LPC2212 EINT0 & EINT2 problems
2005-02-10 by emilpetrov
Hello! I have faced strange phenomemon when trying to use theese two external interrupt lines. I have connected dual uart 16C572 to the external bus and routed its INTA and INTB to the EINT0 and EINT2. After installing interrupt vectors in VIC and setting interrupts as high level sensitive I have discovered that there is alway interrupt pending and program cycles forever in interrupt handling routine. What is strange is that when setting interrupts as edge sensitive one of them start working fine but user manual said that using more than one edge sensitive interrupt will be "Programming error" !?!?! Is anyone met such a problem and solved it? Thanks in advance. Regards, Emil