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by andrea.varesio
Sun May 12, 2019 8:53 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SMI - CS signal?
Replies: 2
Views: 629

Re: SMI - CS signal?

can anyone provide SMI (secondary mamory interface) hardware specification? I trying to do something similar
by andrea.varesio
Sun May 12, 2019 8:46 pm
Forum: Compute Module
Topic: High bandwidth interface to FPGA?
Replies: 19
Views: 3996

Re: High bandwidth interface to FPGA?

can anyone provide SMI (secondary mamory interface) hardware specification?
by andrea.varesio
Sat May 11, 2019 5:49 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Reading 8bit synchronous data @ 30MHz - interface RPI3 with camera sensonr OV2640
Replies: 3
Views: 539

Reading 8bit synchronous data @ 30MHz - interface RPI3 with camera sensonr OV2640

Hi I am trying to understand whether it is feasable to interface PI with camera sensor OV2640. This sensor has an outpu digital video port providing 8/10 bit synchronous with Pixel clock running @ 30MHz. Reading data at such speed cannot be done in user space. I am wondering whether the SMI (seconda...
by andrea.varesio
Thu May 30, 2013 6:06 am
Forum: C/C++
Topic: memory allocation breaks frame buffer ioctl?
Replies: 1
Views: 802

Re: memory allocation breaks frame buffer ioctl?

I am self responding thanks to a solution arrived from a different channel.

Every structure used in ioctl HAS TO BE MEMSET to 0!
by andrea.varesio
Wed May 29, 2013 11:17 am
Forum: C/C++
Topic: memory allocation breaks frame buffer ioctl?
Replies: 1
Views: 802

memory allocation breaks frame buffer ioctl?

Hi I am new in raspberry PI. I am trying to use frame buffer. I configured frame buffer editing /boot/config.txt framebuffer_depth=32 framebuffer_ignore_alpha=1 When I try to open the device and perform a FBIOPUT_VSCREENINFO ioctl I have an issue related to memory allocation. If I try to allocate me...

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