Difference between revisions of "BBB-GVS-3"

Revision as of 12:48, 29 March 2022

Features

(19) GPIOs, GVS pins
- GVS pins
(3) UARTs, GVTxRx pins
- Gnd, Vcc, Tx, Rx 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

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

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

Cable set

Cables

LED-32 connections

Connect LED32-1 to LED-32 card
Connect LED32-21 to LED-32 card

BBB-GVS-3 connections

- Grounds cable does to GND pins on GVS
- Cable 1x8 3.3V side of translator to J12 to J19 SIG pins
- Cable 1x8 to Sig pins on 5.5V side of translator to 1x8 LED-32 marked 5V
- Cable 1x5 P20 goes to LED-32 card
- Cable 2x5 J1 goes to LED-32 card
- Cable 2x6 J6 goes to LED-32 card
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

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

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

BBB-GVS-3 Assembly Sheet

BBB-GVS-3 Rev X2 Assembly Sheet

@@ Line 188: / Line 188: @@
 === GPIO Testing ===
+==== Cable set ====
+* Cables
+===== LED-32 connections =====
 [[ FILE:BBB-GVS-3_TEST_P1841_720PX.jpg]]
-* Cable set
+* Connect LED32-1 to [[LED-32]] card
+* Connect LED32-21 to [[LED-32]] card
+===== BBB-GVS-3 connections =====
 ** Grounds cable does to GND pins on GVS
 ** Cable 1x8 3.3V side of translator to J12 to J19 SIG pins
@@ Line 231: / Line 241: @@
 # Common Ground
 </pre>
-Run test via:
+==== Run test ====
 <pre>
 cd ~/pyBBB/BBB-GVS-3/blink-BBB-GVS-3/src

Difference between revisions of "BBB-GVS-3"

Revision as of 12:48, 29 March 2022

Contents

Features

Connectors

P8, P9 Connectors

J11 - Write Enable (WE)

EEPROM Connections

Python pin assignments by header J number

Production Testing

Setup

I2C Testing/EEPROM Programming

Analog Testing

GPIO Testing

Cable set

LED-32 connections

BBB-GVS-3 connections

Run test

Prepare to re-run

Combined Copy/Paste

Issues with X2 card

Issues with X1 card

BBB-GVS-3 Assembly Sheet

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