Difference between revisions of "RPPSOC"

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[[File:tindie-mediums.png|link=https://www.tindie.com/products/land_boards/programmable-system-on-a-chip-for-the-raspberry-pi/]]
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== Raspberry Pi System-on-a-Chip ==
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<video type="youtube">E80f-RMSEEU</video>
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[[File:RPPSOC-P1010074-800px.jpg]]
 
[[File:RPPSOC-P1010074-800px.jpg]]
  
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* Two I/O connectors
 
* Two I/O connectors
 
* 14 + 16 = 30 I/O pins
 
* 14 + 16 = 30 I/O pins
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=== PSoC Architecture ===
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[[file:PSoC_ArchitecturePic.PNG]]
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== Headers / Connectors ==
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* Card marking
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[[FILE:RPPSOC_conns.PNG]]
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=== H1 - Programming Header ===
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* Can program the card via this connector
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** I use the [https://www.mouser.com/ProductDetail/727-CY8CKIT-059 KitProg part of CY8CKIT-059] with a 4-pin cable wired 1:1
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[[file:LitProgPlusCable_6159.jpg]]
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* Note orientation of pin 1
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[[file:RPPSOC_H1_PCB.PNG]]
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[[file:RPPSOC_H1.PNG]]
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=== H2 - EEPROM Write Enable ===
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* Install jumper on header to program EEPROM from Raspberry Pi
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** Remove jumper to write Protect EEPROM
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[[file:RPPSOC_H2_PCB.PNG]]
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[[file:RPPSOC_H2.PNG]]
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=== H3/H4 - I/O Voltage Select ===
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* Select the I/O voltage on P3, P4 output connectors
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** 3.3 or 5V
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[[file:RPPSOC_H3_PCB.PNG]]
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[[file:RPPSOC_H4_PCB.PNG]]
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[[file:RPPSOC_H3_H4.PNG]]
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=== J1 - Raspberry Pi GPIO Connector ===
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[[file:RPPSOC_J1.PNG]]
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=== P3 - I/O connector ===
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* Header indicates PSoC port
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* Schematic indicates PSoC pin number
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[[file:RPPSOC_P3_PCB.PNG]]
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[[file:RPPSOC_P3.PNG]]
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=== P4 - I/O connector ===
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* Header indicates PSoC port
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* Schematic indicates PSoC pin number
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[[file:RPPSOC_P4_PCB.PNG]]
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[[file:RPPSOC_P4.PNG]]
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== Schematic ==
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* [http://land-boards.com/RPPSOC/RPPSOC_Rev_X2_Schematic.pdf RPPSOC Schematic]
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== Factory Test Procedure ==
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* Overview of test Procedures
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# Program Hat EEPROM on UUT
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# Test Card using Raspberry Pi and PSOC code
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# Load/Verify Shipping Program
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=== Test Setup ===
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* Unit Under Test (UUT)
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* Raspberry Pi
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* (2) [[LED-TEST-2]] Cards attached to UUT J3, J4
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* Cables set
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=== Program Hat EEPROM on UUT ===
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* Can program EEPROM using [[RPI_PSOC5]] running [https://github.com/douggilliland/RPI_PSOC5/tree/master/RPI_PSOC5_Serial_01 RPI_PSOC5_Serial_01]
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* '2' to select RPPSOC
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* 'W' to write EEPROM
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* 'R' to read back EEPROM
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=== Test Card using Raspberry Pi and PSOC code ===
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[[FILE:RPPSOC_TEST_P110153-720PX.JPG]]
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* Download [https://github.com/land-boards/LB-RPPSOC/tree/master/RPPSOC-FAT-Chain.cydsn RPPSOC-FAT-Chain] to RPPSOC using KitProg from PSoC Creator
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* Description of the [https://github.com/land-boards/LB-RPPSOC/tree/master/RPPSOC-FAT-Chain.cydsn RPPSOC-FAT-Chain] logic inside PSoC
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** Blinks LEDs attached to J3, J4 in a "circular" pattern
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** Loops back pins to Raspberry Pi
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*** "Distant" pins are tested in pairs so pin shorts would be found
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[[file:RPPSOC_PSoC_FAT_SCHEMATIC.PNG]]
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* On Raspberry Pi, run [https://github.com/land-boards/LB-RPPSOC/tree/master/TestCode fastTests-RPPSOC.py]
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<pre>
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cd ~/RPPSOC/TestCodePi/
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sudo python ./fastTests-RPP-SOC.py
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</pre>
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* Verify all J3/J4 LEDs are displayed one at a time
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* Loopback test repeats 100x
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* Result should be
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<pre>
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Passed 100 loop test
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</pre>
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=== Load/Verify Shipping Program ===
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* Program UUT with Shipment code [https://github.com/land-boards/LB-RPPSOC/tree/master/RPPSOC-Blink2.cydsn RPPSOC-Blink2]
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* I/O pins (to Raspberry Pi and J3/J4) are not assigned so they don't conflict with external hardware or Host Raspberry Pi pins
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* PSoC CPU code blinks on-board LED
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** Demonstrates that the CPU is running code
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* When board is received by customer, the on-board LED should be blinking
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== Drivers/Example Code ==
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* [https://github.com/land-boards/LB-RPPSOC LB-RPPSOC GitHub Repo]
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* [https://github.com/land-boards/RPPSOC RPPSOC GitHub Repo]
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** [https://github.com/land-boards/RasPi/tree/master/RPPSOC/HSSP/HSSP_Programmer HSSP_Programmer] - Code that programs PSoC from the Raspberry Pi (.o files)
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** [https://github.com/land-boards/RasPi/tree/master/RPPSOC/eeprom EEPROM file] - Data in the On-Board EEPROM
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==== Programming PSoC from the Raspberry Pi ====
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* Program the PSoC from the Raspberry Pi using [https://github.com/land-boards/RPPSOC/tree/master/HSSP Host Sourced Serial Programming]
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* Flow
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[[FILE:HSSP-Flow.PNG]]
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===== Connections between Raspberry Pi and RPPSOC =====
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{| class="wikitable"
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!Programmer
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!H1 pin
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!Python IO Pin
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!Pi connector pin
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!WiringPi IO Pin
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|-
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|RESET
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|H1-3
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|IO_22(Python)
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|Pi Pin 15
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|GPIO.3(WiringPi)
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|-
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|SWDCLK
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|H1-4
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|IO_23(Python)
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|Pi Pin 16
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|GPIO.4(WiringPi)
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|-
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|SWDIO
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|H1-6
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|IO_25(Python)
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|Pi Pin 17
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|GPIO.5(WiringPi)
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|-
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|}
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=== SWD Timing for HSSP ===
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[[file:SWD-Timing.PNG]]
  
