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/*
* Author: Henry Bruce <henry.bruce@intel.com>
* Copyright (c) 2014 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "mraa/i2c.h"
#include "mraa_internal_types.h"
extern mraa_board_t* plat;
void
print_version()
{
fprintf(stdout, "Version %s on %s", mraa_get_version(), mraa_get_platform_name());
if (plat != NULL && plat->sub_platform != NULL)
fprintf(stdout, " with %s", plat->sub_platform->platform_name);
fprintf(stdout, "\n");
}
void
print_help()
{
fprintf(stdout, "version Get mraa version and board name\n");
fprintf(stdout, "list List available busses\n");
fprintf(stdout, "detect bus List detected devices on specified bus\n");
fprintf(stdout, "get bus device reg Get value from specified device register\n");
fprintf(stdout, "set bus device reg value Set specified device register to value\n");
}
void
print_command_error()
{
fprintf(stdout, "Invalid command, options are:\n");
print_help();
}
void
print_bus(mraa_board_t* board)
{
int i, bus;
for (i = 0; i < board->i2c_bus_count; ++i) {
char* busType;
switch (board->platform_type) {
case MRAA_INTEL_GALILEO_GEN1:
case MRAA_INTEL_GALILEO_GEN2:
case MRAA_INTEL_EDISON_FAB_C:
case MRAA_INTEL_DE3815:
case MRAA_INTEL_MINNOWBOARD_MAX:
case MRAA_RASPBERRY_PI:
case MRAA_BEAGLEBONE:
case MRAA_BANANA:
case MRAA_UP:
bus = i;
busType = "linux";
break;
case MRAA_FTDI_FT4222:
busType = "ft4222";
bus = mraa_get_sub_platform_id(i);
break;
default:
busType = "unknown";
break;
}
int id = board->i2c_bus[i].bus_id;
fprintf(stdout, "Bus %3d: id=%02d type=%s ", bus, id, busType);
if (i == board->def_i2c_bus)
fprintf(stdout, " default");
if (id == -1)
fprintf(stdout, " disabled");
fprintf(stdout, "\n");
}
}
void
print_busses()
{
print_bus(plat);
if (mraa_has_sub_platform())
print_bus(plat->sub_platform);
}
mraa_result_t
i2c_get(int bus, uint8_t device_address, uint8_t register_address, uint8_t* data)
{
mraa_result_t status = MRAA_SUCCESS;
mraa_i2c_context i2c = mraa_i2c_init(bus);
if (i2c == NULL) {
return MRAA_ERROR_NO_RESOURCES;
}
status = mraa_i2c_address(i2c, device_address);
if (status != MRAA_SUCCESS) {
goto i2c_get_exit;
}
status = mraa_i2c_write_byte(i2c, register_address);
if (status != MRAA_SUCCESS) {
goto i2c_get_exit;
}
status = mraa_i2c_read(i2c, data, 1) == 1 ? MRAA_SUCCESS : MRAA_ERROR_UNSPECIFIED;
if (status != MRAA_SUCCESS) {
goto i2c_get_exit;
}
i2c_get_exit:
mraa_i2c_stop(i2c);
return status;
}
mraa_result_t
i2c_set(int bus, uint8_t device_address, uint8_t register_address, uint8_t data)
{
mraa_result_t status = MRAA_SUCCESS;
mraa_i2c_context i2c = mraa_i2c_init(bus);
if (i2c == NULL) {
return MRAA_ERROR_NO_RESOURCES;
}
status = mraa_i2c_address(i2c, device_address);
if (status != MRAA_SUCCESS) {
fprintf(stderr, "Could not set i2c device address\n");
goto i2c_set_exit;
}
status = mraa_i2c_write_byte_data(i2c, data, register_address);
if (status != MRAA_SUCCESS) {
fprintf(stderr, "Could not write to i2c register. Status = %d\n", status);
goto i2c_set_exit;
}
i2c_set_exit:
mraa_i2c_stop(i2c);
return status;
}
void
i2c_detect_devices(int bus)
{
mraa_result_t status = MRAA_SUCCESS;
mraa_i2c_context i2c = mraa_i2c_init(bus);
if (i2c == NULL) {
return;
}
int addr;
for (addr = 0x0; addr < 0x80; ++addr) {
uint8_t value;
if ((addr) % 16 == 0)
printf("%02x: ", addr);
if (i2c_get(bus, addr, 0, &value) == MRAA_SUCCESS)
printf("%02x ", addr);
else
printf("-- ");
if ((addr + 1) % 16 == 0)
printf("\n");
}
}
int
process_command(int argc, char** argv)
{
int status = 0;
if (strcmp(argv[1], "help") == 0) {
print_help();
return 0;
} else if (strcmp(argv[1], "version") == 0) {
print_version();
return 0;
} else if (strcmp(argv[1], "list") == 0) {
print_busses();
return 0;
} else if (strcmp(argv[1], "detect") == 0) {
if (argc == 3) {
int bus = strtol(argv[2], NULL, 0);
i2c_detect_devices(bus);
return 0;
} else {
print_command_error();
return 1;
}
} else if ((strcmp(argv[1], "get") == 0) || (strcmp(argv[1], "getrpt") == 0)) {
if (argc == 5) {
int interation = 0;
mraa_boolean_t should_repeat = strcmp(argv[1], "getrpt") == 0;
int bus = strtol(argv[2], NULL, 0);
uint8_t device_address = strtol(argv[3], NULL, 0);
uint8_t register_address = strtol(argv[4], NULL, 0);
// fprintf(stdout, "Device %02X, Register = %02X\n", device_address, register_address);
uint8_t data;
do {
if (i2c_get(bus, device_address, register_address, &data) == MRAA_SUCCESS) {
if (should_repeat)
fprintf(stdout, "%4d: ", interation);
fprintf(stdout, "Register %#02X = %#02X\n", register_address, data);
status = 0;
} else {
fprintf(stdout, "i2c get failed\n");
status = 1;
}
interation++;
usleep(10000);
} while (should_repeat && status == 0);
} else {
print_command_error();
status = 1;
}
return status;
} else if ((strcmp(argv[1], "set") == 0)) {
if (argc == 6) {
int bus = strtol(argv[2], NULL, 0);
uint8_t device_address = strtol(argv[3], NULL, 0);
uint8_t register_address = strtol(argv[4], NULL, 0);
uint8_t value = strtol(argv[5], NULL, 0);
fprintf(stdout, "Device %02X, Register = %02X, Value = %02X\n", device_address,
register_address, value);
if (i2c_set(bus, device_address, register_address, value) != MRAA_SUCCESS) {
fprintf(stdout, "i2c set failed\n");
return 0;
}
return 1;
} else {
print_command_error();
return 1;
}
} else {
print_command_error();
return 1;
}
}
void
run_interactive_mode()
{
char command[80];
while (1) {
int i, argc = 1;
char* argv[32];
char* arg;
argv[0] = "mraa-i2c";
fprintf(stdout, "Command: ");
fgets(command, 80, stdin);
command[strlen(command) - 1] = 0;
if (strcmp(command, "q") == 0)
return;
char* str = strtok(command, " ");
while (str != NULL) {
arg = malloc(strlen(str) + 1);
argv[argc++] = strcpy(arg, str);
str = strtok(NULL, " ");
}
process_command(argc, argv);
for (i = 1; i < argc; ++i)
free(argv[i]);
}
}
int
main(int argc, char** argv)
{
mraa_set_log_level(7);
if (argc == 1) {
run_interactive_mode();
return 0;
} else
return process_command(argc, argv);
}
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