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

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \file
  32  *
  33  *  Target-related functions for the XMEGA target's NVM module.
  34  */
  35
  36 #define  INCLUDE_FROM_XMEGA_NVM_C
  37 #include "XMEGANVM.h"
  38
  39 #if defined(ENABLE_XPROG_PROTOCOL) || defined(__DOXYGEN__)
  40
  41 /** Sends the given 32-bit absolute address to the target.
  42  *
  43  *  \param[in] AbsoluteAddress  Absolute address to send to the target
  44  */
  45 static void XMEGANVM_SendAddress(const uint32_t AbsoluteAddress)
  46 {
  47         /* Send the given 32-bit address to the target, LSB first */
  48         XPROGTarget_SendByte(((uint8_t*)&AbsoluteAddress)[0]);
  49         XPROGTarget_SendByte(((uint8_t*)&AbsoluteAddress)[1]);
  50         XPROGTarget_SendByte(((uint8_t*)&AbsoluteAddress)[2]);
  51         XPROGTarget_SendByte(((uint8_t*)&AbsoluteAddress)[3]);
  52 }
  53
  54 /** Sends the given NVM register address to the target.
  55  *
  56  *  \param[in] Register  NVM register whose absolute address is to be sent
  57  */
  58 static void XMEGANVM_SendNVMRegAddress(const uint8_t Register)
  59 {
  60         /* Determine the absolute register address from the NVM base memory address and the NVM register address */
  61         uint32_t Address = XPROG_Param_NVMBase | Register;
  62
  63         /* Send the calculated 32-bit address to the target, LSB first */
  64         XMEGANVM_SendAddress(Address);
  65 }
  66
  67 /** Busy-waits while the NVM controller is busy performing a NVM operation, such as a FLASH page read or CRC
  68  *  calculation.
  69  *
  70  *  \return Boolean true if the NVM controller became ready within the timeout period, false otherwise
  71  */
  72 bool XMEGANVM_WaitWhileNVMBusBusy(void)
  73 {
  74         /* Poll the STATUS register to check to see if NVM access has been enabled */
  75         uint8_t TimeoutMSRemaining = 100;
  76         while (TimeoutMSRemaining)
  77         {
  78                 /* Send the LDCS command to read the PDI STATUS register to see the NVM bus is active */
  79                 XPROGTarget_SendByte(PDI_CMD_LDCS | PDI_STATUS_REG);
  80                 if (XPROGTarget_ReceiveByte() & PDI_STATUS_NVM)
  81                   return true;
  82
  83                 /* Manage software timeout */
  84                 if (TIFR0 & (1 << OCF0A))
  85                 {
  86                         TIFR0 |= (1 << OCF0A);
  87                         TimeoutMSRemaining--;
  88                 }
  89         }
  90
  91         return false;
  92 }
  93
  94 /** Waits while the target's NVM controller is busy performing an operation, exiting if the
  95  *  timeout period expires.
  96  *
  97  *  \return Boolean true if the NVM controller became ready within the timeout period, false otherwise
  98  */
  99 bool XMEGANVM_WaitWhileNVMControllerBusy(void)
 100 {
 101         /* Poll the NVM STATUS register while the NVM controller is busy */
 102         uint8_t TimeoutMSRemaining = 100;
 103         while (TimeoutMSRemaining)
 104         {
 105                 /* Send a LDS command to read the NVM STATUS register to check the BUSY flag */
 106                 XPROGTarget_SendByte(PDI_CMD_LDS | (PDI_DATSIZE_4BYTES << 2));
 107                 XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_STATUS);
 108
 109                 /* Check to see if the BUSY flag is still set */
 110                 if (!(XPROGTarget_ReceiveByte() & (1 << 7)))
 111                   return true;
 112
 113                 /* Manage software timeout */
 114                 if (TIFR0 & (1 << OCF0A))
 115                 {
 116                         TIFR0 |= (1 << OCF0A);
 117                         TimeoutMSRemaining--;
 118                 }
 119         }
 120
 121         return false;
 122 }
 123
 124 /** Retrieves the CRC value of the given memory space.
