LPC55S16 Keypad Port (KPP), where to find sample code and document?

[felix1]

Hi, 

According to https://www.nxp.com.cn/docs/zh/training-reference-material/TIP-NXP-MICROPROCESSOR-1.pdf

p.31, 

LPC55S16 supports

"Keyboard:
✓ Enabled unique EZH HW accelerator for up to 128 (8*16) key scan."

 Where to find the sample code and document for this HW keypad usage for LPC55S16?

[tanu500]

Hello,

As per my knowledge, you can find sample code and documentation for using the Keypad Port (KPP) on the LPC55S16 microcontroller:

1. Visit NXP's LPC55S16 product page on their official website.- https://www.nxp.com/design/software/development-software/mcuxpresso-software-and-tools-/lpcxpresso-b...salesforce admin certification
2. Look for the LPC55S16 reference manual for detailed information.
3. Check for LPC55S16-specific SDKs and software libraries, which often include example code and documentation.
4. Explore NXP's online forums and communities for community-contributed code and solutions.
5. Search for application notes related to LPC55S16 and KPP.
6. Check NXP's GitHub repositories for code samples and projects.
7. Reach out to NXP's customer or technical support for assistance if needed.

[ZhangJennie]

HI @felix1 

We don't have EZH Keypad demo code. 

We only have rotary encoder ezh demo application which is included in MCUXpresso SDK .

rotary_encoder_ezh

Hope this will help you,

Jun Zhang

[felix1]

Hi,

1) Can you classify LPC55S16 have Keypad Port (KPP) HW like RT1050 MCU or not? 

    I can not find KPP section in LPC55S16 datasheet.

2) The example "rotary_encoder_ezh" in which directory of the LPC SDK? 

    I can not find this LPC example.

[ZhangJennie · Accepted solution]

Hi

LPC55S16 doesn't have keypad. Technically EZH can emulate it but we don't have demo code.

The demo is under SDK.

Have a nice day,

Jun Zhang

[felix1]

Hi,

I can not find this example in SDK 2.9.1, can you check it?

[ZhangJennie]

Hi

This demo exists on my side.

When download, please select "all toolchains" and "select all". check again

Thanks,

Jun Zhang

[felix1]

The example "rotary_encoder_ezh" is not in SDK 2.14.0, it seems just in SDK 2.9.1 and keil project type only.

[ZhangJennie]

Hi felix1 

Yes, you are right. rotary_encoder_ezh is not included in SDK2.14 for LPCXpresso55S16. But it is included in SDK2.14 for LPCXpresso55S69

Have a nice day,

Jun Zhang