本周更新一期视频教程：
视频教程第9期：STM32H7的GPIO专题，通过驱动源码，参考手册，数据手册应用笔记系统学习GPIO知识点
视频版：
https://www.bilibili.com/video/BV1Ui4y1k7dx
1、FatFS作者ChaN老师新作
一如既往的漆包线风，手艺依旧很棒，这次设计的电源板，做成了双面板，并且做了铺铜设计，先铺绝缘层再铺铜皮。正面的器件需要接地就戳破绝缘层焊接到铜皮。
正反面设计：
原理图：
2、用于M0和M3的浮点库Qfplib
这个库非常不错，对于不带硬件浮点的M0和M3系列芯片来说，值得一用，特别是做了浮点三角函数，做了高度优化。
https://www.quinapalus.com/qfplib.html
与MDK和IAR带的C库比较，速度优势超级明显。
3、通过相位补偿将8通道非同步ADC采集设计成同步采集
TIPD167 reference design | TI.com
这个是TI提供的一个参考设计案例，非常有参考价值，使用相位补偿算法补偿多路复用ADC引入的额外相位延迟，从而产生与同步采样ADC等效的效果。
4、乐鑫的ESP-IDF VS Code 插件的新增功能
https://www.espressif.com/zh-hans/news/ESP-IDF_VS_Code_Extension
有兴趣可以试试：
更新：
5、上百个非常棒的技术博客
这个是发布在hacker news的一篇帖子，很多网友进行了推荐留言，大家可以看看有没有自己喜欢的。
https://news.ycombinator.com/item?id=29237308#29237920
6、所有STM32系列DAC最高采样率比较
以STM32H7为例，实际测试过12MHz触发DAC+DMA也可以正常工作，但是随着程序的复杂会影响其它外设正常运行，这点在使用中要注意。
an4566-extending-the-dac-performance-of-stm32-microcontrollers-stmicroelectronics.pdf
7、SEGGER发布AppWizard的表盘控件Gauge视频教程
视频地址：https://v.qq.com/x/page/l33265px8va.html
8、万用表，LCR表最新进展
上次更新进展是2021-08-23，那个时候电压表、电流表和LCR表基本功能已调试完成，但是在温飘、精度、噪声、功耗方面进一步优化。
这次更新已经是第5版硬件设计了：
（1）外壳改为铝合金外壳
（2）2张板子，取消屏板
最早版本时的效果：
9、H7-TOOL本周进展
1、提升 H7-TOOL示波器硬件指标, 设计250M采样率转接板
已经投板了，等回来了，开始设计软件支持。采用树莓派单片机RP2040直接驱方案，使用可编程IO可以做到250MHz的翻转速度。
【结构】
（1）大小和BNC头转接板差不多大，分2个板子，上下安装亚克力保护板
（2）上面的板子是引脚排针和BNC插座
（3）下面的板子是示波器核心部分
【主要指标】
（1）单通道250Msps，双通道125Msps
（2）模拟带宽 > 50M
（3）电压量程: ±40V ±10V ±2.5V ±1V ±250mV ±65mV ±16mV
（4）硬件触发 CH1或CH2触发源
【硬件方案】
（1）树莓派单片机 RP2040
（2）ADC选AD9288或MXT2088
（3）和TOOL通信方式串口或SPI待定
2、H7-TOOL的10个GPIO输入输出简易控制
TOOL有10个GPIO，D0到D9可供做普通GPIO使用。
设置方法：
3、H7-TOOL高速DAPLINK调试带看门狗的程序会出现打断点后，无法正常暂停，解决办法比较简单，在Option选项冻结看门狗即可
程序使用了看门狗不像低功耗，低功耗会直接调试不正常，而看门狗的话，如果在程序里面打了断点，会出现程序还在正常运行的假象。
现象就是打断点的地方会一闪而过，闪烁过的时间由喂狗溢出时间决定。
解决办法比较简单：
芯片专门设计的功能，就是为了方便用户在低功耗和看门狗模式下载可以继续使用调试。以STM32H7为例，可以在MDK option选项的此处进行设置：
也可以直接调用API设置：
/** @brief Freeze/Unfreeze Peripherals in Debug mode
*/
#define __HAL_DBGMCU_FREEZE_WWDG1() (DBGMCU->APB3FZ1 |= (DBGMCU_APB3FZ1_DBG_WWDG1))
#define __HAL_DBGMCU_FREEZE_TIM2() (DBGMCU->APB1LFZ1 |= (DBGMCU_APB1LFZ1_DBG_TIM2))
