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Make TPI programming protocol program in words, not bytes to satisfy the datasheet conditions.

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This commit is contained in:
Dean Camera 2010-02-02 03:22:45 +00:00
parent 4d246a82cb
commit b736a5ef2b
3 changed files with 23 additions and 8 deletions
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23
Projects/AVRISP-MKII/Lib/XPROG/TINYNVM.c
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@ -141,11 +141,11 @@ bool TINYNVM_ReadMemory(const uint16_t ReadAddress, uint8_t* ReadBuffer, uint16_
return true;
}
/** Writes byte addressed memory to the target's memory spaces.
/** 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
* \param[in] WriteLength Total number of bytes to write to the device (must be an integer multiple of 2)
*
* \return Boolean true if the command sequence complete successfully
*/
@ -154,6 +154,10 @@ bool TINYNVM_WriteMemory(const uint16_t WriteAddress, const uint8_t* WriteBuffer
/* 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 bytes, abort programming */
if (WriteLength & 0x01)
return false;
/* Set the NVM control register to the WORD WRITE command for memory reading */
TINYNVM_SendWriteNVMRegister(XPROG_Param_NVMCMDRegAddr);
@ -162,11 +166,22 @@ bool TINYNVM_WriteMemory(const uint16_t WriteAddress, const uint8_t* WriteBuffer
/* Send the address of the location to write to */
TINYNVM_SendPointerAddress(WriteAddress);
while (WriteLength--)
while (WriteLength)
{
/* Write the byte of data to the target */
/* 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 read out a whole word */
WriteLength -= 2;
}
return true;