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Fixed a tiny mistake -- forgot to say the name of one of my enums after the typedef.

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Finished making the electrical test work -- I had failed to realize that I have to ignore the ground shorts once they have been found -- otherwise they reappear against EVERY tested pin (because they are always low and I'm testing for low pins -- duh!). Anyway, it was showing way too many shorts, and that's why. Now I independently can find shorts between separate pins without getting flooded with the ground shorts too. Only thing that's missing is the VCC shorts, but I can't do that without pullups (to my knowledge)
This commit is contained in:
Doug Brown 2011-12-18 12:00:22 -08:00
parent beae025d1a
commit 9333b65cde
2 changed files with 68 additions and 11 deletions
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77
tests/simm_electrical_test.c
View File

@ -27,14 +27,20 @@ typedef enum ElectricalTestStage
DoneTesting
} ElectricalTestStage;
// TODO: Remember which lines shorted to ground and don't repeat those errors as being
// shorted to each other?
// Private functions
void SIMMElectricalTest_ResetGroundShorts(void);
void SIMMElectricalTest_AddGroundShort(uint8_t index);
bool SIMMElectricalTest_IsGroundShort(uint8_t index);
int SIMMElectricalTest_Run(void (*errorHandler)(uint8_t, uint8_t))
{
// Returns number of errors found
int numErrors = 0;
// Pins we have determined are shorted to ground
// (We have to ignore them during the second phase of the test)
SIMMElectricalTest_ResetGroundShorts();
Ports_Init();
DelayMS(DELAY_SETTLE_TIME_MS);
@ -71,6 +77,7 @@ int SIMMElectricalTest_Run(void (*errorHandler)(uint8_t, uint8_t))
if (readback & 1) // failure here?
{
errorHandler(failIndex, GROUND_FAIL_INDEX);
SIMMElectricalTest_AddGroundShort(failIndex);
numErrors++;
}
@ -91,6 +98,7 @@ int SIMMElectricalTest_Run(void (*errorHandler)(uint8_t, uint8_t))
if (readback & 1) // failure here?
{
errorHandler(failIndex, GROUND_FAIL_INDEX);
SIMMElectricalTest_AddGroundShort(failIndex);
numErrors++;
}
@ -102,21 +110,28 @@ int SIMMElectricalTest_Run(void (*errorHandler)(uint8_t, uint8_t))
if (!Ports_ReadCS())
{
errorHandler(CS_FAIL_INDEX, GROUND_FAIL_INDEX);
SIMMElectricalTest_AddGroundShort(CS_FAIL_INDEX);
numErrors++;
}
if (!Ports_ReadOE())
{
errorHandler(OE_FAIL_INDEX, GROUND_FAIL_INDEX);
SIMMElectricalTest_AddGroundShort(OE_FAIL_INDEX);
numErrors++;
}
if (!Ports_ReadWE())
{
errorHandler(WE_FAIL_INDEX, GROUND_FAIL_INDEX);
SIMMElectricalTest_AddGroundShort(WE_FAIL_INDEX);
numErrors++;
}
// OK, now we know which lines are shorted to ground.
// We need to keep that in mind, because those lines will now show as shorted
// to ALL other lines...ignore them during tests to find other independent shorts
// Now, check each individual line vs. all other lines on the SIMM for any shorts between them
ElectricalTestStage curStage = TestingAddressLines;
int x = 0;
@ -128,7 +143,7 @@ int SIMMElectricalTest_Run(void (*errorHandler)(uint8_t, uint8_t))
// it means they are shorted to the pin we set as an output.
// This is the fail index of the pin we are outputting a 0 on.
testPinFailIndex = 0;
testPinFailIndex = 0xFE; // Start with a default invalid value...will be replaced though.
if (curStage == TestingAddressLines)
{
@ -137,7 +152,7 @@ int SIMMElectricalTest_Run(void (*errorHandler)(uint8_t, uint8_t))
