dsPIC30F6014A microcontroller port driver(read/write I/Opins of the port)

Hi all,

I am using dsPIC30F6014A controller and I am trying to write a driver program to read/write the port pins. I am using C30 compiler. Since this controller has A,B,C,D,F,G ports I am writing a value to each port and trying to read the value written using functions for read/write operation. But I am facing some problems as mentioned below:
1. I am not able to read or write to PORTF and PORTG.
2. And also the value what I read/write is not getting reflected in the port registers(PORTA,PORTB...PORTG).
3. I am also not able to write a value more than "4000" to each of the ports though this is a 16 bit controller capable of reading/writing values upto 65535.

Please look into the issue and let me know. Please share the code to read/write to ports of dspic30f controller if you have it. Waiting for your earliest response.

Thankyou
Swapna

not all the bits exist in every port, see FIGURE 1-2: dsPIC30F6013A/6014A BLOCK DIAGRAM and TABLE 1-1: PINOUT I/O DESCRIPTIONS of the data sheet
https://ww1.microchip.com/downloads/en/DeviceDoc/70143E.pdf

are you writing/reading the ports or the latches? have you set/reset the TRIS bits as required? see section 8.0 I/O PORTS

Hi,

Ya I have gone through the data sheet of dspic30f controller for I/O ports. I am trying to read/write the latches. But PORTF and PORTG are not reading any values. Even though I set or reset the TRIS bits, PORTF and PORTG are not reading any values. Please let me know the reason for this. The code snippet which I am using to read values of all ports is as follows:


Dio_PortLevelType Dio_ReadPort(Dio_PortType PortId)
{
Dio_PortLevelType Level;
if(State!=INIT)
{
return PORT_FAIL;
}
else
{
/* Error condition for checking the valid portname*/
if(( PortId >='A'&& PortId<'E')|| (PortId >'E'&& PortId<='G'))
{
unsigned int *PortInAddress;
unsigned int Retval;
PortInAddress=0x0000;
Retval=0;
Level=0;
PortInAddress = GETPORTADDR(PortId);
Level=*(PortInAddress);
Retval=Level;
}


else
{
return INVALID_PORT_ID;
}
return PORT_SUCCESS;
}
}

Header file has:
#define GETPORTADDR(x) ((&LATA)+x-10) /*Gets the address of each port data latch and calculates the Port ID(A,B,C,D,E)*/

Please look into it and tell me what changes I need to do with respect to PORTF,PORTG,TRIS registers so that the values which I write to registers can be read.

Thankyou
Swapna

I think when writing to port you should make tris as input and while reading the port you have to make tris output.

Post the full code.