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Changes for page Front I/O

Last modified by Kevin Wiki on 2024/07/07 22:48
From version 7.3
edited by Kevin Wiki
on 2024/07/05 09:31
Change comment: There is no comment for this version
To version 7.4
edited by Kevin Wiki
on 2024/07/05 10:16
Change comment: There is no comment for this version

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... ... @@ -194,7 +194,35 @@
194 194  * Power LED P3V3 - 3.30V
195 195  * Power LED - 0.87 V
196 196  
197 -
197 += Controlling top I/O LED =
198 +
199 +On the top row we have the following input/output devices in order from left to right;
200 +
201 +Left side:
202 +
203 +* physical lock
204 +* lock LED
205 +* warning/service button
206 +* warning/service LED
207 +* locate button
208 +* power LED (red & green)
209 +* fan LED (red & green)
210 +* temperature LED (red & green)
211 +* compute LED (unknown)
212 +
213 +Right side:
214 +
215 +* power LED (red & green)
216 +* fan LED (red & green)
217 +* temperature LED (red & green)
218 +* compute LED (unknown)
219 +
220 +Each side is driven by each their PCA9554 shift register. The registers represent the following LEDs: (Note that Lock LED is only present for the LEFT side)
221 +
222 +|=(% scope="row" %)Register|1|2|3|4|5|6|7
223 +|=Device|Power LED Green|Power LED Red|Fan LED Green|Fan LED Red|Temperature LED Green|Temperature LED Red|Lock LED
224 +
225 +To control each LED we shift either a 0 to turn off or 1 to turn on. Since each device shares a single red/green LED (power LED green & power LED red) setting both to 1 at the same time will always leave it red. That is when power LED green and power LED red are both enabled, red always takes precedence.
198 198  )))
199 199  
200 200