* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
+#define _GNU_SOURCE
+#if !defined(_XOPEN_SOURCE) || _XOPEN_SOURCE < 600
+#define _XOPEN_SOURCE 600 /* Get nftw() and S_IFSOCK declarations */
+#endif
+
#include <stddef.h>
#include <stdlib.h>
#include <sched.h>
#include <string.h>
#include <pwd.h>
+#include <glob.h>
+#include <ftw.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdio.h>
#include "mraa_internal.h"
#include "gpio.h"
#include "version.h"
+#define MAX_PLATFORM_NAME_LENGTH 128
+#define IIO_DEVICE_WILDCARD "iio:device*"
mraa_board_t* plat = NULL;
-static mraa_platform_t platform_type = MRAA_UNKNOWN_PLATFORM;
-mraa_adv_func_t* advance_func;
+mraa_iio_info_t* plat_iio = NULL;
+
+static char platform_name[MAX_PLATFORM_NAME_LENGTH];
-const char *
+static int num_i2c_devices = 0;
+static int num_iio_devices = 0;
+
+const char*
mraa_get_version()
{
return gVERSION;
{
if (level <= 7 && level >= 0) {
setlogmask(LOG_UPTO(level));
+ syslog(LOG_DEBUG, "Loglevel %d is set", level);
return MRAA_SUCCESS;
}
+ syslog(LOG_NOTICE, "Invalid loglevel %d requested", level);
return MRAA_ERROR_INVALID_PARAMETER;
}
+
+#if (defined SWIGPYTHON) || (defined SWIG)
+mraa_result_t
+#else
mraa_result_t __attribute__((constructor))
+#endif
mraa_init()
{
if (plat != NULL) {
}
uid_t proc_euid = geteuid();
- struct passwd *proc_user = getpwuid(proc_euid);
+ struct passwd* proc_user = getpwuid(proc_euid);
#ifdef DEBUG
setlogmask(LOG_UPTO(LOG_DEBUG));
#endif
openlog("libmraa", LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
- syslog(LOG_DEBUG,
- "libmraa initialised by user '%s' with EUID %d",
- (proc_user != NULL) ? proc_user->pw_name : "<unknown>",
- proc_euid);
-
- if (proc_euid != 0) {
- char *err_msg = "mraa: FATAL error, "
- "libmraa program must be run as root (EUID 0), "
- "cannot proceed\n";
- syslog(LOG_ERR, "%s", err_msg);
- fprintf(stderr, "%s", err_msg);
- return MRAA_ERROR_PLATFORM_NOT_INITIALISED;
- }
+ syslog(LOG_NOTICE, "libmraa version %s initialised by user '%s' with EUID %d",
+ mraa_get_version(), (proc_user != NULL) ? proc_user->pw_name : "<unknown>", proc_euid);
#ifdef SWIGPYTHON
// Initialise python threads, this allows use to grab the GIL when we are
Py_InitializeEx(0);
PyEval_InitThreads();
#endif
- advance_func = (mraa_adv_func_t*) malloc(sizeof(mraa_adv_func_t));
- memset(advance_func, 0, sizeof(mraa_adv_func_t));
-#ifdef X86PLAT
+ mraa_platform_t platform_type;
+#if defined(X86PLAT)
// Use runtime x86 platform detection
platform_type = mraa_x86_platform();
-#elif ARMPLAT
+#elif defined(ARMPLAT)
// Use runtime ARM platform detection
platform_type = mraa_arm_platform();
#else
- #error mraa_ARCH NOTHING
+#error mraa_ARCH NOTHING
#endif
+ if (plat != NULL)
+ plat->platform_type = platform_type;
+
+#if defined(USBPLAT)
+ // This is a platform extender so create null base platform if one doesn't already exist
+ if (plat == NULL) {
+ plat = (mraa_board_t*) calloc(1, sizeof(mraa_board_t));
+ if (plat != NULL) {
+ plat->platform_type = MRAA_NULL_PLATFORM;
+ plat->platform_name = "Unknown platform";
+ }
+ }
+ // Now detect sub platform
+ if (plat != NULL) {
+ mraa_platform_t usb_platform_type = mraa_usb_platform_extender(plat);
