Yoctopuce Yocto-I2C Mode D'emploi page 179

Un exemple réel
Lancez Xcode 4.2 et ouvrez le projet exemple correspondant, fourni dans le répertoire Examples/
Doc-GettingStarted-Yocto-I2C de la librairie Yoctopuce.
Vous reconnaîtrez dans cet exemple l'utilisation des fonctions expliquées ci-dessus, cette fois
utilisées avec le décorum nécessaire à en faire un petit programme d'exemple concret.
#import <Foundation/Foundation.h>
#import "yocto_api.h"
#import "yocto_i2cport.h"
static void usage(void)
{
NSLog(@"usage: demo
NSLog(@" demo
NSLog(@" demo any
exit(1);
}
int main(int argc,
{
NSError *error;
if (argc < 2) {
usage();
}
@autoreleasepool {
// Setup the API to use local USB devices
if([YAPI RegisterHub:@"usb": &error] != YAPI_SUCCESS) {
NSLog(@"RegisterHub error:
return 1;
}
NSString *target
if ([target isEqualToString:@"any"]) {
YI2cPort *i2cPort
if (i2cPort
NSLog(@"No module connected (check USB
return 1;
}
target = [[i2cPort
}
YI2cPort *i2cPort
if ([i2cPort isOnline]) {
[i2cPort set_i2cMode:@"400kbps"];
[i2cPort set_i2cVoltageLevel:Y_I2CVOLTAGELEVEL_3V3];
[i2cPort reset];
NSLog(@"****************************");
NSLog(@"* make sure voltage levels
NSLog(@"* are properly configured
NSLog(@"****************************");
NSMutableArray
[toSend addObject:[NSNumber
NSMutableArray
short int tempReg
[[received
if (tempReg
tempReg |=
} else {
tempReg &=
}
NSLog(@"Current temperature: %f
} else {
NSLog(@"Module not connected (check identification and USB
}
[YAPI FreeAPI];
}
return 0;
www.yoctopuce.com
<serial_number>");
<logical_name>");
(use any discovered
const char * argv[])
%@", [error localizedDescription]);
= [NSString stringWithUTF8String:argv[1]];
= [YI2cPort FirstI2cPort];
== NULL) {
module] serialNumber];
= [YI2cPort FindI2cPort:
[target stringByAppendingString:@".i2cPort"]];
*toSend = [NSMutableArray
numberWithUnsignedChar:0x05]];
*received = [i2cPort i2cSendAndReceiveArray:0x1f :toSend :2];
= ([[received objectAtIndex:0] unsignedCharValue]
objectAtIndex:1]
& 0x1000) {
0xf000; // perform sign extension
0x0fff; // clear status bits
'C\n", tempReg
21. Utilisation du Yocto-I2C en Objective-C
device)");
cable)");
*");
*");
arrayWithCapacity:1];
unsignedCharValue];
/ 16.0);
<< 8) +
cable)\n");
171