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interrupts, large program, hang

Hi,

I have a problem with the interrupts, I am working with the LPC1768. In the main() function I have an infinite while() loop. In this loop is a complex program that analyzes data from the ADC. I use SysTick to periodically perform other tasks. Until this moment everything works fine. But if I get a UART interrupt then SysTick no longer works. Please help.

Regards,
Lukas

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