Posted on November 14, 2017 at 16:491. I have necessity force to start STM32F7 after reset as fast as possible.
How to do it correctly using HAL or Low-layer drivers?
In 'Description of STM32F7 HAL and Low-layer drivers' I find in chapter 'FAQs'
Follow the sequence below to use the APIs provided in the HAL drivers:
1. Call HAL_Init() function to initialize the system (data cache, NVIC priority,…).
2. Initialize the system clock by calling HAL_RCC_OscConfig() followed by
HAL_RCC_ClockConfig().
3. Add HAL_IncTick() function under SysTick_Handler() ISR function to enable polling
process when using HAL_Delay() function
4. Start initializing your peripheral by calling HAL_PPP_Init().
5. Implement the hardware low level initialization (Peripheral clock, GPIO, DMA,..) by
calling HAL_PPP_MspInit() inxx_hal_msp.c
6. Start your process operation by calling IO operation functions.
As i understood after the resett, the STM32F7 series is running on HSI clock(It means 16MHz).
And runtime envioroument called on HSI frequncy.
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Issues.
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1. I have necessity force to start STM32F7 after reset as fast as possible.
How to do it correctly using HAL or Low-layer drivers?
2.I have necessity to check and initialize External SRAM and SDRAM,
before running 'C-runtime envioroument'.
Is it possible using HAL or Low-layer drivers?
For experiments I used Evaluation board with STM32F746G-EVAL2,
Firmware: J-Link ARM / Flasher ARM V4.
My best regards,
Andrij Markovsky
