X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/7f9f97c792dee6875fbca9806422bdd7d6c5a657..d26a9ed5fd6fc60a0dfa61d04f5ae2bd7163a85d:/Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c

diff --git a/Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c b/Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c
index c23b9d75b..defd7ffe0 100644
--- a/Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c
+++ b/Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c
@@ -38,24 +38,11 @@
 
 #if defined(ENABLE_XPROG_PROTOCOL) || defined(__DOXYGEN__)
 
-/** Sends the given NVM register address to the target.
- *
- *  \param[in] Register  NVM register whose absolute address is to be sent
- */
-void XMEGANVM_SendNVMRegAddress(const uint8_t Register)
-{
-	/* Determine the absolute register address from the NVM base memory address and the NVM register address */
-	uint32_t Address = XPROG_Param_NVMBase | Register;
-
-	/* Send the calculated 32-bit address to the target, LSB first */
-	XMEGANVM_SendAddress(Address);
-}
-
 /** Sends the given 32-bit absolute address to the target.
  *
  *  \param[in] AbsoluteAddress  Absolute address to send to the target
  */
-void XMEGANVM_SendAddress(const uint32_t AbsoluteAddress)
+static void XMEGANVM_SendAddress(const uint32_t AbsoluteAddress)
 {
 	/* Send the given 32-bit address to the target, LSB first */
 	XPROGTarget_SendByte(((uint8_t*)&AbsoluteAddress)[0]);
@@ -64,6 +51,19 @@ void XMEGANVM_SendAddress(const uint32_t AbsoluteAddress)
 	XPROGTarget_SendByte(((uint8_t*)&AbsoluteAddress)[3]);
 }
 
+/** Sends the given NVM register address to the target.
+ *
+ *  \param[in] Register  NVM register whose absolute address is to be sent
+ */
+static void XMEGANVM_SendNVMRegAddress(const uint8_t Register)
+{
+	/* Determine the absolute register address from the NVM base memory address and the NVM register address */
+	uint32_t Address = XPROG_Param_NVMBase | Register;
+
+	/* Send the calculated 32-bit address to the target, LSB first */
+	XMEGANVM_SendAddress(Address);
+}
+
 /** Busy-waits while the NVM controller is busy performing a NVM operation, such as a FLASH page read or CRC
  *  calculation.
  *
@@ -136,24 +136,18 @@ bool XMEGANVM_GetMemoryCRC(const uint8_t CRCCommand, uint32_t* const CRCDest)
 	if (!(XMEGANVM_WaitWhileNVMControllerBusy()))
 	  return false;
 	
-	uint32_t MemoryCRC = 0;
-	
-	/* Read the first generated CRC byte value */
-	XPROGTarget_SendByte(PDI_CMD_LDS | (PDI_DATSIZE_4BYTES << 2));
+	/* Load the PDI pointer register with the DAT0 register start address */
+	XPROGTarget_SendByte(PDI_CMD_ST | (PDI_POINTER_DIRECT << 2) | PDI_DATSIZE_4BYTES);
 	XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_DAT0);
-	MemoryCRC  = XPROGTarget_ReceiveByte();
 
-	/* Read the second generated CRC byte value */
-	XPROGTarget_SendByte(PDI_CMD_LDS | (PDI_DATSIZE_4BYTES << 2));
-	XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_DAT1);
-	MemoryCRC |= ((uint16_t)XPROGTarget_ReceiveByte() << 8);
-
-	/* Read the third generated CRC byte value */
-	XPROGTarget_SendByte(PDI_CMD_LDS | (PDI_DATSIZE_4BYTES << 2));
-	XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_DAT2);
-	MemoryCRC |= ((uint32_t)XPROGTarget_ReceiveByte() << 16);
+	/* Send the REPEAT command to grab the CRC bytes */
+	XPROGTarget_SendByte(PDI_CMD_REPEAT | PDI_DATSIZE_1BYTE);
+	XPROGTarget_SendByte(XMEGA_CRC_LENGTH - 1);
 	
-	*CRCDest = MemoryCRC;
+	/* Read in the CRC bytes from the target */
+	XPROGTarget_SendByte(PDI_CMD_LD | (PDI_POINTER_INDIRECT_PI << 2) | PDI_DATSIZE_1BYTE);
+	for (uint8_t i = 0; i < XMEGA_CRC_LENGTH; i++)
+	  ((uint8_t*)CRCDest)[i] = XPROGTarget_ReceiveByte();
 	
 	return true;
 }