Peripheral Simulation

For Infineon C166 (all Variants) — A/D Converter (10 channels)

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.

Analog/Digital Converter Dialog

The Analog/Digital Converter dialog displays and allows you to edit the configuration of the A/D converter.

The Analog Digital Converter group contains the following controls.

• Mode displays and allows you to change the A/D Converter mode of operation.
• ADST is the A/C Converter start control flag.
• ADBSY is the busy flag. It indicates that a conversion is in progress.
• ADCIR is the A/D Converter interrupt request flag.
• ADEIR is the A/D Converter error interrupt request flag.
• ADCON is the A/D Converter Control Register (SFR).
• ADDAT is the A/D Converter Result Register (SFR).
• ADCH specifies the first A/D channel to convert.

The Analog Input Channels group contains an input box for each analog channel is displayed at the bottom of the dialog. These boxes display the current voltage for the channel. You may edit the value to specify a new input voltage for that channel. When the A/D Converter subsequently performs a conversion using that channel, the input voltage specified is converted into a digital value.

AINx VTREG
Data Type: float

The AINx VTREGs set the analog input voltages for simulated A/D converters. The AINx VTREGs represent the inputs to the analog input pins of the MCU for analog input 0, 1, 2, and so on. AIN0 sets the input voltage for analog input #0, AIN1 sets the input voltage for analog input #1, etc. If you have properly configured the analog inputs, the following commands (typed in the debugger's Command Window) input the voltages specified.

AIN0 = 0.000  /* Analog Input 0 = 0.000 volts */
AIN1 = 2.500  /* Analog Input 1 = 2.500 volts */
AIN2 = 4.999  /* Analog Input 2 = 4.999 volts */

You may create a debugger signal function to periodically change the value of the A/D input. The following signal function increases the A/D Channel 1 input voltage by 0.1 volts each second.

signal void AIN1_sig (void) {
float f;

for (f = 0.0; f < 5.0; f += 0.1)
  {
  swatch (1.0);                  // Delay 1 second
  AIN1 = f;                      // Set AIN1 Voltage
  }
}