Difference between revisions of "RASPI-PLUS-GVS-CFG"

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The following are all 3.3VDC connections.
 
The following are all 3.3VDC connections.
  
Raspberry Pi B Plus GPIO Connector
+
=== Raspberry Pi B Plus GPIO Connector ===
J8 on the Pi.
 
  
Bplus-gpio-edited.png
+
* J8 on the Pi.
  
I2C bus
+
[[File:Bplus-gpio-edited.png]]
GND
+
 
3.3V
+
==== I2C bus ====
SDA
+
 
SCL
+
# GND
UART I/F
+
# 3.3V
GND
+
# SDA
3.3V
+
# SCL
TxD
+
 
RxD
+
==== UART I/F ====
IO_4 GVS
+
 
GND
+
# GND
3.3V
+
# 3.3V
GPIO_4
+
# TxD
IO_18 GVS
+
# RxD
GND
+
 
3.3V
+
==== IO_4 GVS ====
GPIO_18
+
 
IO_17 GVS
+
# GND
GND
+
# 3.3V
3.3V
+
# GPIO_4
GPIO_17
+
 
IO_27 GVS
+
==== IO_18 GVS ====
GND
+
 
3.3V
+
# GND
GPIO_27
+
# 3.3V
IO_23 GVS
+
# GPIO_18
GND
+
 
3.3V
+
==== IO_17 GVS ====
GPIO_23
+
 
IO_22 GVS
+
# GND
GND
+
# 3.3V
3.3V
+
# GPIO_17
GPIO_22
+
 
IO_24 GVS
+
==== IO_27 GVS ====
GND
+
 
3.3V
+
# GND
GPIO_24
+
# 3.3V
IO_25 GVS
+
# GPIO_27
GND
+
 
3.3V
+
==== IO_23 GVS ====
GPIO_25
+
 
SPI0 (Serial Peripheral Interface)
+
# GND
GND
+
# 3.3V
3.3V
+
# GPIO_23
MOSI
+
 
MISO
+
==== IO_22 GVS ====
SCK
+
 
CE0
+
# GND
SPI1 (Serial Peripheral Interface)
+
# 3.3V
GND
+
# GPIO_22
3.3V
+
 
MOSI
+
==== IO_24 GVS ====
MISO
+
 
SCK
+
# GND
CE1
+
# 3.3V
IO_5 GVS
+
# GPIO_24
GND
+
 
3.3V
+
==== IO_25 GVS ====
GPIO_5
+
 
IO_6 GVS
+
# GND
GND
+
# 3.3V
3.3V
+
# GPIO_25
GPIO_6
+
 
IO_12 GVS
+
==== SPI0 (Serial Peripheral Interface) ====
GND
+
 
3.3V
+
# GND
GPIO_12
+
# 3.3V
IO_13 GVS
+
# MOSI
GND
+
# MISO
3.3V
+
# SCK
GPIO_13
+
# CE0
IO_19 GVS
+
 
GND
+
==== SPI1 (Serial Peripheral Interface) ====
3.3V
+
 
GPIO_19
+
# GND
IO_16 GVS
+
# 3.3V
GND
+
# MOSI
3.3V
+
# MISO
GPIO_16
+
# SCK
IO_26 GVS
+
# CE1
GND
+
 
3.3V
+
==== IO_5 GVS ====
GPIO_26
+
 
IO_20 GVS
+
# GND
GND
+
# 3.3V
3.3V
+
# GPIO_5
GPIO_20
+
 
IO_21 GVS
+
==== IO_6 GVS ====
GND
+
 
3.3V
+
# GND
GPIO_21
+
# 3.3V
J22 - EEPROM Address/Write Enable Header - Rev X2 Hat
+
# GPIO_6
Write Enable - Install header to allow writes to EEPROM
+
 
Remove header to protect EEPROM contents from accidental writes
+
==== IO_12 GVS ====
J22 - EEPROM Address/Write Enable Header - Rev X1 Hat
+
 
