This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Part Number: LAUNCHXL-CC1310
I connect cc1310 launchpad to 128x128, General 1.5inch OLED display Module through SPI, and on MOSI line i see following:
What's wrong with this SPI ?
Where are you probing MOSI line, closer to the output or input? I recommend you probe around the input and ground your probe to a ground near the input pin.
Have you tried adding a 20~50 ohm resistor in series? This helps to slow down the rising/falling edges.
What frequency are you using? Have you tried slowing down the bit rate?
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Seong Kim:
>>Where are you probing MOSI line, closer to the output or input?
Closed the output. Without connecting to display, MOSI have a fine level . And CLK have a fine signal level with this ground . Ground was both to CLK and MOSI.
>>Have you tried adding a 20~50 ohm resistor in series? This helps to slow down the rising/falling edges.
No , I will try to add.
>>What frequency are you using? Have you tried slowing down the bit rate?
frequency 1MHz . I tried to reduce the frequency, but it did not help.
The resistor did not help
In reply to Alex Shestakov:
i did the following :
1. сс1310 spi :
oledSpiParams.transferMode = SPI_MODE_BLOCKING;
oledSpiParams.transferTimeout = SPI_WAIT_FOREVER;
oledSpiParams.transferCallbackFxn = NULL;
oledSpiParams.mode = SPI_MASTER;
oledSpiParams.bitRate = 1000000;
oledSpiParams.dataSize = 8;
oledSpiParams.frameFormat = SPI_POL0_PHA0;
2. For channel MOSI i set in series 74HC126D .
And the display has earned.
Glad you got it working! What was different about your SPI parameter settings before?
oledSpiParams.frameFormat = SPI_POL1_PHA0;
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.