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1. 

   anton
   Member

   RCC_I2C2 in rcc.c and rcc.h placed in STM32_HIGH_DENSITY section
   although medium density chips also have two i2c.

   Is it possible to put all frequency-related constants in boards/boardname.h file?
   Including ERROR_USART_CLK_SPEED from util.c and PCLK1 from stm32.h

   Posted 4 years ago #
2. 

   anton
   Member

   How about something like this?
   

   #define HSO_FREQ 8000000UL
   
   #define RCC_PLLMUL RCC_PLLMUL_9
   
   #define CLOCK_SPEED_HZ (HSO_FREQ * RCC_PLLMUL)
   #define CLOCK_SPEED_MHZ (CLOCK_SPEED_HZ / 1000000UL)         
   
   #define RCC_AHB_SYSCLK_DIV RCC_AHB_SYSCLK_DIV_1
   #define RCC_APB1_HCLK_DIV RCC_APB1_HCLK_DIV_2
   #define RCC_APB2_HCLK_DIV RCC_APB2_HCLK_DIV_1
   
   #define CYCLES_PER_MICROSECOND  CLOCK_SPEED_MHZ
   #define SYSTICK_RELOAD_VAL     (CLOCK_SPEED_HZ / 1000 - 1) /* takes a cycle to reload */
   
   #define PCLK1   (CLOCK_SPEED_HZ / RCC_APB1_HCLK_DIV)
   #define PCLK2   (CLOCK_SPEED_HZ / RCC_APB2_HCLK_DIV)

   Posted 4 years ago #
3. 

   mbolivar
   LeafLabs

   anton,

   That seems reasonable. We saw your pull request this morning; thanks for the patch!

   Posted 4 years ago #

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