Doubt in Peripheral Pin Select - dsPIC33EP256MU810

[Joyhtidas]

Hi,
I am designing the hardware for servo control application.
I need to use SPI in dsPIC. I am little confused about PPS.
I want SDO,SDI,SCK to be selected through PPS.

Can somebody help to solve this problem

note: - The processor is dsPIC33EP256MU810

Thanks in advance

 

[keith1200rs]

You can assign the peripherals such as SPI, UART, PWM to be on any of the pins labelled RPxx - you are not restricted to just one location like on the older chips. I think the ones marked RPIxx can only be used as peripheral inputs, not outputs. There should be a list in the manual of which are available for inputs and which are outputs.

Keith

 

[Joyhtidas]

Hi,
I checked the pin assignment, but I didn't found any option to SDO to assign
remaining things such as SDI,SCK and SS is found except SDO.

Thanks

 

[keith1200rs]

The inputs are listed on page 192/3 in the manual - I guess you have found those. The outputs are listed separately - see page 196/7.

Keith.

---------- Post added at 09:28 ---------- Previous post was at 09:23 ----------

By the way, it is useful to look at some of the example programs such as those for the Explorer 16. In there you will find useful #defines such as

#define SDO1_IO		7

in iomapping.h and usage such as

RPOR10bits.RP21R = SDO2_IO;

in iomapping.c.

Keith.

---------- Post added at 09:31 ---------- Previous post was at 09:28 ----------

... and make sure you download the reference manual sections as well - there is more detail in there.

---------- Post added at 09:57 ---------- Previous post was at 09:31 ----------

One other confusion can arise because "inputs are mapped on the basis of the peripheral" whereas "outputs are mapped on the basis of the pin"!