SPI CLK

Hi Ram,

Ans2: SPI chipselect and parameter table index are not update in data manual. Please refer below thread

http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/p/283454/1055456.aspx#1055456

Refer below thread for converting .out file to .bin format

http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/p/354771/1253899.aspx#1253899

Thanks,

Hello Ram,

The minimum SPI clock cycle time is specified in the device datasheet as 3*P2 (P2 = 1/SYSCLK7). So the maximum rating of SPI clock is SYSCLK7/3.

The SPI clock is derived from SYSCLK7 and it is prescaled by the value given in the SPIFMT.PRESCALE register. You cannot get the SYSCLK7 as it is for SPI clock.

Please refer section 3.13 SPI Data Format Registers (SPIFMTn) in the SPI user guide given below.

http://www.ti.com/lit/ug/sprugp2a/sprugp2a.pdf

Regards,

Senthil

Hi Senthil,

Thanks for the quick response. i formulate like this.

My RefClk is of 312.5 MHz. and SYSCLk7= RefCLK/6 = 312.5/6 = 52.08 MHz = SPI Module CLk 

as i understood SYSCLk7 = SPI Module CLK

Finally SPI CLK =SPI Module CLK/(PRESCALE+1)

How much PRESCALE value i have to take?you specified that maximum SYSCLK7/3, i.e PRESCALE =2,

because my RefCLK/6 = 52.08 =SPI Module CLk 

so SPICLK  = ?

YOU:The minimum SPI clock cycle time is specified in the device datasheet as 3*P2 (P2 = 1/SYSCLK7). So the maximum rating of SPI clock is SYSCLK7/3.

SPEC:15-8 PRESCALE SPI prescaler (value = 0-FFh). It determines the bit transfer rate if the SPI is the network master and is directly derived 

from the SPI module clock. If the SPI is configured as slave, PRESCALE does not need to be configured.
The clock rate can be calculated as:
SPI clock frequency = SPI module clock/(PRESCALE + 1)
Note: When PRESCALEx is cleared to 0, the SPI clock rate defaults to SPI module clock/2.

Thanks,

Ram.

Hi,

Thanks for your quick response. chip select is fine i will look into the Hw Manual. 

i am not clear regarding boot parameter table index,  my setup is like this i have in.out file i already converted to  out.bin file based on strip6x.exe. so i don't understand what is this boot param table or very importantly the parameter table index because i have to give this index in the SPI device configuration bit field. i have only one .bin file with me. what i have to enter now.

Thanks,

Ram.

Hi Senthil,

Thanks for your answer. but one more question. how to set this prescale value in SPIFMTn. who has to set this value?

Please refer section 3.13 SPI Data Format Registers (SPIFMTn) in the SPI user guide given below.

thanks,

Ram.

Hi,

The MCSDK has the tiboot.h under \mcsdk_2_01_02_05\tools\boot_loader\ibl\src\device. This has all the boot parameter table for all the boot modes for different devices.

Thanks,

Hi Ganapathi,

can you please tell me exactly which file specifies the boo parameter  table. 

i am explaining again my status: i have one .out file generated with CCSv5.5 which contains all the pll configuration ,PCIe express configuration and DDR3 configuration.i am using JTAG to load this .out file into the DSP and DSP is booted and works fine. i want to send this .out file through the spi boot mode protocol. so first i converted this .out file into .bin file (the methodology given by you) and i want to write this .bin file into the FPGA, from where it goes to DSP by spi link. 

if  my .bin file is boot parameter table(i am not sure). then what is the parameter table index?

or if not, do i have to prepare any other boot  parameter table to load to DSP via spi as a primary bootloader.

and secondary bootloader in this case loads my application .bin, as i don't have any secondary boot loader or any 

NOR flash, i have only one .bin file and My FPGA from where i can load this .bin file to the DSP.

Please clarify my questions.

Thanks,

Ram.