BBB-GVS-3
Contents
BBB-GVS-3
Features
Extensive I/O connections:
- (19) GPIOs
- GVS pins
- (3) UARTs
- GVTxRx pins
- (1) I2C bus
- GVSdaSck
- (8) Channels of 3.3V to 5V level translators
- Use female to female jumpers to route the GPIO lines to the translator channels
- 5V side has GVS pins
- (7) 1.8V analog GVS connections with analog voltage/ground
- Buffer opamps on the analog inputs
- 5V pins are all ESD protected pins with 15 kV of protection
- Selectable 5V source (SYS_5V or VDD_5V)
- Cape configuration EEPROM with write enable jumper
- Beaglebone Black form factor
Connectors
Card Header | GPIO | BBB Pin |
---|---|---|
J1 | SPI1_D1 | P9_30 |
J2 | GPIO3_19 | P9_27 |
J3_3 | UART1_RX | P9_26 |
J3_4 | UART1_TX | P9_24 |
J4 | GPIO1_17 | P9_23 |
J5_3 | UART2_TX | P9_21 |
J5_4 | UART2_RX | P9_22 |
J7 | GPIO1_16 | P9_15 |
J8_3 | UART4_TX | P9_13 |
J8_4 | UART4_RX | P9_11 |
J9 | EHRPWM1A | P9_14 |
J10 | GPIO1_28 | P9_12 |
J12 | GPIO1_29 | P8_26 |
J13 | EHRPWM2A | P8_19 |
J14 | GPIO2_1 | P8_18 |
J15 | GPIO0_27 | P8_17 |
J16 | GPIO1_14 | P8_16 |
J17 | GPIO1_15 | P8_15 |
J18 | EHRPWM2B | P8_13 |
J19 | GPIO1_12 | P8_12 |
J20 | GPIO1_13 | P8_11 |
J21 | TIMER5 | P8_09 |
J22 | TIMER6 | P8_10 |
J23 | TIMER4 | P8_07 |
J24 | TIMER7 | P8_08 |
J11 - WE
- GND
- VCC
- WE
Python pin assignments by header J number
J1 = "P9_30" # GR-1 - D0 J2 = "P9_27" # BL-1 - D16 J3_3 = "P9_26" # VI-1 - D1 J3_4 = "P9_24" # GY-1 - D17 J4 = "P9_23" # WH-1 - D2 J5_3 = "P9_21" # BL-1 - D18 J5_4 = "P9_22" # BR-2 - D3 J7 = "P9_15" # RD-2 - D19 J8_3 = "P9_13" # OR-2 - D4 J8_4 = "P9_11" # YL-2 - D20 J9 = "P9_14" # GR-2 - D5 J10 = "P9_12" # BU-2 - D21 J20 = "P8_11" # VI-2 - D6 J21 = "P8_9" # GY-2 - D22 J22 = "P8_10" # WH-2 - D7 J23 = "P8_7" # BL-2 - D23 J24 = "P8_8" # BR-3 - D8 J12 = "P8_26" # RD-3 - D24 J13 = "P8_19" # OR-3 - D9 J14 = "P8_18" # YL-3 - D25 J15 = "P8_17" # GR-3 - D10 J16 = "P8_16" # BU-3 - D26 J17 = "P8_15" # VI-3 - D11 J18 = "P8_13" # GY-3 - D27 J19 = "P8_12" # WH-3 - D12
Production Testing
Setup
- Install BBB-GVS-3 on BBB
- Install shunt at SYS on 5VSEL
- Install shunt at WP
- Ethernet connection to BBB
- Power via 5V jack to BBB
- Verify 5V and 3.3V LEDs are lit
- Log in via putty
- User = root
- Password = enter
Analog Testing
- Connect GRID49 card with resistor ladder
- (8) 10K resistors
- From 1.8V to all 7 inputs to ground
- Input in 1/8 steps
- Run analog ladder code
cd ~/pyBBB/BBB-GVS-3/analogLadder python analogLadder.py
- Pass/Fail message will be displayed
val0 0.625 val1 0.125 val2 0.75 val3 0.248888894916 val4 0.498888880014 val5 0.372777789831 val6 0.875 PASS - Analog values match expected ladder values
GPIO Testing
- Hook up LED-32 Card to these pins
D0 = "P9_30" # GR-1 - D0 D1 = "P9_26" # VI-1 - D1 D2 = "P9_23" # WH-1 - D2 D3 = "P9_22" # BR-2 - D3 D4 = "P9_13" # OR-2 - D4 D5 = "P9_14" # GR-2 - D5 D6 = "P8_11" # RD-3 - D6 D7 = "P8_10" # YL-3 - D7 D8 = "P8_8" # BU-3 - D8 D9 = "P8_19" # GY-3 - D9 D10 = "P8_17" # VI-2 - D10 D11 = "P8_15" # WH-2 - D11 D12 = "P8_12" # BR-3 - D12 D27 = "P8_13" # BL-2 - D27 D26 = "P8_16" # GY-2 - D26 D25 = "P8_18" # WH-3 - D25 D24 = "P8_26" # VI-3 - D24 D23 = "P8_7" # GR-3 - D23 D22 = "P8_9" # OR-3 - D22 D21 = "P9_12" # BU-2 - D21 D20 = "P9_11" # YL-2 - D20 D19 = "P9_15" # RD-2 - D19 D18 = "P9_21" # BL-1 - D18 D17 = "P9_24" # GY-1 - D17 D16 = "P9_27" # BL-1 - D16 # Common Ground
- Run test via:
cd ~/pyBBB/BBB-GVS-3/blink-BBB-GVS-3/src python blink-BBB-GVS-3.py
I2C Testing/EEPROM Programming
- Go to directory
- Program the EEPROM
- Verify by typing
cd ~/pyBBB/BBB-GVS-3/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-GVS-3.| 00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 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-GV| 00000040 53 2d 33 00 00 00 00 00 00 00 00 00 30 30 30 30 |S-3.........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-GVS-3/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-GVS-3/mkeeprom cat data.eeprom > /sys/bus/i2c/devices/1-0054/eeprom cat /sys/bus/i2c/devices/1-0054/eeprom | hexdump -C cd ~/BBB/BBB-GVS-3/analogLadder python analogLadder.py cd ~/pyBBB/BBB-GVS-3/blink-BBB-GVS-3/src python blink-BBB-GVS-3.py halt
Issues with X2 card
- No known or reported issues
Issues with X1 card
- WP jumper should be WE
- EEPROM A3 s/b high not low
- Cut etch to U1-3
- Add wire U1-3 to U1-8