I'm new to embedded linux and trying to explore it using Allwiner T113-i EVB.
Right now I'm struggling with boot process.
According to user manual BROM of SoC will try fetch boot code from SD card if Pin_Boot_Select != 0.
Due to lack of my experience i wasn't able to find those pins in documentation and on SoC.
Have anyone worked with Alwwiner's EVB ? Can you tell if I'm wrong ?
In https://whycan.com/files/202304/T113-I/T113-i_EVB_V1_0_20220507.pdf I can see that there are BOOT-SEL0 and BOOT-SEL1, but in PCB documentation i can't find it https://whycan.com/files/202304/T113-I/T113-I_EVB_V1_0_PCB.pdf
I'm apologizing in advance if my question seems strange or silly!
Link to User Manual - https://whycan.com/files/202304/T113-I/T113-i_User_Manual_V1.5.pdf
Link to DataSheet - https://whycan.com/files/202304/T113-I/T113-i_Datasheet_V1.4.pdf
Such devices use the same pins for multiple functions, of course not all at the same time.
A text search revealed in the data sheet (table 4-3, page 34) that
BOOT-SEL0is onPC4andBOOT-SEL1is onPC5.The schematic on sheet 10 shows the connected parts.
Be aware that there is more to the boot process than just certain levels at the GPIO pins.