SPI hangs when changing buadrate dynamicaly.

pramodk_g_ — Thu, 17 Jul 2014 19:15:20 GMT

Hi all,

I am working on a TWRK70F120M board with MQX 4.0.1. My device is switching between different modes where core frequency is switching between 24Mhz and 120Mhz(For reducing current conception). Also I have one spi driven LCD in my hardware and SPI2 is used for that. When I am switching the core frequency i am also changing the spi buad rate using ioctl command. But my issue is that that task hangs after that . Please let me know your valuable thoughts.

Thanks,

Pramod.

Re: SPI hangs when changing buadrate dynamicaly.

RadekS — Wed, 23 Jul 2014 12:21:19 GMT

It isn’t known issue.

Changing core frequency presents always some dangerous, especially with external communication.

Are you sure that you didn’t change baud rate somewhere in middle of transfer (chip select active)?

Could you please more specify where code hangs?

I suppose that you set SPI2 as master, correct?

Have a great day,
RadekS

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topic SPI hangs when changing buadrate dynamicaly. in MQX Software Solutions

SPI hangs when changing buadrate dynamicaly.

Re: SPI hangs when changing buadrate dynamicaly.