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mraa.c: Added init platform from json file

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Signed-off-by: Houman Brinjcargorabi <houman.brinjcargorabi@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Houman Brinjcargorabi
2016-05-24 16:41:45 +01:00
committed by Brendan Le Foll
parent 346f447c4d
commit 8ba8ce3b26
6 changed files with 835 additions and 10 deletions
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63
src/mraa.c
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@@ -40,9 +40,11 @@
#include <stdio.h>
#include <stdbool.h>
#include <errno.h>
#include <unistd.h>
#include <ctype.h>
#include <limits.h>
#if defined(IMRAA)
#include <json-c/json.h>
#include <sys/stat.h>
@@ -59,13 +61,14 @@
#include "spi.h"
#include "uart.h"
#define IIO_DEVICE_WILDCARD "iio:device*"
mraa_board_t* plat = NULL;
mraa_iio_info_t* plat_iio = NULL;
mraa_lang_func_t* lang_func = NULL;
static char* platform_name = NULL;
char* platform_name = NULL;
static char* platform_long_name = NULL;
static int num_i2c_devices = 0;
@@ -99,7 +102,9 @@ imraa_init()
if (plat != NULL) {
return MRAA_SUCCESS;
}
char* env_var;
mraa_result_t ret;
mraa_platform_t platform_type = MRAA_NULL_PLATFORM;
uid_t proc_euid = geteuid();
struct passwd* proc_user = getpwuid(proc_euid);
@@ -113,19 +118,34 @@ imraa_init()
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);
mraa_platform_t platform_type;
// Check to see if the enviroment variable has been set
env_var = getenv(MRAA_JSONPLAT_ENV_VAR);
if (env_var != NULL) {
// We only care about success, the init will write to syslog if things went wrong
switch ((ret = mraa_init_json_platform(env_var))) {
case MRAA_SUCCESS:
platform_type = plat->platform_type;
break;
default:
syslog(LOG_NOTICE, "libmraa was unable to initialise a platform from json");
}
}
// Not an else because if the env var didn't load what we wanted maybe we can still load something
if (platform_type == MRAA_NULL_PLATFORM) {
#if defined(X86PLAT)
// Use runtime x86 platform detection
platform_type = mraa_x86_platform();
// Use runtime x86 platform detection
platform_type = mraa_x86_platform();
#elif defined(ARMPLAT)
// Use runtime ARM platform detection
platform_type = mraa_arm_platform();
// Use runtime ARM platform detection
platform_type = mraa_arm_platform();
#elif defined(MOCKPLAT)
// Use mock platform
platform_type = mraa_mock_platform();
// Use mock platform
platform_type = mraa_mock_platform();
#else
#error mraa_ARCH NOTHING
#endif
}
if (plat != NULL) {
plat->platform_type = platform_type;
@@ -206,6 +226,7 @@ mraa_init()
void
mraa_deinit()
{
int i = 0;
if (plat != NULL) {
if (plat->pins != NULL) {
free(plat->pins);
@@ -217,6 +238,19 @@ mraa_deinit()
}
free(sub_plat);
}
#if defined(JSONPLAT)
if (plat->platform_type == MRAA_JSON_PLATFORM) {
// Free the platform name
free(plat->platform_name);
// Free the UART device path
for (i = 0; i < plat->uart_dev_count; i++) {
if (plat->uart_dev[i].device_path != NULL) {
free(plat->uart_dev[i].device_path);
}
}
}
#endif
free(plat);
}
@@ -1235,3 +1269,12 @@ mraa_init_io(const char* desc)
syslog(LOG_ERR, "mraa_init_io: Invalid IO type given.");
return NULL;
}
#ifndef JSONPLAT
mraa_result_t
mraa_init_json_platform(const char* desc)
{
return MRAA_ERROR_FEATURE_NOT_SUPPORTED;
}
#endif