实验器材:
探索者STM32F4开发板
实验目的:
学习STM32F4 DSP功能(FFT计算)的使用
硬件资源:
1,DS0(连接在PF9)
2,串口1(波特率:115200,PA9/PA10连接在板载USB转串口芯片CH340上面)
3,ALIENTEK 2.8/3.5/4.3/7寸TFTLCD模块(通过FSMC驱动,FSMC_NE4接LCD片选/A6接RS)
4,按键KEY0(PE4)
实验现象:
本实验测试STM32F4的DSP 库的FFT函数,程序运行后,自动生成1024点测试序列,然后,每当KEY0
按下后,调用DSP库的FFT算法(基4法)执行FFT运算,在LCD屏幕上面显示运算时间,同时将FFT结果
输出到串口,DS0用于提示程序正在运行。
注意事项:
1,4.3寸和7寸屏需要比较大电流,USB供电可能不足,请用外部电源适配器(推荐外接12V 1A电源).
2,本例程在LCD_Init函数里面(在ILI93xx.c),用到了printf,如果不初始化串口1,将导致液晶无法显示!!
正点原子@ALIENTEK
2014-10-25
广州市星翼电子科技有限公司
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- AdressD2021-06-18可以用,但是FFT库建议使用的是另一个函数。定时器采样有点不合适,应该是定时器PWM触发ad采样,不是进中断读一次。。。谢谢分享
- jmpxwh2021-01-14非HAL库的,定时器采样不合适一起秃头2021-05-22对于32来说,不用定时器控制采样频率,用什么?
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