Skip to Content

Changes for page Front I/O

Last modified by Kevin Wiki on 2024/07/07 22:48
From version 1.4
edited by Kevin Wiki
on 2024/07/04 16:49
Change comment: There is no comment for this version
To version 3.1
edited by Kevin Wiki
on 2024/07/04 22:57
Change comment: There is no comment for this version

Summary

Details

Page properties
Content
... ... @@ -150,6 +150,56 @@
150 150  {
151 151  }
152 152  {{/code}}
153 +
154 +== SAA1064T data for driving center IO LED stack ==
155 +
156 +Center IO stack is a stack of 23 LED's, 22 blue and 1 green for ethernet activity. These are duplicated next to each other and driven by each their SAA1064T chips. Earlier we found the i2c address and just by playing around figured out that 4 segments of 1 byte binary values are used to set ship register.
157 +
158 +{{code language="C++"}}
159 +void fillColumns() {
160 + Serial.println("filling columns");
161 + Wire.beginTransmission(saa1064);
162 + Wire.write(1);
163 + Wire.write(0x7F); // 127 - 1111111
164 + Wire.write(0x7F); // 127 - 1111111
165 + Wire.write(0x7F); // 127 - 1111111
166 + Wire.write(0x1F); // 31 - 11111
167 + Wire.endTransmission();
168 +
169 + colsFilled = 1;
170 +}
171 +{{/code}}
172 +
173 +(% class="wikigeneratedid" %)
174 +Here the last byte we send only is 5 bits since we only have 5 LEDs instead of 6 to address (total of 23). Also note that we start the transmission with a single bit.
175 +
176 +== Pinouts voltages from MLB ==
177 +
178 +Powered off:
179 +
180 +* PWR fail LED - 0.00 V
181 +* UID LED - 4.5V
182 +* OH/Fan fail LED - 4.72 V
183 +* NIC1 LED - 0.8 - 2.6 V
184 +* NIC2 LED - 2.95 V
185 +* UID SW - 2.8V
186 +* HDD LED - 0.00 V
187 +* Power LED P3V3 - 0.00V
188 +* Power LED - 0.00 V after unplug grows
189 +
190 +Powered on:
191 +
192 +* PWR tail LED - 3.47 V
193 +* UID LED - 4.85V
194 +* OH/Fan failed LED - 5 V
195 +* NIC 1 LED - 1.2 - 2.9 V
196 +* NIC 2 LED - 3.2 V
197 +* UID SW - 3V
198 +* HDD LED - 3 V
199 +* Power LED P3V3 - 3.30V
200 +* Power LED - 0.87 V
201 +
202 +
153 153  )))
154 154  
155 155  
... ... @@ -164,5 +164,12 @@
164 164  
165 165  [[image:[email protected]]]
166 166  //Figure 2: [[Waves>>https://commons.wikimedia.org/wiki/File:Culebra_-_Playa_de_Flamenco.jpg]]//
217 +
218 +
219 +
220 +
221 +
222 +
223 +
167 167  )))
168 168  )))