+ if (plat->platform_type == MRAA_UNKNOWN_PLATFORM && usb_platform_type != MRAA_UNKNOWN_PLATFORM) {
+ plat->platform_type = usb_platform_type;
+ } else {
+ return MRAA_ERROR_PLATFORM_NOT_INITIALISED;
+ }
+ }
if (plat == NULL) {
printf("mraa: FATAL error, failed to initialise platform\n");
return MRAA_ERROR_PLATFORM_NOT_INITIALISED;
}
+#endif
+
+ // Look for IIO devices
+ mraa_iio_detect();
- syslog(LOG_INFO,
- "libmraa initialised for platform '%s' of type %d",
- mraa_get_platform_name(),
- platform_type);
+ syslog(LOG_NOTICE, "libmraa initialised for platform '%s' of type %d", mraa_get_platform_name(), mraa_get_platform_type());
return MRAA_SUCCESS;
}
if (plat->pins != NULL) {
free(plat->pins);
}
+ mraa_board_t* sub_plat = plat->sub_platform;
+ if (sub_plat != NULL) {
+ if (sub_plat->pins != NULL) {
+ free(sub_plat->pins);
+ }
+ free(sub_plat);
+ }
free(plat);
+
+ }
+ if (plat_iio != NULL) {
+ free(plat_iio);
}
closelog();
}
memset(&sched_s, 0, sizeof(struct sched_param));
if (priority > sched_get_priority_max(SCHED_RR)) {
sched_s.sched_priority = sched_get_priority_max(SCHED_RR);
- }
- else {
+ } else {
sched_s.sched_priority = priority;
}
return sched_setscheduler(0, SCHED_RR, &sched_s);
}
+static int
+mraa_count_iio_devices(const char* path, const struct stat* sb, int flag, struct FTW* ftwb)
+{
+ // we are only interested in files with specific names
+ if (fnmatch(IIO_DEVICE_WILDCARD, basename(path), 0) == 0) {
+ num_iio_devices++;
+ }
+ return 0;
+}
+
+mraa_result_t
+mraa_iio_detect()
+{
+ plat_iio = (mraa_iio_info_t*) calloc(1, sizeof(mraa_iio_info_t));
+ plat_iio->iio_device_count = num_iio_devices;
+ // Now detect IIO devices, linux only
+ // find how many iio devices we have if we haven't already
+ if (num_iio_devices == 0) {
+ if (nftw("/sys/bus/iio/devices", &mraa_count_iio_devices, 20, FTW_PHYS) == -1) {
+ return MRAA_ERROR_UNSPECIFIED;
+ }
+ }
+ char name[64], filepath[64];
+ int fd, len, i;
+ plat_iio->iio_device_count = num_iio_devices;
+ plat_iio->iio_devices = calloc(num_iio_devices, sizeof(struct _iio));
+ struct _iio* device;
+ for (i=0; i < num_iio_devices; i++) {
+ device = &plat_iio->iio_devices[i];
+ device->num = i;
+ snprintf(filepath, 64, "/sys/bus/iio/devices/iio:device%d/name", i);
+ fd = open(filepath, O_RDONLY);
+ if (fd != -1) {
+ len = read(fd, &name, 64);
+ if (len > 1) {
+ // remove any trailing CR/LF symbols
+ name[strcspn(name, "\r\n")] = '\0';
+ len = strlen(name);
+ // use strndup
+ device->name = malloc((sizeof(char) * len) + sizeof(char));
+ strncpy(device->name, name, len+1);
+ }
+ close(fd);
+ }
+ }
+ return MRAA_SUCCESS;
+}
+
+
mraa_result_t
mraa_setup_mux_mapped(mraa_pin_t meta)
{
// this function will sometimes fail, however this is not critical as
// long as the write succeeds - Test case galileo gen2 pin2
mraa_gpio_dir(mux_i, MRAA_GPIO_OUT);
+ mraa_gpio_owner(mux_i, 0);
if (mraa_gpio_write(mux_i, meta.mux[mi].value) != MRAA_SUCCESS) {
mraa_gpio_close(mux_i);
}
}
+
+mraa_boolean_t
+mraa_has_sub_platform()
+{
+ return (plat != NULL) && (plat->sub_platform != NULL);
+}
+
mraa_boolean_t
mraa_pin_mode_test(int pin, mraa_pinmodes_t mode)
