(rearranging mail to avoid top posting..) From: matthias schwarz [mailto:matthias.schw@xxxxxxxxxxxxxx] > 2009/7/27 Aguirre Rodriguez, Sergio Alberto <saaguirre@xxxxxx>: > > > > > >> -----Original Message----- > >> From: linux-omap-owner@xxxxxxxxxxxxxxx [mailto:linux-omap- > >> owner@xxxxxxxxxxxxxxx] On Behalf Of matthias schwarz > >> Sent: Monday, July 27, 2009 7:47 AM > >> To: linux-omap@xxxxxxxxxxxxxxx > >> Subject: Camera Interface VS/HS Issue > >> > >> Hi there, > >> > >> i just recently ran into a problem when trying to let the ISP > >> (OMAP3530) generate HS/VS signals in SYNC mode. > >> I am building a module to do so. > >> > >> It basically enables the three clocks (cam_ick, cam_mclk and > >> csi2_96m_fck), > >> then sets > >> > >> ISPCCDC_PIX_LINES_PPLN > >> ISPCCDC_PIX_LINES_HLPRF > >> ISPCCDC_HD_VD_WID_VDW > >> ISPCCDC_HD_VD_WID_HDW > >> ISPCCDC_SYN_MODE_VDHDEN > >> ISPCCDC_SYN_MODE_VDHDOUT > >> ISPCCDC_CFG_VDLC > >> ISPTCTRL_CTRL_DIVA > >> ISPTCTRL_CTRL_DIVB > >> ISPCCDC_PCR > >> > >> via some calls to ioremap and ioread32/iowrite32. > >> My question now is the following: > >> when i hook an oscilloscope to the corresponding pins (CAM_VS, CAM_HS, > >> CAM_XCLKA) i can see that only the CAM_XCLKA is working correctly, > >> also at the configured frequency. > >> Both, CAM_VS and CAM_HS remain at low voltage all the time, even when > >> i switch their polarities (ISPCCDC_SYN_MODE_VDPOL, > >> ISPCCDC_SYN_MODE_HDPOL) that behavior does not change and signals > >> always remain at low voltage. > >> > >> Could someone help me out, or give me a hint what i might be missing > >> to generate those output signals correctly? > > > > Matthias, > > > > Can you please provide a register dump of the above values? > > > > Looks like you're touching the adequate registers though... But I can > help you more looking at the values. > > > Sure i can, > register values are the following: > > ccdc_pix_lines: 0x050005a0 > > ccdc_hd_vd_wid: 0x00320064 > > ccdc_syn_mode: 0x00050c0c This is wrong, because: Bit0 sets directions of cam_hs and cam_vs signals with this values: - 0: Input (what you're setting with that values) - 1: Output (Is this what you want?) Bit1 Sets direction of cam_fld pin, which follows the same logic as the Bit0. Others could be wrong or bad, depending on your exact usecase and config intention. Hope this helps. Regards, Sergio > > ccdc_cfg: 0x00008000 > > tctrl_ctrl_cfg: 0x80000463 > > ccdc_pcr: 0x00000001 > > Thank you, > Matthias > > Regards, > > Sergio > >> > >> Thank you very much, > >> Matthias > >> -- > >> To unsubscribe from this list: send the line "unsubscribe linux-omap" > in > >> the body of a message to majordomo@xxxxxxxxxxxxxxx > >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
