Its a code o C language to access the keypad of 48 keys on PIC controllers.

key scan\GPIO_TEST_LED_TOGGLE\Abstract.txt
........\....................\IOtest.c
........\....................\iotest.__i
........\....................\LED_TOGGLE.hex
........\....................\LED_TOGGLE.plg
........\....................\LED_TOGGLE.uvopt
........\....................\LED_TOGGLE.uvproj
........\....................\LED_TOGGLE_Target 1.dep
........\....................\LED_TOGGLE_uvopt.bak
........\....................\LED_TOGGLE_uvproj.bak
........\GPIO_TEST_LED_TOGGLE
key scan

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