SX Specific Analog to Digital Conversion

Methods:

• A Virtual Peripheral ADC: Using Bitstream A-to-D Conversion (thanks to Randy Glenn for recovering it!)
  
• 8bitadc.src A Virtual Peripheral software 8-bit Sigma-Delta ADC. v1.02 09/07/00 NOTE: This version of the ADC overwrites all the other pins on the port used. If you shall implement more than one ADC in the same SX, you should use the same port all of them. This is because the code is optimized for this this usage.
  
• IBM PC EPP Parallel port ADC08831 interface from Alberto Geraci of BTX Systemas

Integrations:

• SX based O’Scope from Alberto Geraci of BTX Systemas
  
• SX52 based audo recorder / player with MMC FLASH memory
  
• lcd.src Comparitive resistance meter with LCD Driver This software uses two software A/D converters, on pins RB.5 and RB.6, to read in a known resistance value, and compare it to an unknown, and then outputs the results on an 8-segment LCD. The RA pins drive the commons, and the RC pins drive the characters
  
• 8vp.src: Two 8-bit A/D converters, 19.2kbaud UART, two PWM outputs, one I2C serial link for EEPROMs, two 16-bit independent timers, Time clock (keeps count in msec), a software execution path switcher and push button detection and debounce. SX Demo Enhanced 2.0 by Craig Webb of Parallax Inc.
  
• SXDEMO: Two 8-bit A/D converters, 19.2kbaud UART, two PWM outputs, one I2C serial link for EEPROMs, two 16-bit independent timer, and all implemented as Virtual Peripherals, in software. This is compatible with the SX Demo Board from Parallax, and is the same code is shipped with the Parallax tools.
  
• POWERVP: Two 8 bit A/D converters, 19.2k baud 6 port UART along with four PWM outputs, and four 16 bit timers. This is not compatible with the SX Demo Board from Parallax, but is a very impressive demonstration of the type of power that software can provide on the right kind of silicon.

Also:

• Sigma Delta A2D
• Averaging A2D results
• General Analog to Digital Conversion

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