Peripheral Simulation

For Infineon XC888C-8FF — Port 1

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. This port has several alternate functions but it may be used as a 8-bit general purpose I/O port.

• P1_DATA represents the P1 SFR. The HEX value and value of each bit is displayed and may be changed from this dialog.
• P1_DIR is the port direction SFR for P1_DATA. When P1_DIR.x=0, P1_DATA.x is an input. When P1_DIR.x=1, P1_DATA.x is an output.
• P1_OD is the open drain control SFR for P1_DATA. When P1_OD.x=0, the P1_DATA.x output driver works in push/pull mode. When P1_OD.x=1, the P1_DATA.x output driver works in open drain mode.
• P1_PUDSEL selects a pull-up or pull-down device for each pin in P1_DATA. When P1_PUDSEL.x=0, P1_DATA.x is pulled down. When P1_PUDSEL.x=1, P1_DATA.x is pulled up(default).
• P1_PUDEN enables a pull-up or pull-down devices for each pin in P1_DATA. When P1_PUDEN.x=0, P1_PUDSEL.x is disabled. When P1_PUDEN.x=1, P1_PUDSEL.x is enabled.
• P1_ALTSEL0 selects the general purpose I/O, Alternate Output 1.
• P1_ALTSEL1 selects the general purpose I/O, Alternate Output 2.
• Pins represents the states of the pins on the simulated MCU. When used as outputs, these have the same value as the P1_DATA SFR. When used as inputs (P1_DIR.x is 0) you may set the level of the input pin to high (1) or low (0).

PORTx VTREG
Data Type: unsigned char

The PORTx VTREGs represent the I/O pins of the simulated MCU for Port 0, Port 1, and so on. PORT0 represents Port 0, PORT1 represents Port 1, etc. You may read PORTx to determine the state of the output pins of that port. For example, in the command window, you may type,

PORT0

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

PORT1=0xF0

sets the upper four port pins of Port 1 to a value of 1 and the lower 4 port pins to a value of 0. You may use the bitwise operators AND(&), OR(|) and XOR(^) to change individual bits of the PORTx VTREGs. For example:

PORT1 |=  0x01;  /* Set P1.0 Pin */
PORT3 &= ~0x02;  /* Clr P3.1 Pin */
PORT1 ^=  0x80;  /* Toggle P1.7 Pin */