USB low-full-high speed peripherals Forum Discussions

[CSK10]

Hello ,

I have a peice of code written for interfacing a  I2c based temperature sensor with Fx2lp. If i write this code in TD_POLL function the device does not re-enumerate.
Can someone explain me this reason and also then what would be the appropriate approach  here ?

Thanks  

[MallikaK_22]

Hi,

Could you please provide more details about your application like what sensor are you using and schematics if possible.

How does the device enumerate after reprogramming?

Regards,

Mallika

[CSK10]

Hi I am using temperature sensor 102  for interfacing . I also stumbled upon this article Why Certain EZ-USB® FX2LP™ DVK Firmware Examples F... - Infineon Developer Community  but still doesnt help me much.

EZUSB_InitI2C(); // Initialize I2C bus
BUFFER[0] = Reg_temp;
EZUSB_WriteI2C(Tmp102_ADDR, 1, BUFFER);
EZUSB_WaitForEEPROMWrite(Tmp102_ADDR); // wait for I2C write to complete

EZUSB_ReadI2C(Tmp102_ADDR, 2, BUFFER);
//Combine the bytes
val = ((WORD)BUFFER[0] << 4) | (BUFFER[1] >> 4);
// Convert to 2's complement, since temperature can be negative
if ( val > 0x7FF )
{
val |= 0xF000;
}
// Convert to float temperature value (Celsius)
temp_c = val * 0.0625;
// Convert temperature to decimal format
temp_c *= 100;
sprintf((char*)BUFFER,
"%u.%02u C\r\n",
((unsigned int)temp_c / 100),
((unsigned int)temp_c % 100));

this is the code that i write in the TD_POLL function