#define __HAL_DBGMCU_FREEZE_TIM3() (DBGMCU->APB1LFZ1 |= (DBGMCU_APB1LFZ1_DBG_TIM3))
#define __HAL_DBGMCU_FREEZE_TIM4() (DBGMCU->APB1LFZ1 |= (DBGMCU_APB1LFZ1_DBG_TIM4))
#define __HAL_DBGMCU_FREEZE_TIM5() (DBGMCU->APB1LFZ1 |= (DBGMCU_APB1LFZ1_DBG_TIM5))
#define __HAL_DBGMCU_FREEZE_TIM6() (DBGMCU->APB1LFZ1 |= (DBGMCU_APB1LFZ1_DBG_TIM6))
#define __HAL_DBGMCU_FREEZE_TIM7() (DBGMCU->APB1LFZ1 |= (DBGMCU_APB1LFZ1_DBG_TIM7))
#define __HAL_DBGMCU_FREEZE_TIM12() (DBGMCU->APB1LFZ1 |= (DBGMCU_APB1LFZ1_DBG_TIM12))
#define __HAL_DBGMCU_FREEZE_TIM13() (DBGMCU->APB1LFZ1 |= (DBGMCU_APB1LFZ1_DBG_TIM13))
#define __HAL_DBGMCU_FREEZE_TIM14() (DBGMCU->APB1LFZ1 |= (DBGMCU_APB1LFZ1_DBG_TIM14))
#define __HAL_DBGMCU_FREEZE_LPTIM1() (DBGMCU->APB1LFZ1 |= (DBGMCU_APB1LFZ1_DBG_LPTIM1))
#define __HAL_DBGMCU_FREEZE_I2C1() (DBGMCU->APB1LFZ1 |= (DBGMCU_APB1LFZ1_DBG_I2C1))
#define __HAL_DBGMCU_FREEZE_I2C2() (DBGMCU->APB1LFZ1 |= (DBGMCU_APB1LFZ1_DBG_I2C2))
#define __HAL_DBGMCU_FREEZE_I2C3() (DBGMCU->APB1LFZ1 |= (DBGMCU_APB1LFZ1_DBG_I2C3))
#define __HAL_DBGMCU_FREEZE_FDCAN() (DBGMCU->APB1HFZ1 |= (DBGMCU_APB1HFZ1_DBG_FDCAN))
#define __HAL_DBGMCU_FREEZE_TIM1() (DBGMCU->APB2FZ1 |= (DBGMCU_APB2FZ1_DBG_TIM1))
#define __HAL_DBGMCU_FREEZE_TIM8() (DBGMCU->APB2FZ1 |= (DBGMCU_APB2FZ1_DBG_TIM8))
#define __HAL_DBGMCU_FREEZE_TIM15() (DBGMCU->APB2FZ1 |= (DBGMCU_APB2FZ1_DBG_TIM15))
#define __HAL_DBGMCU_FREEZE_TIM16() (DBGMCU->APB2FZ1 |= (DBGMCU_APB2FZ1_DBG_TIM16))
#define __HAL_DBGMCU_FREEZE_TIM17() (DBGMCU->APB2FZ1 |= (DBGMCU_APB2FZ1_DBG_TIM17))
#define __HAL_DBGMCU_FREEZE_HRTIM() (DBGMCU->APB2FZ1 |= (DBGMCU_APB2FZ1_DBG_HRTIM))
#define __HAL_DBGMCU_FREEZE_I2C4() (DBGMCU->APB4FZ1 |= (DBGMCU_APB4FZ1_DBG_I2C4))
#define __HAL_DBGMCU_FREEZE_LPTIM2() (DBGMCU->APB4FZ1 |= (DBGMCU_APB4FZ1_DBG_LPTIM2))
#define __HAL_DBGMCU_FREEZE_LPTIM3() (DBGMCU->APB4FZ1 |= (DBGMCU_APB4FZ1_DBG_LPTIM3))
#define __HAL_DBGMCU_FREEZE_LPTIM4() (DBGMCU->APB4FZ1 |= (DBGMCU_APB4FZ1_DBG_LPTIM4))
