what version kernel are you using. 4.9 had logging turned on and it made
a lot of noise
On 3/28/2018 5:56 AM, joerg.kr...@ims.fraunhofer.de wrote:
> Hi,
> I'm trying to use the spi device on my beaglebone black with a C program.
> For setup I use something like:
>
> |
> uint8_t SPImode|=SPI_CPOL;
> uint8_t bits = 8;
> uint16_t delay = 0;
> uint32_t speed = 500000;
> fd =open("spidev1.0",O_RDWR);
> ret =ioctl(fd,SPI_IOC_WR_MODE,&SPImode);
>
> ret =ioctl(fd,SPI_IOC_RD_MODE,&SPImode);
>
> ret =ioctl(fd,SPI_IOC_WR_BITS_PER_WORD,&bits);
>
> ret =ioctl(fd,SPI_IOC_RD_BITS_PER_WORD,&bits);
>
> ret =ioctl(fd,SPI_IOC_WR_MAX_SPEED_HZ,&speed);
>
> ret =ioctl(fd,SPI_IOC_RD_MAX_SPEED_HZ,&speed);
> |
>
> For transfer I use something like:
>
> |
> structspi_ioc_transfer tr ={
> .tx_buf =(unsignedlong)dataWrite,
> .rx_buf =(unsignedlong)dataRead,
> .len =len,
> .delay_usecs = 0,
> .speed_hz = 500000,
> .bits_per_word = 8,
> };
>
> ret =ioctl(fd,SPI_IOC_MESSAGE(1),&tr);
> |
>
> Unfortunately my log files (syslog, kern.log, debug) gets flooded with
> SPI messages:
>
> Mar 28 14:25:28 bbbi-ohl-1 kernel: [ 9846.393284] spidev spi1.0:
> setup: speed 500000, sample trailing edge, clk normal
> Mar 28 14:25:28 bbbi-ohl-1 kernel: [ 9846.393337] spidev spi1.0:
> setup: speed 16000000, sample trailing edge, clk normal
> Mar 28 14:25:28 bbbi-ohl-1 kernel: [ 9846.393440] spidev spi1.0:
> setup: speed 500000, sample trailing edge, clk normal
> Mar 28 14:25:28 bbbi-ohl-1 kernel: [ 9846.393492] spidev spi1.0:
> setup: speed 16000000, sample trailing edge, clk normal
> Mar 28 14:25:28 bbbi-ohl-1 kernel: [ 9846.394007] spidev spi1.0:
> setup: speed 500000, sample trailing edge, clk normal
> Mar 28 14:25:28 bbbi-ohl-1 kernel: [ 9846.394062] spidev spi1.0:
> setup: speed 16000000, sample trailing edge, clk normal
>
> Looks like somebody tries to reset the SPI clock to the maximum of 16 MHz?
> And the SPI driver logs everthing in each log file.
> Somebody knows a solution for this?
> Because my flash gets filled in just a few seconds :-(
>
>
>
> --
> For more options, visit http://beagleboard.org/discuss
> ---
> You received this message because you are subscribed to the Google
> Groups "BeagleBoard" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to beagleboard+unsubscr...@googlegroups.com
> <mailto:beagleboard+unsubscr...@googlegroups.com>.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/beagleboard/5f22720b-4050-4395-9d1e-74ea193a97e5%40googlegroups.com
> <https://groups.google.com/d/msgid/beagleboard/5f22720b-4050-4395-9d1e-74ea193a97e5%40googlegroups.com?utm_medium=email&utm_source=footer>.
> For more options, visit https://groups.google.com/d/optout.
--
For more options, visit http://beagleboard.org/discuss
---
You received this message because you are subscribed to the Google Groups
"BeagleBoard" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to beagleboard+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/beagleboard/6fc8a5f5-d3e6-3a67-a0fe-65c1c179bca1%40gmail.com.
For more options, visit https://groups.google.com/d/optout.
