/*
LUFA Library
- Copyright (C) Dean Camera, 2010.
-
+ Copyright (C) Dean Camera, 2012.
+
dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
+ www.lufa-lib.org
*/
/*
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+ Copyright 2012 Dean Camera (dean [at] fourwalledcubicle [dot] com)
- Permission to use, copy, modify, distribute, and sell this
+ Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
- without fee, provided that the above copyright notice appear in
+ without fee, provided that the above copyright notice appear in
all copies and that both that the copyright notice and this
- permission notice and warranty disclaimer appear in supporting
- documentation, and that the name of the author not be used in
- advertising or publicity pertaining to distribution of the
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of the author not be used in
+ advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
- The author disclaim all warranties with regard to this
+ The author disclaims all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
{
/* Send the given 16-bit address to the target, LSB first */
XPROGTarget_SendByte(TPI_CMD_SSTPR | 0);
- XPROGTarget_SendByte(((uint8_t*)&AbsoluteAddress)[0]);
+ XPROGTarget_SendByte(AbsoluteAddress & 0xFF);
XPROGTarget_SendByte(TPI_CMD_SSTPR | 1);
- XPROGTarget_SendByte(((uint8_t*)&AbsoluteAddress)[1]);
+ XPROGTarget_SendByte(AbsoluteAddress >> 8);
}
/** Sends a SIN command to the target with the specified I/O address, ready for the data byte to be written.
uint8_t StatusRegister = XPROGTarget_ReceiveByte();
/* We might have timed out waiting for the status register read response, check here */
- if (!(TimeoutMSRemaining))
+ if (!(TimeoutTicksRemaining))
return false;
/* Check the status register read response to see if the NVM bus is enabled */
if (StatusRegister & TPI_STATUS_NVM)
- {
- TimeoutMSRemaining = COMMAND_TIMEOUT_MS;
- return true;
- }
+ return true;
}
}
uint8_t StatusRegister = XPROGTarget_ReceiveByte();
/* We might have timed out waiting for the status register read response, check here */
- if (!(TimeoutMSRemaining))
+ if (!(TimeoutTicksRemaining))
return false;
/* Check to see if the BUSY flag is still set */
if (!(StatusRegister & (1 << 7)))
- {
- TimeoutMSRemaining = COMMAND_TIMEOUT_MS;
- return true;
- }
+ return true;
}
}
+/** Enables the physical TPI interface on the target and enables access to the internal NVM controller.
+ *
+ * \return Boolean true if the TPI interface was enabled successfully, false otherwise
+ */
+bool TINYNVM_EnableTPI(void)
+{
+ /* Enable TPI programming mode with the attached target */
+ XPROGTarget_EnableTargetTPI();
+
+ /* Lower direction change guard time to 32 USART bits */
+ XPROGTarget_SendByte(TPI_CMD_SSTCS | TPI_CTRL_REG);
+ 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);
+ for (uint8_t i = sizeof(TPI_NVMENABLE_KEY); i > 0; i--)
+ XPROGTarget_SendByte(TPI_NVMENABLE_KEY[i - 1]);
+
+ /* Wait until the NVM bus becomes active */
+ return TINYNVM_WaitWhileNVMBusBusy();
+}
+
+/** Removes access to the target's NVM controller and physically disables the target's physical TPI interface. */
+void TINYNVM_DisableTPI(void)
+{
+ TINYNVM_WaitWhileNVMBusBusy();
+
+ do
+ {
+ /* Clear the NVMEN bit in the TPI STATUS register to disable TPI mode */
+ XPROGTarget_SendByte(TPI_CMD_SSTCS | TPI_STATUS_REG);
+ XPROGTarget_SendByte(0x00);
+
+ /* Read back the STATUS register, check to see if it took effect */
+ XPROGTarget_SendByte(TPI_CMD_SLDCS | PDI_RESET_REG);
+ } while (XPROGTarget_ReceiveByte() != 0x00);
+
+ XPROGTarget_DisableTargetTPI();
+}
+
/** Reads memory from the target's memory spaces.
