InetrfaceProducts NXP / parallel_bus

Parallel bus (address 8 bit, data 8 bit) access sample using GPIO pins.

Dependents:   mini_board_PCU9669_demo mini_board_PCU9669

Parallel bus emulation sample code

mbed (LPC1768) does not have parallel bus but it can be emulated by GPIO.
Please find a notebook page for more infomation.

/media/uploads/nxp_ip/parallel-block-diagram.png

/media/uploads/nxp_ip/parallel_access_opt.png

Diff: hardware_abs.c

Revision:
5:8b54fb7ecfff
Parent:
4:2b277209c3e6
Child:
6:3f4c439ea51b
--- a/hardware_abs.c	Thu Jul 12 06:06:43 2012 +0000
+++ b/hardware_abs.c	Mon Aug 27 03:44:52 2012 +0000
@@ -268,6 +268,8 @@
         LPC_GPIO2->FIOCLR   = 0x28; //  to keep timing
         LPC_GPIO2->FIOCLR   = 0x28; //  to keep timing
         LPC_GPIO2->FIOCLR   = 0x28; //  to keep timing
+        LPC_GPIO2->FIOCLR   = 0x28; //  to keep timing
+        LPC_GPIO2->FIOCLR   = 0x28; //  to keep timing
 
         *(data + i)         = (LPC_GPIO0->FIOPIN >> 4) & 0xFF;      //  Read data bus into var
         LPC_GPIO2->FIOSET   = 0x08;