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| author | Dean Camera <dean@fourwalledcubicle.com> | 2009-12-24 03:02:26 +0000 |
|---|---|---|
| committer | Dean Camera <dean@fourwalledcubicle.com> | 2009-12-24 03:02:26 +0000 |
| commit | 35dac470f243d234d72f34cbaeb1d6c8a15bc435 (patch) | |
| tree | e4e4f1f7cdb2c3253ad34437043f9a07f3811616 /Projects/AVRISP/Lib/XPROG/TINYNVM.c | |
| parent | 65fcebf4784486f1cb8da08d7a400963461f61ad (diff) | |
| download | lufa-35dac470f243d234d72f34cbaeb1d6c8a15bc435.tar.gz lufa-35dac470f243d234d72f34cbaeb1d6c8a15bc435.tar.bz2 lufa-35dac470f243d234d72f34cbaeb1d6c8a15bc435.zip | |
Complete TPI protocol code to enter and exit TPI programming mode for the ATTINY 6-pin devices.
Diffstat (limited to 'Projects/AVRISP/Lib/XPROG/TINYNVM.c')
| -rw-r--r-- | Projects/AVRISP/Lib/XPROG/TINYNVM.c | 53 |
1 files changed, 22 insertions, 31 deletions
diff --git a/Projects/AVRISP/Lib/XPROG/TINYNVM.c b/Projects/AVRISP/Lib/XPROG/TINYNVM.c index 5eb59892e..f4b90ffa5 100644 --- a/Projects/AVRISP/Lib/XPROG/TINYNVM.c +++ b/Projects/AVRISP/Lib/XPROG/TINYNVM.c @@ -38,44 +38,35 @@ #if defined(ENABLE_XPROG_PROTOCOL) || defined(__DOXYGEN__)
-/** Busy-waits while the NVM controller is busy performing a NVM operation, such as a FLASH page read or CRC
- * calculation.
+/** Busy-waits while the NVM controller is busy performing a NVM operation, such as a FLASH page read.
*
* \return Boolean true if the NVM controller became ready within the timeout period, false otherwise
*/
-bool XMEGANVM_WaitWhileNVMBusBusy(void)
+bool TINYNVM_WaitWhileNVMBusBusy(void)
{
- // TODO
+ TCNT0 = 0;
+ TIFR0 = (1 << OCF1A);
+
+ uint8_t TimeoutMS = TINY_NVM_BUSY_TIMEOUT_MS;
- return false;
-}
+ /* Poll the STATUS register to check to see if NVM access has been enabled */
+ while (TimeoutMS)
+ {
+ /* Send the SLDCS command to read the TPI STATUS register to see the NVM bus is active */
+ XPROGTarget_SendByte(TPI_CMD_SLDCS | TPI_STATUS_REG);
+ if (XPROGTarget_ReceiveByte() & 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 true if the NVM controller became ready within the timeout period, false otherwise
- */
-bool XMEGANVM_WaitWhileNVMControllerBusy(void)
-{
- // TODO
+ if (TIFR0 & (1 << OCF1A))
+ {
+ TIFR0 = (1 << OCF1A);
+ TimeoutMS--;
+ }
+ }
return false;
}
-/** Retrieves the CRC value of the given memory space.
- *
- * \param[in] CRCCommand NVM CRC command to issue to the target
- * \param[out] CRCDest CRC Destination when read from the target
- *
- * \return Boolean true if the command sequence complete successfully
- */
-bool XMEGANVM_GetMemoryCRC(const uint8_t CRCCommand, uint32_t* const CRCDest)
-{
- // TODO
-
- return true;
-}
-
/** Reads memory from the target's memory spaces.
*
* \param[in] ReadAddress Start address to read from within the target's address space
@@ -84,7 +75,7 @@ bool XMEGANVM_GetMemoryCRC(const uint8_t CRCCommand, uint32_t* const CRCDest) *
* \return Boolean true if the command sequence complete successfully
*/
-bool XMEGANVM_ReadMemory(const uint32_t ReadAddress, uint8_t* ReadBuffer, const uint16_t ReadSize)
+bool TINYNVM_ReadMemory(const uint32_t ReadAddress, uint8_t* ReadBuffer, const uint16_t ReadSize)
{
// TODO
@@ -99,7 +90,7 @@ bool XMEGANVM_ReadMemory(const uint32_t ReadAddress, uint8_t* ReadBuffer, const *
* \return Boolean true if the command sequence complete successfully
*/
-bool XMEGANVM_WriteMemory(const uint8_t WriteCommand, const uint32_t WriteAddress, const uint8_t* WriteBuffer)
+bool TINYNVM_WriteMemory(const uint8_t WriteCommand, const uint32_t WriteAddress, const uint8_t* WriteBuffer)
{
// TODO
@@ -113,7 +104,7 @@ bool XMEGANVM_WriteMemory(const uint8_t WriteCommand, const uint32_t WriteAddres *
* \return Boolean true if the command sequence complete successfully
*/
-bool XMEGANVM_EraseMemory(const uint8_t EraseCommand, const uint32_t Address)
+bool TINYNVM_EraseMemory(const uint8_t EraseCommand, const uint32_t Address)
{
// TODO
|