#define __HAL_DBGMCU_FREEZE_LPTIM5() (DBGMCU->APB4FZ1 |= (DBGMCU_APB4FZ1_DBG_LPTIM5))
#define __HAL_DBGMCU_FREEZE_RTC() (DBGMCU->APB4FZ1 |= (DBGMCU_APB4FZ1_DBG_RTC))
#define __HAL_DBGMCU_FREEZE_IWDG1() (DBGMCU->APB4FZ1 |= (DBGMCU_APB4FZ1_DBG_IWDG1))
#define __HAL_DBGMCU_UnFreeze_WWDG1() (DBGMCU->APB3FZ1 &= ~ (DBGMCU_APB3FZ1_DBG_WWDG1))
#define __HAL_DBGMCU_UnFreeze_TIM2() (DBGMCU->APB1LFZ1 &= ~ (DBGMCU_APB1LFZ1_DBG_TIM2))
#define __HAL_DBGMCU_UnFreeze_TIM3() (DBGMCU->APB1LFZ1 &= ~ (DBGMCU_APB1LFZ1_DBG_TIM3))
#define __HAL_DBGMCU_UnFreeze_TIM4() (DBGMCU->APB1LFZ1 &= ~ (DBGMCU_APB1LFZ1_DBG_TIM4))
#define __HAL_DBGMCU_UnFreeze_TIM5() (DBGMCU->APB1LFZ1 &= ~ (DBGMCU_APB1LFZ1_DBG_TIM5))
#define __HAL_DBGMCU_UnFreeze_TIM6() (DBGMCU->APB1LFZ1 &= ~ (DBGMCU_APB1LFZ1_DBG_TIM6))
#define __HAL_DBGMCU_UnFreeze_TIM7() (DBGMCU->APB1LFZ1 &= ~ (DBGMCU_APB1LFZ1_DBG_TIM7))
#define __HAL_DBGMCU_UnFreeze_TIM12() (DBGMCU->APB1LFZ1 &= ~ (DBGMCU_APB1LFZ1_DBG_TIM12))
#define __HAL_DBGMCU_UnFreeze_TIM13() (DBGMCU->APB1LFZ1 &= ~ (DBGMCU_APB1LFZ1_DBG_TIM13))
#define __HAL_DBGMCU_UnFreeze_TIM14() (DBGMCU->APB1LFZ1 &= ~ (DBGMCU_APB1LFZ1_DBG_TIM14))
#define __HAL_DBGMCU_UnFreeze_LPTIM1() (DBGMCU->APB1LFZ1 &= ~ (DBGMCU_APB1LFZ1_DBG_LPTIM1))
#define __HAL_DBGMCU_UnFreeze_I2C1() (DBGMCU->APB1LFZ1 &= ~ (DBGMCU_APB1LFZ1_DBG_I2C1))
#define __HAL_DBGMCU_UnFreeze_I2C2() (DBGMCU->APB1LFZ1 &= ~ (DBGMCU_APB1LFZ1_DBG_I2C2))
#define __HAL_DBGMCU_UnFreeze_I2C3() (DBGMCU->APB1LFZ1 &= ~ (DBGMCU_APB1LFZ1_DBG_I2C3))
#define __HAL_DBGMCU_UnFreeze_FDCAN() (DBGMCU->APB1HFZ1 &= ~ (DBGMCU_APB1HFZ1_DBG_FDCAN))
#define __HAL_DBGMCU_UnFreeze_TIM1() (DBGMCU->APB2FZ1 &= ~ (DBGMCU_APB2FZ1_DBG_TIM1))
#define __HAL_DBGMCU_UnFreeze_TIM8() (DBGMCU->APB2FZ1 &= ~ (DBGMCU_APB2FZ1_DBG_TIM8))
#define __HAL_DBGMCU_UnFreeze_TIM15() (DBGMCU->APB2FZ1 &= ~ (DBGMCU_APB2FZ1_DBG_TIM15))
#define __HAL_DBGMCU_UnFreeze_TIM16() (DBGMCU->APB2FZ1 &= ~ (DBGMCU_APB2FZ1_DBG_TIM16))
#define __HAL_DBGMCU_UnFreeze_TIM17() (DBGMCU->APB2FZ1 &= ~ (DBGMCU_APB2FZ1_DBG_TIM17))
