Add some more MIDI dumps.

[sigrok-dumps.git] / uart / midi / artifically_generated / README

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+-------------------------------------------------------------------------------
+Artifically Generated Data
+-------------------------------------------------------------------------------
+
+This data was generated by hand based off of various specifications:
+
+ - "The Complete MIDI 1.0 Detailed Specification" version 96.1
+ - "General MIDI System Level 1" revision 4
+ - "General MIDI 2" version 1.2a
+
+
+Logic analyzer setup
+--------------------
+
+Not applicable.
+
+
+Data
+----
+
+The data was initially created as CSV files with one column composed of only
+1s and 0s of UART data. These CSV files were then imported into sigrok's GUI,
+PulseView. When importing the CSV files, the samplerate was set to 100000
+(i.e. 100kHz). Each byte value was visually verified for correctness.
+The data was then resaved as *.sr files.
+
+Since MIDI communicates at 31250 bits/sec in 8N1 format, each byte of UART
+data used 37 rows of data in the CSV file when using a sampling rate of
+100kHz. Listed from top to bottom, the rows in the CSV for each byte were:
+
+    1.  Three rows of "1" as padding before the bits
+    2.  Three rows of "0" as the start bit
+    3.  Three rows of the data bytes bit0 (lsb)
+    4.  Three rows of the data bytes bit1
+    5.  Three rows of the data bytes bit2
+    6.  Four rows of the data bytes bit3
+    7.  Three rows of the data bytes bit4
+    8.  Three rows of the data bytes bit5
+    9.  Three rows of the data bytes bit6
+    10. Three rows of the data bytes bit7 (msb)
+    11. Three rows of "1" as the stop bit
+    12. Three rows of "1" as padding after the bits
+