hartmannathan opened a new pull request #2570: URL: https://github.com/apache/incubator-nuttx/pull/2570
## Summary When architectural support for STM32G4 family was added, the reference manual (RM0440) was at revision 2. Since then, it has undergone several revisions. One significant change is in the table of FLASH wait states: section 3.3.3 table 9. The outcome of this change is that fewer FLASH wait states are needed for most CPU clock (HCLK) frequencies. Notably, if running the CPU clock at the maximum 170 MHz, only 4 FLASH wait states are needed, rather than the previously programmed 8 wait states. This gives a noticeable performance boost when executing code from FLASH. arch/arm/src/stm32/stm32g4xxxx_rcc.c: - FLASH_ACR_LATENCY_SETTING: Reimplement compile-time logic that selects the required wait state setting to use the new updated table. - Update all comments to indicate that RM0440 Rev 5 is used. - Update section numbers mentioned in comments in cases where they have changed due to added sections in the manual. ## Impact Performance is increased. ## Testing - Build and run on b-g474e-dpow1:nsh configuration. - nxstyle. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
