I have to interface 4x4 keypad with nrf52840

RE: I have to interface 4x4 keypad with nrf52840

Karl Ylvisaker — Mon, 08 Nov 2021 10:50:53 GMT

Hello again,

I am glad to hear that you have resolved your issue!

[quote user="nishant singh"]

p0.23 is not able to read ,why this is not able to read...... in nrf52840 but it's

work in nrf52832...

[/quote]

P0.23 is used for the external memory on the nRF52840 DK, but is not used for anything on the nRF52 DK which is why you may use it for your application without doing any hardware changes.

Please also make sure to check the pins you are using against the Pin Assignment of the SoC in question, to make sure that you are using a appropriate pin for your application.

Best regards,
Karl

RE: I have to interface 4x4 keypad with nrf52840

nishant singh — Mon, 08 Nov 2021 10:27:21 GMT

sir i have shortout the keypad problem,after change the gpio pins. because

p0.23 is not able to read ,why this is not able to read...... in nrf52840 but it's

work in nrf52832...

RE: I have to interface 4x4 keypad with nrf52840

Karl Ylvisaker — Mon, 08 Nov 2021 09:21:16 GMT

Please elaborate on what you have done, in detail, so that I may try to help you resolve the issue.

What have you tried? What did you observe? How did it differ from what you would have expected? Was there any errors generated? If so, which, and from where?

The more information you provide, the easier it will be for us to help you resolve your issue.

Best regards,
Karl

RE: I have to interface 4x4 keypad with nrf52840

nishant singh — Mon, 08 Nov 2021 05:03:17 GMT

but sir i have done the same things but not working

RE: I have to interface 4x4 keypad with nrf52840

Karl Ylvisaker — Wed, 03 Nov 2021 09:17:33 GMT

Hello again,

With this information I would then suggest that you take the working code that you have made for the peripheral blinky example and merge it into the BLE blinky example. It is easier to merge non-BLE parts into a BLE example than going the other way around.

Best regards,
Karl

RE: I have to interface 4x4 keypad with nrf52840

nishant singh — Wed, 03 Nov 2021 09:08:33 GMT

sir i want to add 4x4 keypad in ble_app_blinky example in ble peripheral

and 4x4 keypad working with blinky example in peripheral

RE: I have to interface 4x4 keypad with nrf52840

Karl Ylvisaker — Mon, 01 Nov 2021 12:13:26 GMT

Please elaborate further. Which example is working for your device, and which BLE peripheral example have you tried to merge the functionality into?
Which errors or issues are you facing when you try to merge the functionality into the BLE peripheral example?

You have still not answered all of my original questions regarding the keypad, so it is hard for me to advice you with so very limited knowledge of the hardware you are working with.

Best regards,
Karl

RE: I have to interface 4x4 keypad with nrf52840

nishant singh — Mon, 01 Nov 2021 09:56:29 GMT

Dear sir ,

I have used 4x4 keypad with peripherals example then it's working good

but 4x4 keypad is not working with any example of ble peripheral

RE: I have to interface 4x4 keypad with nrf52840

Karl Ylvisaker — Mon, 01 Nov 2021 09:28:34 GMT

Hello again,

[quote user="nishant singh"]how to initialize 4x4 keypad in ble_app_blinky project. and how to read and write.[/quote][quote user="Karl Ylvisaker"]Is this a component that comes with some kind of serial interface, or is it a simple button matrix - and if so, is it multiplexed? Please be as specific as possible - the more specific you are, the easier it is for us to help you.[/quote]

The answer to your question still depends on the answer to what I asked in my previous comment.
Did you take a look at the GPIOTE peripheral documentation and example that I referenced in my previous comment?

Best regards,
Karl

RE: I have to interface 4x4 keypad with nrf52840

nishant singh — Sat, 30 Oct 2021 10:09:35 GMT

Dear sir ,

how to initialize 4x4 keypad in ble_app_blinky project. and how to read and write.

RE: I have to interface 4x4 keypad with nrf52840

Karl Ylvisaker — Mon, 27 Sep 2021 12:44:33 GMT

Hello,

[quote user=""]I have to interface 4x4 keypad with nrf52840 [/quote]

Is this a component that comes with some kind of serial interface, or is it a simple button matrix - and if so, is it multiplexed? Please be as specific as possible - the more specific you are, the easier it is for us to help you.
Depending on your answer to the above question, but you can likely use the GPIOTE peripheral for this. A simple demonstration of the GPIOTE peripheral's usage is given in the Pin Change on Interrupt example from the SDK.

Best regards,
Karl