c->hSync = GC.hSync;
c->minVSyncBP = GC.minVSyncBP;
if (GC.k == 0)
- c->k = 0.001;
+ c->k = 0.001;
else
- c->k = GC.k;
+ c->k = GC.k;
c->m = (c->k / 256) * GC.m;
c->c = (GC.c - GC.j) * (c->k / 256) + GC.j;
c->j = GC.j;
vFieldRate = vFreq;
interlace = 0;
if (wantInterlace)
- dotClock *= 2;
+ dotClock *= 2;
/* Determine the lines for margins */
if (wantMargins) {
- topMarginLines = round(c.margin / 100 * vLines);
- botMarginLines = round(c.margin / 100 * vLines);
- }
+ topMarginLines = round(c.margin / 100 * vLines);
+ botMarginLines = round(c.margin / 100 * vLines);
+ }
else {
- topMarginLines = 0;
- botMarginLines = 0;
- }
+ topMarginLines = 0;
+ botMarginLines = 0;
+ }
if (type != GTF_lockPF) {
- if (type == GTF_lockVF) {
- /* Estimate the horizontal period */
- hPeriodEst = ((1/vFieldRate) - (c.minVSyncBP/1000000)) /
- (vLines + (2*topMarginLines) + c.minPorch + interlace) * 1000000;
-
- /* Find the number of lines in vSync + back porch */
- vSyncBP = round(c.minVSyncBP / hPeriodEst);
- }
- else if (type == GTF_lockHF) {
- /* Find the number of lines in vSync + back porch */
- vSyncBP = round((c.minVSyncBP * hFreq) / 1000);
- }
-
- /* Find the number of lines in the V back porch alone */
- vBackPorch = vSyncBP - c.vSyncRqd;
-
- /* Find the total number of lines in the vertical period */
- vTotalLines = vLines + topMarginLines + botMarginLines + vSyncBP
- + interlace + c.minPorch;
-
- if (type == GTF_lockVF) {
- /* Estimate the vertical frequency */
- vFieldRateEst = 1000000 / (hPeriodEst * vTotalLines);
-
- /* Find the actual horizontal period */
- hPeriod = (hPeriodEst * vFieldRateEst) / vFieldRate;
-
- /* Find the actual vertical field frequency */
- vFieldRate = 1000000 / (hPeriod * vTotalLines);
- }
- else if (type == GTF_lockHF) {
- /* Find the actual vertical field frequency */
- vFieldRate = (hFreq / vTotalLines) * 1000;
- }
- }
+ if (type == GTF_lockVF) {
+ /* Estimate the horizontal period */
+ hPeriodEst = ((1/vFieldRate) - (c.minVSyncBP/1000000)) /
+ (vLines + (2*topMarginLines) + c.minPorch + interlace) * 1000000;
+
+ /* Find the number of lines in vSync + back porch */
+ vSyncBP = round(c.minVSyncBP / hPeriodEst);
+ }
+ else if (type == GTF_lockHF) {
+ /* Find the number of lines in vSync + back porch */
+ vSyncBP = round((c.minVSyncBP * hFreq) / 1000);
+ }
+
+ /* Find the number of lines in the V back porch alone */
+ vBackPorch = vSyncBP - c.vSyncRqd;
+
+ /* Find the total number of lines in the vertical period */
+ vTotalLines = vLines + topMarginLines + botMarginLines + vSyncBP
+ + interlace + c.minPorch;
+
+ if (type == GTF_lockVF) {
+ /* Estimate the vertical frequency */
+ vFieldRateEst = 1000000 / (hPeriodEst * vTotalLines);
+
+ /* Find the actual horizontal period */
+ hPeriod = (hPeriodEst * vFieldRateEst) / vFieldRate;
+
+ /* Find the actual vertical field frequency */
+ vFieldRate = 1000000 / (hPeriod * vTotalLines);
+ }
+ else if (type == GTF_lockHF) {
+ /* Find the actual vertical field frequency */
+ vFieldRate = (hFreq / vTotalLines) * 1000;
+ }
+ }
/* Find the number of pixels in the left and right margins */
if (wantMargins) {
- leftMarginPixels = round(hPixels * c.margin) / (100 * c.cellGran);
