\r\n#ifndef F_CPU\r\n #define F_CPU SystemCoreClock\r\n#endif\r\n<\/pre>\n\r\nvoid hw_config_init(void)\r\n{\r\n \/* Initialize the HAL *\/\r\n HAL_Init();\r\n\r\n \/* Configure the system clock *\/\r\n SystemClock_Config();\r\n}\r\n<\/pre>\n\r\n\/* The SystemCoreClock variable is updated in three ways:\r\n 1) by calling CMSIS function SystemCoreClockUpdate()\r\n 2) by calling HAL API function HAL_RCC_GetHCLKFreq()\r\n 3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency\r\n Note: If you use this function to configure the system clock; then there\r\n is no need to call the 2 first functions listed above, since SystemCoreClock\r\n variable is updated automatically.\r\n*\/\r\nuint32_t SystemCoreClock = 16000000UL;\r\n<\/pre>\n\r\nHAL_StatusTypeDef HAL_RCC_ClockConfig(RCC_ClkInitTypeDef *RCC_ClkInitStruct, uint32_t FLatency)\r\n{\r\n [...]\r\n\r\n \/* Update the SystemCoreClock global variable *\/\r\n SystemCoreClock = (HAL_RCC_GetSysClockFreq() >> ((AHBPrescTable[(RCC->CFGR & RCC_CFGR_HPRE) >> RCC_CFGR_HPRE_Pos]) & 0x1FU));\r\n\r\n \/* Configure the source of time base considering new system clocks settings*\/\r\n return HAL_InitTick(uwTickPrio);\r\n}\r\n<\/pre>\n\r\nvoid noOsSystickHandler() { } \/\/ empty\r\n\r\nvoid osSystickHandler() __attribute__((weak, alias("noOsSystickHandler")));\r\nvoid SysTick_Handler(void)\r\n{\r\n HAL_IncTick();\r\n HAL_SYSTICK_IRQHandler();\r\n osSystickHandler();\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"STM32G474RE SysTick_Config STM32G071RB Twice initialization Code HAL_Init():SystemCoreClock = 16’000’000 Hz = 16 MHz SystemClock_Config():SystemCoreClock = 64’000’000 Hz = 64 MHz #ifndef F_CPU #define F_CPU SystemCoreClock #endif void hw_config_init(void) { \/* Initialize the HAL *\/ HAL_Init(); \/* Configure the system clock *\/ SystemClock_Config(); } \/* The SystemCoreClock variable is updated in three ways: 1) by calling […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-12111","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/posts\/12111","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12111"}],"version-history":[{"count":12,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/posts\/12111\/revisions"}],"predecessor-version":[{"id":12689,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/posts\/12111\/revisions\/12689"}],"wp:attachment":[{"href":"https:\/\/blog.bachi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12111"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12111"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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