@CHIP-RTOS C Library V2.00 - Hardware API
pfe_enable_bus
Initialize data bus I/O mask and ALE usage.
The I/O mask defines which data bits on the bus are inputs and which
are outputs. The mask bit for bi-directional data bus lines (read/write)
should be set to '1'.
void pfe_enable_bus ( unsigned short mask, unsigned char ale );
Parameters
mask
- Data bus mask
Bit 0 = 0: Data bus bit 0 is input, 1: is output
Bit 1 = 0: Data bus bit 1 is input, 1: is output
:
:
Bit 7 = 0: Data bus bit 7 is input, 1: is output
Bit 8..15 not used (for future extensions)
ale
- 0: Disable ALE, 1: Enable ALE
Return Value
- -- none --.
Comments
- Pins used:
ALE, AD[0..7], RD#, WR#
Excluded pins:
if ALE is used, then PCS0# is not available.
RTOS API
- This library function invokes a RTOS software interrupt.
Refer to this RTOS API function's
documentation
for more details.
This API List
List of C Libraries
@CHIP-RTOS Main Index
End of document
|