stm32读取SD2505API-G时钟芯片

野性酷女 2022-12-26 04:59 179阅读 0赞

STM32的延时写法  
使用\_\_NOP()函数，因为使用了8M晶振9倍频，72MHz，所以一个nop约等于1/72us，所以使用72个nop函数为一个us，然后根据需要的定时时间进行计算。  
一个nop（）表示一个时钟周期，因为频率为72Mhz，所以一个nop（）=1/72mhz=1/72us；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDQ5NDIy_size_16_color_FFFFFF_t_70]  
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**IIC的驱动**  
![在这里插入图片描述][20201203161701338.png]  
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![在这里插入图片描述][20201203163220367.png]  
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![在这里插入图片描述][20201203163315398.png]  
![在这里插入图片描述][20201203163322909.png]  
![在这里插入图片描述][20201203171734948.png]

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![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDQ5NDIy_size_16_color_FFFFFF_t_70 5]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDQ5NDIy_size_16_color_FFFFFF_t_70 6]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDQ5NDIy_size_16_color_FFFFFF_t_70 7]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDQ5NDIy_size_16_color_FFFFFF_t_70 8]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDQ5NDIy_size_16_color_FFFFFF_t_70 9]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDQ5NDIy_size_16_color_FFFFFF_t_70 10]  
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**程序**  
**int main()**  
\{  
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\}  
![在这里插入图片描述][20201204115009338.png]  
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![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDQ5NDIy_size_16_color_FFFFFF_t_70 14]  
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设置时间  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDQ5NDIy_size_16_color_FFFFFF_t_70 16]  
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