Hello! I was looking at learning how to use port registers for PSOC5, but I keep getting numerous errors. Here's the code which simply sets all pins on Port0 as pull up resistors. 

#include <device.h>

void main(void)

{

while(1)

{

    PRT0DM0=0xFF;

 PRT0DM1=0xFF;

 PRT0DM2=0x00;

 PRT0DR=0x01;

}

}

'PRT0DM0' undeclared (first use in this function) 

'PRT0DM1' undeclared (first use in this function) 

'PRT0DM2' undeclared (first use in this function) 

'PRT0DR' undeclared (first use in this function) 

The command 'arm-none-eabi-gcc.exe' failed with exit code '1'.

Thank you! 

Differently from PSoC1 the port registers and pins are addressed with some other functions.

Have a look at Help -> Documentation -> System Reference -> System Reference Guide in PSoC Creator. In chapter 7 there are descriptions of the APIs to access port-pins. I would strongly avoid to set the modes of pins via registers. There is a sophisticated configuration dialog allowing to specify some more properties than in a PSoC1.

Bob

 The code does not compile because, the compiler does not recognise PRT0DM0, PRT0DM1 and PRT0DM2. The register defintions for any device is present in the file, "cydevice_trm.h". PRT0DM0 is accessed as CYREG_PRT0_DM0. 

 Since the defintion actually includes the register address it is recommended to use the following API.

CY_SET_REG8(CYREG_PRT0_DM0,0xFF);

CY_SET_REG8(CYREG_PRT0_DM1,0xFF);

CY_SET_REG8(CYREG_PRT0_DM2,0xFF);

 You can find these API defintions in "cytypes.h" file.