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/******************************************************************************/
//
// Name: BF533 EZ-KIT video ITU-656 receive mode (8bit) for the Omnivision chip OV6630
//
/*****************************************************************************************************************
(C) Copyright 2003 - Analog Devices, Inc. All rights reserved.
File Name: BF533_EZ-KIT_Omnivision_Config.asm
Date Modified: 08/12/05 TL Rev 1.0
Software: VisualDSP++4.0, Assembler 2.6.7.5, Linker 3.5.2.2
Hardware: BF533 EZ-KIT Board (rev 1.7), Blackfin EZ-Extender (rev 1.2)
Chip: ADSP-BF533 REV 0.4
Special Connections: None
Purpose: To configure the Omnivision devices via I2C
Program Parameters:
************************************************************************************************/
#include <defBF533.h>
/*****************************************************************************************/
// Global and extern subroutines
/*****************************************************************************************/
.global Config_of_Omnivision;
.extern SCCB_Control;
.extern SCCB_Word_Count;
.extern SCCB_DataIn;
.extern SCCB_DataOut;
.extern SCCB_Interface;
.extern SCCB_Read_Count;
.extern SCCB_In_Progress;
/****************************************************************/
// Program Define Section
/****************************************************************/
#define rd_cmd 0x1 // sccb interface read command
#define wr_cmd 0x2 // sccb inteface write command
#define Omnivision_WR 0xC0 // Device address to write to the chip
#define Omnivision_RD 0xC1 // Device address to read from the chip
#define dummy_addr 0x14 // dummy read to check the ACK
#define Omni_COMB 0x13 // Register address to change output format
#define Omni_8bit_Mode 0x21
#define Omni_8bit_Mode_ITU 0x31
#define Omni_16bit_Mode_ITU 0x11
#define Omni_16bit_Mode 0x01
#define dummy 0x0
/*************** SCCB Start Settings**************************************/
/*Before Calling the SCCB_Interface the inputs to the SCCB_Taskmanager */
/*must be done. */
/* Write to the "SCCB_Control" a "1" for reading from the Device or */
/* a "2" for writing to the Device. */
/* */
/* Leave the number of bytes totaly in "SCCB_Wordcount". Device Addresses*/
/* and Word Addresses included. */
/* */
/* Write all data to the "SCCB_DataIn". */
/* e.g.Writing to the device: */
/* */
/* SCCB_DataIn Device Address (LSB must be Zero) */
/* Word Address */
/* Data 1 */
/* . */
/* . */
/*************************************************************************/
/* (e.g.Reading from the device: */
/* SCCB_DataIn Device Address (LSB must be zero) */
/* Word Address */
/* Device Address (LSB must be one) */
/* Data can be read via SCCB_DataOut */
/*************************************************************************/
/* See below !!!!!! */
/*************************************************************************/
/*****************************************************************************************/
// Program
/*****************************************************************************************/
.section L1_code;
// configure the Omnivision device via I2C
Config_of_Omnivision:
p0.l = SCCB_DataIn;
p0.h = SCCB_DataIn;
r0 = Omnivision_WR (z); //Device select
[p0++] = r0;
r0 = Omni_COMB (z); //Device Subregister select
[p0++] = r0;
r0 = Omni_8bit_Mode_ITU (z); //Data to transfer in the register
[p0++] = r0;
p0.l = SCCB_Word_Count;
p0.h = SCCB_Word_Count;
r0 = 3 (z); // Number of transfers in total
[p0] = r0;
p0.l = SCCB_Control;
p0.h = SCCB_Control;
r0 = wr_cmd (z); //controls whether to read or to write
[p0] = r0;
p0.h = SCCB_In_Progress; //takes care that the next transfer will not start
p0.l = SCCB_In_Progress; //before the last one ends
r0 = 1;
[p0] = r0;
Config_of_Omnivision.END:
RTS;
/************************************************************************************/
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