Omnivision OV7640 SCCB (I2C?) bus problem
I am hoping someone can assist me with the SCCB (I2C?) bus of an
Omnivision OV7640 image sensor.
I am unable to get the OV7640 to respond to commands on the SCCB bus.
I have connected the OV7640 to a SRAM, and feed VSYNC and HREF to an
Altera 7032S CPLD which controls and address counter and the SRAM. I
can successfully capture an image frame, and transfer it (slowly) over
RS232 to a PC.
If I treat each pixel as a luminance value, I get a good monochrome
photograph, 640 x 480.
I find this surprising, since I was expecting bayer encoded data.
Looking at (on the data...I2C
i am working with philips microcontroller LPC935 which is to be
attached to I2C port expander.
i have to write a code for this .As my device is configured as master
receiver to read (i have to read only) the value or status of port
my question is that : Do i need to check for all 25 states of I2C bus
from status register for my operation ?
> i am working with philips microcontroller LPC935 which is to be
> attached to I2C port expander.
> i have to write a code for this .As my device is configured as master
> receiver to read (i have to read onl...I2C high speed mode and I2C range extending
Hi - are there any microcontrollers out there that support I2C high
speed mode? (3.4Mbps - defined in the I=B2C-bus specification, Version
2=2E0). I can't find any that do. I can't even find any NXP parts that
Also - has anybody ever used an I2C bus extender chip? (ie the NXP
P82B715). What was your experience with it? Are there any that can
handle higher speeds that that one? (1Mbps+)
> Hi - are there any microcontrollers out there that support I2C high
> speed mode? (3.4Mbps - defined in the I�C-bus specification, Version
> 2.0). I ca...Devantech USB-I2C R286-USB-I2C board
I bought the Devantech USB-I2C R286-USB-I2C board. The Devantech USB-
I2C module is a low cost USB to I2C module, with a simple command set,
and interfacing to any I2C device. I'm trying to set the I2C interface
between my I2C board and R286-USB-I2C?
Also I do need a help in User Interface development for Microsoft
Windows. It should be similar to your USB_I2C_SRF08.exe software but
Thanks in advanced for any help,
I am trying to read a byte from a particular address in I2C EEPROM.
But the data I get is from a different location. For example, if try
to read data from "x05" location, the byte from "x0B" location is
read. If try to read data from "x06" location, data from "x0D" is
read. If I try to read data from "x07", data from "x0F" is read. If
you notice above situation, a fixed pattern is followed.
I am using a I2C Master Core controller to read data from I2C EEPROM.
Xilinx Post route simulation works fine but when I try to configure
th...having problems with i2c
hello you all
i've been working on an i2c communication among a unique master and
several slaves (all of them pic16f877) but a problem arose when trying
to send data from slaves to the master:
when working with a slave as transmitter, after setting sspcon2.RCEN,
the SDA line is supposed to get the value of the most significant bit
contained in SSPBUF and then shifting out the next bits with the
falling edges of the SCL line (so that the second bit of the byte to
be transmitted is shifted out with the falling edge of the first
clock pulse, the third bit with the second falling edge... ...I2C Controller
i need vhdl source code for I2C Controller urgently...plz help me
regarding this..MY email ID is firstname.lastname@example.org
pavan kumar ha scritto:
> i need vhdl source code for I2C Controller urgently...plz help me
> regarding this..MY email ID is email@example.com
i think there is an i2c controller on opencores.org
You can also post there if your professor is happy with that...
I'm developing an I2C slave device based on a MSP430F169.
Another 'F169 is the master (for testing) and every now and then, the
communication breaks down.
The master's application is derived from TI app note slaa208
"Interfacing an EEPROM to the MSP430 I2C Module".
I'm implementing a I2C bootloader for the slave device, and the
control flow goes like this:
1a) Master does "ack-polling" to see if the slave is there.
(It puts a start-condition on the bus, followed by the slave address,
followed by a stop condition, until it sees ACK from the slave)
hallo all ,
i am a beginner in vhdl , i need help .
i just want to ask with VHDL code wether the i2c Bus is free.
bus is free when a stop condition is sent und known start condition is sent
this is a start condition
this is a stop condition
please help me .
I think what you are asking for is a falling edge detector and a rising
SIGNAL sda1, sda2, falling_edge, rising_edge : std_logic;
WAIT until clk=...