SPDR not receiving data

Hi, IÂ'm trying to use SPI in AT89S8252. Problem is that I canÂ't write to SPDR. SPDR doesnÂ't receive data but still software sets SPIF flag. Also I can write the 00h value of the SPDR to ie. R2...
SPDR not receiving data

Hi, IÂ'm trying to use SPI in AT89S8252. Problem is that I canÂ't write to SPDR. SPDR doesnÂ't receive data but still software sets SPIF flag. Also I can write the 00h value of the SPDR to ie. R2...
What will be the reason for MDR register not getting updated??

I'm trying I2C while debugging i found that the I2CMDR register is not updating I'm uploading screenshots below.
What will be the reason for MDR register not getting updated??

I'm trying I2C while debugging i found that the I2CMDR register is not updating I'm uploading screenshots below.
Register not getting set

I have the sample KEIL USB HID project for the LPC2148 and I have a project I started in which I am going through the KEIL code section by section attempting to thouroughly understand its function and...