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@@ -18,36 +18,51 @@
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* reset the HSI is used as SYSCLK source).
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* If none of the define below is enabled, the HSI is used as System clock source.
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*/
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// #define SYSCLK_FREQ_HSE HSE_VALUE
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/* #define SYSCLK_FREQ_24MHz 24000000 */
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//#define SYSCLK_FREQ_48MHz 48000000
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/* #define SYSCLK_FREQ_56MHz 56000000 */
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//#define SYSCLK_FREQ_72MHz 72000000
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#define SYSCLK_FREQ_96MHz 96000000
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//#define SYSCLK_FREQ_120MHz 120000000
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//#define SYSCLK_FREQ_144MHz 144000000
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//#define SYSCLK_FREQ_HSE HSE_VALUE
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//#define SYSCLK_FREQ_48MHz_HSE 48000000
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//#define SYSCLK_FREQ_56MHz_HSE 56000000
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//#define SYSCLK_FREQ_72MHz_HSE 72000000
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#define SYSCLK_FREQ_96MHz_HSE 96000000
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//#define SYSCLK_FREQ_120MHz_HSE 120000000
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//#define SYSCLK_FREQ_144MHz_HSE 144000000
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//#define SYSCLK_FREQ_HSI HSI_VALUE
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//#define SYSCLK_FREQ_48MHz_HSI 48000000
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//#define SYSCLK_FREQ_56MHz_HSI 56000000
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//#define SYSCLK_FREQ_72MHz_HSI 72000000
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//#define SYSCLK_FREQ_96MHz_HSI 96000000
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//#define SYSCLK_FREQ_120MHz_HSI 120000000
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//#define SYSCLK_FREQ_144MHz_HSI 144000000
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/* Clock Definitions */
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#ifdef SYSCLK_FREQ_HSE
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uint32_t SystemCoreClock = SYSCLK_FREQ_HSE; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_24MHz
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uint32_t SystemCoreClock = SYSCLK_FREQ_24MHz; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_48MHz
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uint32_t SystemCoreClock = SYSCLK_FREQ_48MHz; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_56MHz
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uint32_t SystemCoreClock = SYSCLK_FREQ_56MHz; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_72MHz
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uint32_t SystemCoreClock = SYSCLK_FREQ_72MHz; /* System Clock Frequency (Core Clock) */
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uint32_t SystemCoreClock = SYSCLK_FREQ_HSE; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_48MHz_HSE
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uint32_t SystemCoreClock = SYSCLK_FREQ_48MHz_HSE; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_56MHz_HSE
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uint32_t SystemCoreClock = SYSCLK_FREQ_56MHz_HSE; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_72MHz_HSE
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uint32_t SystemCoreClock = SYSCLK_FREQ_72MHz_HSE; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_96MHz_HSE
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uint32_t SystemCoreClock = SYSCLK_FREQ_96MHz_HSE; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_120MHz_HSE
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uint32_t SystemCoreClock = SYSCLK_FREQ_120MHz_HSE; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_144MHz_HSE
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uint32_t SystemCoreClock = SYSCLK_FREQ_144MHz_HSE; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_48MHz_HSI
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uint32_t SystemCoreClock = SYSCLK_FREQ_48MHz_HSI; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_56MHz_HSI
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uint32_t SystemCoreClock = SYSCLK_FREQ_56MHz_HSI; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_72MHz_HSI
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uint32_t SystemCoreClock = SYSCLK_FREQ_72MHz_HSI; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_96MHz_HSI
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uint32_t SystemCoreClock = SYSCLK_FREQ_96MHz_HSI; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_120MHz_HSI
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uint32_t SystemCoreClock = SYSCLK_FREQ_120MHz_HSI; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_144MHz_HSI
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uint32_t SystemCoreClock = SYSCLK_FREQ_144MHz_HSI; /* System Clock Frequency (Core Clock) */
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#else
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uint32_t SystemCoreClock = HSI_VALUE; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_96MHz
