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Cortex M3 Cache disable

Note: This was originally posted on 23rd August 2010 at http://forums.arm.com

Hi everybody,

I have here an STM32F103ZE with an Cortex M3 core and I need to disable the cache. But unfortunatly I dont find any information about it. If I understood it right, I have to use the MPU - registers to disable the cache but i dont know which.
Hope you can help me!

Kind regards
Mathias

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Joseph Yiu over 12 years ago

Note: This was originally posted on 25th August 2010 at http://forums.arm.com

In addition:

1. Use interrupts instead of polling loops

2. Most STM32 parts has a flash memory prefetcher. It can affect the jitter by a small amount.
This can be turned off by writing to the Flash access control register (FLASH_ACR).
[url="http://www.st.com/stonline/products/literature/pm/17100.pdf"]http://www.st.com/stonline/products/literature/pm/17100.pdf[/url]
(I don't know if this document applies to the part you are using).

You can ask STM32 specific questions on STM32 forum on
[url="https://my.st.com/public/STe2ecommunities/mcu/Lists/ARM%20CortexM3%20STM32/AllItems.aspx"]https://my.st.com/public/STe2ecommunities/m...2/AllItems.aspx[/url]
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Joseph Yiu over 12 years ago

Note: This was originally posted on 25th August 2010 at http://forums.arm.com

In addition:

1. Use interrupts instead of polling loops

2. Most STM32 parts has a flash memory prefetcher. It can affect the jitter by a small amount.
This can be turned off by writing to the Flash access control register (FLASH_ACR).
[url="http://www.st.com/stonline/products/literature/pm/17100.pdf"]http://www.st.com/stonline/products/literature/pm/17100.pdf[/url]
(I don't know if this document applies to the part you are using).

You can ask STM32 specific questions on STM32 forum on
[url="https://my.st.com/public/STe2ecommunities/mcu/Lists/ARM%20CortexM3%20STM32/AllItems.aspx"]https://my.st.com/public/STe2ecommunities/m...2/AllItems.aspx[/url]
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