if(KEY_Scan(0)==WKUP_PRES)IWDG_Feed();//如果WK_UP按下,则喂狗 delay_ms(10); }; mode=0,可以忽略灰色阴影的条件。 1s内KEY0按下,即KEY0==0,运行黄色的if函数,这时key_up=0,但看门狗仍旧重启。这个没疑问。 再接着,按下WKUP,但此时key_up==0了,就无法进入到黄色的if中,则永远不会return ...
WKUP_PRES;}else if(KEY0==1&&KEY1==1&&WK_UP==0)key_up=1;return 0;// 无按键按下 } ...
Accelerator™) allowing 0-wait-state execution from Flash memory, frequency up to 80 MHz, MPU, 100DMIPS and DSP instructions •Performance benchmark – 1.25 DMIPS/MHz (Drystone 2.1) – 273.55 CoreMark® (3.42 CoreMark/MHz @ 80 MHz) •Energy benchmark – 174.5 ULPBench® score ...
– Conversion range: 0 to 3.6 V – Separate analog supply: 2.4 V to 3.6 V •One 12-bit D/A converter (with 2 channels) •2 fast low-power analog comparators with programmable input and output •Up to 24 capacitive sensing channels for touchkey, linear and rotary touch sensors ...
1、GPIO简介 GPIO(general porpose intputoutput):通用输入输出端口的简称。可以通过软件控制其输出和输入。stm32芯片的GPIO引脚与外部设备连接起来,从而实现与外部通信,...