qsbc-zero

About

Specs:

• i.MX6ULL ARM Cortex-A7
• 512MB DDR3L
• 4MB QSPI Flash
• MicroSD card slot
• USB Type-C DRP and USB Type-A port
• 10/100M Ethernet
• Dual 36 pin GPIO headers
• PF1510 PMIC
• USB Type-C Power in

Manufactured using JLCPCB's JLC2116 stackup

Setup

Flashing u-boot

1. Build imx_usb_loader

   git clone git@github.com:boundarydevices/imx_usb_loader.git
   cd imx_usb_loader
   make
   

2. Build u-boot

   git clone git@gitlab.com:quentin-z80/u-boot.git
   cd u-boot
   export CROSS_COMPILE=arm-linux-gnueabi- ARCH=arm
   make qsbc-zero_defconfig
   make
   

3. Build qspi-header

   cd tools/qspi-header
   ./qspi-header.sh qspi-nor-winbond-w25q32jv-config qspi-config.bin
   

4. Connect to board over serial and load u-boot over usb

   screen /dev/ttyUSB0 115200
   ./imx_usb_loader /path/to/u-boot/u-boot-dtb.imx
   

5. Transfer qspi-header over XMODEM or any other method and flash

   sf probe
   sf erase 0x0 0x400000
   loadx
   

   in screen hit Ctrl-A followed by :

   exec !! sx /path/to/qspi-header/qspi-config.bin
   sf write $loadaddr 0x400 $filesize
   

6. Transfer u-boot over XMODEM or any other method and flash

   loadx
   

   in screen hit Ctrl-A followed by :

   exec !! sx /path/to/u-boot/u-boot-dtb.imx
   sf write $loadaddr 0x1000 $filesize
   

7. Blow fuses to boot from qspi

   fuse prog -y 0 5 0x10 #BOOT_CFG1[4] = 1
   fuse prog -y 0 6 0x10 #BT_FUSE_SEL = 1
   

TODO

Rev 3

• Use interrupt for ETH PHY
• Swap USB-A and USB-C Locations
• Change SOC power tracks to zones

Linux

• Port PF1510 driver