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TMS320F28P650DK: How do I use DSP peripherals to implement the A-format communication protocol?

Lin Haonan
Prodigy 180 points

Part Number: TMS320F28P650DK

Tool/software:

Hi engineers,

Recently, I need to implement a communication protocol, A - format, which is quite similar to t - format. However, I've found that it seems impossible to complete this task only by using DSP peripherals. The frame format of A - format communication is as follows: each frame consists of 18 bits, and the required communication rates are 2.5Mbps / 4Mbps / 6.67Mbps / 8Mbps / 16Mbps.

If we use SPI, the maximum data bit - width of SPI is 16 bits, so it can't meet the requirement. If we use SCI, with the system clock being 150M CLK, it's impossible to achieve the division frequency to meet the communication rates.

Is there any way, and preferably a convenient way, to implement the A - format communication? I've also learned about CLB recently. I'm wondering if it's possible to achieve this by combining with CLB.

Regards,

Lin Haonan