rpc2a-000-dil Radiometrix Ltd, rpc2a-000-dil Datasheet - Page 23

• Manufacturer Part Number: rpc2a-000-dil
• Description: Uhf Radio Packet Controller
• Manufacturer: Radiometrix Ltd

Example RPC2A driver subroutines for Motorola 68HC11
Packet transfers to / from the RPC2A are best handled in the host by two subroutines :- OUT_BYTE &
IN_BYTE
Additionally LISTEN_BUS is called on completion of a packet transfer to the RPC2A to return the data
bus to inputs (default state).
*********************************************************************
*
* CPU REGISTER EQUATIONS
*********************************************************************
*
*This section contains a few of the necessary register equations used
*in the example subroutines.
PORTC
DDRC
* Port-C7 = RX-accept
* Port-C6 = RX-request INPUT
* Port-C5 = TX-accept
* Port-C4 = TX-request OUTPUT
* Port-C3 = RPC2A data bit-3
* Port-C2 = RPC2A data bit-2
* Port-C1 = RPC2A data bit-1
* Port-C0 = RPC2A data bit-0
Radiometrix Ltd, RPC2A
figure 17: RPC2A to HC11 -C interface
PPENDIX
RPC2A
EQU
EQU
RXA
TXA
TXR
RXR
D0
D1
D2
D3
$1003
$1007
OUTPUT
INPUT
;ADDRESS OF RPC2A PORT
;DATA DIRECTION REGISTER PORT-C
PC3
PC2
PC1
PC0
PC7
PC6
PC5
PC4
HOST
HC11
IRQ
*
page 23