{
- if (plat == NULL) {
- mraa_init();
- if (plat == NULL)
+ if (plat == NULL)
+ return 0;
+
+ mraa_board_t* current_plat = plat;
+ if (mraa_is_sub_platform_id(pin)) {
+ current_plat = plat->sub_platform;
+ if (current_plat == NULL) {
+ syslog(LOG_ERR, "mraa_pin_mode_test: Sub platform Not Initialised");
return 0;
+ }
+ pin = mraa_get_sub_platform_index(pin);
+ }
+
+ if (current_plat == NULL || current_plat->platform_type == MRAA_UNKNOWN_PLATFORM) {
+ return 0;
}
- if (pin > (plat->phy_pin_count -1) || pin < 0)
+ if (pin > (current_plat->phy_pin_count - 1) || pin < 0)
return 0;
- switch(mode) {
+ switch (mode) {
case MRAA_PIN_VALID:
- if (plat->pins[pin].capabilites.valid == 1)
+ if (current_plat->pins[pin].capabilites.valid == 1)
return 1;
break;
case MRAA_PIN_GPIO:
- if (plat->pins[pin].capabilites.gpio ==1)
+ if (current_plat->pins[pin].capabilites.gpio == 1)
return 1;
break;
case MRAA_PIN_PWM:
- if (plat->pins[pin].capabilites.pwm ==1)
+ if (current_plat->pins[pin].capabilites.pwm == 1)
return 1;
break;
case MRAA_PIN_FAST_GPIO:
- if (plat->pins[pin].capabilites.fast_gpio ==1)
+ if (current_plat->pins[pin].capabilites.fast_gpio == 1)
return 1;
break;
case MRAA_PIN_SPI:
- if (plat->pins[pin].capabilites.spi ==1)
+ if (current_plat->pins[pin].capabilites.spi == 1)
return 1;
break;
case MRAA_PIN_I2C:
- if (plat->pins[pin].capabilites.i2c ==1)
+ if (current_plat->pins[pin].capabilites.i2c == 1)
return 1;
break;
case MRAA_PIN_AIO:
- if (plat->pins[pin].capabilites.aio ==1)
+ if (current_plat->pins[pin].capabilites.aio == 1)
return 1;
break;
case MRAA_PIN_UART:
- if (plat->pins[pin].capabilites.uart == 1)
+ if (current_plat->pins[pin].capabilites.uart == 1)
return 1;
break;
default:
return 0;
}
-mraa_platform_t mraa_get_platform_type()
+mraa_platform_t
+mraa_get_platform_type()
{
- return platform_type;
+ if (plat == NULL)
+ return MRAA_UNKNOWN_PLATFORM;
+ return plat->platform_type;
+}
+
+int
+mraa_get_platform_combined_type()
+{
+ int type = mraa_get_platform_type();
+ int sub_type = mraa_has_sub_platform() ? plat->sub_platform->platform_type : MRAA_UNKNOWN_PLATFORM;
+ return type | (sub_type << 8);
}
unsigned int
}
unsigned int
+mraa_get_platform_adc_raw_bits(uint8_t platform_offset)
+{
+ if (platform_offset == MRAA_MAIN_PLATFORM_OFFSET)
+ return mraa_adc_raw_bits();
+ else {
+ if (!mraa_has_sub_platform())
+ return 0;
+
+ if (plat->sub_platform->aio_count == 0)
+ return 0;
+
+ return plat->sub_platform->adc_raw;
+ }
+}
+
+
+unsigned int
mraa_adc_supported_bits()
{
if (plat == NULL)
return plat->adc_supported;
}
+unsigned int
+mraa_get_platform_adc_supported_bits(int platform_offset)
+{
+ if (platform_offset == MRAA_MAIN_PLATFORM_OFFSET)
+ return mraa_adc_supported_bits();
+ else {
+ if (!mraa_has_sub_platform())
+ return 0;
+
+ if (plat->sub_platform->aio_count == 0)
+ return 0;
+
+ return plat->sub_platform->adc_supported;
+ }
+}
+
+
char*
mraa_get_platform_name()
{
+ if (plat == NULL) {
+ return NULL;
+ }
+ if (mraa_has_sub_platform()) {
+ snprintf(platform_name, MAX_PLATFORM_NAME_LENGTH, "%s + %s", plat->platform_name, plat->sub_platform->platform_name);
+ } else {
