Yoctopuce Yocto-GPS, User Manual

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}
Each property
xxx
of the module can be read thanks to a method of type
get_xxxx
, and
properties which are not read-only can be modified with the help of the
set_xxx:
method. For
more details regarding the used functions, refer to the API chapters.
Changing the module settings
When you want to modify the settings of a module, you only need to call the corresponding
set_xxx:
function. However, this modification is performed only in the random access memory
(RAM) of the module: if the module is restarted, the modifications are lost. To memorize them
persistently, it is necessary to ask the module to save its current configuration in its permanent
memory. To do so, use the
saveToFlash
method. Inversely, it is possible to force the module to
forget its current settings by using the
revertFromFlash
method. The short example below
allows you to modify the logical name of a module.
#import <Foundation/Foundation.h>
#import "yocto_api.h"
static void usage ( const char *exe )
{
NSLog ( @"usage: %s <serial> <newLogicalName> \n " , exe ) ;
exit ( 1 ) ;
}
int main ( int argc, const char * argv [])
{
NSError *error;
@autoreleasepool {
// Setup the API to use local USB devices
if([ YAPI RegisterHub: @"usb" :&error ] != YAPI_SUCCESS ) {
NSLog ( @"RegisterHub error: %@" , [ error localizedDescription ]) ;
return 1 ;
}
if( argc < 2 )
usage ( argv [ 0 ]) ;
NSString *serial_or_name = [ NSString stringWithUTF8String:argv [ 1 ]] ;
// use serial or logical name
YModule *module = [ YModule FindModule:serial_or_name ] ;
if ( module.isOnline ) {
if ( argc >= 3 ) {
NSString *newname = [ NSString stringWithUTF8String:argv [ 2 ]] ;
if ( ! [ YAPI CheckLogicalName:newname ]) {
NSLog ( @"Invalid name (%@) \n " , newname ) ;
usage ( argv [ 0 ]) ;
}
module.logicalName = newname;
[ module saveToFlash ] ;
}
NSLog ( @"Current name: %@ \n " , module.logicalName ) ;
} else {
NSLog ( @"%@ not connected (check identification and USB cable) \n " ,
serial_or_name ) ;
}
[ YAPI FreeAPI ] ;
}
return 0 ;
}
Warning: the number of write cycles of the nonvolatile memory of the module is limited. When this
limit is reached, nothing guaranties that the saving process is performed correctly. This limit, linked to
the technology employed by the module micro-processor, is located at about 100000 cycles. In short,
you can use the
saveToFlash
function only 100000 times in the life of the module. Make sure you
do not call this function within a loop.
10. Using Yocto-GPS with Objective-C
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