IPIPE Histogram is not working

Lajos Rancz

Hi all,

I would like to use the IPIPE's histogram module, but I cannot get any data from it (all memory is filled by 0). My configuration:

IPIPE.HST_SEL[2] = 0; // Input == noise filter
IPIPE.HST_SEL[1:0] = 2; // Bayern G = (Gr+Gb)/2
IPIPE.HST_PARA[13:12] = 3; // 256 bin
IPIPE.HST_PARA[3:0] = 1; // Region 0 enabled
IPIPE.HST_0_VPS = 2;
IPIPE.HST_0_HPS = 0;
IPIPE.HST_0_VSZ = 1080-4; // Vertical size
IPIPE.HST_0_HSZ = 1920-2; // Horizontal size
IPIPE.HST_PARA[7:4] = 0x0f; // R,G,B,Y enabled,
IPIPE.HST_PARA[11:8] = 4; // SHF == 4, ISS kodbol
IPIPE.HST_TBL[1] = 1; // Histogram clear
IPIPE.HST_TBL[0] = 0; // Table 0 and 1
IPIPE.HST_MUL_R = 6;
IPIPE.HST_MUL_GR = 6;
IPIPE.HST_MUL_GB = 6;
IPIPE.HST_MUL_B = 6;
IPIPE.HST_MODE[0] = 0; // Free run mode
IPIPE.HST_EN[0] = 1; // start!

The IRQ routine is called synchronously with RSZ and other interrupts, but all the IPIPE_HIST_MEM0 and IPIPE_HIST_MEM1 are filled with zeros. What's wrong?

Regards,
Lajos

over 12 years ago

0 Lajos Rancz over 12 years ago

Expert 1065 points

From the ISS documentation (SPRUH30B):

"IPIPE has four different processing paths:

• Case 1: IPIPE reads BAYER RAW data and applies all IPIPE functions and stores the YCbCr (or RGB)
data to SDRAM.
...
• Case 4: IPIPE reads YCbCr-4:2:0 data and applies resize to output YCbCr data to SDRAM."

But in the detailed part, the histogram initialization is mentioned only in Case 4 configuration: "Configure IPIEE (sic!) histogram.". So, what's the truth? Is it possible to use the histogram module in Case 1?

Regards,
Lajos

0 Lajos Rancz over 12 years ago in reply to Lajos Rancz

Expert 1065 points

Additional information: I've checked the boxcar module functionality (simultaneously with histogram) and the boxcar is working! So, what is the mistake?

0 Lajos Rancz over 12 years ago in reply to Lajos Rancz

Expert 1065 points

Plus info: the IPIPE_SRC_STA[4] (Histogram status) is constantly zero.

0 Lajos Rancz over 12 years ago in reply to Lajos Rancz

Expert 1065 points

Any idea?

0 Rajat Sagar over 12 years ago in reply to Lajos Rancz

TI__Expert 8780 points

Hi Lajos,

Please confirm the software release version used by you? The histogram should work in case 1 as well.

In parallel I'll check more and try to send you a dump of the histogram settings.

Regards

Rajat

0 Lajos Rancz over 12 years ago in reply to Rajat Sagar

Expert 1065 points

Hi Rajat,

What is meant by software release verison? We don't use the ISS sw or the IPNC RDK, we have implemented an own architecture.

Regards,
Lajos

0 Rajat Sagar over 12 years ago in reply to Lajos Rancz

TI__Expert 8780 points

Lajos,

I thought you were working on standard IPNC RDK releases and ISS driver release. We have histogram working on the said release software.

Will it help if I send you the complete register log from a working setup, so that you can compare the registers at your end?

Regards

Rajat

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IPIPE Histogram is not working