+ strncpy(platform_name, plat->platform_name, MAX_PLATFORM_NAME_LENGTH-1);
+ }
+
+ return platform_name;
+}
+
+int
+mraa_get_i2c_bus_count()
+{
+ if (plat == NULL) {
+ return -1;
+ }
+ return plat->i2c_bus_count;
+}
+
+int
+mraa_get_i2c_bus_id(unsigned i2c_bus)
+{
+ if (plat == NULL) {
+ return -1;
+ }
+
+ if (i2c_bus >= plat->i2c_bus_count) {
+ return -1;
+ }
+
+ return plat->i2c_bus[i2c_bus].bus_id;
+}
+
+unsigned int
+mraa_get_pin_count()
+{
+ if (plat == NULL) {
+ return 0;
+ }
+ return plat->phy_pin_count;
+}
+
+unsigned int
+mraa_get_platform_pin_count(uint8_t platform_offset)
+{
+ if (platform_offset == MRAA_MAIN_PLATFORM_OFFSET)
+ return mraa_get_pin_count();
+ else {
+ if (mraa_has_sub_platform())
+ return plat->sub_platform->phy_pin_count;
+ else
+ return 0;
+ }
+}
+
+
+char*
+mraa_get_pin_name(int pin)
+{
if (plat == NULL)
- return "Unknown";
- return plat->platform_name;
+ return 0;
+
+ mraa_board_t* current_plat = plat;
+ if (mraa_is_sub_platform_id(pin)) {
+ current_plat = plat->sub_platform;
+ if (current_plat == NULL) {
+ syslog(LOG_ERR, "mraa_get_pin_name: Sub platform Not Initialised");
+ return 0;
+ }
+ pin = mraa_get_sub_platform_index(pin);
+ }
+
+ if (pin > (current_plat->phy_pin_count - 1) || pin < 0)
+ return NULL;
+ return (char*) current_plat->pins[pin].name;
+}
+
+int
+mraa_get_default_i2c_bus(uint8_t platform_offset)
+{
+ if (plat == NULL)
+ return -1;
+ if (platform_offset == MRAA_MAIN_PLATFORM_OFFSET) {
+ return plat->def_i2c_bus;
+ } else {
+ if (mraa_has_sub_platform())
+ return plat->sub_platform->def_i2c_bus;
+ else
+ return -1;
+ }
+}
+
+
+mraa_boolean_t
+mraa_file_exist(const char* filename)
+{
+ glob_t results;
+ results.gl_pathc = 0;
+ glob(filename, 0, NULL, &results);
+ int file_found = results.gl_pathc == 1;
+ globfree(&results);
+ return file_found;
+}
+
+mraa_boolean_t
+mraa_file_contains(const char* filename, const char* content)
+{
+ mraa_boolean_t found = 0;
+ if ((filename == NULL) || (content == NULL)) {
+ return 0;
+ }
+
+ char* file = mraa_file_unglob(filename);
+ if (file != NULL) {
+ size_t len = 1024;
+ char* line = malloc(len);
+ if (line == NULL) {
+ free(file);
+ return 0;
+ }
+ FILE* fh = fopen(file, "r");
+ if (fh == NULL) {
+ free(file);
+ free(line);
+ return 0;
+ }
+ while ((getline(&line, &len, fh) != -1) && (found == 0)) {
+ if (strstr(line, content)) {
+ found = 1;
+ break;
+ }
+ }
+ fclose(fh);
+ free(file);
+ free(line);
+ }
+ return found;
+}
+
+mraa_boolean_t
+mraa_file_contains_both(const char* filename, const char* content, const char* content2)
+{
+ mraa_boolean_t found = 0;
+ if ((filename == NULL) || (content == NULL)) {
+ return 0;
+ }
+
+ char* file = mraa_file_unglob(filename);
+ if (file != NULL) {
+ size_t len = 1024;
+ char* line = malloc(len);
+ if (line == NULL) {
+ free(file);
+ return 0;
+ }
+ FILE* fh = fopen(file, "r");
+ if (fh == NULL) {
+ free(file);
+ free(line);
+ return 0;
+ }
+ while ((getline(&line, &len, fh) != -1) && (found == 0)) {
+ if (strstr(line, content) && strstr(line, content2)) {
+ found = 1;
+ break;
+ }
+ }
+ fclose(fh);
+ free(file);
+ free(line);
+ }
+ return found;
+}
+
+char*
+mraa_file_unglob(const char* filename)
+{
+ glob_t results;
