Marked possible code improvment for future activities:
parameters stored in the settings were not trusted. LastDive ID and Sample index are usually calculated at startup. This calculation could be avoided, nevertheless the implementation works => only TODO
Removed function without effect:
Calling writeblock with legth 0 has no effect
line source
/**+ −
******************************************************************************+ −
* @file system_stm32f4xx.c+ −
* @author MCD Application Team+ −
* @version V1.1.0+ −
* @date 26-June-2014+ −
* @brief CMSIS Cortex-M4 Device Peripheral Access Layer System Source File.+ −
*+ −
* This file provides two functions and one global variable to be called from + −
* user application:+ −
* - SystemInit(): This function is called at startup just after reset and + −
* before branch to main program. This call is made inside+ −
* the "startup_stm32f4xx.s" file.+ −
*+ −
* - SystemCoreClock variable: Contains the core clock (HCLK), it can be used+ −
* by the user application to setup the SysTick + −
* timer or configure other parameters.+ −
* + −
* - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must+ −
* be called whenever the core clock is changed+ −
* during program execution.+ −
*+ −
*+ −
******************************************************************************+ −
* @attention+ −
*+ −
* <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2>+ −
*+ −
* Redistribution and use in source and binary forms, with or without modification,+ −
* are permitted provided that the following conditions are met:+ −
* 1. Redistributions of source code must retain the above copyright notice,+ −
* this list of conditions and the following disclaimer.+ −
* 2. Redistributions in binary form must reproduce the above copyright notice,+ −
* this list of conditions and the following disclaimer in the documentation+ −
* and/or other materials provided with the distribution.+ −
* 3. Neither the name of STMicroelectronics nor the names of its contributors+ −
* may be used to endorse or promote products derived from this software+ −
* without specific prior written permission.+ −
*+ −
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"+ −
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE+ −
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE+ −
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE+ −
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL+ −
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR+ −
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER+ −
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,+ −
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE+ −
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.+ −
*+ −
******************************************************************************+ −
*/+ −
+ −
/** @addtogroup CMSIS+ −
* @{+ −
*/+ −
+ −
/** @addtogroup stm32f4xx_system+ −
* @{+ −
*/ + −
+ −
/** @addtogroup STM32F4xx_System_Private_Includes+ −
* @{+ −
*/+ −
+ −
#include <stdint.h>+ −
+ −
#include "stm32f4xx_hal.h"+ −
+ −
#if !defined (HSE_VALUE) + −
#define HSE_VALUE ((uint32_t)8000000) /*!< Default value of the External oscillator in Hz */+ −
#endif /* HSE_VALUE */+ −
+ −
#if !defined (HSI_VALUE)+ −
#define HSI_VALUE ((uint32_t)16000000) /*!< Value of the Internal oscillator in Hz*/+ −
#endif /* HSI_VALUE */+ −
+ −
/**+ −
* @}+ −
*/+ −
+ −
/** @addtogroup STM32F4xx_System_Private_TypesDefinitions+ −
* @{+ −
*/+ −
+ −
/**+ −
* @}+ −
*/+ −
+ −
/** @addtogroup STM32F4xx_System_Private_Defines+ −
* @{+ −
*/+ −
+ −
/************************* Miscellaneous Configuration ************************/+ −
+ −
/*!< Uncomment the following line if you need to relocate your vector Table in+ −
Internal SRAM. */+ −
/* #define VECT_TAB_SRAM */+ −
#define VECT_TAB_OFFSET 0x00 /*!< Vector Table base offset field. + −
This value must be a multiple of 0x200. */+ −
/******************************************************************************/+ −
+ −
/**+ −
* @}+ −
*/+ −
+ −
/** @addtogroup STM32F4xx_System_Private_Macros+ −
* @{+ −
*/+ −
+ −
/**+ −
* @}+ −
*/+ −
+ −
/** @addtogroup STM32F4xx_System_Private_Variables+ −
* @{+ −
*/+ −
/* This variable is updated in three ways:+ −
1) by calling CMSIS function SystemCoreClockUpdate()+ −
2) by calling HAL API function HAL_RCC_GetHCLKFreq()+ −
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency + −
Note: If you use this function to configure the system clock; then there+ −
is no need to call the 2 first functions listed above, since SystemCoreClock+ −
variable is updated automatically.+ −
*/+ −
uint32_t SystemCoreClock = 16000000;+ −
