I used the IO of stc89c51 to generate a square wave with a high level of 5v, a low level of 0V, and a duty cycle of 1kHZ and 80%, and then connected the IO to a transistor (as shown in the figure) to
The existing BSP only supports one SD card. (Question 1: Generally speaking, the CPU should be able to support multiple SD cards physically, and it should have relevant registers to indicate the numbe
I am now going to write a program for the address bus of arm9 (YC2440) to achieve the function of transmitting data to another board. I wonder if anyone has done it before? Or is there any information
[i=s]This post was last edited by tdatd on 2019-1-8 08:23[/i] After setting up the environment and lighting up the LED, we will go straight to our goal - ethercat communication. We will start the test