By using enhanced reduced instruction set computing(RISC)architecture and carrying out powerful instructions in a single clock cycle,the ATmega128achieves the data transmission speed of about one MIPS per MHz.With thi...By using enhanced reduced instruction set computing(RISC)architecture and carrying out powerful instructions in a single clock cycle,the ATmega128achieves the data transmission speed of about one MIPS per MHz.With this advantage,the designer can eliminate the contradiction between power consumption and processing speed in data acquisition system based on U disk.In this paper,a U disk recorder for mass data storage is designed.It consists of a microcontroller ATmega128 and a U disk management chip CH376.ATmega128 with 4KB SRAM provides enough buffer memory and CH376 enables U disk files to be written or read in sector size.Based on analysis of the system,the hardware and software designs are given.With the designed data acquisition system,data transmission speed can reach 460KB per second.The experimental results show that the designed system has higher efficiency and reliability than the traditional ones when writing or reading U disk files.展开更多
为使DSP(Digital Signal Processing)应用系统具有海量数据存储、数据交换、数据更新、软件升级和USB(Universal Serial Bus)设备驱动等功能,设计并实现了一种以TI 5409 DSP处理器和CH375 USB主从接口芯片为核心的U盘读写系统。该系统支...为使DSP(Digital Signal Processing)应用系统具有海量数据存储、数据交换、数据更新、软件升级和USB(Universal Serial Bus)设备驱动等功能,设计并实现了一种以TI 5409 DSP处理器和CH375 USB主从接口芯片为核心的U盘读写系统。该系统支持U盘的热插拔,能自动识别并配置U盘,能稳定地对U盘进行存储器级读写和文件级读写。展开更多
SZF型波浪浮标系统通过无线电台将采集的波浪数据实时地传输到岸站数据接收处理机上,同时将波浪原始数据保存到浮标上的存储器内。为解决浮标大容量海浪原始数据的存储问题,利用USB总线技术设计了一款U盘存储板卡。该U盘存储板卡采用基...SZF型波浪浮标系统通过无线电台将采集的波浪数据实时地传输到岸站数据接收处理机上,同时将波浪原始数据保存到浮标上的存储器内。为解决浮标大容量海浪原始数据的存储问题,利用USB总线技术设计了一款U盘存储板卡。该U盘存储板卡采用基于Cortex-M3内核的ARM芯片,根据STM32F105 USB OTG接口特点,通过移植μC/OS-II实时操作系统技术进行任务调度,采用邮箱机制进行任务之间的通信,创新性地将通用U盘技术应用到基于单片机采集处理系统的海洋浮标上,实现了波浪浮标大容量、长时间的数据存储。实验测试结果表明,该U盘存储板卡具有存储速度快、准确性高、低功耗、高稳定性、便携性、通用性等特点,可用于多种需要数据存储的仪器设备中,其综合性能显著。展开更多
文摘By using enhanced reduced instruction set computing(RISC)architecture and carrying out powerful instructions in a single clock cycle,the ATmega128achieves the data transmission speed of about one MIPS per MHz.With this advantage,the designer can eliminate the contradiction between power consumption and processing speed in data acquisition system based on U disk.In this paper,a U disk recorder for mass data storage is designed.It consists of a microcontroller ATmega128 and a U disk management chip CH376.ATmega128 with 4KB SRAM provides enough buffer memory and CH376 enables U disk files to be written or read in sector size.Based on analysis of the system,the hardware and software designs are given.With the designed data acquisition system,data transmission speed can reach 460KB per second.The experimental results show that the designed system has higher efficiency and reliability than the traditional ones when writing or reading U disk files.
文摘为使DSP(Digital Signal Processing)应用系统具有海量数据存储、数据交换、数据更新、软件升级和USB(Universal Serial Bus)设备驱动等功能,设计并实现了一种以TI 5409 DSP处理器和CH375 USB主从接口芯片为核心的U盘读写系统。该系统支持U盘的热插拔,能自动识别并配置U盘,能稳定地对U盘进行存储器级读写和文件级读写。
文摘SZF型波浪浮标系统通过无线电台将采集的波浪数据实时地传输到岸站数据接收处理机上,同时将波浪原始数据保存到浮标上的存储器内。为解决浮标大容量海浪原始数据的存储问题,利用USB总线技术设计了一款U盘存储板卡。该U盘存储板卡采用基于Cortex-M3内核的ARM芯片,根据STM32F105 USB OTG接口特点,通过移植μC/OS-II实时操作系统技术进行任务调度,采用邮箱机制进行任务之间的通信,创新性地将通用U盘技术应用到基于单片机采集处理系统的海洋浮标上,实现了波浪浮标大容量、长时间的数据存储。实验测试结果表明,该U盘存储板卡具有存储速度快、准确性高、低功耗、高稳定性、便携性、通用性等特点,可用于多种需要数据存储的仪器设备中,其综合性能显著。
