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read_spi

 
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Oliver Lai



Joined: 12 Dec 2003
Posts: 16

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read_spi
PostPosted: Fri Feb 06, 2004 9:07 pm     Reply with quote
Can anybody help me to find my code bug? I can not read any data by 3 wire SPI. Thanks!

Code:

unsigned long read_spi()
{
   byte i;
   unsigned long data16=0;
   
   write_spi(0x04);
   write_spi(0x28);
   delay_us(10);
   output_low(MAX1463_CS);
   delay_us(10);
   for(i=0; i<16;++i) {     
      if (input(MAX1463_DO)) bit_set(data16, i);
  //    shift_left(&data16, 1, input(MAX1463_DO));   //I tried this way too
      delay_us(5);
      output_high(MAX1463_CLK);
      delay_us(5);
      output_low(MAX1463_CLK);
      delay_us(5);
   }       
   delay_us(10);
   output_high(MAX1463_CS);
   return(data16);
}
Neutone



Joined: 08 Sep 2003
Posts: 839
Location: Houston

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PostPosted: Fri Feb 06, 2004 9:29 pm     Reply with quote
That chips loaded. I would get the dev kit.
The MAX1463EVKIT Setup and Functional Verification

You might want to lower the chip select before you try talking to it.
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