ECEN 3213 Spring 2001 Lab Assignment #3

Lab 3 Simple I/O for translator
This lab is due at end of your assigned lab section during week of March 5. For this Lab use the M68HC11A8, which is the version diagramed in Figure 1.28 on page 24 of the Valvano book. The complete technical information is located on the Book’s CD in the file: D:\PDF\6811\HC11A8.pdf For all labs you are to bring your pre-lab design work, which may include diagrams, flow charts, Pseudo code, test case descriptions, and some text descriptions of the project. At the beginning of the lab, pick up your 3.5 inch disk from the previous. At the end of the lab turn in the disk with be all of your simulation files. This disk will be returned to you each lab to submit the results of that lab. Label the disk with your name, ECEN3213, and the meeting day and time for your lab. The files for the project should include at least the assembly program and the simulation results for your test cases. You must demonstrate correct (error free) assembly and at least one test case execution to the lab instructor before you submit your disk. Program requirements:
-Input 8 bits on PORT E that are either 2 BCD digits or one Seven Segment code(for seven segment code see table 8.7 on page 448 of Valvano). The handshake protocol listed below determines whether to consider the input as BCD or Seven Segment.
-Translate input from PORT E to a binary value.
-Save up to 100 translated binary values.
-Check for illegal input values.
-Count the number of values translated.
-Count the number of read bytes containing illegal inputs.
-Stop execution when then count of illegal reads his 255
-Wait for Dump and then a Reset-to-0 handshake when the number of translated values hits 100.
-output all (up to 100) stored values on the serial port, when the handshake protocol says to Dump values. Notice, the intent of this lab is to study I/O handshake protocol’s, therefore you do not need to put any simulator device to monitor the output on the serial port.
-Use PORT A and PORT B for the following handshake protocol:

Port A			Port B
a2	a1	a0	b7	b6	b5	b4	b3	b2	b1	b0	.
0	0	1	.	.	.	.	.	.	.	.	Port E ready to be read, and input values are 2 BCD digits
0	1	1	.	.	.	.	.	.	.	.	Port E ready to be read, and Input values are Seven Segment
1	0	1	.	.	.	.	.	.	.	.	Dump all Stored Values on serial port
x	x	0	.	.	.	.	.	.	.	.	No new data, and no action yet
1	1	1	.	.	.	.	.	.	.	.	Reset-to-0 all counts
.		.	.	.	.	.	.	.	0	1	Ready to read Port E
.	.	.	.	.	.	.	.	.	1	0	Finished reading port E
.	.	.	.	0	0	.	.	1	.	.	Error on Data Conversion
.	.	.	.	.	.	0	1	.	.	0	Serial Output of values in progress
.	.	.	.	.	.	1	0	.	.	.	Serial Output of values finished
.	.	.	.	0	1	.	.	0	.	.	BCD successfully converted and stored
.	.	.	.	1	0	.	.	0	.	.	Seven Segment successfully converted and stored
.	.	.	1	.	.	.	.	.	.	0	Number of stored values is 100.

Feel free to email comments and suggestions to John_M_Acken@acken.com