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

[pub/USBasp.git] / Projects / AVRISP-MKII / Lib / XPROG / XMEGANVM.c

diff --git a/Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c b/Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c
index f63f13a..7ca0c5e 100644 (file)
--- a/Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c
+++ b/Projects/AVRISP-MKII/Lib/XPROG/XMEGANVM.c
@@ -76,7 +76,15 @@ bool XMEGANVM_WaitWhileNVMBusBusy(void)
        {\r
                /* Send the LDCS command to read the PDI STATUS register to see the NVM bus is active */\r
                XPROGTarget_SendByte(PDI_CMD_LDCS | PDI_STATUS_REG);\r
-               if (XPROGTarget_ReceiveByte() & PDI_STATUS_NVM)\r
+               \r
+               uint8_t StatusRegister = XPROGTarget_ReceiveByte();\r
+               \r
+               /* We might have timed out waiting for the status register read response, check here */\r
+               if (!(TimeoutMSRemaining))\r
+                 return false;\r
+               \r
+               /* Check the status register read response to see if the NVM bus is enabled */\r
+               if (StatusRegister & PDI_STATUS_NVM)\r
                {\r
                        TimeoutMSRemaining = COMMAND_TIMEOUT_MS;\r
                        return true;\r
@@ -107,8 +115,14 @@ bool XMEGANVM_WaitWhileNVMControllerBusy(void)
                XPROGTarget_SendByte(PDI_CMD_LDS | (PDI_DATSIZE_4BYTES << 2));\r
                XMEGANVM_SendNVMRegAddress(XMEGA_NVM_REG_STATUS);\r
                \r
+               uint8_t StatusRegister = XPROGTarget_ReceiveByte();\r
+\r
+               /* We might have timed out waiting for the status register read response, check here */\r
+               if (!(TimeoutMSRemaining))\r
+                 return false;\r
+\r
                /* Check to see if the BUSY flag is still set */\r
-               if (!(XPROGTarget_ReceiveByte() & (1 << 7)))\r
+               if (!(StatusRegister & (1 << 7)))\r
                {\r
                        TimeoutMSRemaining = COMMAND_TIMEOUT_MS;\r
                        return true;\r