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Optimized chip test for new test board, implemented leakage current limit of 100 pA

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This commit is contained in:
ritt
2017-01-09 16:54:01 +01:00
parent 118ded9ac0
commit 8461281a67
2 changed files with 61 additions and 38 deletions
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software/src/DRS.cpp
+58 -38
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@@ -2728,7 +2728,7 @@ int DRSBoard::SetFrequency(double demand, bool wait)
break;
SoftTrigger();
if (i == 1000) {
printf("PLL did not lock for frequency %lf\n", demand);
printf("PLL did not lock for frequency %1.3lf\n", demand);
return 0;
}
}
@@ -3033,12 +3033,15 @@ int DRSBoard::RAMTest(int flag)
int DRSBoard::ChipTest(int flag)
{
int i, j, tc, n_error, test_board, t;
double freq, real_freq, max_freq;
float waveform[1024], wf0[9][1024], wf1[9][1024];
int i, j, tc, n_error, test_board;
double freq, real_freq, max_freq, t;
float waveform[1024], wf0[9][1024], wf1[9][1024], wft[9][1024];
double lc[9][1024];
int cell_error[9][1024];
double sum = 0, lcmax = 0;
int n = 0, imax, jmax;
int histo[100];
Init();
SetChannelConfig(0, 8, 8);
SetDominoMode(1);
@@ -3104,11 +3107,11 @@ int DRSBoard::ChipTest(int flag)
tc = GetStopCell(0);
GetWave(0, i, waveform, false, tc, 0, false);
for (j=0 ; j<1024; j++)
if (waveform[j] < -100 || waveform[j] > 100) {
if (waveform[j] < -200) {
if (j<5) {
/* skip this cells */
} else {
printf("Cell error on channel %d, cell %d: %1.1lf mV instead 0 mV\n",
printf("Cell error on channel %d, cell %3d: %5.1lf mV instead 0 mV\n",
i, (j+tc)%1024, waveform[j]);
cell_error[i][(j+tc)%1024]++;
}
@@ -3123,6 +3126,7 @@ int DRSBoard::ChipTest(int flag)
/* read and check at +0.5V calibration voltage */
EnableAcal(1, 0.5);
StartDomino();
Sleep(100);
SoftTrigger();
while (IsBusy());
TransferWaves(0, 8);
@@ -3131,11 +3135,11 @@ int DRSBoard::ChipTest(int flag)
tc = GetStopCell(0);
GetWave(0, i, waveform, false, tc, 0, false);
for (j=0 ; j<1024; j++)
if (waveform[j] < 350) {
if (waveform[j] < 200) {
if (j<5) {
/* skip this cell */
} else {
printf("Cell error on channel %d, cell %d: %1.1lf mV instead 400 mV\n",
printf("Cell error on channel %d, cell %3d: %5.1lf mV instead 400 mV\n",
i, (j+tc)%1024, waveform[j]);
cell_error[i][(j+tc)%1024]++;
}
@@ -3150,7 +3154,7 @@ int DRSBoard::ChipTest(int flag)
/* read and check at -0.5V calibration voltage */
EnableAcal(1, -0.5);
StartDomino();
Sleep(10);
Sleep(100);
SoftTrigger();
while (IsBusy());
TransferWaves(0, 8);
@@ -3159,11 +3163,11 @@ int DRSBoard::ChipTest(int flag)
tc = GetStopCell(0);
GetWave(0, i, waveform, false, tc, 0, false);
for (j=0 ; j<1024; j++)
if (waveform[j] > -350) {
if (waveform[j] > -100) {
if (j<5) {
/* skip this cell */
} else {
printf("Cell error on channel %d, cell %d: %1.1lf mV instead -400mV\n",
printf("Cell error on channel %d, cell %3d: %5.1lf mV instead -400mV\n",
i, (j+tc)%1024, waveform[j]);
cell_error[i][(j+tc)%1024]++;
}
@@ -3175,35 +3179,51 @@ int DRSBoard::ChipTest(int flag)
}
}
FILE *f = fopen("tmp.csv", "w");
/* measure leakage current in all cells */
if (GetFirmwareVersion() < 30000)
printf("Please upgrade firmware to measure leakage current\n");
else {
memset(lc, 0, sizeof(lc));
EnableAcal(1, 0.5);
Sleep(100);
// measure at t=0
SetReadoutDelay(0);
StartDomino();
Sleep(10);
SoftTrigger();
while (IsBusy());
TransferWaves(0, 8);
tc = GetStopCell(0);
for (i=0 ; i<9 ; i++)
GetWave(0, i, wf0[i], false, tc, 0, true);
for (t=1 ; t<150 ; t+=1) {
double delta_t = 0.1;
for (t=0 ; t<150 ; t+=delta_t) {
if (t >= 0.99 && delta_t == 0.1) delta_t = 1;
if (t >= 9.99 && delta_t == 1) delta_t = 10;
SetReadoutDelay(t);
StartDomino();
Sleep(10);
SoftTrigger();
while (IsBusy());
TransferWaves(0, 8);
tc = GetStopCell(0);
for (i=0 ; i<9 ; i++)
GetWave(0, i, wf1[i], false, tc, 0, true);
// average over 10 waveforms
printf(".");
fflush(stdout);
memset(wf1, 0, sizeof(wf1));
for (int r=0 ; r<10 ; r++) {
StartDomino();
Sleep(10);
SoftTrigger();
while (IsBusy());
TransferWaves(0, 8);
tc = GetStopCell(0);
for (i=0 ; i<9 ; i++) {
GetWave(0, i, wft[i], false, tc, 0, true);
for (j=0 ; j<1024 ; j++)
wf1[i][j] += wft[i][j]/10;
}
}
if (t == 0)
memcpy(wf0, wf1, sizeof(wf0));
fprintf(f, "%g\t", t);
fprintf(f, "%lf\t", wf1[0][120]);
fprintf(f, "%lf\t", wf1[0][292]);
fprintf(f, "%lf\t", wf1[0][702]);
fprintf(f, "\r\n");
// check if more than 500 mV lost
if (test_board) {
@@ -3242,10 +3262,6 @@ int DRSBoard::ChipTest(int flag)
}
// calculate statistics over leakage current
double sum = 0, lcmax = 0;
int n = 0, imax, jmax;
int histo[100];
memset(histo, 0, sizeof(histo));
for (i=0 ; i<9 ; i++)
for (j=0 ; j<1024 ; j++)
@@ -3265,7 +3281,7 @@ int DRSBoard::ChipTest(int flag)
jmax = j;
}
}
printf("Leakage current [pA]: %1.1lf average, %1.1lf max [%d/%d]\n", sum/n, lcmax, imax, jmax);
printf("\rLeakage current [pA]: %1.1lf average, %1.1lf max [%d/%d]\n", sum/n, lcmax, imax, jmax);
if (flag) {
printf("Distrubtuion [pA-pA] N:\n");
@@ -3279,13 +3295,17 @@ int DRSBoard::ChipTest(int flag)
}
}
fclose(f);
/* count errors */
for (i=n_error=0 ; i<9 ; i++)
for (j=0 ; j<1024 ; j++)
if (cell_error[i][j])
n_error++;
if (n_error)
if (lcmax > 100)
printf("\n=== Chip has too high leakage current ===\n");
else if (n_error)
printf("\n=== Chip has %d cells with errors ===\n", n_error);
else
printf("\n*** Chip test successfully finished ***\n");