const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};+ −
const uint8_t APBPrescTable[8] = {0, 0, 0, 0, 1, 2, 3, 4};+ −
/**+ −
* @}+ −
*/+ −
+ −
/** @addtogroup STM32F4xx_System_Private_FunctionPrototypes+ −
* @{+ −
*/+ −
+ −
/**+ −
* @}+ −
*/+ −
+ −
/** @addtogroup STM32F4xx_System_Private_Functions+ −
* @{+ −
*/+ −
+ −
/**+ −
* @brief Setup the microcontroller system+ −
* Initialize the FPU setting, vector table location and External memory + −
* configuration.+ −
* @param None+ −
* @retval None+ −
*/+ −
void SystemInit(void)+ −
{+ −
/* FPU settings ------------------------------------------------------------*/+ −
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)+ −
SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */+ −
#endif+ −
/* Reset the RCC clock configuration to the default reset state ------------*/+ −
/* Set HSION bit */+ −
RCC->CR |= (uint32_t)0x00000001;+ −
+ −
/* Reset CFGR register */+ −
RCC->CFGR = 0x00000000;+ −
+ −
/* Reset HSEON, CSSON and PLLON bits */+ −
RCC->CR &= (uint32_t)0xFEF6FFFF;+ −
+ −
/* Reset PLLCFGR register */+ −
RCC->PLLCFGR = 0x24003010;+ −
+ −
/* Reset HSEBYP bit */+ −
RCC->CR &= (uint32_t)0xFFFBFFFF;+ −
+ −
/* Disable all interrupts */+ −
RCC->CIR = 0x00000000;+ −
+ −
/* Configure the Vector Table location add offset address ------------------*/+ −
#ifdef VECT_TAB_SRAM+ −
SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */+ −
#else+ −
SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */+ −
#endif+ −
}+ −
+ −
/**+ −
* @brief Update SystemCoreClock variable according to Clock Register Values.+ −
* The SystemCoreClock variable contains the core clock (HCLK), it can+ −
* be used by the user application to setup the SysTick timer or configure+ −
* other parameters.+ −
* + −
* @note Each time the core clock (HCLK) changes, this function must be called+ −
* to update SystemCoreClock variable value. Otherwise, any configuration+ −
* based on this variable will be incorrect. + −
* + −
* @note - The system frequency computed by this function is not the real + −
* frequency in the chip. It is calculated based on the predefined + −
* constant and the selected clock source:+ −
* + −
* - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)+ −
* + −
* - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**)+ −
* + −
* - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**) + −
* or HSI_VALUE(*) multiplied/divided by the PLL factors.+ −
* + −
* (*) HSI_VALUE is a constant defined in stm32f4xx_hal_conf.h file (default value+ −
* 16 MHz) but the real value may vary depending on the variations+ −
* in voltage and temperature. + −
* + −
* (**) HSE_VALUE is a constant defined in stm32f4xx_hal_conf.h file (its value+ −
* depends on the application requirements), user has to ensure that HSE_VALUE+ −
* is same as the real frequency of the crystal used. Otherwise, this function+ −
* may have wrong result.+ −
* + −
* - The result of this function could be not correct when using fractional+ −
* value for HSE crystal.+ −
* + −
* @param None+ −
* @retval None+ −
*/+ −
void SystemCoreClockUpdate(void)+ −
{+ −
uint32_t tmp = 0, pllvco = 0, pllp = 2, pllsource = 0, pllm = 2;+ −
+ −
/* Get SYSCLK source -------------------------------------------------------*/+ −
tmp = RCC->CFGR & RCC_CFGR_SWS;+ −
+ −
switch (tmp)+ −
{+ −
case 0x00: /* HSI used as system clock source */+ −
SystemCoreClock = HSI_VALUE;+ −
break;+ −
case 0x04: /* HSE used as system clock source */+ −
SystemCoreClock = HSE_VALUE;+ −
break;+ −
case 0x08: /* PLL used as system clock source */+ −
+ −
/* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLL_M) * PLL_N+ −
SYSCLK = PLL_VCO / PLL_P+ −
*/ + −
pllsource = (RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) >> 22;+ −
pllm = RCC->PLLCFGR & RCC_PLLCFGR_PLLM;+ −
+ −
if (pllsource != 0)+ −
{+ −
/* HSE used as PLL clock source */+ −
pllvco = (HSE_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 6);+ −
}+ −
else+ −
{+ −
/* HSI used as PLL clock source */+ −
pllvco = (HSI_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 6);+ −
}+ −
+ −
pllp = (((RCC->PLLCFGR & RCC_PLLCFGR_PLLP) >>16) + 1 ) *2;+ −
SystemCoreClock = pllvco/pllp;+ −
break;+ −
default:+ −
SystemCoreClock = HSI_VALUE;+ −
break;+ −
}+ −
/* Compute HCLK frequency --------------------------------------------------*/+ −
/* Get HCLK prescaler */+ −
tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];+ −
/* HCLK frequency */+ −
SystemCoreClock >>= tmp;+ −
}+ −
+ −
/**+ −
* @}+ −
*/+ −
+ −
/**+ −
* @}+ −
*/+ −
+ −
/**+ −
* @}+ −
*/ + −
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/+ −