RasPi-GVS-Plus-CFG-adrsel-we.png
+
# GND
 +
# 3.3V
 +
# GPIO_12
 +
 
 +
==== IO_13 GVS ====
 +
 
 +
# GND
 +
# 3.3V
 +
# GPIO_13
 +
 
 +
==== IO_19 GVS ====
 +
 
 +
# GND
 +
# 3.3V
 +
# GPIO_19
 +
 
 +
==== IO_16 GVS ====
 +
 
 +
# GND
 +
# 3.3V
 +
# GPIO_16
 +
 
 +
==== IO_26 GVS ====
 +
 
 +
# GND
 +
# 3.3V
 +
# GPIO_26
 +
 
 +
==== IO_20 GVS ====
 +
 
 +
# GND
 +
# 3.3V
 +
# GPIO_20
 +
 
 +
==== IO_21 GVS ====
 +
 
 +
# GND
 +
# 3.3V
 +
# GPIO_21
 +
 
 +
==== J22 - EEPROM Address/Write Enable Header - Rev X2 Hat ====
 +
 
 +
* Write Enable - Install header to allow writes to EEPROM
 +
* Remove header to protect EEPROM contents from accidental writes
 +
 
 +
==== J22 - EEPROM Address/Write Enable Header - Rev X1 Hat ====
 +
 
 +
[[File:RasPi-GVS-Plus-CFG-adrsel-we.png]]
 +
 
 +
* 1-2 = Write Enable - install to allow writes
 +
* 3-4 = A0 - installed = 0
 +
* 5-6 = A1 - installed = 0
 +
* 7-8 = A2 - installed = 0
 +
 
 +
==== J23 - Voltage translator, 3V side ====
 +
 
 +
* V3-1 = Bit 1
 +
* V3-2 = Bit 2
 +
* V3-3 = Bit 3
 +
* V3-4 = Bit 4
 +
* V3-5 = Bit 5
 +
* V3-6 = Bit 6
 +
* V3-7 = Bit 7
 +
* V3-8 = Bit 8
 +
 
 +
=== 5V Connectors ===
  
1-2 = Write Enable - install to allow writes
 
3-4 = A0 - installed = 0
 
5-6 = A1 - installed = 0
 
7-8 = A2 - installed = 0
 
J23 - Voltage translator, 3V side
 
V3-1 = Bit 1
 
V3-2 = Bit 2
 
V3-3 = Bit 3
 
V3-4 = Bit 4
 
V3-5 = Bit 5
 
V3-6 = Bit 6
 
V3-7 = Bit 7
 
V3-8 = Bit 8
 
5V Connectors
 
 
The following are 5V connectors.
 
The following are 5V connectors.
  
V5-1 - GVS connector, 5V side
+
==== V5-1 - GVS connector, 5V side ====
Ground
+
 
+5V
+
# Ground
Bit1
+
# +5V
V5-2 - GVS connector, 5V side
+
# Bit1
Ground
+
 
+5V
+
==== V5-2 - GVS connector, 5V side ====
Bit2
+
 
V5-3 - GVS connector, 5V side
+
# Ground
Ground
+
# +5V
+5V
+
# Bit2
Bit3
+
 
V5-4 - GVS connector, 5V side
+
==== V5-3 - GVS connector, 5V side ====
Ground
+
 
+5V
+
# Ground
Bit4
+
# +5V
V5-5 - GVS connector, 5V side
+
# Bit3
Ground
+
 
+5V
+
==== V5-4 - GVS connector, 5V side ====
Bit5
+
 
V5-6 - GVS connector, 5V side
+
# Ground
Ground
+
# +5V
+5V
+
# Bit4
Bit6
+
 
V5-7 - GVS connector, 5V side
+
==== V5-5 - GVS connector, 5V side ====
Ground
+
 
+5V
+
# Ground
Bit7
+
# +5V
V5-8 - GVS connector, 5V side
+
# Bit5
Ground
+
 
+5V
+
==== V5-6 - GVS connector, 5V side ====
Bit8
+
 
Layout - Rev X2
+
# Ground
 +
# +5V
 +
# Bit6
 +
 
 +
==== V5-7 - GVS connector, 5V side ====
 +
 
 +
# Ground
 +
# +5V
 +
# Bit7
 +
 
 +
==== V5-8 - GVS connector, 5V side ====
 +
 
 +
# Ground
 +
# +5V
 +
# Bit8
 +
 
 +
== Layout - Rev X2 ==
 +
 
 
Kickstarter Edition
 
Kickstarter Edition
  
RasPi-Plus-GVS-CFG-X2-mechs.png
+
[[File:RasPi-Plus-GVS-CFG-X2-mechs.png]]
 +
 
 +
== Layout - Rev X1 ==
  
Layout - Rev X1
 
 
Prototype Edition - Not available on Kickstarter
 
Prototype Edition - Not available on Kickstarter
  
 
RasPi-GVS-Plus-CFG-mechs.png
 
RasPi-GVS-Plus-CFG-mechs.png
  
Assembly Sheet
+
== Assembly Sheet ==
 +
 
 
RasPi-Plus-GVS-Cfg Configuration Sheet - Rev X2
 
RasPi-Plus-GVS-Cfg Configuration Sheet - Rev X2
Design Validation Testing - Rev X1 Board
+
 
