This example shows how to use, for debug purpose, the RCC_GetClocksFreq function to retrieve the current status and frequencies of different on chip clocks. You can see the RCC_ClockFreq structure content, which hold the frequencies of different on chip clocks, using your toolchain debugger. This example handles also the High Speed External clock (HSE) failure detection: when the HSE clock disappears (broken or disconnected external Quartz) HSE, PLL are disabled (but no change on PLL config), HSI selected as system clock source and an interrupt (NMI) is generated. In the NMI ISR, the HSE, HSE ready interrupt are enabled and once HSE clock recover, the HSERDY interrupt is generated and in the RCC ISR routine the system clock is reconfigured to its previous state (before HSE clock failure). You can monitor the system clock on MCO2 pin(PC9). Four LEDs are toggled with a timing defined by the Delay function.

RCC
...\.DS_Store
__MACOSX
........\RCC
........\...\._.DS_Store
RCC\EWARM
...\.....\RCC.ewd
...\.....\RCC.ewp
...\.....\RCC.eww
...\.....\stm32f4xx_flash.icf
...\main.c
...\MDK-ARM
...\.......\RCC.uvopt
...\.......\RCC.uvproj
...\readme.txt
...\stm32f4xx_conf.h
...\stm32f4xx_it.c
...\stm32f4xx_it.h
...\system_stm32f4xx.c
...\TASKING
...\.......\.metadata
...\.......\RCC
...\.......\...\.cproject
...\.......\...\.project
...\.......\...\RCC.launch
...\.......\...\TASKING
...\.......\...\.......\cstart_thumb2.asm
...\.......\...\.......\stm32f2xx.lsl
...\TrueSTUDIO
...\..........\.metadata
...\..........\.........\Link
...\..........\RCC
...\..........\...\.cproject
...\..........\...\.project
...\..........\...\.settings
...\..........\...\.........\com.atollic.truestudio.debug.hardware_device.prefs
...\..........\...\RCC.elf.launch
...\..........\...\stm32_flash.ld

• We are an exchange download platform that only provides communication channels. The downloaded content comes from the internet. Except for download issues, please Google on your own.
• The downloaded content is provided for members to upload. If it unintentionally infringes on your copyright, please contact us.
• Please use Winrar for decompression tools
• If download fail, Try it againg or Feedback to us.
• If downloaded content did not match the introduction, Feedback to us，Confirm and will be refund.
• Before downloading, you can inquire through the uploaded person information

Nothing．