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Topic: Cheap ebay nunchuck NOT working (Read 15 times) previous topic - next topic

dcahveind

i love you crimony

i had the same headache and now it works beautifully

manut

hello,
I also bought the cheap wii nunchuck from china, and I'd like to know how to connect it because there is 5 wires(white, black, red, yellow, green), I think the original one has 4..
thanx

kuusmam

Hi,

I have the same problem , though maine came ftom amzone uk.  The remote is working , but nunchuk not.

I went through this site , but as not any expert , hard to understand what can possibly be done ?

Can anyone please describe the steps.

Tnx

jdc

Hi all,

I have an issue with the low costs nunchucks from China...

I have tried the workaround from crimony and updated the init block

Here the code I'm using:
Code: [Select]

#include <Wire.h>

void setup()
{
 Serial.begin(19200);
 Serial.print ("Begin of setup\n");
 nunchuck_setpowerpins(); // use analog pins 2&3 as fake gnd & pwr
 nunchuck_init(); // send the initilization handshake
 Serial.print ("End of setup\n");
}

void loop()
{
 nunchuck_get_data();
 nunchuck_print_data();
 delay(100);
}


//
// Nunchuck functions
//

static uint8_t nunchuck_buf[6];   // array to store nunchuck data,
uint8_t ctrlr_type[6];


// Uses port C (analog in) pins as power & ground for Nunchuck
static void nunchuck_setpowerpins()
{
#define pwrpin PORTC3
#define gndpin PORTC2
   DDRC |= _BV(pwrpin) | _BV(gndpin);
   PORTC &=~ _BV(gndpin);
   PORTC |=  _BV(pwrpin);
   delay(100);  // wait for things to stabilize        
}

// initialize the I2C system, join the I2C bus,
// and tell the nunchuck we're talking to it
void nunchuck_init()
{
 /*Wire.begin();                      // join i2c bus as master
 Wire.beginTransmission(0x52);      // transmit to device 0x52
 Wire.send(0x40);            // sends memory address
 Wire.send(0x00);            // sends sent a zero.  
 Wire.endTransmission();      // stop transmitting*/
 
 Serial.print ("Begin nunchuck init\n");
 byte cnt;
 Wire.begin();

 Serial.print ("Step 1\n");
 // init controller
 delay(1);
 Wire.beginTransmission(0x52);      // device address
 Wire.send(0xF0);                    // 1st initialisation register
 Wire.send(0x55);                    // 1st initialisation value
 Wire.endTransmission();
 delay(1);
 Wire.beginTransmission(0x52);
 Wire.send(0xFB);                    // 2nd initialisation register
 Wire.send(0x00);                    // 2nd initialisation value
 Wire.endTransmission();
 delay(1);
           
 Serial.print ("Step 2\n");
 // read the extension type from the register block        
 Wire.beginTransmission(0x52);
 Wire.send(0xFA);                    // extension type register
 Wire.endTransmission();
 Wire.beginTransmission(0x52);
 Wire.requestFrom(0x52, 6);               // request data from controller
 for (cnt = 0; cnt < 6; cnt++) {
   if (Wire.available()) {
     ctrlr_type[cnt] = Wire.receive(); // Should be 0x0000 A420 0101 for Classic Controller, 0x0000 A420 0000 for nunchuck
   }
 }
 Wire.endTransmission();
 delay(1);
           
 Serial.print ("Step 3\n");
 // send the crypto key (zeros), in 3 blocks of 6, 6 & 4.
 Wire.beginTransmission(0x52);
 Wire.send(0xF0);                    // crypto key command register
 Wire.send(0xAA);                    // sends crypto enable notice
 Wire.endTransmission();
 delay(1);
 Wire.beginTransmission(0x52);
 Wire.send(0x40);                    // crypto key data address
 for (cnt = 0; cnt < 6; cnt++) {
     Wire.send(0x00);                    // sends 1st key block (zeros)
 }
 Wire.endTransmission();
 Wire.beginTransmission(0x52);
 Wire.send(0x40);                    // sends memory address
 for (cnt = 6; cnt < 12; cnt++) {
     Wire.send(0x00);                    // sends 2nd key block (zeros)
 }
 Wire.endTransmission();
 Wire.beginTransmission(0x52);
 Wire.send(0x40);                    // sends memory address
 for (cnt = 12; cnt < 16; cnt++) {
   Wire.send(0x00);                    // sends 3rd key block (zeros)
 }
 Wire.endTransmission();
 delay(1);
 // end device init
}

