Clk0 of aptina's external clock

vithurson_subasharan · June 12, 2020, 4:48am

Hi,
I need to know where the frequency of clk0 which is supplied to aptina camera sensor’s external clock is controlled in the pixy firmware.

Thanks.

edge · June 12, 2020, 8:27pm

Hello,
I’m told that it is generated on the NXP processor by one of the PLLs. Look at clockInit() in platform_config.c:

github.com

charmedlabs/pixy2/blob/master/src/device/libpixy_m4/src/platform_config.c

//
// begin license header
//
// This file is part of Pixy CMUcam5 or "Pixy" for short
//
// All Pixy source code is provided under the terms of the
// GNU General Public License v2 (http://www.gnu.org/licenses/gpl-2.0.html).
// Those wishing to use Pixy source code, software and/or
// technologies under different licensing terms should contact us at
// [email protected]. Such licensing terms are available for
// all portions of the Pixy codebase presented here.
//
// end license header
//

#include "lpc43xx.h"
#include "platform_config.h"

#include "lpc43xx_scu.h"
#include "lpc43xx_cgu.h"

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Edward