- rightMarginPixels = round(hPixels * c.margin) / (100 * c.cellGran);
- }
+ leftMarginPixels = round(hPixels * c.margin) / (100 * c.cellGran);
+ rightMarginPixels = round(hPixels * c.margin) / (100 * c.cellGran);
+ }
else {
- leftMarginPixels = 0;
- rightMarginPixels = 0;
- }
+ leftMarginPixels = 0;
+ rightMarginPixels = 0;
+ }
/* Find the total number of active pixels in image + margins */
hTotalActivePixels = hPixels + leftMarginPixels + rightMarginPixels;
if (type == GTF_lockVF) {
- /* Find the ideal blanking duty cycle */
- idealDutyCycle = c.c - ((c.m * hPeriod) / 1000);
- }
+ /* Find the ideal blanking duty cycle */
+ idealDutyCycle = c.c - ((c.m * hPeriod) / 1000);
+ }
else if (type == GTF_lockHF) {
- /* Find the ideal blanking duty cycle */
- idealDutyCycle = c.c - (c.m / hFreq);
- }
+ /* Find the ideal blanking duty cycle */
+ idealDutyCycle = c.c - (c.m / hFreq);
+ }
else if (type == GTF_lockPF) {
- /* Find ideal horizontal period from blanking duty cycle formula */
- idealHPeriod = (((c.c - 100) + (sqrt((pow(100-c.c,2)) +
- (0.4 * c.m * (hTotalActivePixels + rightMarginPixels +
- leftMarginPixels) / dotClock)))) / (2 * c.m)) * 1000;
+ /* Find ideal horizontal period from blanking duty cycle formula */
+ idealHPeriod = (((c.c - 100) + (sqrt((pow(100-c.c,2)) +
+ (0.4 * c.m * (hTotalActivePixels + rightMarginPixels +
+ leftMarginPixels) / dotClock)))) / (2 * c.m)) * 1000;
- /* Find the ideal blanking duty cycle */
- idealDutyCycle = c.c - ((c.m * idealHPeriod) / 1000);
- }
+ /* Find the ideal blanking duty cycle */
+ idealDutyCycle = c.c - ((c.m * idealHPeriod) / 1000);
+ }
/* Find the number of pixels in blanking time */
hBlankPixels = round((hTotalActivePixels * idealDutyCycle) /
- ((100 - idealDutyCycle) * c.cellGran)) * c.cellGran;
+ ((100 - idealDutyCycle) * c.cellGran)) * c.cellGran;
/* Find the total number of pixels */
hTotalPixels = hTotalActivePixels + hBlankPixels;
hSyncBP = hBackPorch + hSyncWidth;
if (type == GTF_lockPF) {
- /* Find the horizontal frequency */
- hFreq = (dotClock / hTotalPixels) * 1000;
+ /* Find the horizontal frequency */
+ hFreq = (dotClock / hTotalPixels) * 1000;
- /* Find the number of lines in vSync + back porch */
- vSyncBP = round((c.minVSyncBP * hFreq) / 1000);
+ /* Find the number of lines in vSync + back porch */
+ vSyncBP = round((c.minVSyncBP * hFreq) / 1000);
- /* Find the number of lines in the V back porch alone */
- vBackPorch = vSyncBP - c.vSyncRqd;
+ /* Find the number of lines in the V back porch alone */
+ vBackPorch = vSyncBP - c.vSyncRqd;
- /* Find the total number of lines in the vertical period */
- vTotalLines = vLines + topMarginLines + botMarginLines + vSyncBP
- + interlace + c.minPorch;
+ /* Find the total number of lines in the vertical period */
+ vTotalLines = vLines + topMarginLines + botMarginLines + vSyncBP
+ + interlace + c.minPorch;
- /* Find the actual vertical field frequency */
- vFieldRate = (hFreq / vTotalLines) * 1000;
- }
+ /* Find the actual vertical field frequency */
+ vFieldRate = (hFreq / vTotalLines) * 1000;
+ }
else {
- if (type == GTF_lockVF) {
- /* Find the horizontal frequency */
