Commit ceb16ee2 authored by Dean Camera's avatar Dean Camera
Browse files

Make sure that the NVM bus/controller busy waits in the AVRISP MKII clone...

Make sure that the NVM bus/controller busy waits in the AVRISP MKII clone project abort properly if a timeout occurs while waiting for a response.
parent 9cad677e
......@@ -81,7 +81,15 @@ bool TINYNVM_WaitWhileNVMBusBusy(void)
{
/* 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)
uint8_t StatusRegister = XPROGTarget_ReceiveByte();
/* We might have timed out waiting for the status register read response, check here */
if (!(TimeoutMSRemaining))
return false;
/* Check the status register read response to see if the NVM bus is enabled */
if (StatusRegister & TPI_STATUS_NVM)
{
TimeoutMSRemaining = COMMAND_TIMEOUT_MS;
return true;
......@@ -111,8 +119,14 @@ bool TINYNVM_WaitWhileNVMControllerBusy(void)
/* Send the SIN command to read the TPI STATUS register to see the NVM bus is busy */
TINYNVM_SendReadNVMRegister(XPROG_Param_NVMCSRRegAddr);
uint8_t StatusRegister = XPROGTarget_ReceiveByte();
/* We might have timed out waiting for the status register read response, check here */
if (!(TimeoutMSRemaining))
return false;
/* Check to see if the BUSY flag is still set */
if (!(XPROGTarget_ReceiveByte() & (1 << 7)))
if (!(StatusRegister & (1 << 7)))
{
TimeoutMSRemaining = COMMAND_TIMEOUT_MS;
return true;
......
......@@ -76,7 +76,15 @@ bool XMEGANVM_WaitWhileNVMBusBusy(void)
{
/* Send the LDCS command to read the PDI STATUS register to see the NVM bus is active */
XPROGTarget_SendByte(PDI_CMD_LDCS | PDI_STATUS_REG);
if (XPROGTarget_ReceiveByte() & PDI_STATUS_NVM)
uint8_t StatusRegister = XPROGTarget_ReceiveByte();
/* We might have timed out waiting for the status register read response, check here */
if (!(TimeoutMSRemaining))
return false;
/* Check the status register read response to see if the NVM bus is enabled */
if (StatusRegister & PDI_STATUS_NVM)
{
TimeoutMSRemaining = COMMAND_TIMEOUT_MS;
return true;
......@@ -107,8 +115,14 @@ bool XMEGANVM_WaitWhileNVMControllerBusy(void)
XPROGTarget_SendByte(PDI_CMD_LDS | (PDI_DATSIZE_4BYTES << 2));
XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_STATUS);
uint8_t StatusRegister = XPROGTarget_ReceiveByte();
/* We might have timed out waiting for the status register read response, check here */
if (!(TimeoutMSRemaining))
return false;
/* Check to see if the BUSY flag is still set */
if (!(XPROGTarget_ReceiveByte() & (1 << 7)))
if (!(StatusRegister & (1 << 7)))
{
TimeoutMSRemaining = COMMAND_TIMEOUT_MS;
return true;
......
......@@ -453,15 +453,25 @@ static void XPROGTarget_SetRxMode(void)
{
BITBANG_PDIDATA_DDR &= ~BITBANG_PDIDATA_MASK;
BITBANG_PDIDATA_PORT &= ~BITBANG_PDIDATA_MASK;
/* Wait until DATA line has been pulled up to idle by the target */
while (!(BITBANG_PDIDATA_PIN & BITBANG_PDIDATA_MASK) && TimeoutMSRemaining)
{
/* Manage software timeout */
if (TIFR0 & (1 << OCF0A))
{
TIFR0 |= (1 << OCF0A);
TimeoutMSRemaining--;
}
}
}
else
{
BITBANG_TPIDATA_DDR &= ~BITBANG_TPIDATA_MASK;
BITBANG_TPIDATA_PORT &= ~BITBANG_TPIDATA_MASK;
}
/* Wait until DATA line has been pulled up to idle by the target */
while (!(BITBANG_PDIDATA_PIN & BITBANG_PDIDATA_MASK) && TimeoutMSRemaining)
while (!(BITBANG_TPIDATA_PIN & BITBANG_TPIDATA_MASK) && TimeoutMSRemaining)
{
/* Manage software timeout */
if (TIFR0 & (1 << OCF0A))
......@@ -470,6 +480,7 @@ static void XPROGTarget_SetRxMode(void)
TimeoutMSRemaining--;
}
}
}
#endif
if (TimeoutMSRemaining)
......
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