diff options
Diffstat (limited to 'apps/system/i2c/i2c_common.c')
-rw-r--r-- | apps/system/i2c/i2c_common.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/apps/system/i2c/i2c_common.c b/apps/system/i2c/i2c_common.c new file mode 100644 index 000000000..e7b27693a --- /dev/null +++ b/apps/system/i2c/i2c_common.c @@ -0,0 +1,216 @@ +/**************************************************************************** + * apps/system/i2c/i2c_common.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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 <nuttx/config.h> + +#include <stdlib.h> + +#include "i2ctool.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: common_args + ****************************************************************************/ + +int common_args(FAR struct i2ctool_s *i2ctool, FAR char **arg) +{ + FAR char *ptr = *arg; + long value; + int ret; + + if (ptr[0] != '-') + { + goto invalid_argument; + } + + switch (ptr[1]) + { + case 'a': + ret = arg_hex(arg, &value); + if (value < CONFIG_I2CTOOL_MINADDR || value > CONFIG_I2CTOOL_MAXADDR) + { + goto out_of_range; + } + + i2ctool->addr = (uint8_t) value; + return ret; + + case 'b': + ret = arg_decimal(arg, &value); + if (value < CONFIG_I2CTOOL_MINBUS || value > CONFIG_I2CTOOL_MAXBUS) + { + goto out_of_range; + } + + i2ctool->bus = (uint8_t) value; + return ret; + + case 'f': + ret = arg_decimal(arg, &value); + if (value == 0) + { + goto out_of_range; + } + + i2ctool->freq = value; + return ret; + + case 'i': + i2ctool->autoincr = true; + return 1; + + case 'j': + i2ctool->autoincr = false; + return 1; + + case 'n': + i2ctool->start = false; + return 1; + + case 'r': + ret = arg_hex(arg, &value); + if (value < 0 || value > CONFIG_I2CTOOL_MAXREGADDR) + { + goto out_of_range; + } + + i2ctool->regaddr = (uint8_t) value; + return ret; + + case 's': + i2ctool->start = true; + return 1; + + case 'w': + ret = arg_decimal(arg, &value); + if (value != 8 && value != 16) + { + goto out_of_range; + } + + i2ctool->width = (uint8_t) value; + return ret; + + default: + goto invalid_argument; + } + +invalid_argument: + i2ctool_printf(i2ctool, g_i2carginvalid, ptr); + return ERROR; + +out_of_range: + i2ctool_printf(i2ctool, g_i2cargrange, ptr); + return ERROR; +} + +/**************************************************************************** + * Name: arg_string + ****************************************************************************/ + +int arg_string(FAR char **arg, FAR char **value) +{ + FAR char *ptr = *arg; + + if (ptr[2] == '\0') + { + *value = arg[1]; + return 2; + } + else + { + *value = &ptr[2]; + return 1; + } +} + +/**************************************************************************** + * Name: arg_decimal + ****************************************************************************/ + +int arg_decimal(FAR char **arg, FAR long *value) +{ + FAR char *string; + int ret; + + ret = arg_string(arg, &string); + *value = strtol(string, NULL, 10); + return ret; +} + +/**************************************************************************** + * Name: arg_hex + ****************************************************************************/ + +int arg_hex(FAR char **arg, FAR long *value) +{ + FAR char *string; + int ret; + + ret = arg_string(arg, &string); + *value = strtol(string, NULL, 16); + return ret; +} |