TMS320C6678: TMDXEVM6678LE Signal delay

Depeng,

The same sequence of code is done in both the gel ( ontargetconnect() )  and the platform_init in ti.platform.evm6678l.ae66 ( i.e., Platform - lib ) .

i.e., 

PLL initialization

PSC power domain setup

Pll3 pass clk

 Pll2 DDR3 PLL

DDR initialization and memory test

Configure SGMII SERDES

EnableEDC_OneforAll

setCpSwConfig 

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Now, when we compare the code, the following is the difference

=========

In Gel : 

=========

1. There is no "error checking" like read back the setup-data and verify that the register settings / values are correct..

For example, 

/* Read back */
status = CorePllcGetHwSetup (&pllc_hwSetupRead); // in platform_init 

2. There is no "For loop" to try again and again until the settings are done correctly. 

In gel, it just do only once. If error pops out that the user will again try doing the "connect target" via emulator.

============

In platform_init: 

=============

1. There is an error checking in PLLC, DDR3PLL etc.

2. There is a for loop trying ten times... to make sure, that the settings are retried....

( for (loop_count = 0; loop_count < 10; loop_count++) 

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More over, when the same Platform_init is flashed into the SPI_NOR, it will be faster than the Gel file initialization.

Do they, run the Platform_init through emulator with CCS or from the flash memories ?

Regards

Shankari G

Depeng,

Yes, it is possible by tscl registers.

You can use the following code to measure the time taken by the code.

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Code snippet: 

//Shankari-Start-Declaration  for time ticks

#include "C:\ti\pdk_keystone2_3_01_04_07\packages\ti\csl\csl_tsc.h"

//<ti/csl/csl_tsc.h>

extern uint32_t utilReadTime32();

//Shankari-End-Declaration  for time ticks

......

/*Throughput calculation initialization */

unsigned int StartTime = 0;
unsigned int EndTime = 0;
unsigned int Total_cycle_ticks = 0;

/*Throughput calculation initialization Ends */

.......

//Usage 

StartTime = utilReadTime32();

// Please insert your code here 

sauConnDmPktTest(tf, pat,
100, /* Number of packets per connection */
512, /* initial payload length */
0, /* payload llength increment step */
SAU_PAYLOAD_INC8 /* payload pattern */
);

EndTime = utilReadTime32();

Total_cycle_ticks = EndTime-StartTime;

 System_printf("StartTime = %d \n", StartTime);
 System_printf("EndTime = %d \n", EndTime);

 System_printf("Total_cycle_ticks = %d \n", Total_cycle_ticks);

// System_printf(" sauConnDmPktTest 2048 PacketSize, 100 packets -Total_cycle_ticks = %d \n", Total_cycle_ticks);

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Time tick calculation , you can use according to the number of Total_cycle_ticks, you get......

Regards

Shankari G