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Changes for page Front I/O

Last modified by Kevin Wiki on 2024/07/07 22:48
From version 3.3
edited by Kevin Wiki
on 2024/07/04 23:07
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To version 2.2
edited by Kevin Wiki
on 2024/07/04 17:53
Change comment: There is no comment for this version

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6 6  
7 7  There is a single cable that controls four parts, each half side of I/O LED and center column of blue LEDs.
8 8  
9 -[[image:xserve io main cable pinout.drawio.png]]
9 +== Sub-paragraph ==
10 10  
11 -(% class="wikigeneratedid" %)
12 -[[attach:xserve io main cable pinout.drawio.svg||target="_blank"]]
11 +Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
13 13  
13 +== Sub-paragraph ==
14 +
15 +Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
16 +
17 +=== Sub-sub paragraph ===
18 +
19 +Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
20 +
21 +
14 14  = How we got here =
15 15  
16 16  Measure out the ground and power signals by comparing with other chips on board. E.g. we find [SAA1064T] datasheet, locate the GND (Vee) and 5V (Vcc) and measure connectivity (0 ohm resistance) between chip pins and cable pins. This gives us pins GND 2 & 8 and PWR 16 & 22.
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143 143  }
144 144  {{/code}}
145 145  
146 -== SAA1064T data for driving center IO LED stack ==
147 -
148 -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.
149 -
150 -{{code language="C++"}}
151 -void fillColumns() {
152 - Serial.println("filling columns");
153 - Wire.beginTransmission(saa1064);
154 - Wire.write(1);
155 - Wire.write(0x7F); // 127 - 1111111
156 - Wire.write(0x7F); // 127 - 1111111
157 - Wire.write(0x7F); // 127 - 1111111
158 - Wire.write(0x1F); // 31 - 11111
159 - Wire.endTransmission();
160 -
161 - colsFilled = 1;
162 -}
163 -{{/code}}
164 -
165 -(% class="wikigeneratedid" %)
166 -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.
167 -
168 168  == Pinouts voltages from MLB ==
169 169  
170 170  Powered off:
171 171  
172 172  * PWR fail LED - 0.00 V
173 -* UID LED - 4.5V
174 174  * OH/Fan fail LED - 4.72 V
175 175  * NIC1 LED - 0.8 - 2.6 V
176 176  * NIC2 LED - 2.95 V
177 -* UID SW - 2.8V
178 178  * HDD LED - 0.00 V
179 -* Power LED P3V3 - 0.00V
180 180  * Power LED - 0.00 V after unplug grows
181 181  
182 182  Powered on:
183 183  
184 184  * PWR tail LED - 3.47 V
185 -* UID LED - 4.85V
186 186  * OH/Fan failed LED - 5 V
187 187  * NIC 1 LED - 1.2 - 2.9 V
188 188  * NIC 2 LED - 3.2 V
189 -* UID SW - 3V
190 190  * HDD LED - 3 V
191 -* Power LED P3V3 - 3.30V
192 192  * Power LED - 0.87 V
193 193  
174 +
194 194  
195 195  )))
196 196  
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212 212  
213 213  
214 214  
215 -
216 216  )))
217 217  )))
xserve io main cable pinout.drawio.png
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1 -XWiki.kevin
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1 -41.4 KB
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xserve io main cable pinout.drawio.svg
Author
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1 -XWiki.kevin
Size
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1 -41.4 KB
Content