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RZA1 RSK USB Host Bandwidth Issue
I am attempting to capture Visible Light images using a USB Webcam that operates with USB Bulk Mode type transfers. The Frame is a 640x480 YUYV frame at 614400 bytes.This webcam and the same sequence...
View ArticleRE: Hardware design query for using LVDS port of RZ/A1 MPU
Are SPDT switches or other high speed switches advisable? Is there any way to achieve this multiplexing of LVDS port pin and UART port also??
View ArticleRE: Hardware design query for using LVDS port of RZ/A1 MPU
Are SPDT switches or other high speed switches advisable? Is there any way to achieve this multiplexing of LVDS port pin and UART port also??
View ArticleHardware design query for using LVDS port of RZ/A1 MPU
I want to use LVDS port for interfacing tft LCD.But the point is in LVDS port, there is one "FCE" pin (control pin for NAND flash) multiplexed with same port.If I want to use this pin for both the...
View ArticleRE: RZA1 RSK USB Host Bandwidth Issue
You are using "--save webcam.yuyv", but what are you saving the data to? SD Card? RAM (/tmp)?It looks like for your experiment that you are only capturing 1 frame ( delay 1 second, skip the next 2...
View ArticleRE: RZA1 RSK USB Host Bandwidth Issue
Hi Chris,The goal really is to capture images at a rate of roughly one per minute. I am not concerned with streaming images - I only want to guarantee that when I request and image over USB, it returns...
View ArticleRE: RZA1 RSK USB Host Bandwidth Issue
I think 1 image per minute is a very reasonable expectation, even without DMA.Saving to /tmp is also the best (fastest) way to go.> I would like to try the kernel jiffies timer experiment. How might...
View ArticleRE: Can't get I2C to work
Hi nils,I have following doubts regarding your setup,1. Have you checked whether the SCL/SDA line of channel 1 is pulled down to low by the device connected (The SCL/SDA line should be high after the...
View ArticleRE: RZA1 RSK USB Host Bandwidth Issue
As an experiment, try this and see what happens.In your kernel config, try this:Make sure you high resolution timer is enabledCONFIG_CLKSRC_SH_OSTM=yCONFIG_HIGH_RES_TIMERS=ySet you "Timer tick...
View ArticleRE: Can't get I2C to work
Hi Gopish,I have connected an MCP4631 digital potentiometer with both SCL and SDA lines pulled up with 4k7 resistors. The SCL and SDA lines are initially high and the SDA line is pulled low after...
View ArticleRE: Can't get I2C to work
Hi Gopish,I have connected an MCP4631 digital potentiometer with both SCL and SDA lines pulled up with 4k7 resistors. The SCL and SDA lines are initially high and the SDA line is pulled low after...
View ArticleRE: Can't get I2C to work
Hi Nils,BRL and BRH are for setting duty cycle of SCL (width of low level and high level respectively), this value along with the cks value will determine your IIC data transfer rate, you can find the...
View ArticleRE: Can't get I2C to work
Hi Gophish,Thank you for your explanation. I didn't wrote 1's to bits 5-7 of BRL and BRH so thank you for that, although it didn't fix the problem. The problem was that the Port Bidirectional Control...
View ArticleRE: LVDS port and NAND flash port Multiplexing in RZ/A1 H
Hello,unfortunately as you said, this pin cannot be used for both functions simultaneously, and there is no other multiplexing alternativeThese two functions are available on P5-5 only, even on the...
View ArticleLVDS port and NAND flash port Multiplexing in RZ/A1 H
In RZ/A1M MPU, port number P5_5 pin is demultiplexed with following alternative options:- P5_5 Alternative 1: TXOUT1M P5_5 Alternative 2: LCD1_DATA5P5_5 Alternative 3: LCD0_DATA21P5_5 Alternative 4:...
View ArticleRE: RZA1 RSK USB Host Bandwidth Issue
Hi Chris - thank you for the suggestions. I have tried both the high resolution timer and also the buf size define in the kernel driver. Unfortunately, I see the same garbled image when I capture.I...
View ArticleRE: RZA1 RSK USB Host Bandwidth Issue
There are 2 drivers upstream: drivers/usb/host/r8a66597-hcd.c and drivers/usb/renesas_usbhs/. As you mentioned, r8a66597-hcd.c is not much different than what is in the current Linux-3.14 BSP (except...
View ArticleRE: Ethernet Issues on RSK RZA1H:
HiI think the ISR (interrupt service routine) of this driver (sh - eth.c) has returned IRQ_NONE instead of IRQ_HANDLED for interrupts with errors.> sh-eth r7s72100-ether eth0: Receive Descriptor...
View ArticleRE: Ethernet Issues on RSK RZA1H:
If you look in file drivers/net/ethernet/renesas/sh_eth.c, you will find function "sh_eth_interrupt".The driver should only return "IRQ_NONE" if the driver thinks an interrupt has occurred that was not...
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