 125  *
 126  *  \param[in]  CRCCommand  NVM CRC command to issue to the target
 127  *  \param[out] CRCDest     CRC Destination when read from the target
 128  *
 129  *  \return Boolean true if the command sequence complete successfully
 130  */
 131 bool XMEGANVM_GetMemoryCRC(const uint8_t CRCCommand, uint32_t* const CRCDest)
 132 {
 133         /* Wait until the NVM controller is no longer busy */
 134         if (!(XMEGANVM_WaitWhileNVMControllerBusy()))
 135           return false;
 136
 137         /* Set the NVM command to the correct CRC read command */
 138         XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
 139         XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_CMD);
 140         XPROGTarget_SendByte(CRCCommand);
 141
 142         /* Set CMDEX bit in NVM CTRLA register to start the CRC generation */
 143         XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
 144         XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_CTRLA);
 145         XPROGTarget_SendByte(1 << 0);
 146
 147         /* Wait until the NVM bus is ready again */
 148         if (!(XMEGANVM_WaitWhileNVMBusBusy()))
 149           return false;
 150
 151         /* Wait until the NVM controller is no longer busy */
 152         if (!(XMEGANVM_WaitWhileNVMControllerBusy()))
 153           return false;
 154
 155         /* Load the PDI pointer register with the DAT0 register start address */
 156         XPROGTarget_SendByte(PDI_CMD_ST | (PDI_POINTER_DIRECT << 2) | PDI_DATSIZE_4BYTES);
 157         XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_DAT0);
 158
 159         /* Send the REPEAT command to grab the CRC bytes */
 160         XPROGTarget_SendByte(PDI_CMD_REPEAT | PDI_DATSIZE_1BYTE);
 161         XPROGTarget_SendByte(XMEGA_CRC_LENGTH - 1);
 162
 163         /* Read in the CRC bytes from the target */
 164         XPROGTarget_SendByte(PDI_CMD_LD | (PDI_POINTER_INDIRECT_PI << 2) | PDI_DATSIZE_1BYTE);
 165         for (uint8_t i = 0; i < XMEGA_CRC_LENGTH; i++)
 166           ((uint8_t*)CRCDest)[i] = XPROGTarget_ReceiveByte();
 167
 168         return true;
 169 }
 170
 171 /** Reads memory from the target's memory spaces.
 172  *
 173  *  \param[in]  ReadAddress  Start address to read from within the target's address space
 174  *  \param[out] ReadBuffer   Buffer to store read data into
 175  *  \param[in]  ReadSize     Number of bytes to read
 176  *
 177  *  \return Boolean true if the command sequence complete successfully
 178  */
 179 bool XMEGANVM_ReadMemory(const uint32_t ReadAddress, uint8_t* ReadBuffer, uint16_t ReadSize)
 180 {
 181         /* Wait until the NVM controller is no longer busy */
 182         if (!(XMEGANVM_WaitWhileNVMControllerBusy()))
 183           return false;
 184
 185         /* Send the READNVM command to the NVM controller for reading of an arbitrary location */
 186         XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
 187         XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_CMD);
 188         XPROGTarget_SendByte(XMEGA_NVM_CMD_READNVM);
 189
 190         /* Load the PDI pointer register with the start address we want to read from */
 191         XPROGTarget_SendByte(PDI_CMD_ST | (PDI_POINTER_DIRECT << 2) | PDI_DATSIZE_4BYTES);
 192         XMEGANVM_SendAddress(ReadAddress);
 193
 194         /* Send the REPEAT command with the specified number of bytes to read */
 195         XPROGTarget_SendByte(PDI_CMD_REPEAT | PDI_DATSIZE_1BYTE);
 196         XPROGTarget_SendByte(ReadSize - 1);
 197
 198         /* Send a LD command with indirect access and postincrement to read out the bytes */
 199         XPROGTarget_SendByte(PDI_CMD_LD | (PDI_POINTER_INDIRECT_PI << 2) | PDI_DATSIZE_1BYTE);
 200         while (ReadSize--)
 201           *(ReadBuffer++) = XPROGTarget_ReceiveByte();
 202
 203         return true;
 204 }
 205
 206 /** Writes byte addressed memory to the target's memory spaces.
 207  *
 208  *  \param[in]  WriteCommand  Command to send to the device to write each memory byte
 209  *  \param[in]  WriteAddress  Address to write to within the target's address space
 210  *  \param[in]  Byte          Byte to write to the target
 211  *
 212  *  \return Boolean true if the command sequence complete successfully
 213  */
 214 bool XMEGANVM_WriteByteMemory(const uint8_t WriteCommand, const uint32_t WriteAddress, const uint8_t Byte)
 215 {
 216         /* Wait until the NVM controller is no longer busy */
 217         if (!(XMEGANVM_WaitWhileNVMControllerBusy()))
 218           return false;
 219
 220         /* Send the memory write command to the target */
 221         XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
 222         XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_CMD);
 223         XPROGTarget_SendByte(WriteCommand);
 224
 225         /* Send new memory byte to the memory to the target */
 226         XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
 227         XMEGANVM_SendAddress(WriteAddress);
 228         XPROGTarget_SendByte(Byte);
 229
 230         return true;
 231 }
 232
 233 /** Writes page addressed memory to the target's memory spaces.