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uint32_t SystemCoreClock = SYSCLK_FREQ_96MHz; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_120MHz
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uint32_t SystemCoreClock = SYSCLK_FREQ_120MHz; /* System Clock Frequency (Core Clock) */
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#elif defined SYSCLK_FREQ_144MHz
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uint32_t SystemCoreClock = SYSCLK_FREQ_144MHz; /* System Clock Frequency (Core Clock) */
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#else /* HSI Selected as System Clock source */
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uint32_t SystemCoreClock = HSI_VALUE; /* System Clock Frequency (Core Clock) */
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#endif
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__I uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
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@@ -57,26 +72,34 @@ __I uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9}
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static void SetSysClock(void);
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#ifdef SYSCLK_FREQ_HSE
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static void SetSysClockToHSE(void);
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#elif defined SYSCLK_FREQ_24MHz
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static void SetSysClockTo24(void);
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#elif defined SYSCLK_FREQ_48MHz
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static void SetSysClockTo48(void);
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#elif defined SYSCLK_FREQ_56MHz
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static void SetSysClockTo56(void);
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#elif defined SYSCLK_FREQ_72MHz
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static void SetSysClockTo72(void);
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#elif defined SYSCLK_FREQ_96MHz
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static void SetSysClockTo96(void);
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#elif defined SYSCLK_FREQ_120MHz
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static void SetSysClockTo120(void);
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#elif defined SYSCLK_FREQ_144MHz
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static void SetSysClockTo144(void);
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static void SetSysClockToHSE( void );
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#elif defined SYSCLK_FREQ_48MHz_HSE
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static void SetSysClockTo48_HSE( void );
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#elif defined SYSCLK_FREQ_56MHz_HSE
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static void SetSysClockTo56_HSE( void );
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#elif defined SYSCLK_FREQ_72MHz_HSE
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static void SetSysClockTo72_HSE( void );
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#elif defined SYSCLK_FREQ_96MHz_HSE
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static void SetSysClockTo96_HSE( void );
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#elif defined SYSCLK_FREQ_120MHz_HSE
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static void SetSysClockTo120_HSE( void );
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#elif defined SYSCLK_FREQ_144MHz_HSE
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static void SetSysClockTo144_HSE( void );
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#elif defined SYSCLK_FREQ_48MHz_HSI
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static void SetSysClockTo48_HSI( void );
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#elif defined SYSCLK_FREQ_56MHz_HSI
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static void SetSysClockTo56_HSI( void );
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#elif defined SYSCLK_FREQ_72MHz_HSI
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static void SetSysClockTo72_HSI( void );
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#elif defined SYSCLK_FREQ_96MHz_HSI
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static void SetSysClockTo96_HSI( void );
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#elif defined SYSCLK_FREQ_120MHz_HSI
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static void SetSysClockTo120_HSI( void );
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#elif defined SYSCLK_FREQ_144MHz_HSI
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static void SetSysClockTo144_HSI( void );
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#endif
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/*********************************************************************
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* @fn SystemInit
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*
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@@ -183,23 +206,31 @@ void SystemCoreClockUpdate (void)
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static void SetSysClock(void)
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{
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#ifdef SYSCLK_FREQ_HSE
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SetSysClockToHSE();
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#elif defined SYSCLK_FREQ_24MHz
