Need help Debugging UART Communication on NXP LPC1768 MCU

tanu500 — Tue, 12 Sep 2023 10:29:13 GMT

Hello NXP Community,

I'm working on an NXP LPC1768 MCU using the LPCOpen SDK for UART communication with a SparkFun Serial Basic Breakout (UART-to-USB converter) and an external GPS module. However, I'm consistently receiving gibberish data or no data at all when reading from the GPS module.

Here is the errors:

Hardware: LPC1768 UART0 connected to SparkFun Serial Basic Breakout, baud rate set to 9600 bps, and verified voltage levels.
Software: UART0 configured with LPCOpen SDK.
Issue: Receiving gibberish data or no data from GPS module.
Code Snippet:

// UART0 Configuration Chip_UART_Init(LPC_USART0); Chip_UART_SetBaud(LPC_USART0, 9600); // ...

I've tried troubleshooting but haven't found a solution.

Thanks in advance!

Re: Need help Debugging UART Communication on NXP LPC1768 MCU

Miguel04 — Wed, 13 Sep 2023 18:56:25 GMT

Hi @tanu500

Have you confirmed the correct functionality of the UART configuration and the uart-usb and GPS module?

Regarding the uart configuration, are you using an example from LPCOpen? if this is not the case please verify that the uart works and then use it with the modules.

Best Regards, Miguel.

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Need help Debugging UART Communication on NXP LPC1768 MCU

Re: Need help Debugging UART Communication on NXP LPC1768 MCU