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Diffstat (limited to 'apps/system/i2c/i2c_dev.c')
| -rw-r--r-- | apps/system/i2c/i2c_dev.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/apps/system/i2c/i2c_dev.c b/apps/system/i2c/i2c_dev.c new file mode 100644 index 000000000..f2b5a0e21 --- /dev/null +++ b/apps/system/i2c/i2c_dev.c @@ -0,0 +1,235 @@ +/**************************************************************************** + * apps/system/i2c/i2c_dev.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 <nuttx/i2c.h> + +#include "i2ctool.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: i2ccmd_dev + ****************************************************************************/ + +int i2ccmd_dev(FAR struct i2ctool_s *i2ctool, int argc, char **argv) +{ + FAR struct i2c_dev_s *dev; + struct i2c_msg_s msg[2]; + FAR char *ptr; + union + { + uint16_t data16; + uint8_t data8; + } u; + + uint8_t regaddr; + long first; + long last; + int addr; + int nargs; + int argndx; + int ret; + int i; + int j; + + /* Parse any command line arguments */ + + for (argndx = 1; argndx < argc; ) + { + /* Break out of the look when the last option has been parsed */ + + ptr = argv[argndx]; + if (*ptr != '-') + { + break; + } + + /* Otherwise, check for common options */ + + nargs = common_args(i2ctool, &argv[argndx]); + if (nargs < 0) + { + return ERROR; + } + argndx += nargs; + } + + /* There should be exactly two more things on the command line: The first and + * last addresses to be probed. + */ + + if (argndx+1 < argc) + { + first = strtol(argv[argndx], NULL, 16); + last = strtol(argv[argndx+1], NULL, 16); + if (first < 0 || first > 0x7f || last < 0 || last > 0x7f || first > last) + { + i2ctool_printf(i2ctool, g_i2cargrange, argv[0]); + return ERROR; + } + + argndx += 2; + } + else + { + i2ctool_printf(i2ctool, g_i2cargrequired, argv[0]); + return ERROR; + } + + if (argndx != argc) + { + i2ctool_printf(i2ctool, g_i2ctoomanyargs, argv[0]); + return ERROR; + } + + /* Get a handle to the I2C bus */ + + dev = up_i2cinitialize(i2ctool->bus); + if (!dev) + { + i2ctool_printf(i2ctool, "Failed to get bus %d\n", i2ctool->bus); + return ERROR; + } + + /* Set the frequency and address (NOTE: Only 7-bit address supported now) */ + + I2C_SETFREQUENCY(dev, i2ctool->freq); + + /* Probe each address */ + + i2ctool_printf(i2ctool, " 0 1 2 3 4 5 6 7 8 9 a b c d e f\n"); + for (i = 0; i < 128; i += 16) + { + i2ctool_printf(i2ctool, "%02x: ", i); + for (j = 0; j < 16; j++) + { + /* Skip addresses that are out of the selected range */ + + addr = i+j; + if (addr < first || addr > last) + { + i2ctool_printf(i2ctool, " "); + continue; + } + + /* Set the I2C address */ + + I2C_SETADDRESS(dev, addr, 7); + + /* Set up data structures */ + + regaddr = 0; + + msg[0].addr = addr; + msg[0].flags = 0; + msg[0].buffer = ®addr; + msg[0].length = 1; + + msg[1].addr = addr; + msg[1].flags = I2C_M_READ; + if (i2ctool->width == 8) + { + msg[1].buffer = &u.data8; + msg[1].length = 1; + } + else + { + msg[1].buffer = (uint8_t*)&u.data16; + msg[1].length = 2; + } + + if (i2ctool->start) + { + ret = I2C_TRANSFER(dev, &msg[0], 1); + if (ret == OK) + { + ret = I2C_TRANSFER(dev, &msg[1], 1); + } + } + else + { + ret = I2C_TRANSFER(dev, msg, 2); + } + + if (ret == OK) + { + i2ctool_printf(i2ctool, "%02x ", addr); + } + else + { + i2ctool_printf(i2ctool, "-- "); + } + } + i2ctool_printf(i2ctool, "\n"); + i2ctool_flush(i2ctool); + } + + (void)up_i2cuninitialize(dev); + return OK; +} |