Keil Logo

Peripheral Simulation

For Atmel T87C251G1A — SPI Interface

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.

SPI Dialog

SPI

SPI_CLK VTREG
Data Type: unsigned long

SPI_IN VTREG
Data Type: unsigned int

The SPI_IN VTREG contains a byte which is received via the MCU SPI (Serial Peripheral Interface) port on the next SPI transfer. You may use this VTREG in a simulation script. For example:

signal void spi_func (void) {
while (1) {
  wwatch (SPI_OUT);
  printf ("SPI_OUT: %2.2X\n", (unsigned) SPI_OUT);
  SPI_IN = SPI_OUT + 1;
  }
}

This signal function returns the SPI byte send plus 1 on the next SPI transfer.

SPI_OUT VTREG
Data Type: unsigned int

The SPI_OUT VTREG contains a byte output via the MCU SPI (Serial Peripheral Interface) port. When your simulated program sends a byte via SPI, the SPI_OUT VTREG is set with the value output. You may monitor this VTREG in a simulation script. For example:

signal void spi_watcher (void) {
while (1) {
  wwatch (SPI_OUT);
  printf ("SPI_OUT: %2.2X\n", (unsigned) SPI_OUT);
  }
}
Get more information about the
Peripheral Simulation Capabilities
of the µVision Debugger.
  Arm logo
Important information

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies.

Change Settings

Privacy Policy Update

Arm’s Privacy Policy has been updated. By continuing to use our site, you consent to Arm’s Privacy Policy. Please review our Privacy Policy to learn more about our collection, use and transfers
of your data.