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| author | Dean Camera <dean@fourwalledcubicle.com> | 2010-04-30 08:27:21 +0000 |
|---|---|---|
| committer | Dean Camera <dean@fourwalledcubicle.com> | 2010-04-30 08:27:21 +0000 |
| commit | ceb16ee24f1e6add5e2ad0398369c24d2d868cd8 (patch) | |
| tree | e8a588f50420aa51ac15e08f67eee1af23ea6ccf /Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c | |
| parent | 9cad677ebbd2fc4ea069f98335f8467b16dbb2cb (diff) | |
| download | lufa-ceb16ee24f1e6add5e2ad0398369c24d2d868cd8.tar.gz lufa-ceb16ee24f1e6add5e2ad0398369c24d2d868cd8.tar.bz2 lufa-ceb16ee24f1e6add5e2ad0398369c24d2d868cd8.zip | |
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.
Diffstat (limited to 'Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c')
| -rw-r--r-- | Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c b/Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c index f63f13a97..7ca0c5e8a 100644 --- a/Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c +++ b/Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c @@ -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;
|