I am sorry about that but I really don't understand this.
- Could you please provide the chapter where I can find the information about the 11.5MB? (I think MMU, Cache, ...)
- What is the TPM?
ESP32 with 16MB Flash --> my thoughts are: Access all 16MB of the Flash, is this possible or are there limitations because of the 11.5MB?
Thank you.
Questions in 2. stage bootloader code
Re: Questions in 2. stage bootloader code
Technical Reference Manual
1.3.3 External Memory
26.3.2.2 External Memory
https://docs.espressif.com/projects/esp ... index.html
1.3.3 External Memory
26.3.2.2 External Memory
https://docs.espressif.com/projects/esp ... index.html
You cannot access it all at once by memory mapping but you can access it by flash read APIs like esp_partition. I don't know if esp-idf is even supporting up to 11.5mb limit.Access all 16MB of the Flash, is this possible or are there limitations because of the 11.5MB
Re: Questions in 2. stage bootloader code
Hm Thank you but I still understand this...
Why I cannot acces them all? Because there is MMU needed? --> Then I have to check MMU / Cache first...
Thank you.
Why I cannot acces them all? Because there is MMU needed? --> Then I have to check MMU / Cache first...
Thank you.
Re: Questions in 2. stage bootloader code
Flash, it is external and it is only connected by SPI. Two ways to access it, both over SPI. Either the cache/mmu will do the SPI transaction in the background or you will do it using API calls like esp_partiton. Flash cache and mmu have limitations due to design/silicon implementation. You just have to live with it or use another chip.
Re: Questions in 2. stage bootloader code
Ah okay.
The differerence between the cache and the api helps me a lot
I will check the difference in detail
Greetings
The differerence between the cache and the api helps me a lot
I will check the difference in detail
Greetings
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