Friday, 9 November 2012

Fast Bootloader for BragleBone and AM335x

I made a third level bootloader, that can load user standalone applications more quickly than StarterWare bootloader.
Can be adapted to work with all boards with AM335x TI microcontroller.
The bootloader can load applications with approximately 4.5MB/s depending to the size of fat cluster, the speed of uSD memory card (if a cluster of uSD filesystem is 16KB the speed is higher than one uSD card with 8KB cluster).
This bootloader is made to be loaded at address 0x87F80000(at end of beaglebone RAM memory), If you want to load this bootloader on another location please don't hesitate to write me.
Your application will be named APP.BIN to be loaded by this bootloader.

From here you can download the bootloader.
From here you can download the TI SDCard boot utility.

Thursday, 8 November 2012

AM335x SDK modified from StarterWare

After I bought a BeagleBone rev A6 boart and BeagleboneExpansion V2 CAP with a 800x480 display with capacitive touchscreen, I started to work with StarterWare available from TI.

On this SDK I try to create API's that will be very simple to use, like C#.

I try to arrange the drivers and API's and I added and translated some open source libraries.
The first result is a mix from AM335X_StarterWare_02_00_00_06 and AM335X_StarterWare_02_00_00_07.

On every version I will include a project that will show you how to use the SDK.

This SDK include the next files:

  • API's
  1. Delay API.
  2. Gfx API.
  3. GPIO API.
  4. Interrupt API.
  5. LWIP API.
  7. MMU API.
  8. PMIC API.
  9. RTC API.
  10. Capacitive touchscreen API(can read all five points).
  11. Resistive touchscreen API.
  12. TWI API.
  13. Uart API.
  14. USB API.
  15. USB mouse host API.
  16. USB MSC API.
  •  Applications
  1. Simple HTTP application(is a demo, respond only to "GET" command).
  •  Devices
  1. 24C TWI device driver.
  2. ADXL345 device driver.
  • Library
  1. Bitmap decode library.
  2. PNG decode library.
  3. Jpeg decode library.
  4. MPEG1/2 decode library.
  5. Button library.
  6. Check Box library.
  7. Virtual Keyboard library.
  8. List Box library.
  9. Picture Box library.
  10. Progress Bar library.
  11. Scroll Bar library.
  12. Text Box library.
  • System
  1. Cache.
  2. Dmtimer.
  3. Core Iit.
  4. CP15.
  5. Pin mux adc.
  6. Pin mux LCD.
  7. Pin mux MII.
  8. Pin mux MMCSD.
  9. Pin mux SPI.
  10. Pin mux TWI.
  11. Pin mux Uart.
  12. Sys timer(you can create infinite timers with precision approximate to reference timer7).
  13. Sys delay.
  14. Watchdog.
This version has one issue:

When is loaded from bootloader the USB host can't be enabled (will freeze when the USB controller is setup), to set up the USB host is necessary to hardware reset or power up the board without uSD card inserted, after a watchdog reset has the same issue.
I already posted the issue on TI.

Download source code and bin files from here.

Download SD card format utility from here.

Load the app and MLO file with SD boot card utility from archive, after this copy the APP.BIN file to uSD card.