- hFreq = 1000 / hPeriod;
- }
- else if (type == GTF_lockHF) {
- /* Find the horizontal frequency */
- hPeriod = 1000 / hFreq;
- }
-
- /* Find the pixel clock frequency */
- dotClock = hTotalPixels / hPeriod;
- }
+ if (type == GTF_lockVF) {
+ /* Find the horizontal frequency */
+ hFreq = 1000 / hPeriod;
+ }
+ else if (type == GTF_lockHF) {
+ /* Find the horizontal frequency */
+ hPeriod = 1000 / hFreq;
+ }
+
+ /* Find the pixel clock frequency */
+ dotClock = hTotalPixels / hPeriod;
+ }
/* Return the computed frequencies */
t->vFreq = vFieldRate;
t->v.vSyncWidth = (int)c.vSyncRqd;
t->v.vBackPorch = (int)vBackPorch;
if (wantInterlace) {
- /* Halve the timings for interlaced modes */
- t->v.vTotal /= 2;
- t->v.vDisp /= 2;
- t->v.vSyncStart /= 2;
- t->v.vSyncEnd /= 2;
- t->v.vFrontPorch /= 2;
- t->v.vSyncWidth /= 2;
- t->v.vBackPorch /= 2;
- t->dotClock /= 2;
- }
+ /* Halve the timings for interlaced modes */
+ t->v.vTotal /= 2;
+ t->v.vDisp /= 2;
+ t->v.vSyncStart /= 2;
+ t->v.vSyncEnd /= 2;
+ t->v.vFrontPorch /= 2;
+ t->v.vSyncWidth /= 2;
+ t->v.vBackPorch /= 2;
+ t->dotClock /= 2;
+ }
/* Mark as GTF timing using the sync polarities */
t->interlace = (wantInterlace) ? 'I' : 'N';
GTF_timings t;
if (argc != 5 && argc != 6) {
- printf("Usage: GTFCALC <xPixels> <yPixels> <freq> [[Hz] [KHz] [MHz]] [I]\n");
- printf("\n");
- printf("where <xPixels> is the horizontal resolution of the mode, <yPixels> is the\n");
- printf("vertical resolution of the mode. The <freq> value will be the frequency to\n");
- printf("drive the calculations, and will be either the vertical frequency (in Hz)\n");
- printf("the horizontal frequency (in KHz) or the dot clock (in MHz). To generate\n");
- printf("timings for an interlaced mode, add 'I' to the end of the command line.\n");
- printf("\n");
- printf("For example to generate timings for 640x480 at 60Hz vertical:\n");
- printf("\n");
- printf(" GTFCALC 640 480 60 Hz\n");
- printf("\n");
- printf("For example to generate timings for 640x480 at 31.5KHz horizontal:\n");
- printf("\n");
- printf(" GTFCALC 640 480 31.5 KHz\n");
- printf("\n");
- printf("For example to generate timings for 640x480 with a 25.175Mhz dot clock:\n");
- printf("\n");
- printf(" GTFCALC 640 480 25.175 MHz\n");
- printf("\n");
- printf("GTFCALC will print a summary of the results found, and dump the CRTC\n");
- printf("values to the UVCONFIG.CRT file in the format used by SciTech Display Doctor.\n");
- exit(1);
- }
+ printf("Usage: GTFCALC <xPixels> <yPixels> <freq> [[Hz] [KHz] [MHz]] [I]\n");
+ printf("\n");
+ printf("where <xPixels> is the horizontal resolution of the mode, <yPixels> is the\n");
+ printf("vertical resolution of the mode. The <freq> value will be the frequency to\n");
+ printf("drive the calculations, and will be either the vertical frequency (in Hz)\n");
+ printf("the horizontal frequency (in KHz) or the dot clock (in MHz). To generate\n");
+ printf("timings for an interlaced mode, add 'I' to the end of the command line.\n");
+ printf("\n");
+ printf("For example to generate timings for 640x480 at 60Hz vertical:\n");
+ printf("\n");
+ printf(" GTFCALC 640 480 60 Hz\n");
+ printf("\n");
