It is said that a man is independent at 30 and free from doubts at 40, and this is the main period of 10 years, so I chose to start over!!!Since September 2009, I came to this strange city, Nanjing, w
[backcolor=white][size=4][color=#000000] Transmit and control AT commands to the module through the serial port. [/color][/size][/backcolor] [backcolor=white][size=4][color=#000000] 1. Serial port set
#includemsp430f5529.hunsigned int k=0;unsigned int LastCCR1; //The duration of the last high level is positively correlated with the distanceunsigned int dat[20]; //Back up the collected data through
[font=微软雅黑][size=3][color=#333333]【Ask if you don't understand】[/color] [color=#333333]As shown in the figure, the output of the power amplifier chip forms an analog audio signal (approximately a sine