+ char* res = NULL;
+ results.gl_pathc = 0;
+ glob(filename, 0, NULL, &results);
+ if (results.gl_pathc == 1)
+ res = strdup(results.gl_pathv[0]);
+ globfree(&results);
+ return res;
+}
+
+mraa_boolean_t
+mraa_link_targets(const char* filename, const char* targetname)
+{
+ int size = 100;
+ int nchars = 0;
+ char* buffer = NULL;
+ while (nchars == 0) {
+ buffer = (char*) realloc(buffer, size);
+ if (buffer == NULL)
+ return 0;
+ nchars = readlink(filename, buffer, size);
+ if (nchars < 0) {
+ free(buffer);
+ return 0;
+ } else {
+ buffer[nchars] = '\0';
+ }
+ if (nchars >= size) {
+ size *= 2;
+ nchars = 0;
+ }
+ }
+ if (strstr(buffer, targetname)) {
+ free(buffer);
+ return 1;
+ } else {
+ free(buffer);
+ return 0;
+ }
+}
+
+static int
+mraa_count_i2c_files(const char* path, const struct stat* sb, int flag, struct FTW* ftwb)
+{
+ switch (sb->st_mode & S_IFMT) {
+ case S_IFLNK:
+ num_i2c_devices++;
+ break;
+ }
+ return 0;
+}
+
+int
+mraa_find_i2c_bus(const char* devname, int startfrom)
+{
+ char path[64];
+ int fd;
+ int i = startfrom;
+ int ret = -1;
+
+ // because feeding mraa_find_i2c_bus result back into the function is
+ // useful treat -1 as 0
+ if (startfrom < 0) {
+ startfrom = 0;
+ }
+
+ // find how many i2c buses we have if we haven't already
+ if (num_i2c_devices == 0) {
+ if (nftw("/sys/class/i2c-dev/", &mraa_count_i2c_files, 20, FTW_PHYS) == -1) {
+ return -1;
+ }
+ }
+
+ // i2c devices are numbered numerically so 0 must exist otherwise there is
+ // no i2c-dev loaded
+ if (mraa_file_exist("/sys/class/i2c-dev/i2c-0")) {
+ for (i; i < num_i2c_devices; i++) {
+ off_t size, err;
+ snprintf(path, 64, "/sys/class/i2c-dev/i2c-%u/name", i);
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ break;
+ }
+ size = lseek(fd, 0, SEEK_END);
+ if (size < 0) {
+ syslog(LOG_WARNING, "mraa: failed to seek i2c filename file");
+ close(fd);
+ break;
+ }
+ err = lseek(fd, 0, SEEK_SET);
+ if (err < 0) {
+ syslog(LOG_WARNING, "mraa: failed to seek i2c filename file");
+ close(fd);
+ break;
+ }
+ char* value = malloc(size);
+ if (value == NULL) {
+ syslog(LOG_ERR, "mraa: failed to allocate memory for i2c file");
+ close(fd);
+ break;
+ }
+ ssize_t r = read(fd, value, size);
+ if (r > 0) {
+ if (strcasestr(value, devname) != NULL) {
+ free(value);
+ close(fd);
+ return i;
+ }
+ } else {
+ syslog(LOG_ERR, "mraa: sysfs i2cdev failed");
+ }
+ free(value);
+ close(fd);
+ }
+ } else {
+ syslog(LOG_WARNING, "mraa: no i2c-dev detected, load i2c-dev");
+ }
+
+ return ret;
+}
+
+mraa_boolean_t
+mraa_is_sub_platform_id(int pin_or_bus)
+{
+ return (pin_or_bus & MRAA_SUB_PLATFORM_MASK) != 0;
+}
+
+int
+mraa_get_sub_platform_id(int pin_or_bus)
+{
+ return pin_or_bus | MRAA_SUB_PLATFORM_MASK;
+}
+
+int
+mraa_get_sub_platform_index(int pin_or_bus)
+{
+ return pin_or_bus & (~MRAA_SUB_PLATFORM_MASK);
+}
+
+int
+mraa_get_iio_device_count()
+{
+ return plat_iio->iio_device_count;
+}
+
+int
+mraa_find_iio_device(const char* devicename)
+{
+ int i = 0;
+ for (i; i < plat_iio->iio_device_count; i++) {
+#if 0
+ // compare with devices array
+ if (!strcmp() {
+ }
+#endif
+ }
+ return 0;
}
projects / contrib / mraa.git / blobdiff