Getting started with BeagleBone Black - Embedded Linux
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The document provides an overview of the Beagle Bone Black, detailing its architecture, booting sequence, and peripheral interfaces. It explains the booting process, including the role of system boot pins and the different boot devices associated with the controller. Additionally, it covers the stages of the boot loader involved in initializing the board.
Getting started with BeagleBone Black - Embedded Linux
- 1. Team Emertxe Beagle Bone Black Overview
- 2. Contents
- 3. Beagle Bone Black Contents ● Target Overview ● Booting Sequence ● Peripheral Interfaces
- 5. Beagle Bone Black Target Overview ● Know your Target Controller ● Target Architecture ● Target Board
- 6. Beagle Bone Black Target Overview - Target Controller
- 7. Beagle Bone Black Target Overview - Target Architecture AM3359 DDR3L EEPROM HDMI DBGU USB GPIO Ethernet Micro SD eMMC User LEDs
- 8. Beagle Bone Black Target Overview - Board
- 10. Beagle Bone Black Booting Sequence ● Controller's Booting Sequence ● Boot Loader Stages
- 11. Beagle Bone Black Booting Sequence - Controller's Boot Sequence ● The AM338X controller has many booting options ● The SYSBOOT pins configuration decide the booting sequence ● The ROM Code creates the booting device list based on the the SYSBOOT pins ● The Booting sequence is discussed in the next slide
- 12. Beagle Bone Black Booting Sequence - Controller's Boot Sequence System Startup Initialization __main() (stack setup) main() MPU WDT1 Setup DPLL and Clock Configurations Booting
- 13. Beagle Bone Black Booting Sequence - Controller's Boot Sequence Booting Set the booting device list based on the SW Booting Configuration or SYSBOOT pins Memory Booting Peripheral Booting Process Device List Last device in the list Process next device Device is of memory type Device is of peripheral type Jump to Initial SW Get next device in the list No No more devices in the list Yes Dead Loop Fail Fail Timeout success success
- 14. Beagle Bone Black Booting Sequence – BBB Boot Device List ● On SW2 release – MMC1 (on board eMMC) – MMC0 (micro SD Card) – UART0 – USB0 ● On SW2 pressed – SPI0 (SPI EEPROM) – MMC0 (micro SD Card) – UART0 – USB0
- 15. ● Stage 1 Boot Loader ● Stage 2 Boot Loader Beagle Bone Black Booting Sequence – Boot Loader Stages
- 16. ● Pointer to Stage 2 Boot Loader Beagle Bone Black Booting Sequence – Stage 1 Boot Loader ROM (ROM Code) SRAM Stage 2 Boot Loader Kernel Data MMC/ eMMC Stage 1 Boot Loader
- 17. ● Pointer to Kernel Image ● We use U-Boot as S2BL Beagle Bone Black Booting Sequence – Stage 2 Boot Loader Stage 2 Boot Loader Kernel Data MMC/ eMMC Stage 1 Boot Loader
- 18. Thank You