720b854da2
Feature/i2c dump
* friendlier I2C "knock-knock" uses only read request
While many I2C slave devices have multiple indexed registers, some have
only one register and it's not indexed. For example, the I2C bus switch
TCA9548A has only a Control Register, attempting to index to "Reg[0]"
alters its contents to 0x00 disabling all subordinate buses. This patch
fixes that problem by simply trying to read something/anything from the
slave. This also helps coax out slaves with register files that start
from a higher index, i.e. the AT24CS0x, FLASH chips with a UUID that
appears as a 2nd I2C slave at (address+8), report their serial number at
Reg[80]-Reg[8F] and will NAK a read of Reg[0].
* modify get/set to prevent write of reg index if not specifed
* add 'dump' command to issue a single transaction
to retrieve multiple bytes from an I2C slave and register/offset.
* use NuttX' isprint()
* refactor to reduce coupling, hexdump only needs outstream
Approved-by: Gregory Nutt <gnutt@nuttx.org>
132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
|
|
/****************************************************************************
|
|
* apps/system/i2c/i2c_hexdump.c
|
|
*
|
|
* Copyright (C) 2005, 2016-2019 David S. Alessio. All rights reserved.
|
|
* Author: David S. Alessio <david.s.alessio@gmail.com>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <stdio.h>
|
|
#include <inttypes.h>
|
|
#include <ctype.h>
|
|
|
|
#include "i2ctool.h"
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: hexdump_line
|
|
****************************************************************************/
|
|
|
|
static int hexdump_line(FILE *ostream, void *addr, int len)
|
|
{
|
|
int i;
|
|
uint8_t *p;
|
|
|
|
if (len <= 0)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* print at most 16 chars */
|
|
if (len > 16)
|
|
{
|
|
len = 16;
|
|
}
|
|
|
|
/* print hex */
|
|
for (i = 0, p = addr; i < len; ++i, ++p)
|
|
{
|
|
if (i % 8 == 0)
|
|
{
|
|
fputc(' ', ostream);
|
|
}
|
|
|
|
fprintf(ostream, "%02x ", *p);
|
|
}
|
|
|
|
/* pad if necessary */
|
|
if (i <= 8)
|
|
{
|
|
fputc(' ', ostream);
|
|
}
|
|
|
|
while (i++ < 16)
|
|
{
|
|
fputs(" ", ostream);
|
|
}
|
|
|
|
/* print ASCII */
|
|
fputs(" |", ostream);
|
|
for (i = 0, p = addr; i < len; ++i, ++p)
|
|
{
|
|
fputc(isprint(*p) ? *p : '.', ostream);
|
|
}
|
|
|
|
/* pad if necessary */
|
|
while (i++ < 16)
|
|
{
|
|
fputc(' ', ostream);
|
|
}
|
|
|
|
fputs("|\n", ostream);
|
|
|
|
return len;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
void i2ctool_hexdump(FILE *outstream, void *addr, int len)
|
|
{
|
|
int nbytes;
|
|
uint8_t *p = addr;
|
|
|
|
/* print one line at a time */
|
|
while (len > 0)
|
|
{
|
|
/* print address */
|
|
fprintf(outstream, "%08x ", p - (uint8_t *) addr);
|
|
|
|
/* print one line of data */
|
|
nbytes = hexdump_line(outstream, p, len);
|
|
len -= nbytes;
|
|
p += nbytes;
|
|
}
|
|
}
|