RPPSOC

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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

  • Steps
  1. Program Pi Hat EEPROM
  2. Test Card using Raspberry Pi and PSOC code
  3. Program Shipping Program

Program Pi Hat EEPROM

Test Card using Raspberry Pi and PSOC code

RPPSOC TEST P110153-720PX.JPG

  • Unit Under Test (UUT)
  • Raspberry Pi
  • (2) LED-TEST-2 Cards attached to UUT J3, J4
  • Cables set
  • RPPSOC running RPPSOC-FAT-Chain
    • Logic inside PSoC
      • Blinks LEDs attached to J3, J4
      • 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
  • Repeats 100x
  • Result should be
Passed 100 loop test

Program Shipping Program

  • Program with Shipment code RPPSOC-Blink2
  • Blinks on-board LED from the PSoC CPU code

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