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???
05/15/04 01:26
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 		 #70383 - RE: 51 with large SBUF?
Responding to: ???'s previous message
Dan B said:
Long packets of 50 bytes or greater are lost when the 51 is busy dealing with device A.

Wow, interrupts disabled for ~26ms! So here are some suggestions:
  • Yes, external UART. Some have 64-byte FIFOs.

  • Use another physically small 8051 or PIC to implement the UART receive buffer and interface your primary 8051 to that device using faster IIC (I2C), SPI, nibble-wide parallel, or byte-wide parallel so you can quickly pick up the buffer when you get a chance.

  • Design your UART datalink protocol to tolerate the loss of big data segments (i.e., detect when it happens and retry).



List of 9 messages in thread
TopicAuthorDate
51 with large SBUF?            01/01/70 00:00      
   51 without large SBUF!            01/01/70 00:00      
      RE: 51 without large SBUF!            01/01/70 00:00      
         RE: 51 without large SBUF!            01/01/70 00:00      
   RE: 51 with large SBUF?            01/01/70 00:00      
      RE: 51 with large SBUF?            01/01/70 00:00      
         RE: 51 with large SBUF?            01/01/70 00:00      
            RE: 51 with large SBUF?            01/01/70 00:00      
               RE: 51 with large SBUF?            01/01/70 00:00      

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