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/*
* Author: Brendan Le Foll <brendan.le.foll@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/gpio.h"
struct gpio_source {
int pin;
mraa_gpio_context context;
};
void
print_version()
{
fprintf(stdout, "Version %s on %s\n", mraa_get_version(), mraa_get_platform_name());
}
void
print_help()
{
fprintf(stdout, "list List pins\n");
fprintf(stdout, "set pin level Set pin to level (0/1)\n");
fprintf(stdout, "setraw pin level Set pin to level (0/1) via mmap (if available)\n");
fprintf(stdout, "get pin Get pin level\n");
fprintf(stdout, "getraw pin Get pin level via mmap (if available)\n");
fprintf(stdout, "monitor pin Monitor pin level changes\n");
fprintf(stdout, "version Get mraa version and board name\n");
}
void
print_command_error()
{
fprintf(stdout, "Invalid command, options are:\n");
print_help();
}
int
list_platform_pins(uint8_t platform_offset)
{
int pin_count = mraa_get_platform_pin_count(platform_offset);
int i;
for (i = 0; i < pin_count; ++i) {
int pin_id = platform_offset > 0 ? mraa_get_sub_platform_id(i) : i;
char* pin_name = mraa_get_pin_name(pin_id);
if (strcmp(pin_name, "INVALID") != 0 && mraa_pin_mode_test(pin_id, MRAA_PIN_VALID)) {
fprintf(stdout, "%02d ", pin_id);
fprintf(stdout, "%*s: ", (MRAA_PIN_NAME_SIZE - 1), pin_name);
if (mraa_pin_mode_test(pin_id, MRAA_PIN_GPIO))
fprintf(stdout, "GPIO ");
if (mraa_pin_mode_test(pin_id, MRAA_PIN_I2C))
fprintf(stdout, "I2C ");
if (mraa_pin_mode_test(pin_id, MRAA_PIN_SPI))
fprintf(stdout, "SPI ");
if (mraa_pin_mode_test(pin_id, MRAA_PIN_PWM))
fprintf(stdout, "PWM ");
if (mraa_pin_mode_test(pin_id, MRAA_PIN_AIO))
fprintf(stdout, "AIO ");
if (mraa_pin_mode_test(pin_id, MRAA_PIN_UART))
fprintf(stdout, "UART ");
fprintf(stdout, "\n");
}
}
return pin_count;
}
int
list_pins()
{
int pin_count = 0;
pin_count += list_platform_pins(MRAA_MAIN_PLATFORM_OFFSET);
pin_count += list_platform_pins(MRAA_SUB_PLATFORM_OFFSET);
if (pin_count == 0) {
fprintf(stdout, "No Pins\n");
}
return pin_count;
}
mraa_result_t
gpio_set(int pin, int level, mraa_boolean_t raw)
{
mraa_gpio_context gpio;
if (raw) {
gpio = mraa_gpio_init_raw(pin);
}
else {
gpio = mraa_gpio_init(pin);
}
if (gpio != NULL) {
mraa_gpio_dir(gpio, MRAA_GPIO_OUT);
if (raw != 0) {
if (mraa_gpio_use_mmaped(gpio, 1) != MRAA_SUCCESS) {
fprintf(stdout,
"mmapped access to gpio %d not supported, falling back to normal mode\n", pin);
}
}
mraa_gpio_write(gpio, level);
return MRAA_SUCCESS;
}
return MRAA_ERROR_INVALID_RESOURCE;
}
mraa_result_t
gpio_get(int pin, int* level, mraa_boolean_t raw)
{
mraa_gpio_context gpio = mraa_gpio_init(pin);
if (gpio != NULL) {
mraa_gpio_dir(gpio, MRAA_GPIO_IN);
if (raw != 0) {
if (mraa_gpio_use_mmaped(gpio, 1) != MRAA_SUCCESS) {
fprintf(stdout,
"mmapped access to gpio %d not supported, falling back to normal mode\n", pin);
}
}
*level = mraa_gpio_read(gpio);
return MRAA_SUCCESS;
}
return MRAA_ERROR_INVALID_RESOURCE;
}
void
gpio_isr_handler(void* args)
{
struct gpio_source* gpio_info = (struct gpio_source*) args;
int level = mraa_gpio_read(gpio_info->context);
fprintf(stdout, "Pin %d = %d\n", gpio_info->pin, level);
}
mraa_result_t
gpio_isr_start(struct gpio_source* gpio_info)
{
gpio_info->context = mraa_gpio_init(gpio_info->pin);
if (gpio_info->context != NULL) {
mraa_result_t status = mraa_gpio_dir(gpio_info->context, MRAA_GPIO_IN);
if (status == MRAA_SUCCESS) {
status = mraa_gpio_isr(gpio_info->context, MRAA_GPIO_EDGE_BOTH, &gpio_isr_handler, gpio_info);
}
return status;
} else {
return MRAA_ERROR_INVALID_RESOURCE;
}
}
mraa_result_t
gpio_isr_stop(struct gpio_source* gpio_info)
{
mraa_gpio_isr_exit(gpio_info->context);
mraa_gpio_close(gpio_info->context);
return MRAA_SUCCESS;
}
int
main(int argc, char** argv)
{
if (argc == 1) {
print_command_error();
}
if (argc > 1) {
if (strcmp(argv[1], "list") == 0) {
list_pins();
} else if (strcmp(argv[1], "help") == 0) {
print_help();
} else if (strcmp(argv[1], "version") == 0) {
print_version();
} else if ((strcmp(argv[1], "set") == 0) || (strcmp(argv[1], "setraw") == 0)) {
if (argc == 4) {
int pin = atoi(argv[2]);
mraa_boolean_t rawmode = strcmp(argv[1], "setraw") == 0;
if (gpio_set(pin, atoi(argv[3]), rawmode) != MRAA_SUCCESS)
fprintf(stdout, "Could not initialize gpio %d\n", pin);
} else {
print_command_error();
}
} else if ((strcmp(argv[1], "get") == 0) || (strcmp(argv[1], "getraw") == 0)) {
if (argc == 3) {
int pin = atoi(argv[2]);
int level;
mraa_boolean_t rawmode = strcmp(argv[1], "getraw") == 0;
if (gpio_get(pin, &level, rawmode) == MRAA_SUCCESS) {
fprintf(stdout, "Pin %d = %d\n", pin, level);
} else {
fprintf(stdout, "Could not initialize gpio %d\n", pin);
}
} else {
print_command_error();
}
} else if (strcmp(argv[1], "monitor") == 0) {
if (argc == 3) {
int pin = atoi(argv[2]);
struct gpio_source gpio_info;
gpio_info.pin = pin;
if (gpio_isr_start(&gpio_info) == MRAA_SUCCESS) {
fprintf(stdout, "Monitoring level changes to pin %d. Press RETURN to exit.\n", pin);
gpio_isr_handler(&gpio_info);
char aux = 0;
do {
fflush(stdin);
fscanf(stdin, "%c", &aux);
} while (aux != '\n');
gpio_isr_stop(&gpio_info);
} else {
fprintf(stdout, "Failed to register ISR for pin %d\n", pin);
}
} else {
print_command_error();
}
} else {
print_command_error();
}
}
return 0;
}
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