diff options
Diffstat (limited to 'Projects/AVRISP/AVRISP.txt')
| -rw-r--r-- | Projects/AVRISP/AVRISP.txt | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/Projects/AVRISP/AVRISP.txt b/Projects/AVRISP/AVRISP.txt index e26cfb11e..8d299e25a 100644 --- a/Projects/AVRISP/AVRISP.txt +++ b/Projects/AVRISP/AVRISP.txt @@ -60,9 +60,12 @@ *
* Note that this design currently has several limitations:
* - Minimum target clock speed of 500KHz due to hardware SPI used
- * - No VTARGET detection and notification
* - No reversed/shorted target connector detection and notification
*
+ * On AVR models with an ADC converter, ACC should be tied to 5V (e.g. VBUS) and the VTARGET_ADC_CHANNEL token should be
+ * set to an appropriate ADC channel number in the project makefile for VTARGET detection to operate correctly. On models
+ * without an ADC converter, VTARGET will report at a fixed 5V level.
+ *
* \section SSec_Options Project Options
*
* The following defines can be found in this demo, which can control the demo behaviour when defined, or changed in value.
@@ -88,5 +91,10 @@ * <td>Makefile CDEFS</td>
* <td>Mask for the programmer's target RESET line on the chosen port.</td>
* </tr>
+ * <tr>
+ * <td>VTARGET_ADC_CHANNEL</td>
+ * <td>Makefile CDEFS</td>
+ * <td>ADC channel number (on supported AVRs) to use for VTARGET level detection.</td>
+ * </tr>
* </table>
*/
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