#define __HAL_DBGMCU_UnFreeze_HRTIM() (DBGMCU->APB2FZ1 &= ~ (DBGMCU_APB2FZ1_DBG_HRTIM))
#define __HAL_DBGMCU_UnFreeze_I2C4() (DBGMCU->APB4FZ1 &= ~ (DBGMCU_APB4FZ1_DBG_I2C4))
#define __HAL_DBGMCU_UnFreeze_LPTIM2() (DBGMCU->APB4FZ1 &= ~ (DBGMCU_APB4FZ1_DBG_LPTIM2))
#define __HAL_DBGMCU_UnFreeze_LPTIM3() (DBGMCU->APB4FZ1 &= ~ (DBGMCU_APB4FZ1_DBG_LPTIM3))
#define __HAL_DBGMCU_UnFreeze_LPTIM4() (DBGMCU->APB4FZ1 &= ~ (DBGMCU_APB4FZ1_DBG_LPTIM4))
#define __HAL_DBGMCU_UnFreeze_LPTIM5() (DBGMCU->APB4FZ1 &= ~ (DBGMCU_APB4FZ1_DBG_LPTIM5))
#define __HAL_DBGMCU_UnFreeze_RTC() (DBGMCU->APB4FZ1 &= ~ (DBGMCU_APB4FZ1_DBG_RTC))
#define __HAL_DBGMCU_UnFreeze_IWDG1() (DBGMCU->APB4FZ1 &= ~ (DBGMCU_APB4FZ1_DBG_IWDG1))
#if defined(DUAL_CORE)
#define __HAL_DBGMCU_FREEZE2_IWDG2() (DBGMCU->APB4FZ2 |= (DBGMCU_APB4FZ2_DBG_IWDG2))
#define __HAL_DBGMCU_FREEZE2_WWDG2() (DBGMCU->APB1LFZ2 |= (DBGMCU_APB1LFZ2_DBG_WWDG2))
#define __HAL_DBGMCU_UnFreeze2_IWDG2() (DBGMCU->APB4FZ2 &= ~ (DBGMCU_APB4FZ2_DBG_IWDG2))
#define __HAL_DBGMCU_UnFreeze2_WWDG2() (DBGMCU->APB1LFZ2 &= ~ (DBGMCU_APB1LFZ2_DBG_WWDG2))
#define __HAL_DBGMCU_FREEZE2_WWDG1() (DBGMCU->APB3FZ2 |= (DBGMCU_APB3FZ2_DBG_WWDG1))
#define __HAL_DBGMCU_FREEZE2_TIM2() (DBGMCU->APB1LFZ2 |= (DBGMCU_APB1LFZ2_DBG_TIM2))
#define __HAL_DBGMCU_FREEZE2_TIM3() (DBGMCU->APB1LFZ2 |= (DBGMCU_APB1LFZ2_DBG_TIM3))
#define __HAL_DBGMCU_FREEZE2_TIM4() (DBGMCU->APB1LFZ2 |= (DBGMCU_APB1LFZ2_DBG_TIM4))
#define __HAL_DBGMCU_FREEZE2_TIM5() (DBGMCU->APB1LFZ2 |= (DBGMCU_APB1LFZ2_DBG_TIM5))
#define __HAL_DBGMCU_FREEZE2_TIM6() (DBGMCU->APB1LFZ2 |= (DBGMCU_APB1LFZ2_DBG_TIM6))
#define __HAL_DBGMCU_FREEZE2_TIM7() (DBGMCU->APB1LFZ2 |= (DBGMCU_APB1LFZ2_DBG_TIM7))
#define __HAL_DBGMCU_FREEZE2_TIM12() (DBGMCU->APB1LFZ2 |= (DBGMCU_APB1LFZ2_DBG_TIM12))
#define __HAL_DBGMCU_FREEZE2_TIM13() (DBGMCU->APB1LFZ2 |= (DBGMCU_APB1LFZ2_DBG_TIM13))
#define __HAL_DBGMCU_FREEZE2_TIM14() (DBGMCU->APB1LFZ2 |= (DBGMCU_APB1LFZ2_DBG_TIM14))
#define __HAL_DBGMCU_FREEZE2_LPTIM1() (DBGMCU->APB1LFZ2 |= (DBGMCU_APB1LFZ2_DBG_LPTIM1))
