2011-08-29 22:12:03 +02:00
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/****************************************************************************
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* apps/system/i2c/i2c_set.c
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*
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2016-02-02 17:27:50 +01:00
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* Copyright (C) 2011, 2016 Gregory Nutt. All rights reserved.
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2012-09-13 18:58:49 +02:00
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* Author: Gregory Nutt <gnutt@nuttx.org>
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2011-08-29 22:12:03 +02:00
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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2011-08-30 17:07:21 +02:00
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#include <stdlib.h>
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2016-01-30 15:00:59 +01:00
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#include <nuttx/i2c/i2c_master.h>
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2011-08-30 01:06:54 +02:00
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2011-08-29 22:12:03 +02:00
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#include "i2ctool.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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2011-09-18 19:52:00 +02:00
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* Name: i2ccmd_set
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2011-08-29 22:12:03 +02:00
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****************************************************************************/
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2011-09-18 19:52:00 +02:00
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int i2ccmd_set(FAR struct i2ctool_s *i2ctool, int argc, FAR char **argv)
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2011-08-29 22:12:03 +02:00
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{
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2011-08-30 17:07:21 +02:00
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FAR char *ptr;
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2011-09-18 19:52:00 +02:00
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uint8_t regaddr;
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2011-08-30 17:07:21 +02:00
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long value;
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2021-02-23 13:50:54 +01:00
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long repetitions;
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2011-08-30 01:06:54 +02:00
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int nargs;
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2011-08-30 17:07:21 +02:00
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int argndx;
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int ret;
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2016-02-02 17:27:50 +01:00
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int fd;
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2011-09-18 19:52:00 +02:00
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int i;
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2011-08-30 01:06:54 +02:00
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/* Parse any command line arguments */
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2011-08-30 17:07:21 +02:00
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for (argndx = 1; argndx < argc; )
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2011-08-30 01:06:54 +02:00
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{
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2011-08-30 17:07:21 +02:00
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/* Break out of the look when the last option has been parsed */
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ptr = argv[argndx];
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if (*ptr != '-')
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{
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break;
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}
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/* Otherwise, check for common options */
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2017-05-19 15:13:12 +02:00
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nargs = i2ctool_common_args(i2ctool, &argv[argndx]);
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2011-08-30 01:06:54 +02:00
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if (nargs < 0)
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{
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return ERROR;
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}
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2011-08-30 17:07:21 +02:00
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argndx += nargs;
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}
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2011-09-18 19:52:00 +02:00
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/* There must be at least one more thing on the command line: The value
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2011-08-30 17:07:21 +02:00
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* to be written.
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*/
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if (argndx < argc)
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{
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value = strtol(argv[argndx], NULL, 16);
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if (i2ctool->width == 8)
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{
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if (value < 0 || value > 255)
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{
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i2ctool_printf(i2ctool, g_i2cargrange, argv[0]);
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return ERROR;
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}
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}
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else if (value < 0 || value > 65535)
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{
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i2ctool_printf(i2ctool, g_i2cargrange, argv[0]);
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return ERROR;
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}
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argndx++;
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}
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else
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{
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i2ctool_printf(i2ctool, g_i2cargrequired, argv[0]);
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return ERROR;
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}
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2020-02-23 05:51:44 +01:00
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/* There may be one more thing on the command line: The repetition
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2011-09-18 19:52:00 +02:00
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* count.
