2.4 GHz無線鼠標(biāo)鍵盤接收器的設(shè)計

針對RF無線鼠標(biāo)傳輸速度慢、傳輸距離有限的缺點，提出了一種2.4 GHz無線鼠標(biāo)鍵盤接收器的設(shè)計方案。采用USB多媒體鍵盤編碼器HT82K95E和射頻收發(fā)器nRF24L01進(jìn)行設(shè)計，以HT82K95E為核心，完成HID設(shè)備的枚舉過程。控制器利用普通I/O口模擬SPI總線，完成了與無線收發(fā)模塊的數(shù)據(jù)交換。采用nRF24L01無線通信協(xié)議中的Enhanced ShockBurst收發(fā)模式，數(shù)據(jù)低速輸入，但高速發(fā)射，從而實現(xiàn)了鼠標(biāo)鍵盤復(fù)合設(shè)備與主機間的無線通信功能。試驗結(jié)果表明，由于采用了2.4 GHz無線技術(shù)，該無線鼠標(biāo)鍵盤接收器能夠有效傳輸距離可達(dá)10 m，大大降低功耗，增強了抗干擾性能。

Abstract:

 Due to the disadvantage of RF wireless mouse?蒺s low-speed transmission and limited transmission distance, this paper proposed a new design of a 2.4GHz wireless mouse and keyboard receiver，The system which adopted USB multi media keyboard encoder HT82K95E and RF transceiver nRF24L01 took HT82K95E as the core to complete the enumeration process of the HID equipment. By taking advantage of ordinary I/O port to simulate SPI bus, the controller exchanged data with the wireless transceiver module. It used the enhanced shockBurstTM transceiver mode of the NRF24L01 wireless communication protocol which allowed low-speed data input, but high-speed launched, and realized the wireless communication function between the mouse and keyboard composite equipment with the host. Due to the using of 2.4GHz wireless technology, the results show that the receiver can reach 10-meter effective transmission distance, greatly reduce the power and enhance the anti-interference performance.