Key-driven hardware operation implementation

First go to open the bare metal driver key code BUTTON.C:1) key initialization---the choice of gpio function is external interrupt, the initialization of this hardware should be placed under the development of Linux where? A, in the Open function, B, in the initialization of the module. Choose one.

The corresponding interrupt mode:

Processing of interrupt numbers

In the Sourceinsight project, enter irqs.h-> to find the s3c64xx-> open and find similar to # define IRQ_EINT0 s3c6410....-> open Entry-macro-s (6410)- > Have a get_irqnr_and_base,irqnr,irqstat,basetmp-> find Irqnr source->intoffset The actual physical interrupt with the corresponding serial number will produce an ordinal In Linux, the interrupt number is ordinal (the value in register Intoffset) + a cardinality

There is a problem!!

Key-driven hardware operation implementation