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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2011-08-30 15:07:21 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2011-08-30 15:07:21 +0000 |
commit | 6da7839685a296ef4324847306de9be7b0e6722b (patch) | |
tree | 9f94cee3c1c7c9f9af0bde818facefddbe3df440 /apps/system/i2c/i2c_dev.c | |
parent | 226c8f246cfc548246c021393aab56b0a8be7968 (diff) | |
download | nuttx-6da7839685a296ef4324847306de9be7b0e6722b.tar.gz nuttx-6da7839685a296ef4324847306de9be7b0e6722b.tar.bz2 nuttx-6da7839685a296ef4324847306de9be7b0e6722b.zip |
First cut at I2C tool
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3927 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'apps/system/i2c/i2c_dev.c')
-rw-r--r-- | apps/system/i2c/i2c_dev.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/apps/system/i2c/i2c_dev.c b/apps/system/i2c/i2c_dev.c index 2458aec18..a8340f0d8 100644 --- a/apps/system/i2c/i2c_dev.c +++ b/apps/system/i2c/i2c_dev.c @@ -39,6 +39,10 @@ #include <nuttx/config.h> +#include <stdlib.h> + +#include <nuttx/i2c.h> + #include "i2ctool.h" /**************************************************************************** @@ -75,5 +79,156 @@ int cmd_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[2].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"); + } + + (void)up_i2cuninitialize(dev); return OK; } |