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SetSysClockTo24();
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#elif defined SYSCLK_FREQ_48MHz
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SetSysClockTo48();
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#elif defined SYSCLK_FREQ_56MHz
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SetSysClockTo56();
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#elif defined SYSCLK_FREQ_72MHz
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SetSysClockTo72();
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#elif defined SYSCLK_FREQ_96MHz
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SetSysClockTo96();
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#elif defined SYSCLK_FREQ_120MHz
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SetSysClockTo120();
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#elif defined SYSCLK_FREQ_144MHz
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SetSysClockTo144();
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SetSysClockToHSE();
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#elif defined SYSCLK_FREQ_48MHz_HSE
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SetSysClockTo48_HSE();
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#elif defined SYSCLK_FREQ_56MHz_HSE
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SetSysClockTo56_HSE();
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#elif defined SYSCLK_FREQ_72MHz_HSE
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SetSysClockTo72_HSE();
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#elif defined SYSCLK_FREQ_96MHz_HSE
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SetSysClockTo96_HSE();
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#elif defined SYSCLK_FREQ_120MHz_HSE
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SetSysClockTo120_HSE();
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#elif defined SYSCLK_FREQ_144MHz_HSE
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SetSysClockTo144_HSE();
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#elif defined SYSCLK_FREQ_48MHz_HSI
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SetSysClockTo48_HSI();
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#elif defined SYSCLK_FREQ_56MHz_HSI
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SetSysClockTo56_HSI();
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#elif defined SYSCLK_FREQ_72MHz_HSI
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SetSysClockTo72_HSI();
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#elif defined SYSCLK_FREQ_96MHz_HSI
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SetSysClockTo96_HSI();
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#elif defined SYSCLK_FREQ_120MHz_HSI
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SetSysClockTo120_HSI();
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#elif defined SYSCLK_FREQ_144MHz_HSI
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SetSysClockTo144_HSI();
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#endif
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@@ -243,10 +274,7 @@ static void SetSysClockToHSE(void)
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if (HSEStatus == (uint32_t)0x01)
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{
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/* HCLK = SYSCLK */
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/* HCLK = SYSCLK */
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RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;
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/* PCLK2 = HCLK */
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RCC->CFGR0 |= (uint32_t)RCC_PPRE2_DIV1;
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@@ -274,90 +302,16 @@ static void SetSysClockToHSE(void)
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}
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}
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#elif defined SYSCLK_FREQ_24MHz
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#elif defined SYSCLK_FREQ_48MHz_HSE
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/*********************************************************************
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* @fn SetSysClockTo24
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*
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* @brief Sets System clock frequency to 24MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
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*
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* @return none
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*/
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static void SetSysClockTo24(void)
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{
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__IO uint32_t StartUpCounter = 0, HSEStatus = 0;
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RCC->CTLR |= ((uint32_t)RCC_HSEON);
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/* Wait till HSE is ready and if Time out is reached exit */
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do
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{
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HSEStatus = RCC->CTLR & RCC_HSERDY;
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StartUpCounter++;
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} while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
