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#
# $Id$
#
Demonstrates the following Stimulation classes:
o SpiSink - monitors the /SS, SCLK and MISO pins and prints
each byte to stdout.
o SpiSource - drives the /SS, SCLK and MOSI pins with data from
the spidata file.
o PinMonitor - monitors Port A Bit 0 and prints changes in its
binary status to stdout.
o AdcPin - Stimulates Port F Bit 0 with the values contained
in the anadata file.
The AVR program alternately (every other byte) echoes the byte received
on the SPI or the ADCH value read from a recenet A/D converter, to the SPI.
The spidata file contains an HDLC encoded stream of *mostly* flags
that was used in my project at work. (We're running a form of
PPP/HDLC over SPI.)
The format of the spidata file consists of comments (lines
that start with a '#') and data lines. Each data line consists
of 3 values.
o First Value - the value (0 or non-zero)of /SS
o Second Value - the value (0 or non-zero) of SCLK
o Third Value - the value (0 or non-zero) of MOSI
When the SpiSource program stimulator reaches the end-of-file,
it rewinds and repeats ad-nauseum.
The anadata file contains analog data that that is read by the
AdcPin class and written to the Port F Bit 0 analog input of
the ATMega128.
The format of the anadata file consists of comments (lines
that start with a '#' character) and analog input lines.
Each input line consists of 2 values separated by whitespace.
o First Value - number of nano-seconds before the next value
is read and applied to the analog input.
o Second Value - signed integer "analogValue" to be applied
to the analog input.
To try it:
Step 1:
Configure and build the simulavr (simulavr.so in particular)
Step 2:
Build the AVR test program in this directory.
$ make
Step 3:
Run the test TCL script from this directory.
$ check.tcl
Step 4:
Marvel at the stdio activity.
Step 5:
Try modifying the spidata file and see the results.
What you'll see on stdout:
Note: Comments added on the right.
spisink: /SS asserted ; SPI /SS goes LOW (printed by SpiSink)
spisink: 0x00 ; 0x00 byte received on MISO from AVR (printed by SpiSink)
PORTA0: ASSERT ; Port A Bit 0 set low by AVR (printed by PinMonitor)
spisink: 0x00 ; Analog Data from AVR on SPI MISO
spisink: 0x02 ; echoed HDLC Data from AVR on SPI MISO
spisink: 0x99 ; Analog data from AVR on SPI MISO
spisink: 0xD3 ; echoed HDLC data from AVR on SPI MISO
spisink: 0x66 ; Analog data from AVR on SPI MISO
spisink: 0x7E ; echoed HDLC data from AVR on SPI MISO
spisink: 0x33 ; Analog data from AVR on SPI MISO
spisink: 0x7E ; echoed HDLC data from AVR on SPI MISO
...
...
spisink: 0x7E ; echoed HDLC data from AVR on SPI MISO
spisink: 0x04 ; Analog data from AVR on SPI MISO
spisink: /SS negated ; SPI /SS goes HIGH (printed by SpiSink)
spisink: /SS asserted ; SPI /SS goes LOW (printed by SpiSink)
spisink: 0x7E ; echoed HDLC data
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