Raised the guard bits in the AVRISP-MKII clone project when in PDI and TPI to 32, to prevent communication errors on low quality connections to a target.

LUFA/DoxygenPages/ChangeLog.txt

@@ -17,7 +17,7 @@
   *  - Core:
   *   - Android Accessory Host property strings changed from a struct of pointer to an array to prevent unaligned access on greater than 8-bit architectures
   *  - Library Applications:
-  *   - None
+  *   - Raised the guard bits in the AVRISP-MKII clone project when in PDI and TPI to 32, to prevent communication errors on low quality connections to a target
   *
   *  <b>Fixed:</b>
   *  - Core:

Projects/AVRISP-MKII/Lib/XPROG/TINYNVM.c

@@ -128,9 +128,9 @@ bool TINYNVM_EnableTPI(void)
 	/* Enable TPI programming mode with the attached target */
 	XPROGTarget_EnableTargetTPI();
 
-	/* Lower direction change guard time to 0 USART bits */
+	/* Lower direction change guard time to 32 USART bits */
 	XPROGTarget_SendByte(TPI_CMD_SSTCS | TPI_CTRL_REG);
-	XPROGTarget_SendByte(0x07);
+	XPROGTarget_SendByte(0x02);
 
 	/* Enable access to the XPROG NVM bus by sending the documented NVM access key to the device */
 	XPROGTarget_SendByte(TPI_CMD_SKEY);

Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c

@@ -131,9 +131,9 @@ bool XMEGANVM_EnablePDI(void)
 	XPROGTarget_SendByte(PDI_CMD_STCS | PDI_RESET_REG);
 	XPROGTarget_SendByte(PDI_RESET_KEY);
 
-	/* Lower direction change guard time to 0 USART bits */
+	/* Lower direction change guard time to 32 USART bits */
 	XPROGTarget_SendByte(PDI_CMD_STCS | PDI_CTRL_REG);
-	XPROGTarget_SendByte(0x07);
+	XPROGTarget_SendByte(0x02);
 
 	/* Enable access to the XPROG NVM bus by sending the documented NVM access key to the device */
 	XPROGTarget_SendByte(PDI_CMD_KEY);