Hi,

It seems very simple but I cannot combine four uint8_t and make uint32_t conventionally or even using the predefined function: "CY_U3P_MAKEDWORD". The result is always the least significant byte:

for example:

uint8_t byte4, byte3, byte2, byte1;

uint32_t readDataD;

byte4 (MSB) = 0xFE; byte3 = 0x56; byte2 = 0x78; byte1 (LSB) = 0x1F;

readDataDW = CY_U3P_MAKEDWORD(byte4, byte3, byte2, byte1);

The result is

readDataDW = 0x1F 0x1F 0x1F 0x1F

Thanks,

Nazila

I'll look at it and let you know if anything is wrong.

In the meantime you can always shift and add the numbers.

Cheers,

Anand

That method did not work (If you look at the definition of the function is the same idea). Eventually, I used an array and copy them in the memory one by one.

 unsigned long ulTotal;

ulTotal = byte4;

ulTotal = (ulTotal  << 8) + byte3;

ulTotal = (ulTotal  << 8) + byte2;

ulTotal = (ulTotal  << 8) + byte1;

C has the "union" declaration to solve cases like this. It overlays the same data-area (an uint32) with 4 int8. Look here: http://publications.gbdirect.co.uk/c_book/chapter6/unions.html

union 
{
uint32 Data32;
uint8 Bytes[4];
} My32Var;

My32Var.Bytes[0] = 0xCA;
My32Var.Bytes[1] = 0xFF;
My32Var.Bytes[2] = 0xEE;
My32Var.Bytes[3] = 0x00;

Take care of the endianess of the underlying compiler, Keil and GNU differ here!

Bob