#define __HAL_DBGMCU_FREEZE2_I2C1() (DBGMCU->APB1LFZ2 |= (DBGMCU_APB1LFZ2_DBG_I2C1))
#define __HAL_DBGMCU_FREEZE2_I2C2() (DBGMCU->APB1LFZ2 |= (DBGMCU_APB1LFZ2_DBG_I2C2))
#define __HAL_DBGMCU_FREEZE2_I2C3() (DBGMCU->APB1LFZ2 |= (DBGMCU_APB1LFZ2_DBG_I2C3))
#define __HAL_DBGMCU_FREEZE2_FDCAN() (DBGMCU->APB1HFZ2 |= (DBGMCU_APB1HFZ2_DBG_FDCAN))
#define __HAL_DBGMCU_FREEZE2_TIM1() (DBGMCU->APB2FZ2 |= (DBGMCU_APB2FZ2_DBG_TIM1))
#define __HAL_DBGMCU_FREEZE2_TIM8() (DBGMCU->APB2FZ2 |= (DBGMCU_APB2FZ2_DBG_TIM8))
#define __HAL_DBGMCU_FREEZE2_TIM15() (DBGMCU->APB2FZ2 |= (DBGMCU_APB2FZ2_DBG_TIM15))
#define __HAL_DBGMCU_FREEZE2_TIM16() (DBGMCU->APB2FZ2 |= (DBGMCU_APB2FZ2_DBG_TIM16))
#define __HAL_DBGMCU_FREEZE2_TIM17() (DBGMCU->APB2FZ2 |= (DBGMCU_APB2FZ2_DBG_TIM17))
#define __HAL_DBGMCU_FREEZE2_HRTIM() (DBGMCU->APB2FZ2 |= (DBGMCU_APB2FZ2_DBG_HRTIM))
#define __HAL_DBGMCU_FREEZE2_I2C4() (DBGMCU->APB4FZ2 |= (DBGMCU_APB4FZ2_DBG_I2C4))
#define __HAL_DBGMCU_FREEZE2_LPTIM2() (DBGMCU->APB4FZ2 |= (DBGMCU_APB4FZ2_DBG_LPTIM2))
#define __HAL_DBGMCU_FREEZE2_LPTIM3() (DBGMCU->APB4FZ2 |= (DBGMCU_APB4FZ2_DBG_LPTIM3))
#define __HAL_DBGMCU_FREEZE2_LPTIM4() (DBGMCU->APB4FZ2 |= (DBGMCU_APB4FZ2_DBG_LPTIM4))
#define __HAL_DBGMCU_FREEZE2_LPTIM5() (DBGMCU->APB4FZ2 |= (DBGMCU_APB4FZ2_DBG_LPTIM5))
#define __HAL_DBGMCU_FREEZE2_RTC() (DBGMCU->APB4FZ2 |= (DBGMCU_APB4FZ2_DBG_RTC))
#define __HAL_DBGMCU_FREEZE2_IWDG1() (DBGMCU->APB4FZ2 |= (DBGMCU_APB4FZ2_DBG_IWDG1))
#define __HAL_DBGMCU_UnFreeze2_WWDG1() (DBGMCU->APB3FZ2 &= ~ (DBGMCU_APB3FZ2_DBG_WWDG1))
#define __HAL_DBGMCU_UnFreeze2_TIM2() (DBGMCU->APB1LFZ2 &= ~ (DBGMCU_APB1LFZ2_DBG_TIM2))
#define __HAL_DBGMCU_UnFreeze2_TIM3() (DBGMCU->APB1LFZ2 &= ~ (DBGMCU_APB1LFZ2_DBG_TIM3))
#define __HAL_DBGMCU_UnFreeze2_TIM4() (DBGMCU->APB1LFZ2 &= ~ (DBGMCU_APB1LFZ2_DBG_TIM4))
#define __HAL_DBGMCU_UnFreeze2_TIM5() (DBGMCU->APB1LFZ2 &= ~ (DBGMCU_APB1LFZ2_DBG_TIM5))
#define __HAL_DBGMCU_UnFreeze2_TIM6() (DBGMCU->APB1LFZ2 &= ~ (DBGMCU_APB1LFZ2_DBG_TIM6))