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if ((RCC->CTLR & RCC_HSERDY) != RESET)
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{
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HSEStatus = (uint32_t)0x01;
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}
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else
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{
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HSEStatus = (uint32_t)0x00;
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}
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if (HSEStatus == (uint32_t)0x01)
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{
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/* HCLK = SYSCLK */
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RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;
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/* PCLK2 = HCLK */
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RCC->CFGR0 |= (uint32_t)RCC_PPRE2_DIV1;
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/* PCLK1 = HCLK */
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RCC->CFGR0 |= (uint32_t)RCC_PPRE1_DIV1;
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/* CH32V20x_D6-PLL configuration: PLLCLK = HSE * 3 = 24 MHz (HSE=8MHZ)
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* CH32V20x_D8-PLL configuration: PLLCLK = HSE/4 * 3 = 24 MHz (HSE=32MHZ)
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* CH32V20x_D8W-PLL configuration: PLLCLK = HSE/4 * 3 = 24 MHz (HSE=32MHZ)
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*/
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RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_PLLSRC | RCC_PLLXTPRE | RCC_PLLMULL));
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RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSE | RCC_PLLXTPRE_HSE | RCC_PLLMULL3);
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/* Enable PLL */
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RCC->CTLR |= RCC_PLLON;
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/* Wait till PLL is ready */
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while((RCC->CTLR & RCC_PLLRDY) == 0)
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{
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}
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/* Select PLL as system clock source */
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RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_SW));
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RCC->CFGR0 |= (uint32_t)RCC_SW_PLL;
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/* Wait till PLL is used as system clock source */
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while ((RCC->CFGR0 & (uint32_t)RCC_SWS) != (uint32_t)0x08)
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{
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}
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}
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else
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{
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/* If HSE fails to start-up, the application will have wrong clock
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* configuration. User can add here some code to deal with this error
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*/
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}
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}
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#elif defined SYSCLK_FREQ_48MHz
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/*********************************************************************
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* @fn SetSysClockTo48
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* @fn SetSysClockTo48_HSE
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*
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* @brief Sets System clock frequency to 48MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
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*
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* @return none
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*/
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static void SetSysClockTo48(void)
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static void SetSysClockTo48_HSE(void)
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{
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__IO uint32_t StartUpCounter = 0, HSEStatus = 0;
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@@ -381,11 +335,6 @@ static void SetSysClockTo48(void)
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if (HSEStatus == (uint32_t)0x01)
|
|
|
|
|
{
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* HCLK = SYSCLK */
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;
|
|
|
|
|
/* PCLK2 = HCLK */
|
|
|
|
@@ -424,16 +373,16 @@ static void SetSysClockTo48(void)
|
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|
|
}
|
|
|
|
|
}
|
|
|
|
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|
|
#elif defined SYSCLK_FREQ_56MHz
|
|
|
|
|
#elif defined SYSCLK_FREQ_56MHz_HSE
|
|
|
|
|
|
|
|
|
|
/*********************************************************************
|
|
|
|
|
* @fn SetSysClockTo56
|
|
|
|
|
* @fn SetSysClockTo56_HSE
|
|
|
|
|
*
|
|
|
|
|
* @brief Sets System clock frequency to 56MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
|
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|
|
|
*
|
|
|
|
|
