BBB-COMMS-2

Features

Extensive I/O connections

• (13) GPIOs - GVS (Ground/Voltage/Signal) pins
• (3) UARTs - GVTxRx (Ground/Voltage/Tx/Rx) pins
• (1) I2C bus- GVSdaScl (Ground/Voltage/SDA/SCL) pins
• Support for keyed headers
• Cape Support features
  • Cape configuration EEPROM with write enable jumper
• Beaglebone Black form factor
• Power LED

BBB-COMMS-2 Features Extensive I/O connections (13) GPIOs GVS (Ground/Voltage/Signal) pins (3) UARTs GVTxRx (Ground/Voltage/Tx/Rx) pins (1) I2C bus GVSdaScl (Ground/Voltage/SDA/SCL) pins Support for keyed header Cape Support features Cape configuration EEPROM with write enable jumper Beaglebone Black form factor Power LED Headers and Connectors BBB-COMMS-1-CAD-OSHPark-X1.png

Header H1 - Write Enable Header Install jumper onto header to allow writes to EEPROM Remove jumper from header to prevent writes to EEPROM Connectors H2-H9 = 4 Pin Headers Card Header GPIO BBB Pin H2-3 N/A N/A H2-4 (Key) No pin

N/A N/A H3-3 GPIO3_19 P9_27 H3-4 GPIO1_17 P9_23 H4-3 UART1_TX P9_24 H4-4 UART1_RX P9_26 H5-3 UART2_TX P9_21 H5-4 UART2_RX P9_22 H6-3 I2C_SDA P9_18 H6-4 I2C_SCL P9_17 H7-3 EHPWM1B P9_16 H7-4 GPIO1_16 P9_15 H8-3 EHRPWM1A P9_14 H8-4 GPIO1_28 P9_12 H9-3 UART4_TX P9_13 H9-4 UART4_RX P9_11 H10-H17 = 3 Pin Headers Card Header GPIO BBB Pin H10-3 (KEY) No pin

N/A N/A H11-3 GPIO1_29 P8_26 H12-3 GPIO2_1 P8_18 H13-3 GPIO0_27 P8_17 H14-3 GPIO1_14 P8_16 H15-3 GPIO1_15 P8_15 H16-3 GPIO1_12 P8_12 H17-3 GPIO1_13 P8_11 Production Testing Setup Install BBB-COMMS-2 on BBB Install shunt at H1 (Write Enable) Ethernet connection to BBB Power via 5V jack to BBB Verify 3.3V LED is lit Log in via putty User = root Password = enter GPIO Testing Hook up LED-32 Card to these pins D0 = "P8_26" D1 = "P8_17" D2 = "P8_15" D3 = "P8_11" D4 = "P9_23" D5 = "P9_26" D6 = "P9_22" D7 = "P9_15" D8 = "P9_12" D9 = "P9_11"

D16 = "P8_18" D17 = "P8_16" D18 = "P8_12" D19 = "P9_27" D20 = "P9_24" D21 = "P9_21" D22 = "P9_16" D23 = "P9_14" D24 = "P9_13" Run test via: cd ~/pyBBB/BBB-COMMS-2/blink-BBB-COMMS-2/ python blink-BBB-COMMS-2.py

I2C Testing/EEPROM Programming Go to directory Program the EEPROM Verify by typing cd ~/pyBBB/BBB-COMMS-2/mkeeprom cat data.eeprom > /sys/bus/i2c/devices/1-0054/eeprom cat /sys/bus/i2c/devices/1-0054/eeprom | hexdump -C

Result should be like - 00000000 aa 55 33 ee 41 30 42 42 42 2d 47 56 53 2d 33 00 |.U3.A0BBB-COMMS-| 00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |2...............| 00000020 00 00 00 00 00 00 58 31 00 00 4c 61 6e 64 20 42 |......X1..Land B| 00000030 6f 61 72 64 73 2c 20 4c 4c 43 42 42 42 2d 47 56 |oards, LLCBBB-CO| 00000040 53 2d 33 00 00 00 00 00 00 00 00 00 30 30 30 30 |MS-2........0000| 00000050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|

000000e0 00 00 00 00 00 00 00 00 00 00 00 00 00 fa 01 f4 |................| 000000f0 00 fa 00 00 ff ff ff ff ff ff ff ff ff ff ff ff |................| 00000100 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|

00008000 Remove WE jumper Type cat data.eeprom > /sys/bus/i2c/devices/1-0054/eeprom

Result should be error root@BBB01:~/pyBBB/BBB-COMMS-2/mkeeprom# cat data.eeprom > /sys/bus/i2c/devices/1-0054/eeprom cat: write error: Connection timed out Prepare to re-run Type halt Combined Copy/Paste cd ~/pyBBB/BBB-COMMS-2/blink-BBB-COMMS-2 python blink-BBB-COMMS-2.py

cd ~/pyBBB/BBB-COMMS-2/mkeeprom/ cat data.eeprom > /sys/bus/i2c/devices/1-0054/eeprom cat /sys/bus/i2c/devices/1-0054/eeprom | hexdump -C

BBB-COMMS-2 Assembly Sheet BBB-COMMS-2 Rev X1 Assembly Sheet Issues with X1 card TBD

BBB-COMMS-2 Assembly Sheet/Parts List

• BBB-COMMS-2 Rev X1 Assembly Sheet