You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
275 lines
9.5 KiB
C
275 lines
9.5 KiB
C
8 years ago
|
/*
|
||
|
|
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
|
||
|
|
|