+ printf("For example to generate timings for 640x480 at 31.5KHz horizontal:\n");
+ printf("\n");
+ printf(" GTFCALC 640 480 31.5 KHz\n");
+ printf("\n");
+ printf("For example to generate timings for 640x480 with a 25.175Mhz dot clock:\n");
+ printf("\n");
+ printf(" GTFCALC 640 480 25.175 MHz\n");
+ printf("\n");
+ printf("GTFCALC will print a summary of the results found, and dump the CRTC\n");
+ printf("values to the UVCONFIG.CRT file in the format used by SciTech Display Doctor.\n");
+ exit(1);
+ }
/* Get values from command line */
xPixels = atof(argv[1]);
/* Compute the CRTC timings */
if (toupper(argv[4][0]) == 'H')
- GTF_calcTimings(xPixels,yPixels,freq,GTF_lockVF,false,interlace,&t);
+ GTF_calcTimings(xPixels,yPixels,freq,GTF_lockVF,false,interlace,&t);
else if (toupper(argv[4][0]) == 'K')
- GTF_calcTimings(xPixels,yPixels,freq,GTF_lockHF,false,interlace,&t);
+ GTF_calcTimings(xPixels,yPixels,freq,GTF_lockHF,false,interlace,&t);
else if (toupper(argv[4][0]) == 'M')
- GTF_calcTimings(xPixels,yPixels,freq,GTF_lockPF,false,interlace,&t);
+ GTF_calcTimings(xPixels,yPixels,freq,GTF_lockPF,false,interlace,&t);
else {
- printf("Unknown command line!\n");
- exit(1);
- }
+ printf("Unknown command line!\n");
+ exit(1);
+ }
/* Dump summary info to standard output */
printf("CRTC values for %.0fx%.0f @ %.2f %s\n", xPixels, yPixels, freq, argv[4]);
printf("\n");
printf(" hTotal = %-4d vTotal = %-4d\n",
- t.h.hTotal, t.v.vTotal);
+ t.h.hTotal, t.v.vTotal);
printf(" hDisp = %-4d vDisp = %-4d\n",
- t.h.hDisp, t.v.vDisp);
+ t.h.hDisp, t.v.vDisp);
printf(" hSyncStart = %-4d vSyncStart = %-4d\n",
- t.h.hSyncStart, t.v.vSyncStart);
+ t.h.hSyncStart, t.v.vSyncStart);
printf(" hSyncEnd = %-4d vSyncEnd = %-4d\n",
- t.h.hSyncEnd, t.v.vSyncEnd);
+ t.h.hSyncEnd, t.v.vSyncEnd);
printf(" hFrontPorch = %-4d vFrontPorch = %-4d\n",
- t.h.hFrontPorch, t.v.vFrontPorch);
+ t.h.hFrontPorch, t.v.vFrontPorch);
printf(" hSyncWidth = %-4d vSyncWidth = %-4d\n",
- t.h.hSyncWidth, t.v.vSyncWidth);
+ t.h.hSyncWidth, t.v.vSyncWidth);
printf(" hBackPorch = %-4d vBackPorch = %-4d\n",
- t.h.hBackPorch, t.v.vBackPorch);
+ t.h.hBackPorch, t.v.vBackPorch);
printf("\n");
printf(" Interlaced = %s\n", (t.interlace == 'I') ? "Yes" : "No");
printf(" H sync pol = %c\n", t.hSyncPol);
/* Dump to file in format used by SciTech Display Doctor */
if ((f = fopen("UVCONFIG.CRT","w")) != NULL) {
- fprintf(f, "[%.0f %.0f]\n", xPixels, yPixels);
- fprintf(f, "%d %d %d %d '%c' %s\n",
- t.h.hTotal, t.h.hDisp,
- t.h.hSyncStart, t.h.hSyncEnd,
- t.hSyncPol, (t.interlace == 'I') ? "I" : "NI");
- fprintf(f, "%d %d %d %d '%c'\n",
- t.v.vTotal, t.v.vDisp,
- t.v.vSyncStart, t.v.vSyncEnd,
- t.vSyncPol);
- fprintf(f, "%.2f\n", t.dotClock);
- fclose(f);
- }
+ fprintf(f, "[%.0f %.0f]\n", xPixels, yPixels);
+ fprintf(f, "%d %d %d %d '%c' %s\n",
+ t.h.hTotal, t.h.hDisp,
+ t.h.hSyncStart, t.h.hSyncEnd,
+ t.hSyncPol, (t.interlace == 'I') ? "I" : "NI");
+ fprintf(f, "%d %d %d %d '%c'\n",
+ t.v.vTotal, t.v.vDisp,
+ t.v.vSyncStart, t.v.vSyncEnd,
+ t.vSyncPol);
+ fprintf(f, "%.2f\n", t.dotClock);
+ fclose(f);
+ }
}
#endif /* TESTING */
projects / u-boot.git / blobdiff