STM32U575 应用

起个摘要，后期维护

1、DMA原理：参考：【STM32】DMA原理，配置步骤超详细，一文搞懂DMA_dma配置_~Old的博客-优快云博客

2、STM32U575的DMA资源：

（datasheet摘要）

3、UART的使用

 1）printf的重定向

 2）中断接收不定长（使用空闲中断接口）

4、I2S的使用

audio部分参考：使用STM32的I2S协议读取麦克风INMP441_匿名代码客的博客-优快云博客

确定协议，以及接收处理（DMA一半完成时，先copy一部分）

5、timer

设置TIM2作为事件管理的定时器。APB1 = 160M，频率公式如下：

f = timer_clock / (Prescaler+1) / (Counter_Period+1)

想要得到100us触发一次，f = 1 / 100us = 10 kHz

timer_clock = 160M，Prescaler 凑为39， Counter_Period 设置为399，则：

f = 160 000 000 / (39+1) / (399+1) = 10 000 Hz

6、应用：

在STM32U575 datasheet： 60.4.16 SAI DMA interface

Follow the sequence below to configure the SAI interface in DMA mode:
1. Configure SAI and FIFO threshold levels to specify when the DMA request is launched.
2. Configure SAI DMA channel.
3. Enable the DMA.
4. Enable the SAI interface.
Note: Before configuring the SAI block, the SAI DMA channel must be disabled

7、Flash操作

STM32U575有1MBytes内存，分成两个BANK，前64页（1页8K）为BANK_1，后64页为BANK_2，做片上升级时要注意后64K使用BANK_2擦除

8、I2C slave配置

参考文档如下：

https://github.com/CherryXiuHuaWoo/STM32F030C8-IIC-Slave/blob/master/IIC/Src/i2c.c
https://blog.youkuaiyun.com/XiuHua_Wu/article/details/80992994?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522169468295716800226517240%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=169468295716800226517240&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduend~default-1-80992994-null-null.142^v94^chatsearchT3_1&utm_term=stm32cubemx%20i2c%20slave&spm=1018.2226.3001.4187
https://blog.youkuaiyun.com/XiuHua_Wu/article/details/80628874
https://blog.youkuaiyun.com/qq_36561846/article/details/117474070?ops_request_misc=&request_id=&biz_id=102&utm_term=stm32cubemx%20i2c%20slave&utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduweb~default-3-117474070.142^v94^chatsearchT3_1&spm=1018.2226.3001.4187
https://blog.youkuaiyun.com/NeoZng/article/details/128496694?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522169468495716800186514475%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=169468495716800186514475&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduend~default-1-128496694-null-null.142^v94^chatsearchT3_1&utm_term=HAL_I2C_Slave_seq_Receive_IT&spm=1018.2226.3001.4187
 

9、其他

例如SRAM空间的使用等