Projects/AVRISP/Lib/XPROG/TINYNVM.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2009.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, and distribute this software
  13   and its documentation for any purpose and without fee is hereby
  14   granted, provided that the above copyright notice appear in all
  15   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 TINY target's NVM module.
  34  */
  35
  36 #define  INCLUDE_FROM_TINYNVM_C
  37 #include "TINYNVM.h"
  38
  39 #if defined(ENABLE_XPROG_PROTOCOL) || defined(__DOXYGEN__)
  40
  41 /** Busy-waits while the NVM controller is busy performing a NVM operation, such as a FLASH page read.
  42  *
  43  *  \return Boolean true if the NVM controller became ready within the timeout period, false otherwise
  44  */
  45 bool TINYNVM_WaitWhileNVMBusBusy(void)
  46 {
  47         TCNT0 = 0;
  48         TIFR0 = (1 << OCF1A);
  49
  50         uint8_t TimeoutMS = TINY_NVM_BUSY_TIMEOUT_MS;
  51
  52         /* Poll the STATUS register to check to see if NVM access has been enabled */
  53         while (TimeoutMS)
  54         {
  55                 /* Send the SLDCS command to read the TPI STATUS register to see the NVM bus is active */
  56                 XPROGTarget_SendByte(TPI_CMD_SLDCS | TPI_STATUS_REG);
  57                 if (XPROGTarget_ReceiveByte() & TPI_STATUS_NVM)
  58                   return true;
  59
  60                 if (TIFR0 & (1 << OCF1A))
  61                 {
  62                         TIFR0 = (1 << OCF1A);
  63                         TimeoutMS--;
  64                 }
  65         }
  66
  67         return false;
  68 }
  69
  70 /** Reads memory from the target's memory spaces.
  71  *
  72  *  \param[in]  ReadAddress  Start address to read from within the target's address space
  73  *  \param[out] ReadBuffer   Buffer to store read data into
  74  *  \param[in]  ReadSize     Number of bytes to read
  75  *
  76  *  \return Boolean true if the command sequence complete successfully
  77  */
  78 bool TINYNVM_ReadMemory(const uint32_t ReadAddress, uint8_t* ReadBuffer, const uint16_t ReadSize)
  79 {
  80         // TODO
  81
  82         return true;
  83 }
  84
  85 /** Writes byte addressed memory to the target's memory spaces.
  86  *
  87  *  \param[in]  WriteCommand  Command to send to the device to write each memory byte
  88  *  \param[in]  WriteAddress  Start address to write to within the target's address space
  89  *  \param[in]  WriteBuffer   Buffer to source data from
  90  *
  91  *  \return Boolean true if the command sequence complete successfully
  92  */
  93 bool TINYNVM_WriteMemory(const uint8_t WriteCommand, const uint32_t WriteAddress, const uint8_t* WriteBuffer)
  94 {
  95         // TODO
  96
  97         return true;
  98 }
  99
 100 /** Erases a specific memory space of the target.
 101  *
 102  *  \param[in] EraseCommand  NVM erase command to send to the device
 103  *  \param[in] Address  Address inside the memory space to erase
 104  *
 105  *  \return Boolean true if the command sequence complete successfully
 106  */
 107 bool TINYNVM_EraseMemory(const uint8_t EraseCommand, const uint32_t Address)
 108 {
 109         // TODO
 110
 111         return true;
 112 }
 113
 114 #endif