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???
07/04/09 20:58
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#166733 - Other Bit Banging
Responding to: ???'s previous message
Other indirect methods of bit-banging GPIOs can also be relatively slow.

- Bit banging GPIOs on the end of a USB device can be slowed by the driver and the nature of the USB protocol.

- Bit banging GPIOs on legacy parallel ports under Win-32 when using DLLs such as INPOUT32 or GIVEIO can be slowed by the amount of software layering going on.

With USB devices it can be best to embed the performance driven timing of I/O sequencing into a target MCU rather than leaving the bit by bit manipulation up to host application software.

mkaras


List of 14 messages in thread
TopicAuthorDate
ISP-flash programmer            01/01/70 00:00      
   Re: ISP-flash programmer            01/01/70 00:00      
      USB-DB25 converters are not reliable            01/01/70 00:00      
         RE: USB-Serial / Parallel converters            01/01/70 00:00      
      Not parallel port converters?            01/01/70 00:00      
         USB To "Parallel" Adapters            01/01/70 00:00      
            PCI latency?            01/01/70 00:00      
               PCI Latency....Least of Problem...            01/01/70 00:00      
                  PCI latency can be a significant problem            01/01/70 00:00      
                     PCI Speed            01/01/70 00:00      
                        Bit-banging can be extremely slow            01/01/70 00:00      
                           Other Bit Banging            01/01/70 00:00      
                              Slave processor a need for modern PC            01/01/70 00:00      
   ISP Flash Programmer with USB            01/01/70 00:00      

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