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*/
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2021-02-23 13:50:54 +01:00
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repetitions = 1;
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2011-09-18 19:52:00 +02:00
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if (argndx < argc)
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{
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2021-02-23 13:50:54 +01:00
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repetitions = strtol(argv[argndx], NULL, 16);
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if (repetitions < 1)
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2011-09-18 19:52:00 +02:00
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{
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i2ctool_printf(i2ctool, g_i2cargrange, argv[0]);
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return ERROR;
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}
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argndx++;
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}
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2011-08-30 17:07:21 +02:00
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if (argndx != argc)
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{
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i2ctool_printf(i2ctool, g_i2ctoomanyargs, argv[0]);
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return ERROR;
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2011-08-30 01:06:54 +02:00
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}
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/* Get a handle to the I2C bus */
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2016-02-02 21:42:16 +01:00
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fd = i2cdev_open(i2ctool->bus);
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2016-02-02 17:27:50 +01:00
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if (fd < 0)
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2011-08-30 01:06:54 +02:00
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{
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i2ctool_printf(i2ctool, "Failed to get bus %d\n", i2ctool->bus);
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return ERROR;
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}
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2021-02-23 13:50:54 +01:00
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/* Loop for the requested number of repetitions */
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2011-09-18 19:52:00 +02:00
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regaddr = i2ctool->regaddr;
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ret = OK;
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2021-02-23 13:50:54 +01:00
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for (i = 0; i < repetitions; i++)
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2011-09-18 19:52:00 +02:00
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{
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/* Write to the I2C bus */
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2016-02-02 17:27:50 +01:00
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ret = i2ctool_set(i2ctool, fd, regaddr, (uint16_t)value);
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2011-09-18 19:52:00 +02:00
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/* Display the result */
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if (ret == OK)
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{
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i2ctool_printf(i2ctool, "WROTE Bus: %d Addr: %02x Subaddr: %02x Value: ",
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i2ctool->bus, i2ctool->addr, i2ctool->regaddr);
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if (i2ctool->width == 8)
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{
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i2ctool_printf(i2ctool, "%02x\n", (int)value);
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}
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else
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{
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i2ctool_printf(i2ctool, "%04x\n", (int)value);
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}
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}
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else
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{
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i2ctool_printf(i2ctool, g_i2cxfrerror, argv[0], -ret);
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break;
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}
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/* Auto-increment the address if so configured */
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if (i2ctool->autoincr)
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{
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regaddr++;
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}
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}
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2020-01-02 13:09:50 +01:00
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close(fd);
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2011-09-18 19:52:00 +02:00
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return ret;
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}
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/****************************************************************************
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* Name: i2ctool_set
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****************************************************************************/
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2016-02-02 17:27:50 +01:00
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int i2ctool_set(FAR struct i2ctool_s *i2ctool, int fd, uint8_t regaddr,
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uint16_t value)
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2011-09-18 19:52:00 +02:00
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{
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struct i2c_msg_s msg[2];
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union
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{
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uint16_t data16;
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uint8_t data8;
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} u;
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int ret;
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2011-08-30 17:07:21 +02:00
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2019-08-20 22:29:21 +02:00
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if (i2ctool->hasregindx)
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{
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/* Set up data structures */
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2016-02-01 21:14:48 +01:00
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2019-08-20 22:29:21 +02:00
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msg[0].frequency = i2ctool->freq;
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msg[0].addr = i2ctool->addr;
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msg[0].flags = I2C_M_NOSTOP;
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msg[0].buffer = ®addr;
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msg[0].length = 1;
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2018-08-03 16:47:02 +02:00
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2019-08-20 22:29:21 +02:00
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msg[1].frequency = i2ctool->freq;
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msg[1].addr = i2ctool->addr;
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msg[1].flags = 0;
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2011-08-30 17:07:21 +02:00
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2019-08-20 22:29:21 +02:00
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if (i2ctool->width == 8)
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{
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u.data8 = (uint8_t)value;
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msg[1].buffer = &u.data8;
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msg[1].length = 1;
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}
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else
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2011-08-30 17:07:21 +02:00
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{
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2019-08-20 22:29:21 +02:00
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u.data16 = value;
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msg[1].buffer = (uint8_t*)&u.data16;
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msg[1].length = 2;
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}
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if (i2ctool->start)
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{
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ret = i2cdev_transfer(fd, &msg[0], 1);
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if (ret == OK)
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{
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ret = i2cdev_transfer(fd, &msg[1], 1);
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}
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}
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else
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{
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msg[1].flags |= I2C_M_NOSTART;
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ret = i2cdev_transfer(fd, msg, 2);
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2011-08-30 17:07:21 +02:00
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}
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}
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else
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{
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2019-08-20 22:29:21 +02:00
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/* no register index "-r" has been specified so
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* we don't send a register index, just do the write
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*/
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msg[0].frequency = i2ctool->freq;
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msg[0].addr = i2ctool->addr;
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msg[0].flags = 0;
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if (i2ctool->width == 8)
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{
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u.data8 = (uint8_t)value;
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msg[0].buffer = &u.data8;
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msg[0].length = 1;
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}
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else
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{
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u.data16 = value;
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msg[0].buffer = (uint8_t*)&u.data16;
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msg[0].length = 2;
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}
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ret = i2cdev_transfer(fd, msg, 1);
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2011-08-30 17:07:21 +02:00
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}
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2011-09-18 19:52:00 +02:00
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return ret;
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2011-08-29 22:12:03 +02:00
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}
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