Squashed 'lib/lufa/' content from commit 385d40300

git-subtree-dir: lib/lufa
git-subtree-split: 385d4030035dbaf41591309dbde47653bd03841b

1 files changed, 274 insertions, 0 deletions

diff --git a/Projects/AVRISP-MKII/Lib/XPROG/TINYNVM.c b/Projects/AVRISP-MKII/Lib/XPROG/TINYNVM.c
new file mode 100644
index 0000000000..22eb7d74cb
--- /dev/null
+++ b/Projects/AVRISP-MKII/Lib/XPROG/TINYNVM.c
@@ -0,0 +1,274 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2017.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2017  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+  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
+  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
+  software without specific, written prior permission.
+
+  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
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+/** \file
+ *
+ *  Target-related functions for the TINY target's NVM module.
+ */
+
+#define  INCLUDE_FROM_TINYNVM_C
+#include "TINYNVM.h"
+
+#if defined(ENABLE_XPROG_PROTOCOL) || defined(__DOXYGEN__)
+
+/** Sends the given pointer address to the target's TPI pointer register */
+static void TINYNVM_SendPointerAddress(const uint16_t AbsoluteAddress)
+{
+	/* Send the given 16-bit address to the target, LSB first */
+	XPROGTarget_SendByte(TPI_CMD_SSTPR | 0);
+	XPROGTarget_SendByte(AbsoluteAddress & 0xFF);
+	XPROGTarget_SendByte(TPI_CMD_SSTPR | 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.
+ *
+ *  \param[in] Address  6-bit I/O address to write to in the target's I/O memory space
+ */
+static void TINYNVM_SendReadNVMRegister(const uint8_t Address)
+{
+	/* The TPI command for reading from the I/O space uses strange addressing, where the I/O address's upper
+	 * two bits of the 6-bit address are shifted left once - use function to reduce code size */
+	XPROGTarget_SendByte(TPI_CMD_SIN(Address));
+}
+
+/** Sends a SOUT command to the target with the specified I/O address, ready for the data byte to be read.
+ *
+ *  \param[in] Address  6-bit I/O address to read from in the target's I/O memory space
+ */
+static void TINYNVM_SendWriteNVMRegister(const uint8_t Address)
+{
+	/* The TPI command for reading from the I/O space uses strange addressing, where the I/O address's upper
+	 * two bits of the 6-bit address are shifted left once - use function to reduce code size */
+	XPROGTarget_SendByte(TPI_CMD_SOUT(Address));
+}
+
+/** Busy-waits while the NVM controller is busy performing a NVM operation, such as a FLASH page read.
+ *
+ *  \return Boolean \c true if the NVM controller became ready within the timeout period, \c false otherwise
+ */
+bool TINYNVM_WaitWhileNVMBusBusy(void)
+{
+	/* Poll the STATUS register to check to see if NVM access has been enabled */
+	for (;;)
+	{
+		/* Send the SLDCS command to read the TPI STATUS register to see the NVM bus is active */
+		XPROGTarget_SendByte(TPI_CMD_SLDCS(TPI_REG_STATUS));
+
+		uint8_t StatusRegister = XPROGTarget_ReceiveByte();
+
+		/* We might have timed out waiting for the status register read response, check here */
+		if (!(TimeoutTicksRemaining))
+		  return false;
+
+		/* Check the status register read response to see if the NVM bus is enabled */
+		if (StatusRegister & TPI_STATUS_NVM)
+		  return true;
+	}
+}
+
+/** Waits while the target's NVM controller is busy performing an operation, exiting if the
+ *  timeout period expires.
+ *
+ *  \return Boolean \c true if the NVM controller became ready within the timeout period, \c false otherwise
+ */
+bool TINYNVM_WaitWhileNVMControllerBusy(void)
+{
+	/* Poll the STATUS register to check to see if NVM access has been enabled */
+	for (;;)
+	{
+		/* Send the SIN command to read the TPI STATUS register to see the NVM bus is busy */
+		TINYNVM_SendReadNVMRegister(XPROG_Param_NVMCSRRegAddr);
+
+		uint8_t StatusRegister = XPROGTarget_ReceiveByte();
+
+		/* We might have timed out waiting for the status register read response, check here */
+		if (!(TimeoutTicksRemaining))
+		  return false;
+
+		/* Check to see if the BUSY flag is still set */
+		if (!(StatusRegister & (1 << 7)))
+		  return true;
+	}
+}
+
+/** Enables the physical TPI interface on the target and enables access to the internal NVM controller.
+ *
+ *  \return Boolean \c true if the TPI interface was enabled successfully, \c 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_REG_CTRL));
+	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_REG_STATUS));
+		XPROGTarget_SendByte(0x00);
+
+		/* Read back the STATUS register, check to see if it took effect */
+		XPROGTarget_SendByte(TPI_CMD_SLDCS(TPI_REG_STATUS));
+	} 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
+ *  \param[out] ReadBuffer   Buffer to store read data into
+ *  \param[in]  ReadSize     Length of the data to read from the device
+ *
+ *  \return Boolean \c true if the command sequence complete successfully
+ */
+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()))
+	  return false;
+
+	/* 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-- && TimeoutTicksRemaining)
+	{
+		/* Read the byte of data from the target */
+		XPROGTarget_SendByte(TPI_CMD_SLD(TPI_POINTER_INDIRECT_PI));
+		*(ReadBuffer++) = XPROGTarget_ReceiveByte();
+	}
+
+	return (TimeoutTicksRemaining > 0);
+}
+
+/** Writes word addressed memory to the target's memory spaces.
+ *
+ *  \param[in] WriteAddress  Start address to write to within the target's address space
+ *  \param[in] WriteBuffer   Buffer to source data from
+ *  \param[in] WriteLength   Total number of bytes to write to the device (must be an integer multiple of 2)
+ *
+ *  \return Boolean \c true if the command sequence complete successfully
+ */
+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 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 */
+		if (!(TINYNVM_WaitWhileNVMControllerBusy()))
+		  return false;
+
+		/* 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 wrote a whole two-byte word */
+		WriteLength -= 2;
+	}
+
+	return true;
+}
+
+/** Erases the target's memory space.
+ *
+ *  \param[in] EraseCommand  NVM erase command to send to the device
+ *  \param[in] Address       Address inside the memory space to erase
+ *
+ *  \return Boolean \c true if the command sequence complete successfully
+ */
+bool TINYNVM_EraseMemory(const uint8_t EraseCommand,
+                         const uint16_t Address)
+{
+	/* Wait until the NVM controller is no longer busy */
+	if (!(TINYNVM_WaitWhileNVMControllerBusy()))
+	  return false;
+
+	/* Set the NVM control register to the target memory erase command */
+	TINYNVM_SendWriteNVMRegister(XPROG_Param_NVMCMDRegAddr);
+	XPROGTarget_SendByte(EraseCommand);
+
+	/* Write to a high byte location within the target address space to start the erase process */
+	TINYNVM_SendPointerAddress(Address | 0x0001);
+	XPROGTarget_SendByte(TPI_CMD_SST(TPI_POINTER_INDIRECT));
+	XPROGTarget_SendByte(0x00);
+
+	/* Wait until the NVM controller is no longer busy */
+	if (!(TINYNVM_WaitWhileNVMControllerBusy()))
+	  return false;
+
+	return true;
+}
+
+#endif
+