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RoadRunner (Microchip SAMA5D27) technical documentation

• Product description
• Getting started with RoadRunner on Berta D2 board

Declarations of conformity

• Long term availability
• RoHS Declaration of conformity 2021

Downloads

• Linux Kernel 5.15.68 - Debian Bullseye 11.5 - At91Bootstrap 4.0.4
• Previous versions

Create the Linux boot images from scratch

• Compiling AT91bootstrap 4.0.4
• Compiling Linux Kernel 5.15 LTS
• Build a customized Linux Debian image with Debos
• -----------------------------------------
• Compiling AT91bootstrap 3.9.1 (old)
• Compiling Linux Kernel 4.19 LTS (old)
• BuildRoot-at91 2020.04 (old)

Power

• Sleep modes
• Power consumption

Peripherals how tos

• Using all the 10 serial ports of RoadRunner
• ADC converter
• SPI bus
  • Use 2.8 inch TFT displays on SPI ports
• How to use the I2C ports
• ISC Image Sensor Controller (Camera)
• 1-Wire
• General purpose I/O (GPIO lines)
  • Manage the GPIO lines from command line with gpiod
  • Manage the GPIO lines in Python3 and C with libgpiod
  • Manage the GPIO lines using Node-RED
  • Manage the GPIO lines using the Microchip Peripheral I/O Python Package
  • Manage the GPIO lines using the sysfs user interface (deprecated)
  • Manage the special GPIO lines
  • Check the current gpio setting: less /sys/kernel/debug/pinctrl/fc038000.pinctrl-atmel_pinctrl/pinconf-pins
• Class D amplifier
• PDMIC MEMS microphone stereo input
• Display DPI interface
• MMC0 bus
• WiFi
  • WIFI-2 - OEM WiFi USB module (RaLink RT5370N) (Out of stock)
  • WIFI-3 - USB WiFi dongle @ 5.8GHz-2.4GHz
  • WIFI-4 - USB WiFi module 2.4 / 5.8 gHz
  • WIFI-5 - OEM WiFi USB module (Mediatek MT7601U)
• How to Use the SAMA5D2 PWM Under Linux (Microchip)
• Find out the speed of the usb ports

How tos

• Write on QuadSPI memory with SAM-BA
• Compile a SAM-BA Applets
• Run a full working Buildroot Linux using just a 128MB QuadSPI
• Fix the MAC address of RoadRunner
• Installing Node-RED 3.0.2 on RoadRunner
• More...

Third party how tos

• Scripts to automate kernel builds for AcmeSystem's boards
• Scripts to build Debian images for AcmeSystems boards

Experiments

• Use Raspbian Linux with RoadRunner

Hardware reference

• Pinout
• Pin description
• Berta D2 schematic: (ver 1.1), (ver 1.0)
• How to recognize an Acme board

Mechanical

• Mechanical dimensions
• SOM step model
• Headers Step model
• BertaD2 Step model
• BertaD2 Step model without RoadRunner

PCB reference

• Gerber Files
• Altium component SCH
• Altium component PCB
• Altium Designer project files of Berta D2 (ver 1.1), (ver 1.0)

How to design the PCB to use with Acme SOM

• How to design the power supply circuitry
• How to design the Ethernet circuitry
• How to design the USB circuitry
• How to design the microSD circuitry
• How to design the PWM circuitry
• How to design the ADC circuitry
• How to design the serial circuitry
• How to design the GPIO circuitry
• How to design the LCD circuitry
• miniPCIe for SIMCOM 7600 Modem
• How to design the HSIC circuitry

Studies

• Notes for a wall mount mini terminal for audio applications

Datasheets

• Microchip SAMA5D27
• QuadSPI Serial NOR Flash Memory 16MB (RW210)
• QuadSPI Serial NOR Flash Memory 64MB (RW181)
• QuadSPI Serial NOR Flash Memory 128MB (RW185)
• Micron DD3 DRAM 256MByte
• Hirose Connectors for carriers board
  • Use Hirose DF40C-100DS-0.4V(51) for Stacking Height of 1.5mm
  • Use Hirose DF40HC(3.0)-100DS-0.4V(51) for Stacking Height of 3.0mm

Obsolete articles

• Compiling Linux Kernel 4.4.X LTS
• Build a Debian Jessie root filesystem

Other links

• Using Ultra Low Power mode 1 (ULP1) on SAMA5D2
• The DRM/KMS subsystem from a newbie’s point of view
• How to use the Atmel KMS/DRM LCD driver
• IoT Security Suite For Microchip SAMA5D2
• SAMA5D2 Xplained Board
• SAMA5D2 Xplained Ultra Evaluation Kit