* @return none
|
|
|
|
|
*/
|
|
|
|
|
static void SetSysClockTo56(void)
|
|
|
|
|
static void SetSysClockTo56_HSE(void)
|
|
|
|
|
{
|
|
|
|
|
__IO uint32_t StartUpCounter = 0, HSEStatus = 0;
|
|
|
|
|
|
|
|
|
@@ -457,11 +406,6 @@ static void SetSysClockTo56(void)
|
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|
|
if (HSEStatus == (uint32_t)0x01)
|
|
|
|
|
{
|
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|
|
|
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|
|
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|
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|
|
|
|
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|
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|
|
|
|
|
/* HCLK = SYSCLK */
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;
|
|
|
|
|
/* PCLK2 = HCLK */
|
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|
|
@@ -501,16 +445,16 @@ static void SetSysClockTo56(void)
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|
}
|
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|
|
}
|
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|
#elif defined SYSCLK_FREQ_72MHz
|
|
|
|
|
#elif defined SYSCLK_FREQ_72MHz_HSE
|
|
|
|
|
|
|
|
|
|
/*********************************************************************
|
|
|
|
|
* @fn SetSysClockTo72
|
|
|
|
|
* @fn SetSysClockTo72_HSE
|
|
|
|
|
*
|
|
|
|
|
* @brief Sets System clock frequency to 72MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
|
|
|
|
|
*
|
|
|
|
|
* @return none
|
|
|
|
|
*/
|
|
|
|
|
static void SetSysClockTo72(void)
|
|
|
|
|
static void SetSysClockTo72_HSE(void)
|
|
|
|
|
{
|
|
|
|
|
__IO uint32_t StartUpCounter = 0, HSEStatus = 0;
|
|
|
|
|
|
|
|
|
@@ -534,11 +478,6 @@ static void SetSysClockTo72(void)
|
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|
|
|
|
|
|
|
|
if (HSEStatus == (uint32_t)0x01)
|
|
|
|
|
{
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* HCLK = SYSCLK */
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;
|
|
|
|
|
/* PCLK2 = HCLK */
|
|
|
|
@@ -579,16 +518,16 @@ static void SetSysClockTo72(void)
|
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|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#elif defined SYSCLK_FREQ_96MHz
|
|
|
|
|
#elif defined SYSCLK_FREQ_96MHz_HSE
|
|
|
|
|
|
|
|
|
|
/*********************************************************************
|
|
|
|
|
* @fn SetSysClockTo96
|
|
|
|
|
* @fn SetSysClockTo96_HSE
|
|
|
|
|
*
|
|
|
|
|
* @brief Sets System clock frequency to 96MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
|
|
|
|
|
*
|
|
|
|
|
* @return none
|
|
|
|
|
*/
|
|
|
|
|
static void SetSysClockTo96(void)
|
|
|
|
|
static void SetSysClockTo96_HSE(void)
|
|
|
|
|
{
|
|
|
|
|
__IO uint32_t StartUpCounter = 0, HSEStatus = 0;
|
|
|
|
|
|
|
|
|
@@ -612,11 +551,6 @@ static void SetSysClockTo96(void)
|
|
|
|
|
|
|
|
|
|
if (HSEStatus == (uint32_t)0x01)
|
|
|
|
|
{
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* HCLK = SYSCLK */
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;
|
|
|
|
|
/* PCLK2 = HCLK */
|
|
|
|
@@ -657,16 +591,16 @@ static void SetSysClockTo96(void)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#elif defined SYSCLK_FREQ_120MHz
|
|
|
|
|
#elif defined SYSCLK_FREQ_120MHz_HSE
|
|
|
|
|
|
|
|
|
|
/*********************************************************************
|
|
|
|
|
* @fn SetSysClockTo120
|
|
|
|
|
* @fn SetSysClockTo120_HSE
|
|
|
|
|
*
|
|
|
|
|
* @brief Sets System clock frequency to 120MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
|
|
|
|
|
*
|
|
|
|
|
* @return none
|
|
|
|
|
*/
|
|
|
|
|
static void SetSysClockTo120(void)
|
|
|
|
|
static void SetSysClockTo120_HSE(void)
|
|
|
|
|
{
|
|
|
|
|
__IO uint32_t StartUpCounter = 0, HSEStatus = 0;
|
|
|
|
|
|
|
|
|
@@ -734,18 +668,16 @@ static void SetSysClockTo120(void)
|
|
|
|
|
*/
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#elif defined SYSCLK_FREQ_144MHz
|
|
|
|
|
#elif defined SYSCLK_FREQ_144MHz_HSE
|
|
|
|
|
|
|
|
|
|
/*********************************************************************
|
|
|
|
|
* @fn SetSysClockTo144
|
|
|
|
|
* @fn SetSysClockTo144_HSE
|
|
|
|
|
*
|
|
|
|
|
* @brief Sets System clock frequency to 144MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
|
|
|
|
|
*
|
|
|
|
|
* @return none
|
|
|
|
|
*/
|
|
|
|
|
static void SetSysClockTo144(void)
|
|
|
|
|
static void SetSysClockTo144_HSE(void)
|
|
|
|
|
{
|
|
|
|
|
__IO uint32_t StartUpCounter = 0, HSEStatus = 0;
|
|
|
|
|
|
|
|
|
@@ -769,11 +701,6 @@ static void SetSysClockTo144(void)
|
|
|
|
|
|
|
|
|
|
if (HSEStatus == (uint32_t)0x01)
|
|
|
|
|
{
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* HCLK = SYSCLK */
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;
|
|
|
|
|
/* PCLK2 = HCLK */
|
|
|
|
@@ -813,7 +740,247 @@ static void SetSysClockTo144(void)
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#elif defined SYSCLK_FREQ_48MHz_HSI
|
|
|
|
|
|
|
|
|
|
/*********************************************************************
|
|
|
|
|
* @fn SetSysClockTo48_HSI
|
|
|
|
|
*
|
|
|
|
|
* @brief Sets System clock frequency to 48MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
|
|
|
|
|
*
|
|
|
|
|
* @return none
|
|
|
|
|
*/
|
|
|
|
|
static void SetSysClockTo48_HSI(void)
|
|
|
|
|
{
|
|
|
|
|
EXTEN->EXTEN_CTR |= EXTEN_PLL_HSI_PRE;
|
|
|
|
|
|
|
|
|
|
/* HCLK = SYSCLK */
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;
|
|
|
|
|
/* PCLK2 = HCLK */
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_PPRE2_DIV1;
|
|
|
|
|
/* PCLK1 = HCLK */
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_PPRE1_DIV2;
|
|
|
|
|
|
|
|
|
|
