OpenLab_siggen_ATMEL_imp.asciidoc

@@ -32,6 +32,26 @@ compiling for space(-Os), the firmware requires about 4700 bytes.
 
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+== Program Flow
+
+The task of the firmware is simple. It listens for offset-packets on the connection and controls the
+DAC according to the values therein. Since the communication is stateless and connectionless,
+there is not much further logic involved. Figure 2 below, shows the program flow of the firmware
+as it is implemented in the _Main_ module.
+
+{empty} +
+
+image::https://es.technikum-wien.at/openlab/openlab_wiki/wikis/img/OpenLab_siggen_atmel_imp/Siggen_atmel_flowchart.PNG[caption="Figure 2: ",title="Firmware structure",height=350,align="center"]
+
+{empty} +
+
+It can be seen that the firmware is passive and only communicates if requested, making the
+amplifier device the slave. Unknown data is ignored, while invalid packets are negative acknowledged.
+In the following section more information about the communication protocol can
+be found.
+
+{empty} +
+
 == Bibliography +
 
 The content of his chapter is taken from the master thesis "_Development of a Sound Card Based Arbitrary Waveform Generator_" by Jakob Kriegbaum, MSc, May 2017.