74HC165

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  • 74HC595 74HC165程序例子(AVR)

    硬件說(shuō)明：ATmega48/88/168的PB5是SPI時(shí)鐘輸出，接74HC595/74HC165的移位時(shí)鐘輸入端；PB4是SPI的MISO數(shù)據(jù)輸人，接74HC165的數(shù)據(jù)輸出；PB3是SPI的MOSI數(shù)據(jù)輸出，接74HC595的串行數(shù)據(jù)輸入端SER；PB2接74HC595/74HC165的

  • AVR單片機(jī)I/O口讀74HC165接口程序

    AVR單片機(jī)I/O口讀74HC165接口程序*******************************/#include#define SER_IN PD3#define SER_CK PB2#define SER_SL PB3uint16_t SerIn(void){uint16_t ret=0,i;//數(shù)據(jù)鎖存,在shift/load輸入一脈沖PIO

  • SPI的電路設(shè)計(jì)

    PIC16F877A將其SCK(串行時(shí)鐘)和SDO(串行數(shù)據(jù)輸出)分別與74HC165的CP和Ds引腳相連，送出時(shí)鐘信號(hào)和串行數(shù)據(jù)。74HC165將接收到的串行數(shù)據(jù)轉(zhuǎn)換成并行數(shù)據(jù)，通過(guò)并行數(shù)據(jù)輸出口D0～D7連接到共陰極數(shù)碼管，從而實(shí)現(xiàn)在SPI方