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Hi ALL,
I tried to drive OLED display (i2c interface) with CYW920819EVB-02 kit. The result is, only the half of screen works.. https://www.instagram.com/p/Bz5xHbzH6no/
It was working code nothing wrong in cmds or anything, then i tried the same code with PSoC4 and its works well.. https://www.instagram.com/p/Bz-ALrBHbLh/
In both case i used 100k baud-rate.
CYW920819EVB-02 -> Pins-> scl_pin = WICED_P27 .sda_pin = WICED_P32
i changed the pins also but stil the result is same. so something goes wrong with wiced_hal_i2c_write( but always it returns SUCCESS.
Please let me know, what could be the difference between PSoC4 I2C & WICED I2C.
Thanks
Ashok r
Solved! Go to Solution.
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Hi Ashok,
I checked internally and confirmed that this is a limitation.
HW buffer is 64 bytes. In that slave address is 1 byte. So maximum payload is 63 bytes.
Thanks,
Anjana
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Hi Ashok,
Not sure what is the issue. Can you please share your WICED application to have a look into code?
Thanks,
Anjana
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Hi AnjanaM_61 DheerajP_41 MichaelF_56
Can anyone respond please, running out of time...
Thanks
Ashok r
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Hi All, AnjanaM_61 DheerajP_41
I solved this issue temporarily from my application end. but WICED i2C has issue !
Thanks
Ashok r
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Hi Ashok,
Please be assured that we are checking on issue with I2C side.
Meanwhile it will be great if you can share the fix which you are using.
Thanks,
Anjana
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Hi Anjana,
Seems like, the i2c payload is limited by 64bytes, if i send more then 64
bytes , the i2c sends zero after 64th byte.
Thanks
Ashok r
On Mon, 29 Jul 2019 at 12:08, AnjanaM_61 <community-manager@cypress.com>
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Hi Ashok,
I checked internally and confirmed that this is a limitation.
HW buffer is 64 bytes. In that slave address is 1 byte. So maximum payload is 63 bytes.
Thanks,
Anjana