Difference between revisions of "BBB-GVS-3"
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* (3) UARTs, GVTxRx pins | * (3) UARTs, GVTxRx pins | ||
** GVTxRx pins | ** GVTxRx pins | ||
| − | * (1) I2C bus, | + | * (1) I2C bus, G, V, SDA, SCL |
| − | ** | + | ** Ground, Voltage, SDA, SCL |
* (8) Channels of 3.3V to 5V level translators | * (8) Channels of 3.3V to 5V level translators | ||
** Use female to female jumpers to route the GPIO lines to the translator channels | ** Use female to female jumpers to route the GPIO lines to the translator channels | ||
** 5V side has GVS pins | ** 5V side has GVS pins | ||
* (7) 1.8V analog GVS connections with analog voltage/ground | * (7) 1.8V analog GVS connections with analog voltage/ground | ||
| − | ** Buffer | + | ** Buffer Opamps on the analog inputs |
* 5V pins are all ESD protected pins with 15 kV of protection | * 5V pins are all ESD protected pins with 15 kV of protection | ||
* Selectable 5V source (SYS_5V or VDD_5V) | * Selectable 5V source (SYS_5V or VDD_5V) | ||
Revision as of 22:18, 28 March 2022
Contents
Features
- (19) GPIOs, GVS pins
- GVS pins
- (3) UARTs, GVTxRx pins
- GVTxRx pins
- (1) I2C bus, G, V, SDA, SCL
- Ground, Voltage, SDA, SCL
- (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)
LEDs for 3.3V and 5V power
- Cape configuration EEPROM with write enable jumper
- Beaglebone Black form factor
Connectors
P8, P9 Connectors
Conn 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 J6_3 I2C1_SDA P9_18 J6_4 I2C1_SCL P9_17 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 - Write Enable (WE)
- Install for write enable
- Remove for write protect
EEPROM Connections
- The EEPROM connections are on I2C and have on-board pullup resistors.
- The connections are local to the card.
- The EEPROM part number is CAT24C256WI-GT3
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 Rev C BeagleBone Black card
- Install shunt at SYS on 5VSEL
- Install shunt at WE
- Ethernet connection to BBB
- Power via 5V jack to BBB
- Verify 5V and 3.3V LEDs are lit
- BBB are located on the Secondary net at:
- BBB Rev C - 192.168.2.109
- BBB Rev B - 192.168.2.110
- 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
- Label PROTOA12 plugs into resistor card with facing towards resistors
- Label on BBB-GVS-3 in Signal pin row facing
- May neee to run 2x
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
- Labels go towards the Ethernet connector side
- Port numbers marked
- Careful to not short power to ground
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
- Lights will circulate around the card in a ring
- CTRL-C to end test
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
- Remove 5V Power cable to power of card
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