/* PLL configuration: PLLCLK = HSI * 6 = 48 MHz */
|
|
|
|
|
RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_PLLSRC | RCC_PLLXTPRE | RCC_PLLMULL));
|
|
|
|
|
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSI_Div2 | RCC_PLLMULL6);
|
|
|
|
|
|
|
|
|
|
/* Enable PLL */
|
|
|
|
|
RCC->CTLR |= RCC_PLLON;
|
|
|
|
|
/* Wait till PLL is ready */
|
|
|
|
|
while((RCC->CTLR & RCC_PLLRDY) == 0)
|
|
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
/* Select PLL as system clock source */
|
|
|
|
|
RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_SW));
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_SW_PLL;
|
|
|
|
|
/* Wait till PLL is used as system clock source */
|
|
|
|
|
while ((RCC->CFGR0 & (uint32_t)RCC_SWS) != (uint32_t)0x08)
|
|
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#elif defined SYSCLK_FREQ_56MHz_HSI
|
|
|
|
|
|
|
|
|
|
/*********************************************************************
|
|
|
|
|
* @fn SetSysClockTo56_HSI
|
|
|
|
|
*
|
|
|
|
|
* @brief Sets System clock frequency to 56MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
|
|
|
|
|
*
|
|
|
|
|
* @return none
|
|
|
|
|
*/
|
|
|
|
|
static void SetSysClockTo56_HSI(void)
|
|
|
|
|
{
|
|
|
|
|
EXTEN->EXTEN_CTR |= EXTEN_PLL_HSI_PRE;
|
|
|
|
|
|
|
|
|
|
/* HCLK = SYSCLK */
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;
|
|
|
|
|
/* PCLK2 = HCLK */
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_PPRE2_DIV1;
|
|
|
|
|
/* PCLK1 = HCLK */
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_PPRE1_DIV2;
|
|
|
|
|
|
|
|
|
|
/* PLL configuration: PLLCLK = HSI * 7 = 48 MHz */
|
|
|
|
|
RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_PLLSRC | RCC_PLLXTPRE | RCC_PLLMULL));
|
|
|
|
|
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSI_Div2 | RCC_PLLMULL7);
|
|
|
|
|
|
|
|
|
|
/* Enable PLL */
|
|
|
|
|
RCC->CTLR |= RCC_PLLON;
|
|
|
|
|
/* Wait till PLL is ready */
|
|
|
|
|
while((RCC->CTLR & RCC_PLLRDY) == 0)
|
|
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
/* Select PLL as system clock source */
|
|
|
|
|
RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_SW));
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_SW_PLL;
|
|
|
|
|
/* Wait till PLL is used as system clock source */
|
|
|
|
|
while ((RCC->CFGR0 & (uint32_t)RCC_SWS) != (uint32_t)0x08)
|
|
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#elif defined SYSCLK_FREQ_72MHz_HSI
|
|
|
|
|
|
|
|
|
|
/*********************************************************************
|
|
|
|
|
* @fn SetSysClockTo72_HSI
|
|
|
|
|
*
|
|
|
|
|
* @brief Sets System clock frequency to 72MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
|
|
|
|
|
*
|
|
|
|
|
* @return none
|
|
|
|
|
*/
|
|
|
|
|
static void SetSysClockTo72_HSI(void)
|
|
|
|
|
{
|
|
|
|
|
EXTEN->EXTEN_CTR |= EXTEN_PLL_HSI_PRE;
|
|
|
|
|
|
|
|
|
|
/* HCLK = SYSCLK */
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;
|
|
|
|
|
/* PCLK2 = HCLK */
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_PPRE2_DIV1;
|
|
|
|
|
/* PCLK1 = HCLK */
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_PPRE1_DIV2;
|
|
|
|
|
|
|
|
|
|
/* PLL configuration: PLLCLK = HSI * 9 = 72 MHz */
|
|
|
|
|
RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_PLLSRC | RCC_PLLXTPRE | RCC_PLLMULL));
|
|
|
|
|
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSI_Div2 | RCC_PLLMULL9);
|
|
|
|
|
|
|
|
|
|
/* Enable PLL */
|
|
|
|
|
RCC->CTLR |= RCC_PLLON;
|
|
|
|
|
/* Wait till PLL is ready */
|
|
|
|
|
while((RCC->CTLR & RCC_PLLRDY) == 0)
|
|
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
/* Select PLL as system clock source */
|
|
|
|
|
RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_SW));
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_SW_PLL;
|
|
|
|
|
/* Wait till PLL is used as system clock source */
|
|
|
|
|
while ((RCC->CFGR0 & (uint32_t)RCC_SWS) != (uint32_t)0x08)
|
|
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#elif defined SYSCLK_FREQ_96MHz_HSI
|
|
|
|
|
|
|
|
|
|
/*********************************************************************
|
|
|
|
|
* @fn SetSysClockTo96_HSI
|
|
|
|
|
*
|
|
|
|
|
* @brief Sets System clock frequency to 96MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
|
|
|
|
|
*
|
|
|
|
|
* @return none
|
|
|
|
|
*/
|
|
|
|
|
static void SetSysClockTo96_HSI(void)
|
|
|
|
|
{
|
|
|
|
|
EXTEN->EXTEN_CTR |= EXTEN_PLL_HSI_PRE;
|
|
|
|
|
|
|
|
|
|
/* HCLK = SYSCLK */
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;
|
|
|
|
|
/* PCLK2 = HCLK */
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_PPRE2_DIV1;
|
|
|
|
|
/* PCLK1 = HCLK */
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_PPRE1_DIV2;
|
|
|
|
|
|
|
|
|
|
/* PLL configuration: PLLCLK = HSI * 12 = 96 MHz */
|
|
|
|
|
RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_PLLSRC | RCC_PLLXTPRE | RCC_PLLMULL));
|
|
|
|
|
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSI_Div2 | RCC_PLLMULL12);
|
|
|
|
|
|
|
|
|
|
/* Enable PLL */
|
|
|
|
|
RCC->CTLR |= RCC_PLLON;
|
|
|
|
|
/* Wait till PLL is ready */
|
|
|
|
|
while((RCC->CTLR & RCC_PLLRDY) == 0)
|
|
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
/* Select PLL as system clock source */
|
|
|
|
|
RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_SW));
|
|
|
|
|
RCC->CFGR0 |= (uint32_t)RCC_SW_PLL;
|
|
|
|
|
/* Wait till PLL is used as system clock source */
|
|
|
|
|
while ((RCC->CFGR0 & (uint32_t)RCC_SWS) != (uint32_t)0x08)
|
|
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#elif defined SYSCLK_FREQ_120MHz_HSI
|
|
|
|
|
|
|
|
|
|
/*********************************************************************
|
|
|