 +
== Design Validation Testing - Rev X1 Board ==
 +
 
 
RASPI-PLUS-GVS-CFG DVT
 
RASPI-PLUS-GVS-CFG DVT
  
Factory Acceptance Tests (FAT)
+
=== Factory Acceptance Tests (FAT) ===
Hardware
+
 
FAT requires the following:
+
==== Hardware ====
 +
 
 +
* FAT requires the following:
 +
* Raspberry Pi Model B+ or equivalent (RasPi)
 +
* Power supply for Raspberry Pi (5V at 1 Amp min) with Micro USB connector
 +
* Monitor, Keyboard or Ethernet cable and laptop running puTTY
 +
* Test Software loaded onto RasPi
 +
* (1) LED-Test card
 +
* + side of LEDs to V5-2 thru 8
 +
* - side of LEDs to GND at +5V side
 +
* Jumpers (female-to-female)
 +
* Daisy-chain cables
 +
** 8-pin, 1-2, 3-4, 5-6, 7-8 @ IO6-IO21
 +
** (2) 4-pin, 1 open, 2 open, 3-4 @ J1, J2
 +
* Single female to female @ SPI1-IO5
 +
* 6 pin, 1 open, 2 open, 3-4, 5-6 @ SPI0
 +
* (3) 8-pin female-female jumper cables
 +
* 1 jumper +3.3V side to IO4-IO25
 +
* 2 (to LED-Test card)
 +
* Unit Under Test (UUT)
 +
 
 +
[[File:RPP-GVS-CFG-X2-fastTest-640px.jpg]]
 +
 
 +
=== Preliminary ===
 +
 
 +
* Install UUT onto RasPi
 +
* Install Cables
 +
* Power up card
 +
* Log into RasPi
  
Raspberry Pi Model B+ or equivalent (RasPi)
+
==== GVS Connector - Daisy-chain Tests ====
Power supply for Raspberry Pi (5V at 1 Amp min) with Micro USB connector
 
Monitor, Keyboard or Ethernet cable and laptop running puTTY
 
Test Software loaded onto RasPi
 
(1) LED-Test card
 
+ side of LEDs to V5-2 thru 8
 
- side of LEDs to GND at +5V side
 
Jumpers (female-to-female)
 
Daisy-chain cables
 
8-pin, 1-2, 3-4, 5-6, 7-8 @ IO6-IO21
 
(2) 4-pin, 1 open, 2 open, 3-4 @ J1, J2
 
Single female to female @ SPI1-IO5
 
6 pin, 1 open, 2 open, 3-4, 5-6 @ SPI0
 
(3) 8-pin female-female jumper cables
 
1 jumper +3.3V side to IO4-IO25
 
2 (to LED-Test card)
 
Unit Under Test (UUT)
 
RPP-GVS-CFG-X2-fastTest-640px.jpg
 
  
Preliminary
+
* On RasPi console:
Install UUT onto RasPi
+
<pre>
Install Cables
 
Power up card
 
Log into RasPi
 
GVS Connector - Daisy-chain Tests
 
On RasPi console:
 
 
pi
 
pi
 
raspberry
 
raspberry
Line 276: Line 353:
 
sudo python fastTests.py
 
sudo python fastTests.py
 
   
 
   
Result should be
+
</pre>
 +
 
 +
*Result should be
 +
<pre>
 
Daisy test passed
 
Daisy test passed
LEDs should cycle
+
</pre>
I2C
+
* LEDs should cycle
 +
 
 +
==== I2C ====
 +
 
 +
<pre>
 
cd ~/RasPi/RasPi-Plus-GVS-Cfg/eeprom/
 
cd ~/RasPi/RasPi-Plus-GVS-Cfg/eeprom/
 
sudo ./eep2flash.sh -w -t=24c32 -f=eepcfg.eep
 
sudo ./eep2flash.sh -w -t=24c32 -f=eepcfg.eep
Line 318: Line 402:
 
