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#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "i2c-util.h"
int main(int argc, char **argv)
{
int i, address, cmdbuf;
int num_bytes = 1;
unsigned int ret;
char *conv_err;
i2c_getopt(argc, argv);
if (argc < 4) {
fputs("Usage: vusb-i2cget <address> <num_bytes> <register ...> ", stderr);
return 1;
}
address = strtol(argv[1], &conv_err, 0);
if (conv_err && *conv_err) {
fprintf(stderr, "address: Conversion error at '%s'\n", conv_err);
return 2;
}
num_bytes = strtol(argv[2], &conv_err, 0);
if (conv_err && *conv_err) {
fprintf(stderr, "num_bytes: Conversion error at '%s'\n", conv_err);
return 2;
}
i2c_init();
i2c_hw_start();
if (!i2c_hw_tx_byte((address << 1) | 0)) {
fprintf(stderr, "Received NAK from slave 0x%02x, aborting\n", address);
i2c_hw_stop();
i2c_deinit();
return 3;
}
for (i = 3; i < argc; i++) {
cmdbuf = strtol(argv[i], &conv_err, 0);
if (conv_err && *conv_err) {
fprintf(stderr, "read command: Conversion error at '%s'\n", conv_err);
i2c_hw_stop();
i2c_deinit();
return 2;
}
if (!i2c_hw_tx_byte(cmdbuf)) {
fprintf(stderr, "Received NAK after byte %d (0x%02x)\n", i-1, cmdbuf);
i2c_hw_stop();
i2c_deinit();
return 4;
}
}
i2c_hw_start();
if (!i2c_hw_tx_byte((address << 1) | 1)) {
fprintf(stderr, "Received NAK after reSTART from slave 0x%02x, aborting\n", address);
i2c_hw_stop();
i2c_deinit();
return 3;
}
for (i = 0; i < num_bytes; i++) {
printf("%i\n", i2c_hw_rx_byte(1));
}
i2c_hw_stop();
i2c_deinit();
return 0;
}
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