diff options
Diffstat (limited to 'commandline/i2cset.c')
| -rw-r--r-- | commandline/i2cset.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/commandline/i2cset.c b/commandline/i2cset.c index 3edaf81..5b2662c 100644 --- a/commandline/i2cset.c +++ b/commandline/i2cset.c @@ -6,7 +6,7 @@ int main(int argc, char **argv) { - int i, address, cmdbuf, got_ack; + int i, address, cmdbuf; char *conv_err; i2c_getopt(argc, argv); @@ -21,23 +21,29 @@ int main(int argc, char **argv) address = strtol(argv[1], &conv_err, 0); if (conv_err && *conv_err) { - fprintf(stderr, "Conversion error at '%s'", conv_err); + fprintf(stderr, "Conversion error at '%s'\n", conv_err); return 2; } - got_ack = i2c_tx_byte(address << 1); + if (!i2c_tx_byte(address << 1)) { + fprintf(stderr, "Received NAK from slave 0x%02x, aborting\n", address); + return 3; + } for (i = 2; i < argc; i++) { cmdbuf = strtol(argv[i], &conv_err, 0); if (conv_err && *conv_err) { - fprintf(stderr, "write command: conversion error at '%s'", conv_err); + fprintf(stderr, "write command: conversion error at '%s'\n", conv_err); return 2; } - i2c_tx_byte(cmdbuf); + if (!i2c_tx_byte(cmdbuf)) { + fprintf(stderr, "Received NAK after byte %d (0x%02x)\n", i-1, cmdbuf); + return 4; + } } i2c_stop(); i2c_deinit(); - return got_ack ? 0 : 1; + return 0; } |