#        ----  --------  ----
 
#        ----  --------  ----
 
# End of atom. CRC16=0x6eed
 
# End of atom. CRC16=0x6eed
Combined copy/paste
+
</pre>
 +
* Combined copy/paste
 +
<pre>
 
cd ~/RasPi/RasPi-Plus-GVS-Cfg/eeprom/
 
cd ~/RasPi/RasPi-Plus-GVS-Cfg/eeprom/
 
sudo ./eep2flash.sh -w -t=24c32 -f=eepcfg.eep
 
sudo ./eep2flash.sh -w -t=24c32 -f=eepcfg.eep
Line 327: Line 413:
 
cd ~/RasPi/RasPi-Plus-GVS-Cfg/
 
cd ~/RasPi/RasPi-Plus-GVS-Cfg/
 
sudo python fastTests.py== Schematic ==
 
sudo python fastTests.py== Schematic ==
 
+
<pre>
[http://land-boards.com/RASPI-PLUS-GVS-CFG/RasPi-GVS-Plus-CFG_Rev_X3_Schematic.pdf RasPi-GVS-Plus-CFG_Rev_X3_Schematic.pdf Schematic]
 
  
 
== Drivers/Example Code ==
 
== Drivers/Example Code ==

Latest revision as of 14:24, 24 January 2020

Tindie-mediums.png

RasPi-Plus-GVS-Cfg-X2-CCA-640px.jpg

Features

  • All Raspberry Pi I/O lines
  • 8-bit bidirectional 3.3V to 5V level translator
  • Configuration EEPROM
  • Fuses on power

Raspberry Pi I/O lines

  • All of the Raspberry Pi Model B+ I/O connections are brought to GVS connectors. This is:
    • (17) GPIO lines on GVS connectors
    • (2) SPI interfaces
    • (1) UART interface
    • (1) I2C interface

Level translators

  • The BBB-GVS board use an 8-bit wide Texas Instrument TXS0108 voltage translator to convert up to 8 of the 3.3V I/O lines to 5V I/O levels.

Voltage Translators Features

  • No Direction-Control Signal Needed
  • Max Data Rates
    • 60 Mbps (Push Pull)
    • 2 Mbps (Open Drain)
  • 1.2 V to 3.6 V on A Port and 1.65 V to 5.5 V on
  • B Port (VCCA ≤ VCCB)
  • No Power-Supply Sequencing Required –
    • Either VCCA or VCCB Can Be Ramped First
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22 (A Port)
    • 2000-V Human-Body Model (A114-B)
    • 150-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)
  • IEC 61000-4-2 ESD (B Port)
    • ±6-kV Air-Gap Discharge
    • ±8-kV Contact Discharge

Voltage Translators Architecture

Datasheet

The TXS0108E can be used in level-translation applications for interfacing devices or systems operating at different interface voltages with one another. The TXS0108E is ideal for use in applications where an open-drain driver is connected to the data I/Os. The TXS0108E can also be used in applications where a push-pull driver is connected to the data I/Os, but the TXB0104 might be a better option for such push-pull applications. The TXS0108E device is a semi-buffered auto-direction-sensing voltage translator design is optimized for translation applications (e.g. MMC Card Interfaces) that require the system to start out in a low-speed open-drain mode and then switch to a higher speed push-pull mode.

TXS0108Arch.PNG

To address these application requirements, a semi-buffered architecture design is used and is illustrated above (see Figure 1). Edge-rate accelerator circuitry (for both the high-to-low and low-to-high edges), a High-Ron n-channel pass-gate transistor (on the order of 300 Ω to 500 Ω) and pull-up resistors (to provide DC-bias and drive capabilities) are included to realize this solution. A direction-control signal (to control the direction of data flow from A to B or from B to A) is not needed. The resulting implementation supports both low-speed open-drain operation as well as high-speed push-pull operation.

When transmitting data from A to B ports, during a rising edge the One-Shot (OS3) turns on the PMOS transistor (P2) for a short-duration and this speeds up the low-to-high transition. Similarly, during a falling edge, when transmitting data from A to B, the One-Shot (OS4) turns on NMOS transistor (N2) for a short-duration and this speeds up the high-to-low transition. The B-port edge-rate accelerator consists of one-shots OS3 and OS4, Transistors P2 and N2 and serves to rapidly force the B port high or low when a corresponding transition is detected on the A port.