|
|
* @fn SetSysClockTo120_HSI
|
|
|
|
|
*
|
|
|
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* @brief Sets System clock frequency to 120MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
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*
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* @return none
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*/
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static void SetSysClockTo120_HSI(void)
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{
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EXTEN->EXTEN_CTR |= EXTEN_PLL_HSI_PRE;
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/* HCLK = SYSCLK */
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RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;
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/* PCLK2 = HCLK */
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RCC->CFGR0 |= (uint32_t)RCC_PPRE2_DIV1;
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/* PCLK1 = HCLK */
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RCC->CFGR0 |= (uint32_t)RCC_PPRE1_DIV2;
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/* PLL configuration: PLLCLK = HSI * 15 = 120 MHz */
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RCC->CFGR0 &= (uint32_t)((uint32_t) ~(RCC_PLLSRC | RCC_PLLXTPRE |
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RCC_PLLMULL));
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RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSI_Div2 | RCC_PLLMULL15);
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/* Enable PLL */
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RCC->CTLR |= RCC_PLLON;
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/* Wait till PLL is ready */
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while((RCC->CTLR & RCC_PLLRDY) == 0)
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{
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}
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/* Select PLL as system clock source */
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RCC->CFGR0 &= (uint32_t)((uint32_t) ~(RCC_SW));
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RCC->CFGR0 |= (uint32_t)RCC_SW_PLL;
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/* Wait till PLL is used as system clock source */
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while((RCC->CFGR0 & (uint32_t)RCC_SWS) != (uint32_t)0x08)
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{
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}
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}
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#elif defined SYSCLK_FREQ_144MHz_HSI
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/*********************************************************************
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* @fn SetSysClockTo144_HSI
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*
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* @brief Sets System clock frequency to 144MHz and configure HCLK, PCLK2 and PCLK1 prescalers.
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*
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* @return none
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*/
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static void SetSysClockTo144_HSI(void)
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{
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EXTEN->EXTEN_CTR |= EXTEN_PLL_HSI_PRE;
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/* HCLK = SYSCLK */
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RCC->CFGR0 |= (uint32_t)RCC_HPRE_DIV1;
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/* PCLK2 = HCLK */
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RCC->CFGR0 |= (uint32_t)RCC_PPRE2_DIV1;
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/* PCLK1 = HCLK */
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RCC->CFGR0 |= (uint32_t)RCC_PPRE1_DIV2;
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/* PLL configuration: PLLCLK = HSI * 18 = 144 MHz */
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RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_PLLSRC | RCC_PLLXTPRE | RCC_PLLMULL));
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RCC->CFGR0 |= (uint32_t)(RCC_PLLSRC_HSI_Div2 | RCC_PLLMULL18);
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/* Enable PLL */
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RCC->CTLR |= RCC_PLLON;
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/* Wait till PLL is ready */
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while((RCC->CTLR & RCC_PLLRDY) == 0)
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{
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}
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/* Select PLL as system clock source */
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RCC->CFGR0 &= (uint32_t)((uint32_t)~(RCC_SW));
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RCC->CFGR0 |= (uint32_t)RCC_SW_PLL;
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/* Wait till PLL is used as system clock source */
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while ((RCC->CFGR0 & (uint32_t)RCC_SWS) != (uint32_t)0x08)
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{
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}
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}
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#endif
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