/*Requires Delay after call*/
uint8 MagReadByte(uint8 registerAddress, uint8 *readPtr)
{
/* Pointer to the register address */
//uint8 *writePtr = ®isterAddress;/* changed writeptr to ®isterAddress*/
uint8 i2c_status = I2C_MasterClearStatus();
//LCD_ClearDisplay();
LCD_Position(1,7);
LCD_PrintInt8(i2c_status);
I2C_MasterClearReadBuf();
I2C_MasterClearWriteBuf();
/* Start the I2C transmission for a read */
uint8 status = I2C_MasterWriteBuf(SLAVE_ADDRESS, ®isterAddress, 1, I2C_MODE_NO_STOP);
/*wait for the tranmission to finish */
while (I2C_MasterStatus() && !I2C_MSTAT_WR_CMPLT){}
/* Needed because of some bug in the psoc I2C tramission */
CyDelay(1);
/* read a byte using I2C */
//return I2C_MasterReadBuf(SLAVE_ADDRESS, readPtr, 1, I2C_MODE_REPEAT_START);
//or TO ENSURE READ IS COMPLETE BEFORE ADDITIONAL CODE EXECUTED
status |= I2C_MasterReadBuf(SLAVE_ADDRESS,readPtr , 1, I2C_MODE_REPEAT_START);
while (I2C_MasterStatus() && !I2C_MSTAT_RD_CMPLT){}
CyDelay(1); //Needed because of some bug in the psoc I2C tramission
return status;
}
void RunNunchuck(void){
uint8 clear[] = {0x00};
uint8 buffer[16];
unsigned short wiichuck[7];
Err_LED_1_Write(0);
Err_LED_2_Write(0);
JoystickInit();
I2C_Start();
InitNunchuck();
for(;;)
{
I2C_MasterClearStatus();
CyDelay(1);
I2C_MasterWriteBuf(0x52, clear, 1, I2C_MODE_COMPLETE_XFER);
CyDelay(1);
I2C_MasterWriteBuf(0x52, clear, 1, I2C_MODE_COMPLETE_XFER);
CyDelay(1);
I2C_MasterWriteBuf(0x52, clear, 1, I2C_MODE_COMPLETE_XFER);
CyDelay(1);
if (0u != (I2C_MasterStatus() & I2C_MSTAT_ERR_XFER)){
InitNunchuck();
}else{
I2C_MasterClearStatus();
CyDelay(1);
I2C_MasterReadBuf(0x52, buffer, 6, I2C_MODE_COMPLETE_XFER); // Nunchuck data is 6 bytes, but for whatever reason, MEMOREX Wireless Nunchuck wants to send 8...
CyDelay(1);
if (0u != (I2C_MasterStatus() & I2C_MSTAT_ERR_XFER)){
InitNunchuck();
}else{
wiichuck[0] = buffer[1];// X Axis Joystick
wiichuck[1] = buffer[0];// Y Axis Joystick
wiichuck[2] = (((unsigned short) buffer[2]) << 2) + (((unsigned short) buffer[5]) & (3<<2)); // X Axis Accel
wiichuck[3] = (((unsigned short) buffer[3]) << 2) + (((unsigned short) buffer[5]) & (3<<4)); // Y Axis Accel
wiichuck[4] = (((unsigned short) buffer[4]) << 2) + (((unsigned short) buffer[5]) & (3<<6)); // Z Axis Accel
wiichuck[5] = buffer[5] & (1 << 1) ? 0 : 1; //'C' Button
wiichuck[6] = buffer[5] & (1 << 0) ? 0 : 1; //'Z' Button
if(wiichuck[5]) JoystickOut(128,128);
else JoystickOut(wiichuck[0],wiichuck[1]);
}
}
Err_LED_2_Write(~Err_LED_2_Read());
CyDelay(100);
}
}
/** Blocking reading data.
* @param obj The i2c object
* @param address 7-bit address (last bit is 1)
* @param data The buffer for receiving
* @param length Number of bytes to read
* @param stop Stop to be generated after the transfer is done
* @return Number of read bytes
*/
int i2c_read(i2c_t *obj, int address, char *data, int length, int stop)
{
if (!obj->initied)
{
CyGlobalIntEnable;
I2C_Start();
obj->initied = 1;
}
int status = I2C_MasterReadBuf(address, (uint8_t*)data, length, stop ? I2C_MODE_COMPLETE_XFER : I2C_MODE_NO_STOP);
if (status != I2C_MSTR_NO_ERROR)
{
debug("mbed I2C read failed with error: %i\r\n", status);
return 0;
}
int timeout = 100, to = 0;
while((I2C_MasterStatus() & (I2C_MSTAT_RD_CMPLT | I2C_MSTAT_ERR_XFER)) == 0 && to++ < timeout)
{
CyDelayUs(10);
}
if (I2C_MasterStatus() & I2C_MSTAT_ERR_XFER)
{
debug("i2c read failed with status: 0x%X\r\n!",I2C_MasterStatus());
return 0;
}
if (to == timeout)
{
debug("I2C read timeout!\r\n");
return 0;
}
return length;
}
/**
* @brief Read multiple bytes from the MAG3110
* @details User supplies the register that we are going to read from and the buffer that we are going to place the data
* that we read from the MAG3110. REQUIRES DELAY AFTER CALL
*
* @param registerAddress Address of the first register we are going to read
* @param readPtr Pointer to the buffer that the data that we read will be placed
* @param size Number of bytes that we are going to read from the MAG3110
* @return Error status of the function
*/
uint8 MagReadMultipleByte(uint8 registerAddress, uint8 *readPtr,uint8 size)
{
uint8 i2c_status = I2C_MasterClearStatus();
LCD_Position(1,7);
LCD_PrintInt8(i2c_status);
I2C_MasterClearReadBuf();
I2C_MasterClearWriteBuf();
/* We start by writng the slave address and the register we are going to start the rea from*/
uint8 status = I2C_MasterWriteBuf(SLAVE_ADDRESS, ®isterAddress, 1, I2C_MODE_NO_STOP);
/*wait for the tranmission to finish */
while (I2C_MasterStatus() && !I2C_MSTAT_RD_CMPLT){}
/* Needed because of some bug in the psoc I2C tramission */
CyDelay(1);
/* read data from the MAG I2C */
//return I2C_MasterReadBuf(SLAVE_ADDRESS,readPtr , size, I2C_MODE_REPEAT_START);
//or TO ENSURE READ IS COMPLETE BEFORE ADDITIONAL CODE EXECUTED
status |= I2C_MasterReadBuf(SLAVE_ADDRESS,readPtr , size, I2C_MODE_REPEAT_START);
while (I2C_MasterStatus() && !I2C_MSTAT_RD_CMPLT){}
CyDelay(1); //Needed because of some bug in the psoc I2C tramission
return status;
}
