Aplex Technology ACS-2645 User Manual
Page 53
ACS-2645 User Manual
53
outportb(0x4E, 0x30); //Logic device activation control
outportb(0x4F, (inportb(0x4F)|0x4));
//Set bit[2] to enable GPIO Port6 if LDN=8
Configure GPIO register
Example x86 assembly code:
mov dx, 4Eh
mov al, 0E6h ;GPIO inversion reg.
out dx, al
mov dx, 4Fh
mov al, 000h ;0
– normal, 1 - inverted
out dx, al
mov dx, 4Eh
mov al, 0E4h ;GPIO I/O selection reg.
out dx, al
mov dx, 4Fh
mov al, 0FFh ;0
– Output, 1 – Input
;or mov al, 0F0h to set output
out dx, al
Example C code:
outportb(0x4E, 0xE6); //GPIO I/O selection reg.
outportb(0x4F, 0x0); //0
– normal, 1 – inverted
outportb(0x4E, 0xE4); //GPIO inversion reg.
outportb(0x4F, 0xFF); //0
– Output, 1 - Input
or
outportb(0x4E, 0xE4); //GPIO inversion reg.
outportb(0x4F, 0xF0); //0
– Output, 1 – Input
Read GPIO value
Example x86 assembly code:
mov dx, 4Eh
mov al, 0E5h ;GPIO data reg.
out dx, al
mov dx, 4Fh
in al, dx ;Bit[3::0] = GPI[3::0] value
Example C code:
outportb(0x4E, 0xE5); //GPIO data reg.