Differences

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--- projects:series_00:electrical_tests:adapterboard [2016/06/16 08:38]
dieters
+++ projects:series_00:electrical_tests:adapterboard [2016/06/16 08:52]
dieters
@@ Line 6: / Line 6: @@
-The Adapterboard (sometimes also referred as Mainboard) comes mainly with two MAX 3232 UART and the 30-pin LVDS FPC Display connector. It serves as main interface to the Cubieboard with its 96-pin GPIO. The 96 GPIO-pins of the Cubieboard are split into two seperate connectors with 2x24 pins each, which is called "Cubieconnect". The corresponding two connectors on the Adapterboard come by default with 2x25 pins (this is not a bug, it is a matter of availability). Therefore it is important to align the connectors at the correct side or alternatively, cut the 2x25 into a 2x24 connector with a saw. The other components are usually not very critical. The Schottky diode must be checked for the correct polarity, as well as the 3.3 V voltage regulator TS2940. The are some photos out there showing the wrong orientation of the 3.3 V regulator, be careful and verify it before energizing. Further there is an Analog to Digital Converter ADS1110 (ADS1100 is also possible) on the Adapterboard, which is responsible for the battery voltage indication. The nominal Battery Voltage of 12 V is divided by R1 and R2 into 0.92 V and measured by the ADS1110, which is connected to the i2c-Bus, its address is 0x48. Tests can be made using i2cdetect. The scaling of the AD-Converters is made in the file /opt/conf/sensord.conf. Some Builders decide to use a [[touchscreen|Touchscreen]] as input device, others prefer a Remote Stick or Rotary Encoders and Pushbottons.
+The Adapterboard (sometimes also referred as Mainboard) comes mainly with two MAX 3232 UART and the 30-pin LVDS FPC Display connector. It serves as main interface to the Cubieboard with its 96-pin GPIO. The 96 GPIO-pins of the Cubieboard are split into two seperate connectors with 2x24 pins each, which is called "Cubieconnect". The corresponding two connectors on the Adapterboard come by default with 2x25 pins (this is not a bug, it is a matter of availability). Therefore it is important to align the connectors at the correct side or alternatively, cut the 2x25 into a 2x24 connector with a saw. The other components are usually not very critical. The Schottky diode must be checked for the correct polarity, as well as the 3.3 V voltage regulator TS2940. The are some photos out there showing the wrong orientation of the 3.3 V regulator, be careful and verify it before energizing. Further there is an Analog to Digital Converter ADS1110 (ADS1100 is also possible) on the Adapterboard, which is responsible for the battery voltage indication. The nominal Battery Voltage of 12 V is divided by R1 and R2 into 0.92 V and measured by the ADS1110, which is connected to the i2c-Bus, its address is 0x48. Tests can be made using i2cdetect. The scaling of the AD-Converters (ADS1100 uses the 3.3 V as external reference, whereas ADS1110 comes with a built-in reference of 2.048 V) is made in the file [[projects:series_00:software:sensord|/opt/conf/sensord.conf]]. Some Builders decide to use a [[touchscreen|Touchscreen]] as input device, others prefer a Remote Stick or Rotary Encoders and Pushbottons.
 ===== Test Points Adapterboard (without Display, Cubieboard and Sensorboard) =====