Thank you to whoever wrote Application Note AN012.

Comments

• jazzed Posts: 11,803

  2012-05-21 09:34 edited 2012-05-21 09:34

  Looks like Andre' wrote the code about a year ago. He even includes a cache
• average joe Posts: 795

  2012-05-21 09:52 edited 2012-05-21 09:52

  That is a great appnote! I've read it a few times trying to figure out how to do a couple different things. I will second the "Thank You!" now that someone mentioned it.
• Oldbitcollector (Jeff) Posts: 8,091

  2012-05-21 09:58 edited 2012-05-21 09:58

  Ah! Didn't think to check the code for the name.. Duh!
  
  Thank You Andre' LaMothe!
  
  You'll see this circuit in a couple of the new GG products. This Appnote made it painless!
  

   
   SPI_CS    
   SPI_SCK   
   SPI_MOSI  
   SPI_MISO                                       3.3V (VCC)
                                                         
                      Microchip 23K256 32K SRAM      ┣─────┐
                              ┌──────────┐           │    0.1uF (bypass)
          SPI_CS ──────── CSn│1        8│Vcc ───────┫     
                              │          │           │    GND 
          SPI_MISO ────── SO │2        7│HOLDn ─────┘
                              │          │
                           NC │3        6│SCK ─────── SPI_SCK
                              │          │                                
                      ┌─── Vss│4        5│SI ──────── SPI_MOSI
                      │       └──────────┘
                      │
                      
                     GND
  
  

  OBC
• jazzed Posts: 11,803

  2012-05-21 11:02 edited 2012-05-21 11:02

  Oldbitcollector (Jeff) wrote: »

  You'll see this circuit in a couple of the new GG products. This Appnote made it painless!

  
  Great! As a DIP I assume? Then people can use 1MB SPI Flash when they exhaust propeller memory instead of switching to another chip
• Oldbitcollector (Jeff) Posts: 8,091

  2012-05-21 11:23 edited 2012-05-21 11:23

  Yes, It didn't cost really anything to add this option to a couple products..
  

  jazzed wrote: »

  Great! As a DIP I assume? Then people can use 1MB SPI Flash when they exhaust propeller memory instead of switching to another chip

  
  Quickplayer "Extreme" has it connected as follows..
  

    SPI_CS                 = 19 ' SPI chip select (active low)
    SPI_SCK                = 16 ' SPI clock from master to all slaves
    SPI_MOSI               = 17 ' SPI master out serial in to slave
    SPI_MISO               = 18 ' SPI master in serial out from slave
  

  
  Can I use this with your C compiler?
  
  OBC
• jazzed Posts: 11,803

  2012-05-21 12:05 edited 2012-05-21 12:05

  Oldbitcollector (Jeff) wrote: »

  ...
  Can I use this with your C compiler?
  
  OBC

  
  
  Yes, Propeller-GCC programs can use it. All you need is a config file to set the pins - the driver is already written.
  It will be faster than running from eeprom or sd card.