Implementing UART Communication on NXP LPC Microcontrollers - Emmanuel Katto

[emmanuelkatto23]

Hello everyone,

My name is Emmanuel Katto. I'm currently working on a project using the NXP LPC1768 microcontroller, and I need to implement UART communication to interface with a GPS module. I've read through the reference manual and some application notes, but I’m seeking advice on the best practices when setting up and using UART on this MCU.

• What are the essential settings I should configure for UART (baud rate, data bits, stop bits, parity)? Are there any specific settings recommended for a GPS module?

• What is the best way to handle incoming and outgoing data buffers in terms of size and management? Should I use interrupts to manage data reception, and if so, what are the best practices for implementing the ISR?

Thank you in advance for your assistance!

Best,

Emmanuel Katto

[xiangjun_rong]

Hi,

As you know that the uart communication reliability is dependent on the uart driving clock accuracy. The internal IRC clock frequency is not accurate and subject to temperature.

I suggest you use external clock osc_clk as the source of uart clock.

So I suggest you connect an external crystal clock(osc_clk), use PLL to times it or directly use osc_clk as pllclk. you can use the pclkx to generate the uart baud rate.

Hope it can help you

BR