rebellion/libpinproc
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Added debug for startup crashes, and put a while loop of 50 max iterations around VerifyChipID().

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This commit is contained in:
gstellenberg
2009-10-25 15:05:58 -05:00
parent 00724e58e3
commit 9550ba1223
1 changed files with 19 additions and 11 deletions
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30
src/PRDevice.cpp
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@@ -785,7 +785,7 @@ PRResult PRDevice::PRJTAGGetStatus(PRJTAGStatus * status)
PRResult PRDevice::Open()
{
uint32_t temp_word;
uint32_t temp_word,i;
PRResult res = PRHardwareOpen();
if (res == kPRSuccess)
{
@@ -819,18 +819,20 @@ PRResult PRDevice::Open()
SwitchUpdateConfig(&switchConfig);
// Flush read data to ensure VerifyChipID starts with clean buffer.
// Do it twice with a delay in between to ensure that any data in the P-ROC
// while the buffer is being flushed the first time is flushed the second time.
// It's possible the P-ROC has a lot of data stored up in internal buffers. So if
// the verify still fails, do a bunch of flushes.
res = FlushReadBuffer();
PRSleep(100);
res = FlushReadBuffer();
if (VerifyChipID() == kPRFailure) {
uint32_t verify_ctr = 0;
res = kPRSuccess;
while (VerifyChipID() == kPRFailure && verify_ctr++ < 50) {
// Since the FPGA didn't appear to be responding properly, send the FPGA's FTDI
// initialization sequence. This is a set of bytes the FPGA is waiting to receive
// before it allows access deeper into the chip. This keeps garbage from getting
// in and wreaking havoc before software is up and running.
DEBUG(PRLog(kPRLogError, "Verification of chip ID failed. Flushing read buffer and re-verifying chip ID.\n"));
DEBUG(PRLog(kPRLogInfo, "Initializing P-ROC...\n"));
res = FlushReadBuffer();
PRSleep(100);
temp_word = P_ROC_INIT_PATTERN_A;
res = WriteData(&temp_word, 1);
temp_word = P_ROC_INIT_PATTERN_B;
@@ -839,7 +841,6 @@ PRResult PRDevice::Open()
if (res == kPRFailure)
DEBUG(PRLog(kPRLogWarning, "Unable to read Chip ID - P-ROC could not be initialized.\n"));
}
else res = kPRSuccess;
}
return res;
@@ -863,7 +864,7 @@ PRResult PRDevice::VerifyChipID()
const int bufferWords = 5;
uint32_t buffer[bufferWords];
//uint32_t temp_word;
uint32_t max_count;
uint32_t max_count, i;
//std::cout << "Requesting FPGA Chip ID: ";
rc = RequestData(P_ROC_MANAGER_SELECT, P_ROC_REG_CHIP_ID_ADDR, 4);
@@ -882,6 +883,14 @@ PRResult PRDevice::VerifyChipID()
int wordsRead = ReadData(buffer, bufferWords);
if (wordsRead == 5) {
if (buffer[1] != P_ROC_CHIP_ID)
{
DEBUG(PRLog(kPRLogError, "Error in VerifyID(): Dumping buffer\n"));
for (i = 0; i < wordsRead; i++)
DEBUG(PRLog(kPRLogError, "buffer[%d]: 0x%x\n", i, buffer[i]));
rc = kPRFailure;
}
else rc = kPRSuccess;
//std::cout << rc << " words read. \n"
DEBUG(PRLog(kPRLogError, "FPGA Chip ID: 0x%x\n", buffer[1]));
DEBUG(PRLog(kPRLogError, "FPGA Chip Version/Rev: %d.%d\n", buffer[2] >> 16, buffer[2] & 0xffff));
@@ -890,16 +899,15 @@ PRResult PRDevice::VerifyChipID()
if (IsStern(buffer[4])) readMachineType = kPRMachineSternWhitestar; // Choose SAM or Whitestar, doesn't matter.
else readMachineType = kPRMachineWPC; // Choose WPC or WPC95, doesn't matter.
rc = kPRSuccess;
}
else {
DEBUG(PRLog(kPRLogError, "Error reading Chip IP and Version. Read %d words instead of 5. The first 2 were: 0x%x and 0x%x.\n", wordsRead, buffer[0], buffer[1]));
rc = kPRFailure;
}
}
else
{
// Return failure without logging; calling function must log.
DEBUG(PRLog(kPRLogError, "Verify Chip ID took too long to receive data\n"));
rc = kPRFailure;
}
return (rc);
@@ -1066,7 +1074,7 @@ PRResult PRDevice::FlushReadBuffer()
//uint32_t rd_buffer[3];
numBytes = CollectReadData();
k = 0;
//std::cout << "Flushing rd buffer of " << num_words << "words\n";
DEBUG(PRLog(kPRLogError, "Flushing Read Buffer\n", rc));
//while (k < numBytes) {
// rc = ReadData(rd_buffer, 1);