Projects/AVRISP/AVRISP.txt

   1 /** \file
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   6
   7 /** \mainpage AVRISP MKII Programmer Project
   8  *
   9  *  \section SSec_Compat Demo Compatibility:
  10  *
  11  *  The following list indicates what microcontrollers are compatible with this demo.
  12  *
  13  *  - Series 7 USB AVRs
  14  *  - Series 6 USB AVRs
  15  *  - Series 4 USB AVRs
  16  *  - Series 2 USB AVRs
  17  *
  18  *  \section SSec_Info USB Information:
  19  *
  20  *  The following table gives a rundown of the USB utilization of this demo.
  21  *
  22  * <table>
  23  *  <tr>
  24  *   <td><b>USB Mode:</b></td>
  25  *   <td>Device</td>
  26  *  </tr>
  27  *  <tr>
  28  *   <td><b>USB Class:</b></td>
  29  *   <td>Vendor Specific Class</td>
  30  *  </tr>
  31  *  <tr>
  32  *   <td><b>USB Subclass:</b></td>
  33  *   <td>N/A</td>
  34  *  </tr>
  35  *  <tr>
  36  *   <td><b>Relevant Standards:</b></td>
  37  *   <td>Atmel AVRISP MKII Protocol Specification</td>
  38  *  </tr>
  39  *  <tr>
  40  *   <td><b>Usable Speeds:</b></td>
  41  *   <td>Full Speed Mode</td>
  42  *  </tr>
  43  * </table>
  44  *
  45  *  \section SSec_Description Project Description:
  46  *
  47  *  Firmware for an AVRStudio compatible AVRISP-MKII clone programmer. This project will enable the USB AVR series of
  48  *  microcontrollers to act as a clone of the official Atmel AVRISP-MKII programmer, usable within AVRStudio. In its
  49  *  most basic form, it allows for the programming of 5V AVRs from within AVRStudio with no special hardware other than
  50  *  the USB AVR and the parts needed for the USB interface. If the user desires, more advanced circuits incorporating
  51  *  level conversion can be made to allow for the programming of 3.3V AVR designs.
  52  *
  53  *  This device spoofs Atmel's official AVRISP-MKII device PID so that it remains compatible with Atmel's AVRISP-MKII
  54  *  drivers. When promted, direct your OS to install Atmel's AVRISP-MKII drivers provided with AVRStudio.
  55  *
  56  *  Note that this design currently has several limitations:
  57  *    - Minimum target clock speed of 500KHz due to hardware SPI used
  58  *    - No reversed/shorted target connector detection and notification
  59  *
  60  *  On AVR models with an ADC converter, ACC should be tied to 5V (e.g. VBUS) and the VTARGET_ADC_CHANNEL token should be
  61  *  set to an appropriate ADC channel number in the project makefile for VTARGET detection to operate correctly. On models
  62  *  without an ADC converter, VTARGET will report at a fixed 5V level.
  63  *
  64  *  Connections to the device are simple:
  65  *
  66  *  <table>
  67  *   <tr>
  68  *    <td><b>Programmer Pin:</b></td>
  69  *    <td><b>Target Device Pin:</b></td>
  70  *    <td><b>ISP 6 Pin Layout:</b></td>
  71  *   </tr>
  72  *   <tr>
  73  *    <td>MISO</td>
  74  *    <td>PDO</td>
  75  *    <td>1</td>
  76  *   </tr>
  77  *   <tr>
  78  *    <td>ADCx <b><sup>1</sup></b></td>
  79  *    <td>VTARGET</td>
  80  *    <td>2</td>
  81  *   </tr>
  82  *   <tr>
  83  *    <td>SCLK</td>
  84  *    <td>SCLK</td>
  85  *    <td>3</td>
  86  *   </tr>
  87  *   <tr>
  88  *    <td>MOSI</td>
  89  *    <td>PDI</td>
  90  *    <td>4</td>
  91  *   </tr>
  92  *   <tr>
  93  *    <td>PORTx.y <b><sup>2</sup></b></td>
  94  *    <td>/RESET</td>
  95  *    <td>5</td>
  96  *   </tr>
  97  *   <tr>
  98  *    <td>GND</td>
  99  *    <td>GND</td>
 100  *    <td>6</td>
 101  *   </tr>
 102  *  </table>
 103  *
 104  *  <b><sup>1</sup></b> <i>Optional, see \ref SSec_Options section - for USB AVRs with ADC modules only</i> \n
 105  *  <b><sup>2</sup></b> <i>See \ref SSec_Options section</i>
 106  *
 107  *  \section SSec_Options Project Options
 108  *
 109  *  The following defines can be found in this demo, which can control the demo behaviour when defined, or changed in value.
 110  *
 111  *  <table>
 112  *   <tr>
 113  *    <td><b>Define Name:</b></td>
 114  *    <td><b>Location:</b></td>
 115  *    <td><b>Description:</b></td>
 116  *   </tr>
 117  *   <tr>
 118  *    <td>RESET_LINE_PORT</td>
 119  *    <td>Makefile CDEFS</td>
 120  *    <td>PORT register for the programmer's target RESET line.</td>
 121  *   </tr>
 122  *   <tr>
 123  *    <td>RESET_LINE_DDR</td>
 124  *    <td>Makefile CDEFS</td>
 125  *    <td>DDR register for the programmer's target RESET line.</td>
 126  *   </tr>
 127  *   <tr>
 128  *    <td>RESET_LINE_MASK</td>
 129  *    <td>Makefile CDEFS</td>
 130  *    <td>Mask for the programmer's target RESET line on the chosen port. <b>Must not be the AVR's /SS pin</b>, as the
 131  *        target pins are tri-stated when not in use, and low signals on the /SS pin will force SPI slave mode when the
 132  *        pin is configured as an input.</td>
 133  *   </tr>
 134  *   <tr>
 135  *    <td>VTARGET_ADC_CHANNEL</td>
 136  *    <td>Makefile CDEFS</td>
 137  *    <td>ADC channel number (on supported AVRs) to use for VTARGET level detection.</td>
 138  *   </tr>
 139  *  </table>
 140  */