首页#if defined (STM32F10X_LD_VL) || (defined STM32F10X_MD_VL) || (defined STM32F10X_HD_VL) /* #define SYSCLK_FREQ_HSE HSE_VALUE */ #define SYSCLK_FREQ_24MHz 24000000 #else /* #define SYSCLK_FREQ_HSE HSE_VALUE */ /* #define SYSCLK_FREQ_24MHz 24000000 */ /* #define SYSCLK_FREQ_36MHz 36000000 */ /* #define SYSCLK_FREQ_48MHz 48000000 */ /* #define SYSCLK_FREQ_56MHz 56000000 */ #define SYSCLK_FREQ_72MHz 72000000 #endif

#if defined (STM32F10X_LD_VL) || (defined STM32F10X_MD_VL) || (defined STM32F10X_HD_VL) /* #define SYSCLK_FREQ_HSE HSE_VALUE / #define SYSCLK_FREQ_24MHz 24000000 #else / #define SYSCLK_FREQ_HSE HSE_VALUE / / #define SYSCLK_FREQ_24MHz 24000000 / / #define SYSCLK_FREQ_36MHz 36000000 / / #define SYSCLK_FREQ_48MHz 48000000 / / #define SYSCLK_FREQ_56MHz 56000000 */ #define SYSCLK_FREQ_72MHz 72000000 #endif

时间: 2024-01-24 08:19:43 浏览: 138

I2C.zip_STM3210E_STM32F10X.h_stm32_eval.h_stm32_eval_i2c__stm32f

I2C #include "stm32f10x.h" #include <stdlib.h> #include "stm32_eval_i2c_tsensor.h" #include "stm32_eval.h" #ifdef USE_STM32100E_EVAL #include "stm32100e_eval_lcd.h" #elif defined USE_STM3210E_EVAL #include "stm3210e_eval_lcd.h" #elif defined USE_STM32100B_EVAL #include "stm32100b_eval_lcd.h" #elif defined USE_STM3210B_EVAL #include "stm3210b_eval_lcd.h" #endif

这段代码是针对不同型号的 STM32 微控制器定义系统时钟频率的宏。如果当前使用的是 STM32F10X_LD_VL、STM32F10X_MD_VL 或者 STM32F10X_HD_VL 型号的微控制器，则将系统时钟频率定义为 24MHz。否则，将系统时钟频率定义为 72MHz。在注释中还给出了其他可能的时钟频率选项，但是被注释掉了。

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