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Changes for page Front I/O

Last modified by Kevin Wiki on 2024/07/07 22:48
From version 2.2
edited by Kevin Wiki
on 2024/07/04 17:53
Change comment: There is no comment for this version
To version 1.3
edited by Kevin Wiki
on 2024/07/04 13:31
Change comment: There is no comment for this version

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94 94  
95 95  We have two sets of chips, one for left and one for right where we have two different i2c chips on each side for controlling lights. Since the chips controlling their respective parts have the same address for each side, we can't distinguish them from each other. To handle this we use a i2c multiplexer to selectively communicate with one half at a time, switching TCA9548 between two different output ports.
96 96  
97 +
97 97  === Code example finding i2c ports ===
98 98  
99 99  To verify wiring, connection, output ports and device addresses run the following script:
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150 150  {
151 151  }
152 152  {{/code}}
153 -
154 -== Pinouts voltages from MLB ==
155 -
156 -Powered off:
157 -
158 -* PWR fail LED - 0.00 V
159 -* OH/Fan fail LED - 4.72 V
160 -* NIC1 LED - 0.8 - 2.6 V
161 -* NIC2 LED - 2.95 V
162 -* HDD LED - 0.00 V
163 -* Power LED - 0.00 V after unplug grows
164 -
165 -Powered on:
166 -
167 -* PWR tail LED - 3.47 V
168 -* OH/Fan failed LED - 5 V
169 -* NIC 1 LED - 1.2 - 2.9 V
170 -* NIC 2 LED - 3.2 V
171 -* HDD LED - 3 V
172 -* Power LED - 0.87 V
173 -
174 -
175 -
176 176  )))
177 177  
178 178  
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187 187  
188 188  [[image:[email protected]]]
189 189  //Figure 2: [[Waves>>https://commons.wikimedia.org/wiki/File:Culebra_-_Playa_de_Flamenco.jpg]]//
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196 196  )))
197 197  )))