When transmitting data from B to A ports, during a rising edge the One-Shot (OS1) turns on the PMOS transistor (P1) for a short-duration and this speeds up the low-to-high transition. Similarly, during a falling edge, when transmitting data from B to A, the One-Shot (OS2) turns on NMOS transistor (N1) for a short-duration and this speeds up the high-to-low transition. The A-port edge-rate accelerator consists of one-shots OS1 and OS2, Transistors P1 and N1 components and form the edge-rate accelerator and serves to rapidly force the A port high or low when a corresponding transition is detected on the B port.

Fuses

  • The board has Resettable fuses on the 3.3V and 5V from the Raspberry Pi.
  • These fuses protect your Raspberry Pi from overloads.
  • These fuses are 1/2 Amp PTC fuses.
  • PTC fuses have certain advantages (they are self healing) and disadvantages (they are not like a wire fuse which acts like a switch).
  • If you trust your wiring you may choose to solder a wire over the fuse.
    • Care should be taken when doing so.

Configuration EEPROM

3.3V Connectors

The following are all 3.3VDC connections.

Raspberry Pi B Plus GPIO Connector

  • J8 on the Pi.

File:Bplus-gpio-edited.png

I2C bus

  1. GND
  2. 3.3V
  3. SDA
  4. SCL

UART I/F

  1. GND
  2. 3.3V
  3. TxD
  4. RxD

IO_4 GVS

  1. GND
  2. 3.3V
  3. GPIO_4

IO_18 GVS

  1. GND
  2. 3.3V
  3. GPIO_18

IO_17 GVS

  1. GND
  2. 3.3V
  3. GPIO_17

IO_27 GVS

  1. GND
  2. 3.3V
  3. GPIO_27

IO_23 GVS

  1. GND
  2. 3.3V
  3. GPIO_23

IO_22 GVS

  1. GND
  2. 3.3V
  3. GPIO_22

IO_24 GVS

  1. GND
  2. 3.3V
  3. GPIO_24

IO_25 GVS

  1. GND
  2. 3.3V
  3. GPIO_25

SPI0 (Serial Peripheral Interface)

  1. GND
  2. 3.3V
  3. MOSI
  4. MISO
  5. SCK
  6. CE0

SPI1 (Serial Peripheral Interface)

  1. GND
  2. 3.3V
  3. MOSI
  4. MISO
  5. SCK
  6. CE1

IO_5 GVS

  1. GND
  2. 3.3V
  3. GPIO_5

IO_6 GVS

  1. GND
  2. 3.3V
  3. GPIO_6

IO_12 GVS

  1. GND
  2. 3.3V
  3. GPIO_12

IO_13 GVS

  1. GND
  2. 3.3V
  3. GPIO_13

IO_19 GVS

  1. GND
  2. 3.3V
  3. GPIO_19

IO_16 GVS

  1. GND
  2. 3.3V
  3. GPIO_16

IO_26 GVS

  1. GND
  2. 3.3V
  3. GPIO_26

IO_20 GVS

  1. GND
  2. 3.3V
  3. GPIO_20

IO_21 GVS

  1. GND
  2. 3.3V
  3. GPIO_21

J22 - EEPROM Address/Write Enable Header - Rev X2 Hat

  • Write Enable - Install header to allow writes to EEPROM
  • Remove header to protect EEPROM contents from accidental writes

J22 - EEPROM Address/Write Enable Header - Rev X1 Hat

RasPi-GVS-Plus-CFG-adrsel-we.png

  • 1-2 = Write Enable - install to allow writes
  • 3-4 = A0 - installed = 0
  • 5-6 = A1 - installed = 0
  • 7-8 = A2 - installed = 0

J23 - Voltage translator, 3V side

  • V3-1 = Bit 1
  • V3-2 = Bit 2
  • V3-3 = Bit 3
  • V3-4 = Bit 4
  • V3-5 = Bit 5
  • V3-6 = Bit 6
  • V3-7 = Bit 7
  • V3-8 = Bit 8

5V Connectors

The following are 5V connectors.