// Send a request for data to the nunchuck
// was "send_zero()"
void nunchuck_send_request()
{
 Wire.beginTransmission(0x52);      // transmit to device 0x52
 Wire.send(0x00);            // sends one byte
 Wire.endTransmission();      // stop transmitting
}

// Receive data back from the nunchuck,
int nunchuck_get_data()
{
   int cnt=0;
   Wire.requestFrom (0x52, 6);      // request data from nunchuck
   while (Wire.available ()) {
     // receive byte as an integer
     nunchuck_buf[cnt] = nunchuk_decode_byte(Wire.receive());
     cnt++;
   }
   nunchuck_send_request();  // send request for next data payload
   // If we recieved the 6 bytes, then go print them
   if (cnt >= 5) {
    return 1;   // success
   }
   return 0; //failure
}

// Print the input data we have recieved
// accel data is 10 bits long
// so we read 8 bits, then we have to add
// on the last 2 bits.  That is why I
// multiply them by 2 * 2
void nunchuck_print_data()
{
 static int i=0;
 int joy_x_axis = nunchuck_buf[0];
 int joy_y_axis = nunchuck_buf[1];
 int accel_x_axis = nunchuck_buf[2]; // * 2 * 2;
 int accel_y_axis = nunchuck_buf[3]; // * 2 * 2;
 int accel_z_axis = nunchuck_buf[4]; // * 2 * 2;

 int z_button = 0;
 int c_button = 0;

 // byte nunchuck_buf[5] contains bits for z and c buttons
 // it also contains the least significant bits for the accelerometer data
 // so we have to check each bit of byte outbuf[5]
 if ((nunchuck_buf[5] >> 0) & 1)
   z_button = 1;
 if ((nunchuck_buf[5] >> 1) & 1)
   c_button = 1;

 if ((nunchuck_buf[5] >> 2) & 1)
   accel_x_axis += 2;
 if ((nunchuck_buf[5] >> 3) & 1)
   accel_x_axis += 1;

 if ((nunchuck_buf[5] >> 4) & 1)
   accel_y_axis += 2;
 if ((nunchuck_buf[5] >> 5) & 1)
   accel_y_axis += 1;

 if ((nunchuck_buf[5] >> 6) & 1)
   accel_z_axis += 2;
 if ((nunchuck_buf[5] >> 7) & 1)
   accel_z_axis += 1;

 Serial.print(i,DEC);
 Serial.print("\t");
 
 Serial.print("joy:");
 Serial.print(joy_x_axis,DEC);
 Serial.print(",");
 Serial.print(joy_y_axis, DEC);
 Serial.print("  \t");

 Serial.print("acc:");
 Serial.print(accel_x_axis, DEC);
 Serial.print(",");
 Serial.print(accel_y_axis, DEC);
 Serial.print(",");
 Serial.print(accel_z_axis, DEC);
 Serial.print("\t");

 Serial.print("but:");
 Serial.print(z_button, DEC);
 Serial.print(",");
 Serial.print(c_button, DEC);

 Serial.print("\r\n");  // newline
 i++;
}

// Encode data to format that most wiimote drivers except
// only needed if you use one of the regular wiimote drivers
char nunchuk_decode_byte (char x)
{
 x = (x ^ 0x17) + 0x17;
 return x;
}


When I upload the code to the board, no error is showned, but on the serial monitor I see only:

Begin of setup
Begin nunchuck init
Step 1

after that the sketch seems to be stopped.

If I unplug the data wire from the nunchuck then the sketch start again running

Can anyone help?

Thanks a lot
jdc

jdc

HEllo

Some more information regarding my issue mentionned in my previous post.

It seems the
Quote
Wire.endTransmission();
has something to do with my issue.
When I comment the line, the sketch continue to the next steps but at the end it is still not working properly.

If anyone can help ...  :)

Thanks a lot

jdc

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