Ports_SetAddressDDR(addressLineMask); // set it as an output and all other address pins as inputs
Ports_AddressOut_RMW(0, addressLineMask); // set the output pin to output "0" without affecting the input pins
Ports_AddressPullups_RMW(~addressLineMask, SIMM_ADDRESS_PINS_MASK); // turn on the pullups on all input pins
Ports_AddressPullups_RMW(SIMM_ADDRESS_PINS_MASK, ~addressLineMask); // turn on the pullups on all input pins
}
else
{
@ -154,7 +169,7 @@ int SIMMElectricalTest_Run(void (*errorHandler)(uint8_t, uint8_t))
uint32_t dataLineMask = (1UL << x);
Ports_SetDataDDR(dataLineMask);
Ports_DataOut_RMW(0, dataLineMask);
Ports_DataPullups_RMW(~dataLineMask, SIMM_DATA_PINS_MASK);
Ports_DataPullups_RMW(SIMM_DATA_PINS_MASK, ~dataLineMask);
}
else
{
@ -220,7 +235,8 @@ int SIMMElectricalTest_Run(void (*errorHandler)(uint8_t, uint8_t))
// Count any shorted pins
while (readback)
{
if (readback & 1) // failure here?
// failure here?
if ((readback & 1) && !SIMMElectricalTest_IsGroundShort(failIndex))
{
errorHandler(testPinFailIndex, failIndex);
numErrors++;
@ -245,7 +261,8 @@ int SIMMElectricalTest_Run(void (*errorHandler)(uint8_t, uint8_t))
// Count any shorted pins
while (readback)
{
if (readback & 1) // failure here?
// failure here?
if ((readback & 1) && !SIMMElectricalTest_IsGroundShort(failIndex))
{
errorHandler(testPinFailIndex, failIndex);
numErrors++;
@ -257,7 +274,7 @@ int SIMMElectricalTest_Run(void (*errorHandler)(uint8_t, uint8_t))
if (curStage != TestingCS)
{
if (!Ports_ReadCS())
if (!Ports_ReadCS() && !SIMMElectricalTest_IsGroundShort(CS_FAIL_INDEX))
{
errorHandler(testPinFailIndex, CS_FAIL_INDEX);
numErrors++;
@ -266,7 +283,7 @@ int SIMMElectricalTest_Run(void (*errorHandler)(uint8_t, uint8_t))
if (curStage != TestingOE)
{
if (!Ports_ReadOE())
if (!Ports_ReadOE() && !SIMMElectricalTest_IsGroundShort(OE_FAIL_INDEX))
{
errorHandler(testPinFailIndex, OE_FAIL_INDEX);
numErrors++;
@ -275,7 +292,7 @@ int SIMMElectricalTest_Run(void (*errorHandler)(uint8_t, uint8_t))
if (curStage != TestingWE)
{
if (!Ports_ReadWE())
if (!Ports_ReadWE() && !SIMMElectricalTest_IsGroundShort(WE_FAIL_INDEX))
{
errorHandler(testPinFailIndex, WE_FAIL_INDEX);
numErrors++;
@ -310,3 +327,43 @@ int SIMMElectricalTest_Run(void (*errorHandler)(uint8_t, uint8_t))
return numErrors;
}
// Stuff for handling shorts to ground
// (They have to be remembered because the ground shorts will be repeated
// when you test each individual pin against all other pins)
static uint32_t groundShorts[2];
void SIMMElectricalTest_ResetGroundShorts(void)
{
groundShorts[0] = 0;
groundShorts[1] = 0;
}
void SIMMElectricalTest_AddGroundShort(uint8_t index)
{
if (index < 32)
{
groundShorts[0] |= (1UL << index);
}
else if (index < 64)
{
groundShorts[1] |= (1UL << (index - 32));
}
// None are >= 64, no further handling needed
}
bool SIMMElectricalTest_IsGroundShort(uint8_t index)
{
if (index < 32)
{
return ((groundShorts[0] & (1UL << index)) != 0);
}
else if (index < 64)
{
return ((groundShorts[1] & (1UL << (index - 32))) != 0);
}
else
{
return false;
}
}

2
usb_serial/usb_serial.c
View File

@ -111,7 +111,7 @@ typedef enum ProgrammerElectricalTestReply
{
ProgrammerElectricalTestFail,
ProgrammerElectricalTestDone
};
} ProgrammerElectricalTestReply;
static ProgrammerCommandState curCommandState = WaitingForCommand;
static uint8_t byteAddressReceiveCount = 0;