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Added new VTARGET_USE_INTERNAL_REF configuration option to the AVRISP-MKII clone project (thanks to Volker Bosch).

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This commit is contained in:
Dean Camera 2011-07-26 03:07:32 +00:00
parent d5e874d348
commit 025742fca8
6 changed files with 20 additions and 3 deletions
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6
Projects/AVRISP-MKII/AVRISP-MKII.txt
View file

@ -267,6 +267,12 @@
* to the ADC. <i>Ignored when compiled for targets lacking an ADC, or when NO_VTARGET_DETECT is defined.</i></td>
* </tr>
* <tr>
* <td>VTARGET_USE_INTERNAL_REF</td>
* <td>Makefile LUFA_OPTS</td>
* <td>Selects the internal 2.56V ADC reference voltage, instead of using the AVR's VREF pin. When enabled, this option will
* override the VTARGET_REF_VOLTS configuration option.</i></td>
* </tr>
* <tr>
* <td>VTARGET_SCALE_FACTOR</td>
* <td>Makefile LUFA_OPTS</td>
* <td>Indicates the target's supply voltage scale factor when applied to the ADC. A simple resistive divider can be used on the

2
Projects/AVRISP-MKII/Lib/V2Protocol.c
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@ -57,7 +57,7 @@ void V2Protocol_Init(void)
/* Initialize the ADC converter for VTARGET level detection on supported AVR models */
ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_128);
ADC_SetupChannel(VTARGET_ADC_CHANNEL);
ADC_StartReading(ADC_REFERENCE_AVCC | ADC_RIGHT_ADJUSTED | VTARGET_ADC_CHANNEL_MASK);
ADC_StartReading(VTARGET_REF_MASK | ADC_RIGHT_ADJUSTED | VTARGET_ADC_CHANNEL_MASK);
#endif
V2Params_LoadNonVolatileParamValues();

9
Projects/AVRISP-MKII/Lib/V2Protocol.h
View file

@ -61,6 +61,15 @@
#if defined(USB_SERIES_4_AVR) && ((VTARGET_ADC_CHANNEL == 2) || (VTARGET_ADC_CHANNEL == 3))
#error The U4 AVR chips do not contain ADC channels 2 or 3. Please change VTARGET_ADC_CHANNEL or define NO_VTARGET_DETECT in the makefile.
#endif
#if defined(VTARGET_USE_INTERNAL_REF)
#undef VTARGET_REF_VOLTS
#define VTARGET_REF_VOLTS 2.56
#define VTARGET_REF_MASK ADC_REFERENCE_INT2560MV
#else
#define VTARGET_REF_MASK ADC_REFERENCE_AVCC
#endif
/* Macros: */
/** Programmer ID string, returned to the host during the CMD_SIGN_ON command processing. */

1
Projects/AVRISP-MKII/makefile
View file

@ -140,6 +140,7 @@ LUFA_OPTS += -D ENABLE_XPROG_PROTOCOL
LUFA_OPTS += -D VTARGET_ADC_CHANNEL=2
LUFA_OPTS += -D VTARGET_REF_VOLTS=5
LUFA_OPTS += -D VTARGET_SCALE_FACTOR=1
#LUFA_OPTS += -D VTARGET_USE_INTERNAL_REF
#LUFA_OPTS += -D NO_VTARGET_DETECT
#LUFA_OPTS += -D LIBUSB_DRIVER_COMPAT
#LUFA_OPTS += -D XCK_RESCUE_CLOCK_ENABLE