diff options
Diffstat (limited to 'apps/system/i2c/i2c_set.c')
| -rw-r--r-- | apps/system/i2c/i2c_set.c | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/apps/system/i2c/i2c_set.c b/apps/system/i2c/i2c_set.c new file mode 100644 index 000000000..66fd8c85a --- /dev/null +++ b/apps/system/i2c/i2c_set.c @@ -0,0 +1,275 @@ +/**************************************************************************** + * apps/system/i2c/i2c_set.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_set + ****************************************************************************/ + +int i2ccmd_set(FAR struct i2ctool_s *i2ctool, int argc, FAR char **argv) +{ + FAR struct i2c_dev_s *dev; + FAR char *ptr; + uint8_t regaddr; + long value; + long repititions; + int nargs; + int argndx; + int ret; + int i; + + /* 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 must be at least one more thing on the command line: The value + * to be written. + */ + + if (argndx < argc) + { + value = strtol(argv[argndx], NULL, 16); + if (i2ctool->width == 8) + { + if (value < 0 || value > 255) + { + i2ctool_printf(i2ctool, g_i2cargrange, argv[0]); + return ERROR; + } + } + else if (value < 0 || value > 65535) + { + i2ctool_printf(i2ctool, g_i2cargrange, argv[0]); + return ERROR; + } + + argndx++; + } + else + { + i2ctool_printf(i2ctool, g_i2cargrequired, argv[0]); + return ERROR; + } + + /* There may be one more thing on the command line: The repitition + * count. + */ + + repititions = 1; + if (argndx < argc) + { + repititions = strtol(argv[argndx], NULL, 16); + if (repititions < 1) + { + i2ctool_printf(i2ctool, g_i2cargrange, argv[0]); + return ERROR; + } + + argndx++; + } + + 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 the address (NOTE: Only 7-bit address supported now) */ + + I2C_SETFREQUENCY(dev, i2ctool->freq); + I2C_SETADDRESS(dev, i2ctool->addr, 7); + + /* Loop for the requested number of repititions */ + + regaddr = i2ctool->regaddr; + ret = OK; + + for (i = 0; i < repititions; i++) + { + /* Write to the I2C bus */ + + ret = i2ctool_set(i2ctool, dev, regaddr, (uint16_t)value); + + /* Display the result */ + + if (ret == OK) + { + i2ctool_printf(i2ctool, "WROTE Bus: %d Addr: %02x Subaddr: %02x Value: ", + i2ctool->bus, i2ctool->addr, i2ctool->regaddr); + if (i2ctool->width == 8) + { + i2ctool_printf(i2ctool, "%02x\n", (int)value); + } + else + { + i2ctool_printf(i2ctool, "%04x\n", (int)value); + } + } + else + { + i2ctool_printf(i2ctool, g_i2cxfrerror, argv[0], -ret); + break; + } + + /* Auto-increment the address if so configured */ + + if (i2ctool->autoincr) + { + regaddr++; + } + } + + (void)up_i2cuninitialize(dev); + return ret; +} + +/**************************************************************************** + * Name: i2ctool_set + ****************************************************************************/ + +int i2ctool_set(FAR struct i2ctool_s *i2ctool, FAR struct i2c_dev_s *dev, + uint8_t regaddr, uint16_t value) +{ + struct i2c_msg_s msg[2]; + union + { + uint16_t data16; + uint8_t data8; + } u; + int ret; + + /* Set up data structures */ + + msg[0].addr = i2ctool->addr; + msg[0].flags = 0; + msg[0].buffer = ®addr; + msg[0].length = 1; + + msg[1].addr = i2ctool->addr; + msg[1].flags = 0; + if (i2ctool->width == 8) + { + u.data8 = (uint8_t)value; + msg[1].buffer = &u.data8; + msg[1].length = 1; + } + else + { + u.data16 = value; + 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); + } + + return ret; +} |