Use _delay_us() function in the XPROGTarget.c file to ensure timing requirements...

[pub/USBasp.git] / Projects / AVRISP-MKII / Lib / XPROG / TINYNVM.c

diff --git a/Projects/AVRISP-MKII/Lib/XPROG/TINYNVM.c b/Projects/AVRISP-MKII/Lib/XPROG/TINYNVM.c
index 4292faa..e751303 100644 (file)
--- a/Projects/AVRISP-MKII/Lib/XPROG/TINYNVM.c
+++ b/Projects/AVRISP-MKII/Lib/XPROG/TINYNVM.c
@@ -1,13 +1,13 @@
 /*\r
              LUFA Library\r
 /*\r
              LUFA Library\r

-     Copyright (C) Dean Camera, 2009.\r
+     Copyright (C) Dean Camera, 2010.\r

               \r
   dean [at] fourwalledcubicle [dot] com\r
       www.fourwalledcubicle.com\r
 */\r
 \r
 /*\r
               \r
   dean [at] fourwalledcubicle [dot] com\r
       www.fourwalledcubicle.com\r
 */\r
 \r
 /*\r

-  Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
+  Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)\r

 \r
   Permission to use, copy, modify, distribute, and sell this \r
   software and its documentation for any purpose is hereby granted\r
 \r
   Permission to use, copy, modify, distribute, and sell this \r
   software and its documentation for any purpose is hereby granted\r


@@ -39,6 +39,38 @@
 #if defined(ENABLE_XPROG_PROTOCOL) || defined(__DOXYGEN__)\r
 #warning TPI Protocol support is currently incomplete and is not suitable for general use.\r
 \r
 #if defined(ENABLE_XPROG_PROTOCOL) || defined(__DOXYGEN__)\r
 #warning TPI Protocol support is currently incomplete and is not suitable for general use.\r
 \r

+/** Sends the given pointer address to the target's TPI pointer register */\r
+static void TINYNVM_SendPointerAddress(const uint16_t AbsoluteAddress)\r
+{\r
+       /* Send the given 16-bit address to the target, LSB first */\r
+       XPROGTarget_SendByte(TPI_CMD_SSTPR | 0);\r
+       XPROGTarget_SendByte(((uint8_t*)&AbsoluteAddress)[0]);\r
+       XPROGTarget_SendByte(TPI_CMD_SSTPR | 1);\r
+       XPROGTarget_SendByte(((uint8_t*)&AbsoluteAddress)[1]);\r
+}\r
+\r
+/** Sends a SIN command to the target with the specified I/O address, ready for the data byte to be written.\r
+ *\r
+ *  \param[in] Address  6-bit I/O address to write to in the target's I/O memory space\r
+ */\r
+static void TINYNVM_SendReadNVMRegister(uint8_t Address)\r
+{\r
+       /* The TPI command for reading from the I/O space uses strange addressing, where the I/O address's upper\r
+        * two bits of the 6-bit address are shifted left once */\r
+       XPROGTarget_SendByte(TPI_CMD_SIN | ((Address & 0x30) << 1) | (Address & 0x0F));\r
+}\r
+\r
+/** Sends a SOUT command to the target with the specified I/O address, ready for the data byte to be read.\r
+ *\r
+ *  \param[in] Address  6-bit I/O address to read from in the target's I/O memory space\r
+ */\r
+static void TINYNVM_SendWriteNVMRegister(uint8_t Address)\r
+{\r
+       /* The TPI command for writing to the I/O space uses wierd addressing, where the I/O address's upper\r
+        * two bits of the 6-bit address are shifted left once */\r
+       XPROGTarget_SendByte(TPI_CMD_SOUT | ((Address & 0x30) << 1) | (Address & 0x0F));\r
+}\r
+\r

 /** Busy-waits while the NVM controller is busy performing a NVM operation, such as a FLASH page read.\r
  *\r
  *  \return Boolean true if the NVM controller became ready within the timeout period, false otherwise\r
 /** Busy-waits while the NVM controller is busy performing a NVM operation, such as a FLASH page read.\r
  *\r
  *  \return Boolean true if the NVM controller became ready within the timeout period, false otherwise\r


@@ -57,46 +89,106 @@ bool TINYNVM_WaitWhileNVMBusBusy(void)
        return false;\r
 }\r
 \r
        return false;\r
 }\r
 \r

+/** Waits while the target's NVM controller is busy performing an operation, exiting if the\r
+ *  timeout period expires.\r
+ *\r
+ *  \return Boolean true if the NVM controller became ready within the timeout period, false otherwise\r
+ */\r
+bool TINYNVM_WaitWhileNVMControllerBusy(void)\r
+{\r
+       /* Poll the STATUS register to check to see if NVM access has been enabled */\r
+       while (TimeoutMSRemaining)\r
+       {\r
+               /* Send the SIN command to read the TPI STATUS register to see the NVM bus is busy */\r
+               TINYNVM_SendReadNVMRegister(XPROG_Param_NVMCSRRegAddr);\r
+\r
+               /* Check to see if the BUSY flag is still set */\r
+               if (!(XPROGTarget_ReceiveByte() & (1 << 7)))\r
+                 return true;\r
+       }\r
+       \r
+       return false;\r
+}\r
+\r

