Added new XCK_RESCUE_CLOCK_ENABLE compile time option to the AVRISP-MKII clone progra...

diff --git a/LUFA/ManPages/ChangeLog.txt b/LUFA/ManPages/ChangeLog.txt
index 1eda701..0afdd4a 100644 (file)
--- a/LUFA/ManPages/ChangeLog.txt
+++ b/LUFA/ManPages/ChangeLog.txt
@@ -35,6 +35,7 @@
   *  - Added new Pipe_GetBusyBanks(), Endpoint_GetBusyBanks() and Endpoint_AbortPendingIN() functions
   *  - Added new NO_BLOCK_SUPPORT, NO_EEPROM_BYTE_SUPPORT, NO_FLASH_BYTE_SUPPORT and NO_LOCK_BYTE_WRITE_SUPPORT compile time options to the
   *    CDC class bootloader
+  *  - Added new XCK_RESCUE_CLOCK_ENABLE compile time option to the AVRISP-MKII clone programmer project (thanks to Tom Light)
   *
   *  <b>Changed:</b>
   *  - Removed complicated logic for the Endpoint_ConfigureEndpoint() function to use inlined or function called versions

diff --git a/Projects/AVRISP-MKII/AVRISP-MKII.txt b/Projects/AVRISP-MKII/AVRISP-MKII.txt
index d569e7e..7489cf6 100644 (file)
--- a/Projects/AVRISP-MKII/AVRISP-MKII.txt
+++ b/Projects/AVRISP-MKII/AVRISP-MKII.txt
@@ -280,6 +280,12 @@
  *    <td>Define to switch to a non-standard endpoint scheme, breaking compatibility with AVRStudio under Windows but making
  *        the code compatible with software such as avrdude (all platforms) that use the libUSB driver.
  *   </tr>
+ *   <tr>
+ *    <td>XCK_RESCUE_CLOCK_ENABLE</td>
+ *    <td>Makefile LUFA_OPTS</td>
+ *    <td>Define to move the ISP rescue clock to the AVR's XCK pin instead of the OCR1A output pin. This is useful for existing programming
+ *        hardware that does not expose the OCR1A pin of the AVR, but *may* cause some issues with PDI programming mode.
+ *   </tr>
  *  </table>
  */
 

diff --git a/Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c b/Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c
index 66a1c25..657c2c9 100644 (file)
--- a/Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c
+++ b/Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c
@@ -189,19 +189,29 @@ void ISPTarget_DisableTargetISP(void)
  */
 void ISPTarget_ConfigureRescueClock(void)
 {
-       /* Configure OCR1A as an output for the specified AVR model */
-       #if defined(USB_SERIES_2_AVR)
-       DDRC |= (1 << 6);
+       #if defined(XCK_RESCUE_CLOCK_ENABLE)
+               /* Configure XCK as an output for the specified AVR model */
+               DDRD  |= (1 << 5);
+               
+               /* Start USART to generate a 4MHz clock on the XCK pin */
+               UBRR1  = ((F_CPU / 2 / ISP_RESCUE_CLOCK_SPEED) - 1);
+               UCSR1B = (1 << TXEN1);
+               UCSR1C = (1 << UMSEL10) | (1 << UPM11) | (1 << USBS1) | (1 << UCSZ11) | (1 << UCSZ10) | (1 << UCPOL1);
        #else
-       DDRB |= (1 << 5);
+               /* Configure OCR1A as an output for the specified AVR model */
+               #if defined(USB_SERIES_2_AVR)
+               DDRC |= (1 << 6);
+               #else
+               DDRB |= (1 << 5);
+               #endif
+
+               /* Start Timer 1 to generate a 4MHz clock on the OCR1A pin */
+               TIMSK1 = 0;
+               TCNT1  = 0;
+               OCR1A  = ((F_CPU / 2 / ISP_RESCUE_CLOCK_SPEED) - 1);
+               TCCR1A = (1 << COM1A0);
+               TCCR1B = ((1 << WGM12) | (1 << CS10));
        #endif
-
-       /* Start Timer 1 to generate a 4MHz clock on the OCR1A pin */
-       TIMSK1 = 0;
-       TCNT1  = 0;
-       OCR1A  = ((F_CPU / 2 / ISP_RESCUE_CLOCK_SPEED) - 1);
-       TCCR1A = (1 << COM1A0);
-       TCCR1B = ((1 << WGM12) | (1 << CS10));
 }
 
 /** Configures the AVR's timer ready to produce software ISP for the slower ISP speeds that

diff --git a/Projects/AVRISP-MKII/Lib/XPROG/XPROGProtocol.c b/Projects/AVRISP-MKII/Lib/XPROG/XPROGProtocol.c
index 02fbbf4..276f63e 100644 (file)
--- a/Projects/AVRISP-MKII/Lib/XPROG/XPROGProtocol.c
+++ b/Projects/AVRISP-MKII/Lib/XPROG/XPROGProtocol.c
@@ -196,6 +196,10 @@ static void XPROGProtocol_LeaveXPROGMode(void)
                XPROGTarget_DisableTargetTPI();
        }
 
+       #if defined(XCK_RESCUE_CLOCK_ENABLE) && defined(ENABLE_ISP_PROTOCOL)
+       ISPTarget_ConfigureRescueClock();
+       #endif
+
        Endpoint_Write_Byte(CMD_XPROG);
        Endpoint_Write_Byte(XPRG_CMD_LEAVE_PROGMODE);
        Endpoint_Write_Byte(XPRG_ERR_OK);

diff --git a/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c b/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c
index 8760e62..f6fff1c 100644 (file)
--- a/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c
+++ b/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c
@@ -118,7 +118,7 @@ void XPROGTarget_DisableTargetTPI(void)
        /* Set all USART lines as input, tristate */
        DDRD  &= ~((1 << 5) | (1 << 3));
        PORTD &= ~((1 << 5) | (1 << 3) | (1 << 2));
-
+       
        /* Tristate target /RESET line */
        AUX_LINE_DDR  &= ~AUX_LINE_MASK;
        AUX_LINE_PORT &= ~AUX_LINE_MASK;

diff --git a/Projects/AVRISP-MKII/makefile b/Projects/AVRISP-MKII/makefile
index 6c6e117..5135722 100644 (file)
--- a/Projects/AVRISP-MKII/makefile
+++ b/Projects/AVRISP-MKII/makefile
@@ -137,6 +137,7 @@ LUFA_OPTS += -D VTARGET_REF_VOLTS=5
 LUFA_OPTS += -D VTARGET_SCALE_FACTOR=1
 #LUFA_OPTS += -D NO_VTARGET_DETECT
 #LUFA_OPTS += -D LIBUSB_DRIVER_COMPAT
+#LUFA_OPTS += -D XCK_RESCUE_CLOCK_ENABLE
 
 
 # Create the LUFA source path variables by including the LUFA root makefile