Peripheral Simulation

For Infineon C167CS-LM — Port 1 (2 x 8-bit I/O with Disable)

Simulation support for this peripheral or feature is comprised of:

• Dialog boxes which display and allow you to change peripheral configuration.
• VTREGs (Virtual Target Registers) which support I/O with the peripheral.

These simulation capabilities are described below.

Parallel Port 1 Dialog

This dialog displays the SFR and pins of Port 1. If this port is not used for the external multiplexed address bus, it may be used as a 16-bit general purpose I/O port. It is programmed and accessed as two 8-bit ports.

• P1H represents the P1H SFR. The HEX value and value of each bit is displayed and may be changed from this dialog.
• P1L represents the P1L SFR. The HEX value and value of each bit is displayed and may be changed from this dialog.
• DP1H is the port direction SFR for P1H. When DP1H.x=0, P1H.x is an input. When DP1H.x=1, P1H.x is an output.
• DP1L is the port direction SFR for P1L. When DP1L.x=0, P1L.x is an input. When DP1L.x=1, P1L.x is an output.
• Pins represents the states of the pins on the simulated MCU. When used as outputs, these have the same value as the P1H or P1L SFRs. When used as inputs you may set the level of the input pin to high (1) or low (0).

PORTxH/L VTREG
Data Type: unsigned char

The PORTxH and PORTxL VTREGs represent the I/O pins of the simulated MCU for Port 0 and Port 1. Most ports have a single VTREG (like PORT7 or PORT8) but some (like Port 0 and Port 1) have two VTREGs (PORT0H and PORT0L). You may read PORTxL or PORTxH to determine the state of the output pins of that port. For example, in the command window, you may type,

PORT0L

to obtain the value corresponding to the set pins of the lower 8 bits of Port 0. You may also change the input values of port pins by changing the value of the VTREG. For example,

PORT1H=0xF0

sets bits 4-7 and clears bits 0-3 of Port 1. You may use the bitwise operators AND(&), OR(|) and XOR(^) to change individual bits of the PORTx VTREGs. For example:

PORT1L |=  0x01;  /* Set P1L.0 Pin */
PORT0H &= ~0x02;  /* Clr P0H.1 Pin */
PORT0L ^=  0x80;  /* Toggle P0L.7 Pin */