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--- dseq32_matrix [2006/07/05 22:21] – created mess
+++ dseq32_matrix [2006/10/15 09:35] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
 This page will contain the information about the combined lcd/button matrix
+[[http://www.midibox.org/forum/index.php?topic=7087.0|forum topic]]<sup>uCApps</sup>
-right now I'm using a modified version of the sm_simple C example
+right now I'm using a modified version of the sm_simple C example\\
-but this code will be rewritten to make it more coherent
+this code will be rewritten to make it more coherent
+modifications to [[http://www.ucapps.de/mios/sm_example1_v2.zip|scan matrix example]] <sup>uCApps</sup>\\
+==== Hardware ====
+[[http://users.skynet.be/sky92755/DSEQ32_DOUT.pdf|DOUT wiring]]\\
+\\
+[[http://users.skynet.be/sky92755/DSEQ32_DIN.pdf|DIN wiring]]\\
+//*note: schematics not finished!//\\
+==== Software ====
+in main.c:\\
-modifications to scan matrix example:
-in main.c:
 <code>
 ...
@@ Line 27: / Line 37: @@
 ...
 </code>
+\\
 in sm_simple.asm:
 <code>
@@ Line 64: / Line 74: @@
 ...
 </code>
+\\
 and finally in sm_simple.h:
 <code>
@@ Line 74: / Line 84: @@
 </code>
+==== Appendum ====
+To avoid flickering leds when pushing a button
+the MIOS button debouncing should be turned off!!
+Due to the setup of the SRIO driver the debounce algoritm
+also delays the DOUT chain when a DIN event is being debounced.
+So when a button is pushed the led update frequency is reduced,
+the higher the debounce value, the lower the update frequency.
+According to this post TK will fix this in a future MIOS release:
+>This is something what I'm planning to solve in one of the next MIOS versions - currently the same SR scanning routine is used for DIN and DOUT registers, which means, >when the DINs are temporary disabled due to the cheap debouncing method, the DOUT registers won't be updated.
+\\
+>The solution is to add a second scan routine which only services the DOUTs so long the debouncing delay is active.
+\\
+In the meantime THIS ISSUE IS SOLVED WITH MIOS1.9c!!!
+== Workaround ==
+To turn the debouncing off, set
+<code>
+#define DIN_DEBOUNCE_VALUE    0
+</code>
+back to [[DSEQ32]]