Part Number: AM5728
Customer has problem on using AM5726 SPI4. the returned read data is always wrong, the wave shows data is right from external sensor, but wrong in SPI module.
Send out read ID command, sensor returned the right ID value 0x12, but in SPI_rx register it is 0x0186.
Customer has verified I2C, CAN, UART, UART, SPI1, SPI2, QSPI on the AM5726 board made by themselves. but SPI4 has the issue.
As either GPEVM nor IDK did not connect device on SPI4, I don't know how to verify. Please help.
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In reply to Yordan Kovachev:
customer is using: processor_sdk_rtos_am57xx_5_01_00_11
They tested on both ARM side with Linux and DSP side with PDK RTOS example, both have the same issue.
In reply to Tony Tang:
The register setting in the picture, did you see any wrong according to the timing wave form?
Figured out the issue due to a 22pf capacitor in the data line. remove it, data is right. but can't explain as scoped on both side of the resistor, same wave form, why different result.
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