 234  *
 235  *  \param[in]  WriteBuffCommand  Command to send to the device to write a byte to the memory page buffer
 236  *  \param[in]  EraseBuffCommand  Command to send to the device to erase the memory page buffer
 237  *  \param[in]  WritePageCommand  Command to send to the device to write the page buffer to the destination memory
 238  *  \param[in]  PageMode          Bitfield indicating what operations need to be executed on the specified page
 239  *  \param[in]  WriteAddress      Start address to write the page data to within the target's address space
 240  *  \param[in]  WriteBuffer       Buffer to source data from
 241  *  \param[in]  WriteSize         Number of bytes to write
 242  *
 243  *  \return Boolean true if the command sequence complete successfully
 244  */
 245 bool XMEGANVM_WritePageMemory(const uint8_t WriteBuffCommand, const uint8_t EraseBuffCommand,
 246                               const uint8_t WritePageCommand, const uint8_t PageMode, const uint32_t WriteAddress,
 247                               const uint8_t* WriteBuffer, uint16_t WriteSize)
 248 {
 249         if (PageMode & XPRG_PAGEMODE_ERASE)
 250         {
 251                 /* Wait until the NVM controller is no longer busy */
 252                 if (!(XMEGANVM_WaitWhileNVMControllerBusy()))
 253                   return false;
 254
 255                 /* Send the memory buffer erase command to the target */
 256                 XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
 257                 XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_CMD);
 258                 XPROGTarget_SendByte(EraseBuffCommand);
 259
 260                 /* Set CMDEX bit in NVM CTRLA register to start the buffer erase */
 261                 XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
 262                 XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_CTRLA);
 263                 XPROGTarget_SendByte(1 << 0);
 264         }
 265
 266         if (WriteSize)
 267         {
 268                 /* Wait until the NVM controller is no longer busy */
 269                 if (!(XMEGANVM_WaitWhileNVMControllerBusy()))
 270                   return false;
 271
 272                 /* Send the memory buffer write command to the target */
 273                 XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
 274                 XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_CMD);
 275                 XPROGTarget_SendByte(WriteBuffCommand);
 276
 277                 /* Load the PDI pointer register with the start address we want to write to */
 278                 XPROGTarget_SendByte(PDI_CMD_ST | (PDI_POINTER_DIRECT << 2) | PDI_DATSIZE_4BYTES);
 279                 XMEGANVM_SendAddress(WriteAddress);
 280
 281                 /* Send the REPEAT command with the specified number of bytes to write */
 282                 XPROGTarget_SendByte(PDI_CMD_REPEAT | PDI_DATSIZE_1BYTE);
 283                 XPROGTarget_SendByte(WriteSize - 1);
 284
 285                 /* Send a ST command with indirect access and postincrement to write the bytes */
 286                 XPROGTarget_SendByte(PDI_CMD_ST | (PDI_POINTER_INDIRECT_PI << 2) | PDI_DATSIZE_1BYTE);
 287                 while (WriteSize--)
 288                   XPROGTarget_SendByte(*(WriteBuffer++));
 289         }
 290
 291         if (PageMode & XPRG_PAGEMODE_WRITE)
 292         {
 293                 /* Wait until the NVM controller is no longer busy */
 294                 if (!(XMEGANVM_WaitWhileNVMControllerBusy()))
 295                   return false;
 296
 297                 /* Send the memory write command to the target */
 298                 XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
 299                 XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_CMD);
 300                 XPROGTarget_SendByte(WritePageCommand);
 301
 302                 /* Send the address of the first page location to write the memory page */
 303                 XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
 304                 XMEGANVM_SendAddress(WriteAddress);
 305                 XPROGTarget_SendByte(0x00);
 306         }
 307
 308         return true;
 309 }
 310
 311 /** Erases a specific memory space of the target.
 312  *
 313  *  \param[in] EraseCommand  NVM erase command to send to the device
 314  *  \param[in] Address  Address inside the memory space to erase
 315  *
 316  *  \return Boolean true if the command sequence complete successfully
 317  */
 318 bool XMEGANVM_EraseMemory(const uint8_t EraseCommand, const uint32_t Address)
 319 {
 320         /* Wait until the NVM controller is no longer busy */
 321         if (!(XMEGANVM_WaitWhileNVMControllerBusy()))
 322           return false;
 323
 324         /* Send the memory erase command to the target */
 325         XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
 326         XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_CMD);
 327         XPROGTarget_SendByte(EraseCommand);
 328
 329         /* Chip erase is handled separately, since it's procedure is different to other erase types */
 330         if (EraseCommand == XMEGA_NVM_CMD_CHIPERASE)
 331         {
 332                 /* Set CMDEX bit in NVM CTRLA register to start the chip erase */
 333                 XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
 334                 XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_CTRLA);
 335                 XPROGTarget_SendByte(1 << 0);
 336         }
 337         else
 338         {
 339                 /* Other erase modes just need us to address a byte within the target memory space */
 340                 XPROGTarget_SendByte(PDI_CMD_STS | (PDI_DATSIZE_4BYTES << 2));
 341                 XMEGANVM_SendAddress(Address);
 342                 XPROGTarget_SendByte(0x00);
 343         }
 344
 345         /* Wait until the NVM bus is ready again */
 346         if (!(XMEGANVM_WaitWhileNVMBusBusy()))
 347           return false;
 348
 349         return true;
 350 }
 351
 352 #endif