 
== Assembly Sheet ==
 
== Assembly Sheet ==
  
 
* [[RPPSOC Assembly Sheet]]
 
* [[RPPSOC Assembly Sheet]]

Latest revision as of 11:19, 7 October 2022

Tindie-mediums.png

Raspberry Pi System-on-a-Chip

RPPSOC-P1010074-800px.jpg

Features

  • PSOC part CY8C5267AXI-LP051
    • Core: ARM Cortex M3
    • Data Bus Width: 32 bit
    • Maximum Clock Frequency: 67 MHz
    • Program Memory Size: 128 kB
    • Data RAM Size: 32 kB
    • ADC Resolution: 12 bit
    • Data RAM Type: SRAM
    • Interface Type: I2C, USB
    • Number of ADC Channels: 1
    • Number of I/Os: 72 I/O
    • Number of Timers/Counters: 4 Timer
    • Program Memory Type: Flash
  • Works on all Raspberry Pi cards with 40 pin GPIO (A+/B+/Pi2/Pi3/Zero)
  • All 29 Raspberry Pi I/O lines are connected to the PSOC
  • 3 of the lines are used for programming the PSSoC
  • Configuration EEPROM
  • Fuses on 3.3V and 5V power
  • Two I/O connectors
  • 14 + 16 = 30 I/O pins

PSoC Architecture

PSoC ArchitecturePic.PNG

Headers / Connectors

  • Card marking

RPPSOC conns.PNG

H1 - Programming Header

LitProgPlusCable 6159.jpg

  • Note orientation of pin 1

RPPSOC H1 PCB.PNG

RPPSOC H1.PNG

H2 - EEPROM Write Enable

  • Install jumper on header to program EEPROM from Raspberry Pi
    • Remove jumper to write Protect EEPROM

RPPSOC H2 PCB.PNG

RPPSOC H2.PNG

H3/H4 - I/O Voltage Select

  • Select the I/O voltage on P3, P4 output connectors
    • 3.3 or 5V

RPPSOC H3 PCB.PNG

RPPSOC H4 PCB.PNG

RPPSOC H3 H4.PNG

J1 - Raspberry Pi GPIO Connector

RPPSOC J1.PNG

P3 - I/O connector

  • Header indicates PSoC port
  • Schematic indicates PSoC pin number

RPPSOC P3 PCB.PNG

RPPSOC P3.PNG

P4 - I/O connector

  • Header indicates PSoC port
  • Schematic indicates PSoC pin number

RPPSOC P4 PCB.PNG

RPPSOC P4.PNG

Schematic

Factory Test Procedure

  • Overview of test Procedures
  1. Program Hat EEPROM on UUT
  2. Test Card using Raspberry Pi and PSOC code
  3. Load/Verify Shipping Program

Test Setup

  • Unit Under Test (UUT)
  • Raspberry Pi
  • (2) LED-TEST-2 Cards attached to UUT J3, J4
  • Cables set

Program Hat EEPROM on UUT

Test Card using Raspberry Pi and PSOC code

RPPSOC TEST P110153-720PX.JPG

  • Download RPPSOC-FAT-Chain to RPPSOC using KitProg from PSoC Creator
  • Description of the RPPSOC-FAT-Chain logic inside PSoC
    • Blinks LEDs attached to J3, J4 in a "circular" pattern
    • Loops back pins to Raspberry Pi
      • "Distant" pins are tested in pairs so pin shorts would be found

RPPSOC PSoC FAT SCHEMATIC.PNG 

cd ~/RPPSOC/TestCodePi/
sudo python ./fastTests-RPP-SOC.py
  • Verify all J3/J4 LEDs are displayed one at a time
  • Loopback test repeats 100x
  • Result should be
Passed 100 loop test

Load/Verify Shipping Program

  • Program UUT with Shipment code RPPSOC-Blink2
  • I/O pins (to Raspberry Pi and J3/J4) are not assigned so they don't conflict with external hardware or Host Raspberry Pi pins
  • PSoC CPU code blinks on-board LED
    • Demonstrates that the CPU is running code
  • When board is received by customer, the on-board LED should be blinking

Drivers/Example Code

Programming PSoC from the Raspberry Pi

HSSP-Flow.PNG

Connections between Raspberry Pi and RPPSOC
Programmer H1 pin Python IO Pin Pi connector pin WiringPi IO Pin
RESET H1-3 IO_22(Python) Pi Pin 15 GPIO.3(WiringPi)
SWDCLK H1-4 IO_23(Python) Pi Pin 16 GPIO.4(WiringPi)
SWDIO H1-6 IO_25(Python) Pi Pin 17 GPIO.5(WiringPi)

SWD Timing for HSSP

SWD-Timing.PNG

Assembly Sheet

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