In this topic I will show how to connect nunchuck controller with stm32microcontroller by using software stm32cubemx .
Nunchuck controller is used i2c interface.
To set up i2c interface with stm32cubemx you can view at this topic
Nunchuck address is 0x52.Clock was set up with 100kHz.
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#define nunchuck 0x52<<1
I2C_HandleTypeDef hi2c1;
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int main(void)
{
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char cmd[1];
uint8_t data[6];
uint8_t handShake[2] ;
handShake[0]=0xf0;
handShake[1]=0x55;
HAL_I2C_Master_Transmit(&hi2c1,nunchuck,handShake, 2,0×1000);
HAL_Delay(100);
handShake[0]=0xfb;
handShake[1]=0x00;
HAL_I2C_Master_Transmit(&hi2c1,nunchuck,handShake, 2,0×1000);
HAL_Delay(100);
while (1)
{
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cmd[0]=0x00;
HAL_I2C_Master_Transmit(&hi2c1,nunchuck,cmd, 1,0×1000);
HAL_Delay(1);
HAL_I2C_Master_Receive(&hi2c1, nunchuck, data,6,0×1000);
uint16_t accelX = (data[2] << 2)|((data[5] >> 2) & 0x03) ;
uint16_t accelY = (data[3] << 2)|((data[5] >> 4) & 0x03) ;
uint16_t accelZ = (data[4] << 2)|((data[5] >> 6) & 0x03) ;
uint8_t buttonc=(data[5]&0x02)>>1;
uint8_t buttonz=data[5]&0x01;
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}
}
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