Help Map pins from LPC1768 to nRF51DK

[raffaeu]

Hi, I have purchased a Nordic nRF51DK which works perfectly. Suddenly I purchased an EaEpaper and start to follow this tutorial developer.mbed.org/.../Homepage to map it to my board. The problem is that I can't map all the pins from LPC1768 to nRF51DK. I want to write the firmware for this awesome EaPaper screen also for the Nordic development kit but I am new to electronics and I can't fully understand all ports mappings. I am almost done but I miss few ports.

This is what I have accomplished so far

---------------------------------------------------------
| Screen   | LPC1768   | nRF51DK       | TYPE    | 
---------------------------------------------------------
| 1 GND         | GND         | GND         | GND     |
---------------------------------------------------------
| 2 3V3          | VOUT        | VDD         | 3.3
---------------------------------------------------------
| 3 SCK          | P7            | P29          | SCK
---------------------------------------------------------
| 4 MOSI        | P5            | P25          | MOSI
---------------------------------------------------------
| 5 MISO        | P6            | P28          | MISO
---------------------------------------------------------
| 6 SSEL         | P8           | ---            | GPIO
---------------------------------------------------------
| 7 BUSY         | P13         | ---            | GPIO
---------------------------------------------------------
| 8 BORDER     | P10         | ---            | GPIO
---------------------------------------------------------
| 9 SCL           | P27          | P7            | SCL
---------------------------------------------------------
|10 SDA          | P28         | P30           | SDA
---------------------------------------------------------
|11 PWM         | P26          | ---            | PWM
---------------------------------------------------------
|12 RESET       | P12          | ---            | GPIO
---------------------------------------------------------
|13 POWER      | P9            | ---            | GPIO
---------------------------------------------------------
|14 DISC         | P11          | ---             | GPIO
---------------------------------------------------------

I have two questions to complete my mapping and re-write the firmware for the EaEpaper for nRF51DK:

• What is a GPIO port? What is a PWM port?
• Does the nRF51DK expose 3.3 volt on VDD or are they all 5 volts?

I have also included the schema of nRF51DK

and LPC1768

[mountain8848]

What is a GPIO port? What is a PWM port?

--》P0.xx of nRF51DK are all is GPIO; nRF51422 Product Specification and nRF51 Series Reference Manual we could use TIMER and GPIO to generate PWM signal.

---

Does the nRF51DK expose 3.3 volt on VDD or are they all 5 volts?

--》 From nRF51-DK - User Guide v1_0 : www.nordicsemi.com/.../96846352, Page15, Fig11, pin above <5V> pin is 3.3V;

[Stian Røed Hafskjold]

Please have a look at Section 14: General-Purpose Input/Output (GPIO) in the nRF51 Series Reference Manual.

The GPIO Port peripheral implements up to 32 pins, PIN0 through PIN31. Each of these pins can be individually configured in the PIN_CNF[n] registers (n=0..31).

This means that you can choose whichever pin you want for the GPIO's. The same goes for the PWM, this can be configured to use any pin.

[raffaeu]

Hi Stian and thank you for the answer and the link which I couldn't find by myself. I have mapped to different ports the monitor and going to re-write the provided firmware. As soon as I have a results I will update this post for the other developers interested in the topic

[Stian Røed Hafskjold]

We would really appreciate that! Good luck, and you are of course welcome to ask any other questions you might have in another thread.