#define __HAL_DBGMCU_UnFreeze2_TIM7() (DBGMCU->APB1LFZ2 &= ~ (DBGMCU_APB1LFZ2_DBG_TIM7))
#define __HAL_DBGMCU_UnFreeze2_TIM12() (DBGMCU->APB1LFZ2 &= ~ (DBGMCU_APB1LFZ2_DBG_TIM12))
#define __HAL_DBGMCU_UnFreeze2_TIM13() (DBGMCU->APB1LFZ2 &= ~ (DBGMCU_APB1LFZ2_DBG_TIM13))
#define __HAL_DBGMCU_UnFreeze2_TIM14() (DBGMCU->APB1LFZ2 &= ~ (DBGMCU_APB1LFZ2_DBG_TIM14))
#define __HAL_DBGMCU_UnFreeze2_LPTIM1() (DBGMCU->APB1LFZ2 &= ~ (DBGMCU_APB1LFZ2_DBG_LPTIM1))
#define __HAL_DBGMCU_UnFreeze2_I2C1() (DBGMCU->APB1LFZ2 &= ~ (DBGMCU_APB1LFZ2_DBG_I2C1))
#define __HAL_DBGMCU_UnFreeze2_I2C2() (DBGMCU->APB1LFZ2 &= ~ (DBGMCU_APB1LFZ2_DBG_I2C2))
#define __HAL_DBGMCU_UnFreeze2_I2C3() (DBGMCU->APB1LFZ2 &= ~ (DBGMCU_APB1LFZ2_DBG_I2C3))
#define __HAL_DBGMCU_UnFreeze2_FDCAN() (DBGMCU->APB1HFZ2 &= ~ (DBGMCU_APB1HFZ2_DBG_FDCAN))
#define __HAL_DBGMCU_UnFreeze2_TIM1() (DBGMCU->APB2FZ2 &= ~ (DBGMCU_APB2FZ2_DBG_TIM1))
#define __HAL_DBGMCU_UnFreeze2_TIM8() (DBGMCU->APB2FZ2 &= ~ (DBGMCU_APB2FZ2_DBG_TIM8))
#define __HAL_DBGMCU_UnFreeze2_TIM15() (DBGMCU->APB2FZ2 &= ~ (DBGMCU_APB2FZ2_DBG_TIM15))
#define __HAL_DBGMCU_UnFreeze2_TIM16() (DBGMCU->APB2FZ2 &= ~ (DBGMCU_APB2FZ2_DBG_TIM16))
#define __HAL_DBGMCU_UnFreeze2_TIM17() (DBGMCU->APB2FZ2 &= ~ (DBGMCU_APB2FZ2_DBG_TIM17))
#define __HAL_DBGMCU_UnFreeze2_HRTIM() (DBGMCU->APB2FZ2 &= ~ (DBGMCU_APB2FZ2_DBG_HRTIM))
#define __HAL_DBGMCU_UnFreeze2_I2C4() (DBGMCU->APB4FZ2 &= ~ (DBGMCU_APB4FZ2_DBG_I2C4))
#define __HAL_DBGMCU_UnFreeze2_LPTIM2() (DBGMCU->APB4FZ2 &= ~ (DBGMCU_APB4FZ2_DBG_LPTIM2))
#define __HAL_DBGMCU_UnFreeze2_LPTIM3() (DBGMCU->APB4FZ2 &= ~ (DBGMCU_APB4FZ2_DBG_LPTIM3))
#define __HAL_DBGMCU_UnFreeze2_LPTIM4() (DBGMCU->APB4FZ2 &= ~ (DBGMCU_APB4FZ2_DBG_LPTIM4))
#define __HAL_DBGMCU_UnFreeze2_LPTIM5() (DBGMCU->APB4FZ2 &= ~ (DBGMCU_APB4FZ2_DBG_LPTIM5))
#define __HAL_DBGMCU_UnFreeze2_RTC() (DBGMCU->APB4FZ2 &= ~ (DBGMCU_APB4FZ2_DBG_RTC))
#define __HAL_DBGMCU_UnFreeze2_IWDG1() (DBGMCU->APB4FZ2 &= ~ (DBGMCU_APB4FZ2_DBG_IWDG1))
#endif
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