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examples/gpio.c Added support for mmap access to gpio

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Signed-off-by: Michael Ring <mail@michael-ring.org>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Michael Ring
2015-02-14 17:26:06 +01:00
committed by Brendan Le Foll
parent a4431e7a3e
commit 244879697f
1 changed files with 20 additions and 6 deletions
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26
examples/gpio.c
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@@ -42,7 +42,9 @@ 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");
}
@@ -78,10 +80,15 @@ list_pins() {
}
mraa_result_t
gpio_set(int pin, int level) {
gpio_set(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_OUT);
if (raw != 0) {
if (mraa_gpio_use_mmaped(gpio, 1) != MRAA_SUCCESS) {
fprintf(stdout, "mmapped access to gpio not supported, falling back to normal mode\n", pin);
}
}
mraa_gpio_write(gpio, level);
return MRAA_SUCCESS;
}
@@ -89,10 +96,15 @@ gpio_set(int pin, int level) {
}
mraa_result_t
gpio_get(int pin, int* level) {
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 not supported, falling back to normal mode\n", pin);
}
}
*level = mraa_gpio_read(gpio);
return MRAA_SUCCESS;
}
@@ -143,19 +155,21 @@ main(int argc, char **argv)
print_help();
} else if (strcmp(argv[1], "version") == 0) {
print_version();
} else if (strcmp(argv[1], "set") == 0) {
} else if ((strcmp(argv[1], "set") == 0) || (strcmp(argv[1], "setraw") == 0)) {
if (argc == 4) {
int pin = atoi(argv[2]);
if (gpio_set(pin, atoi(argv[3])) != MRAA_SUCCESS)
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) {
} else if ((strcmp(argv[1], "get") == 0) || (strcmp(argv[1], "getraw") == 0)) {
if (argc == 3) {
int pin = atoi(argv[2]);
int level;
if (gpio_get(pin, &level) == MRAA_SUCCESS) {
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 {