V5-1 - GVS connector, 5V side

  1. Ground
  2. +5V
  3. Bit1

V5-2 - GVS connector, 5V side

  1. Ground
  2. +5V
  3. Bit2

V5-3 - GVS connector, 5V side

  1. Ground
  2. +5V
  3. Bit3

V5-4 - GVS connector, 5V side

  1. Ground
  2. +5V
  3. Bit4

V5-5 - GVS connector, 5V side

  1. Ground
  2. +5V
  3. Bit5

V5-6 - GVS connector, 5V side

  1. Ground
  2. +5V
  3. Bit6

V5-7 - GVS connector, 5V side

  1. Ground
  2. +5V
  3. Bit7

V5-8 - GVS connector, 5V side

  1. Ground
  2. +5V
  3. Bit8

Layout - Rev X2

Kickstarter Edition

RasPi-Plus-GVS-CFG-X2-mechs.png

Layout - Rev X1

Prototype Edition - Not available on Kickstarter

RasPi-GVS-Plus-CFG-mechs.png

Assembly Sheet

RasPi-Plus-GVS-Cfg Configuration Sheet - Rev X2

Design Validation Testing - Rev X1 Board

RASPI-PLUS-GVS-CFG DVT

Factory Acceptance Tests (FAT)

Hardware

  • FAT requires the following:
  • Raspberry Pi Model B+ or equivalent (RasPi)
  • Power supply for Raspberry Pi (5V at 1 Amp min) with Micro USB connector
  • Monitor, Keyboard or Ethernet cable and laptop running puTTY
  • Test Software loaded onto RasPi
  • (1) LED-Test card
  • + side of LEDs to V5-2 thru 8
  • - side of LEDs to GND at +5V side
  • Jumpers (female-to-female)
  • Daisy-chain cables
    • 8-pin, 1-2, 3-4, 5-6, 7-8 @ IO6-IO21
    • (2) 4-pin, 1 open, 2 open, 3-4 @ J1, J2
  • Single female to female @ SPI1-IO5
  • 6 pin, 1 open, 2 open, 3-4, 5-6 @ SPI0
  • (3) 8-pin female-female jumper cables
  • 1 jumper +3.3V side to IO4-IO25
  • 2 (to LED-Test card)
  • Unit Under Test (UUT)

RPP-GVS-CFG-X2-fastTest-640px.jpg

Preliminary

  • Install UUT onto RasPi
  • Install Cables
  • Power up card
  • Log into RasPi

GVS Connector - Daisy-chain Tests

  • On RasPi console:
pi
raspberry
 
cd ~/RasPi/RasPi-Plus-GVS-Cfg/
sudo python fastTests.py
 
  • Result should be
Daisy test passed
  • LEDs should cycle

I2C

cd ~/RasPi/RasPi-Plus-GVS-Cfg/eeprom/
sudo ./eep2flash.sh -w -t=24c32 -f=eepcfg.eep
sudo ./eep2flash.sh -r -t=24c32 -f=myeep.eep 
rm stuff.eep
./eepdump myeep.eep stuff.eep 
more stuff.eep | grep vendor
 
Verify:
# ---------- Dump generated by eepdump handling format version 0x01 ----------
#
# --Header--
# signature=0x69502d52
# version=0x01
# reserved=0
# numatoms=2
# eeplen=117
# ----------


# Start of atom #0 of type 0x0001 and length 57
# Vendor info
product_uuid 3ea7c89f-353e-4633-bd6c-2572996f277b
product_id 0x0004
product_ver 0x0001
vendor "land-boards.com"   # length=15
product "RASPI-PLUS-GVS-CFG"   # length=18
# End of atom. CRC16=0x437a


# Start of atom #1 of type 0x0002 and length 32
# GPIO map info
gpio_drive 0
gpio_slew 0
gpio_hysteresis 0
back_power 0
#        GPIO  FUNCTION  PULL
#        ----  --------  ----
# End of atom. CRC16=0x6eed
  • Combined copy/paste
cd ~/RasPi/RasPi-Plus-GVS-Cfg/eeprom/
sudo ./eep2flash.sh -w -t=24c32 -f=eepcfg.eep
sudo ./eep2flash.sh -r -t=24c32 -f=myeep.eep 
rm stuff.eep
./eepdump myeep.eep stuff.eep 
diff stuff.eep eepcomp.eep
cd ~/RasPi/RasPi-Plus-GVS-Cfg/
sudo python fastTests.py== Schematic ==

Drivers/Example Code

* Github repo - Driver code

Assembly Sheet

* RASPI-PLUS-GVS-CFG Assembly Sheet