行列式键盘的显示程序，四位8段LED显示-Remapping some DMA trigger sources from TIM16 and TIM17, USART1, and ADC different DMA channels

stm32f030c8 定时器17 的pwm输出，自己研究了很久的，开始一直配置不出来波形，经过一段时间的研究，终于好了，可以使用了，放上来给大家参考下，觉得有价值请点个赞。。。(Stm32f030c8 timer 17 PWM output, he studied for a long time, has been configured out of the waveform, after a period of study, finally, you can use, put up for