*
* \param[in] ReadAddress Start address to read from within the target's address space
*
* \return Boolean true if the command sequence complete successfully
*/
-bool TINYNVM_ReadMemory(const uint16_t ReadAddress, uint8_t* ReadBuffer, uint16_t ReadSize)
+bool TINYNVM_ReadMemory(const uint16_t ReadAddress,
+ uint8_t* ReadBuffer,
+ uint16_t ReadSize)
{
/* Wait until the NVM controller is no longer busy */
if (!(TINYNVM_WaitWhileNVMControllerBusy()))
/* Set the NVM control register to the NO OP command for memory reading */
TINYNVM_SendWriteNVMRegister(XPROG_Param_NVMCMDRegAddr);
XPROGTarget_SendByte(TINY_NVM_CMD_NOOP);
-
+
/* Send the address of the location to read from */
TINYNVM_SendPointerAddress(ReadAddress);
-
- while (ReadSize-- && TimeoutMSRemaining)
+
+ while (ReadSize-- && TimeoutTicksRemaining)
{
/* Read the byte of data from the target */
XPROGTarget_SendByte(TPI_CMD_SLD | TPI_POINTER_INDIRECT_PI);
*(ReadBuffer++) = XPROGTarget_ReceiveByte();
}
-
- return (TimeoutMSRemaining != 0);
+
+ return (TimeoutTicksRemaining > 0);
}
/** Writes word addressed memory to the target's memory spaces.
*
* \return Boolean true if the command sequence complete successfully
*/
-bool TINYNVM_WriteMemory(const uint16_t WriteAddress, uint8_t* WriteBuffer, uint16_t WriteLength)
+bool TINYNVM_WriteMemory(const uint16_t WriteAddress,
+ uint8_t* WriteBuffer,
+ uint16_t WriteLength)
{
/* Wait until the NVM controller is no longer busy */
if (!(TINYNVM_WaitWhileNVMControllerBusy()))
return false;
-
+
/* Must have an integer number of words to write - if extra byte, word-align via a dummy high byte */
if (WriteLength & 0x01)
WriteBuffer[WriteLength++] = 0xFF;
- /* Set the NVM control register to the WORD WRITE command for memory reading */
+ /* Set the NVM control register to the WORD WRITE command for memory writing */
TINYNVM_SendWriteNVMRegister(XPROG_Param_NVMCMDRegAddr);
XPROGTarget_SendByte(TINY_NVM_CMD_WORDWRITE);
-
+
/* Send the address of the location to write to */
TINYNVM_SendPointerAddress(WriteAddress);
-
+
while (WriteLength)
{
/* Wait until the NVM controller is no longer busy */
/* Write the low byte of data to the target */
XPROGTarget_SendByte(TPI_CMD_SST | TPI_POINTER_INDIRECT_PI);
XPROGTarget_SendByte(*(WriteBuffer++));
-
+
/* Write the high byte of data to the target */
XPROGTarget_SendByte(TPI_CMD_SST | TPI_POINTER_INDIRECT_PI);
XPROGTarget_SendByte(*(WriteBuffer++));
- /* Need to decrement the write length twice, since we read out a whole word */
+ /* Need to decrement the write length twice, since we wrote a whole two-byte word */
WriteLength -= 2;
}
-
+
return true;
}
*
* \return Boolean true if the command sequence complete successfully
*/
-bool TINYNVM_EraseMemory(const uint8_t EraseCommand, const uint16_t Address)
+bool TINYNVM_EraseMemory(const uint8_t EraseCommand,
+ const uint16_t Address)
{
/* Wait until the NVM controller is no longer busy */
if (!(TINYNVM_WaitWhileNVMControllerBusy()))
/* Wait until the NVM controller is no longer busy */
if (!(TINYNVM_WaitWhileNVMControllerBusy()))
return false;
-
+
return true;
}
#endif
+
projects / pub / USBasp.git / blobdiff