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AVRISP programmer project now has a more robust timeout system, allowing for a doubling of the software USART speed for PDI and TPI programming.

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This commit is contained in:
Dean Camera 2010-02-19 05:17:41 +00:00
parent 04d40897cf
commit ce8d0424b1
8 changed files with 122 additions and 66 deletions
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18
Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c
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@ -72,14 +72,19 @@ static void XMEGANVM_SendNVMRegAddress(const uint8_t Register)
bool XMEGANVM_WaitWhileNVMBusBusy(void)
{
/* Poll the STATUS register to check to see if NVM access has been enabled */
uint8_t TimeoutMSRemaining = 100;
while (TimeoutMSRemaining)
{
/* 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)
return true;
/* Manage software timeout */
if (TIFR0 & (1 << OCF0A))
{
TimeoutMSRemaining = COMMAND_TIMEOUT_MS;
return true;
TIFR0 |= (1 << OCF0A);
TimeoutMSRemaining--;
}
}
@ -94,6 +99,7 @@ bool XMEGANVM_WaitWhileNVMBusBusy(void)
bool XMEGANVM_WaitWhileNVMControllerBusy(void)
{
/* Poll the NVM STATUS register while the NVM controller is busy */
uint8_t TimeoutMSRemaining = 100;
while (TimeoutMSRemaining)
{
/* Send a LDS command to read the NVM STATUS register to check the BUSY flag */
@ -102,9 +108,13 @@ bool XMEGANVM_WaitWhileNVMControllerBusy(void)
/* Check to see if the BUSY flag is still set */
if (!(XPROGTarget_ReceiveByte() & (1 << 7)))
return true;
/* Manage software timeout */
if (TIFR0 & (1 << OCF0A))
{
TimeoutMSRemaining = COMMAND_TIMEOUT_MS;
return true;
TIFR0 |= (1 << OCF0A);
TimeoutMSRemaining--;
}
}