2009全国大学生电子竞赛：模拟路灯控制系统(I题)-2009 National Undergraduate Electronic Contest: Analog street light control system (I question)

系统上电后，显示提示符P.,按K1进入抢答界面，如果主持人没按K1开始键，选手按动 则视为违规抢答，数码管显示违规选手号，蜂鸣器报警，违规指示灯亮，当主持人按下K1,蜂鸣器鸣一声，开始抢答。最先按下的选手，会显示在数码管上，并开始倒计时， 如果选手在20秒内回答完问题，并按下K2,蜂鸣器开始报警，结束指示灯 如果选手未能在20秒内按下K2,蜂鸣器开始报警，超时指示灯亮 K7为复位键，按下后，再次进入抢答界面-System power-up, the display prompt P., K1 e

Used on TI' s DSP chip comes TMS320F28335 SPI functions to achieve SD card reader, SD card reader on the basis of the program and transplant support FAT32 file system fatfs, maximum support 32G SD capacity, with high reference value, there is no ques