 /** Reads memory from the target's memory spaces.\r
  *\r
  *  \param[in]  ReadAddress  Start address to read from within the target's address space\r
  *  \param[out] ReadBuffer   Buffer to store read data into\r
 /** Reads memory from the target's memory spaces.\r
  *\r
  *  \param[in]  ReadAddress  Start address to read from within the target's address space\r
  *  \param[out] ReadBuffer   Buffer to store read data into\r

- *  \param[in]  ReadSize     Number of bytes to read\r
+ *  \param[in]  ReadSize     Length of the data to read from the device\r

  *\r
  *  \return Boolean true if the command sequence complete successfully\r
  */\r
  *\r
  *  \return Boolean true if the command sequence complete successfully\r
  */\r

-bool TINYNVM_ReadMemory(const uint32_t ReadAddress, uint8_t* ReadBuffer, const uint16_t ReadSize)\r
+bool TINYNVM_ReadMemory(const uint16_t ReadAddress, uint8_t* ReadBuffer, uint16_t ReadSize)\r

 {\r
 {\r

-       // TODO\r
+       /* Wait until the NVM controller is no longer busy */\r
+       if (!(TINYNVM_WaitWhileNVMControllerBusy()))\r
+         return false;\r
+\r
+       /* Set the NVM control register to the NO OP command for memory reading */\r
+       TINYNVM_SendWriteNVMRegister(XPROG_Param_NVMCMDRegAddr);\r
+       XPROGTarget_SendByte(TINY_NVM_CMD_NOOP);\r
+       \r
+       /* Send the address of the location to read from */\r
+       TINYNVM_SendPointerAddress(ReadAddress);\r
+       \r
+       while (ReadSize--)\r
+       {\r
+               /* Read the byte of data from the target */\r
+               XPROGTarget_SendByte(TPI_CMD_SLD | TPI_POINTER_INDIRECT_PI);\r
+               *(ReadBuffer++) = XPROGTarget_ReceiveByte();\r
+       }\r

        \r
        return true;\r
 }\r
 \r
 /** Writes byte addressed memory to the target's memory spaces.\r
  *\r
        \r
        return true;\r
 }\r
 \r
 /** Writes byte addressed memory to the target's memory spaces.\r
  *\r

- *  \param[in]  WriteCommand  Command to send to the device to write each memory byte\r

  *  \param[in]  WriteAddress  Start address to write to within the target's address space\r
  *  \param[in]  WriteBuffer   Buffer to source data from\r
  *  \param[in]  WriteAddress  Start address to write to within the target's address space\r
  *  \param[in]  WriteBuffer   Buffer to source data from\r

+ *  \param[in]  WriteLength   Total number of bytes to write to the device\r

  *\r
  *  \return Boolean true if the command sequence complete successfully\r
  */\r
  *\r
  *  \return Boolean true if the command sequence complete successfully\r
  */\r

-bool TINYNVM_WriteMemory(const uint8_t WriteCommand, const uint32_t WriteAddress, const uint8_t* WriteBuffer)\r
+bool TINYNVM_WriteMemory(const uint16_t WriteAddress, const uint8_t* WriteBuffer, uint16_t WriteLength)\r

 {\r
 {\r

-       // TODO\r
+       /* Wait until the NVM controller is no longer busy */\r
+       if (!(TINYNVM_WaitWhileNVMControllerBusy()))\r
+         return false;\r
+\r
+       /* Set the NVM control register to the WORD WRITE command for memory reading */\r
+       TINYNVM_SendWriteNVMRegister(XPROG_Param_NVMCMDRegAddr);\r
+       XPROGTarget_SendByte(TINY_NVM_CMD_WORDWRITE);\r
+       \r
+       /* Send the address of the location to write to */\r
+       TINYNVM_SendPointerAddress(WriteAddress);\r
+       \r
+       while (WriteLength--)\r
+       {\r
+               /* Write the byte of data to the target */\r
+               XPROGTarget_SendByte(TPI_CMD_SST | TPI_POINTER_INDIRECT_PI);\r
+               XPROGTarget_SendByte(*(WriteBuffer++));\r
+       }\r

        \r
        return true;\r
 }\r
 \r
        \r
        return true;\r
 }\r
 \r

-/** Erases a specific memory space of the target.\r
- *\r
- *  \param[in] EraseCommand  NVM erase command to send to the device\r
- *  \param[in] Address  Address inside the memory space to erase\r
+/** Erases the target's memory space.\r

  *\r
  *  \return Boolean true if the command sequence complete successfully\r
  */\r
  *\r
  *  \return Boolean true if the command sequence complete successfully\r
  */\r

-bool TINYNVM_EraseMemory(const uint8_t EraseCommand, const uint32_t Address)\r
+bool TINYNVM_EraseMemory(void)\r

 {\r
 {\r

-       // TODO\r
+       /* Wait until the NVM controller is no longer busy */\r
+       if (!(TINYNVM_WaitWhileNVMControllerBusy()))\r
+         return false;\r
+\r
+       /* Set the NVM control register to the CHIP ERASE command to erase the target */\r
+       TINYNVM_SendWriteNVMRegister(XPROG_Param_NVMCMDRegAddr);\r
+       XPROGTarget_SendByte(TINY_NVM_CMD_CHIPERASE);   \r
+\r
+       /* Wait until the NVM bus is ready again */\r
+       if (!(TINYNVM_WaitWhileNVMBusBusy()))\r
+         return false;\r

        \r
        return true;\r
 }\r
        \r
        return true;\r
 }\r