使用官方的例程
//#define SYSCLK_FREQ_8MHz_HSI? ? 8000000
//#define SYSCLK_FREQ_24MHZ_HSI? ?HSI_VALUE
? ?#define SYSCLK_FREQ_48MHZ_HSI? ?48000000
//#define SYSCLK_FREQ_8MHz_HSE? ? 8000000
//#define SYSCLK_FREQ_24MHz_HSE? ?HSE_VALUE
//#define SYSCLK_FREQ_48MHz_HSE? ?48000000
/* Clock Definitions */
#ifdef SYSCLK_FREQ_8MHz_HSI
? uint32_t SystemCoreClock? ? ? ? ?= SYSCLK_FREQ_8MHz_HSI;? ? ? ? ? /* System Clock Frequency (Core Clock) */
#elif defined SYSCLK_FREQ_24MHZ_HSI
? uint32_t SystemCoreClock? ? ? ? ?= SYSCLK_FREQ_24MHZ_HSI;? ? ? ? /* System Clock Frequency (Core Clock) */
#elif defined SYSCLK_FREQ_48MHZ_HSI
? uint32_t SystemCoreClock? ? ? ? ?= SYSCLK_FREQ_48MHZ_HSI;? ? ? ? /* System Clock Frequency (Core Clock) */
#elif defined SYSCLK_FREQ_8MHz_HSE
? uint32_t SystemCoreClock? ? ? ? ?= SYSCLK_FREQ_8MHz_HSE;? ? ? ? ?/* System Clock Frequency (Core Clock) */
#elif defined SYSCLK_FREQ_24MHz_HSE
? uint32_t SystemCoreClock? ? ? ? ?= SYSCLK_FREQ_24MHz_HSE;? ? ? ? /* System Clock Frequency (Core Clock) */
#elif defined SYSCLK_FREQ_48MHz_HSE
? uint32_t SystemCoreClock? ? ? ? ?= SYSCLK_FREQ_48MHz_HSE;? ? ? ? /* System Clock Frequency (Core Clock) */
#else
? uint32_t SystemCoreClock? ? ? ? ?= HSI_VALUE;
#endif
設置使用內部時鐘48M后,初始化USART_Printf_Init(460800),不成功,有人遇到過嗎?該怎么處理?