>. *
***************************************************************************/
#include "dcc_stdio.h"
/* enable openocd debugmsg at the gdb prompt:
* monitor target_request debugmsgs enable
*
* create a trace point:
* monitor trace point 1
*
* to show how often the trace point was hit:
* monitor trace point
*/
int main(void)
{
dbg_write_str("hello world");
dbg_write_char('t');
dbg_write_char('e');
dbg_write_char('s');
dbg_write_char('t');
dbg_write_char('\n');
unsigned long test_u32 = 0x01234567;
dbg_write_u32(&test_u32, 1);
static const unsigned short test_u16[] = {0x0123, 0x4567, 0x89AB, 0xCDEF, 0x0123, 0x4567, 0x89AB, 0xCDEF};
dbg_write_u16(test_u16, 8);
static const unsigned char test_u8[] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0XDD, 0xEE, 0xFF};
dbg_write_u8(test_u8, 16);
while(1)
{
dbg_trace_point(0);
}
}