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Discussion Groups | TMS320C6x | 8khz sampling with SPI(McBSP) and dma

Technical discussions about the TI C6000 DSPs (including the c62x, c64x and c67x DSPs).

  

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8khz sampling with SPI(McBSP) and dma - ahmadagha23 - Jul 25 8:13:47 2008



Hi,
1-As I know in SPI mode there is not the feature to program FPER in 
McBSP. I want to read 16-bit samples every 125us in SPI mode. (it is 
compulsory). I want to use DMA and not add any checking or time 
consuming code to my project.
2- If my cpu internal clk is 120 MHz and the CLKGDV field of my SRGR is 
8 bits, how can I use mcbsp(in SPI mode) with internal clk source and 
with 100KHz clk(r/x) frequency? It seems that the minimum achievable 
clk frequency is (120/(2*255))=235KHz. 
Regards

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