ICP DAS USA PEX-D24 User Manual

Also see for PEX-D24: Quick start guide

PIO/PEX-D24/D56 Series User Manual (Ver.3.1, Mar. 2015, PMH-005-31) 343.3.9 Read/Write 8-bit data Register(Read/Write):wBase+0xc0/0xc4/0xc8/0xd0/0xd4Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0D7 D6 D5 D4 D3 D2 D1 D0The PIO-D24/D56 and PEX-D24/D56 series contains 5/3 8-bit I/O ports, andeach I/O port can be configured as either a D/I or a D/O port. The user cansend/receive digital data to/from this register for digital input or output. Note thatall ports are set as D/I ports when the PC is first powered-on.outportb(wBase+0xc0,Val); /*Write to port-0 */Val=inportb(wBase+0xc0); /*Read from port-0*/outportb(wBase+0xcc,0x07); /*Set Port0~Port2 as DO port */outportb(wBase+0xc0,i1); /*Write to Port0 */outportb(wBase+0xc4,i2); /*Write to Port1 */outportb(wBase+0xc8,i3); /*Write to Port2 */outportb(wBase+0xcc,0x01); /*Set Port0 as DO port *//*port1~Port2 as DI port */outportb(wBase+0xc0,i1); /*Write to Port0 */j2=inportb(wBase+0xc4); /*Read Port1 */j3=inportb(wBase+0xc8); /*Read Port2 */L=inportb(wBase+0xd0); /*Read CON2 Low byte */H=inportb(wBase+0xd4); /*Read CON2 High byte */Val=(H<<8)+L ; /*Val is 16 bit data */outportb(wBase+0xd0,Val); /*Write to CON1 Low byte */outportb(wBase+0xd4,(Val>>8)); /*Write to CON1 high byte */Note: Make sure the I/O port configuration (DI or DO) before read/writethe data register (wBase+0xc0/0xc4/0xc8), refer to Sec.3.3.7 and Table3.3 for more information.!