MSP430FR6989: MSP430FR6989: Trying to debug JTAG timing sequences for msp430 devices.

Ling,

Thank you so much for your kind reply

I removed those functions from initcontroller(), clock settings and core voltage because I was using FR6989 development board and I thought it is unnecessary for me to use them. If I have to set the clock frequency and core voltage please tell me why I should do it. I cannot find that in JTAG documentation.

coming to DrvSignals() function I have configured SBW pin directions but I have completely changed them since I am not using I/O translator in my prototype.

below is the piece of code to set direction of SBW pins, please tell me if this is correct or not.

//----------------------------------------------------------------------------
//! \brief Set the direction for the TDIO pin
//! \param dir (0 = IN, !0 = OUT)
void TDOI_dir(word dir)
{
// Always set to input in the F5437
if( dir == 0 )
JTAGDIR |= TDIO; //Input to target From host (Host Output)
else
JTAGDIR &= ~TDIO; //Input from target to host (Host Input)
}

//----------------------------------------------------------------------------
//! \brief Set up I/O pins for JTAG communication
void DrvSignals(void)
{
JTAGSEL = 0x00; //Select GPIO pins
TDOI_dir( 0 ); //Host Output
JTAGOUT = TDIO + TCK;

}

Ling,

Thank you for your kind reply, I don't think I am generating any clock pulse through SBWTCK, My question is do we have to do that separately or timing sequences will automatically do that.

Vishal, you have the simplest combination for slau320, FRAM as master and slave device. Basically, timing for your combination is irrelevant, because there is no flash memory and writing / verifying can be done simple by using Quick Write / Read function. Anyway, timing (for entry sequence) can be found in device datasheet, in JTAG and Spy-Bi-Wire Interface section. I done this successfully, without scope, but if you have any interface problems, use scope, it is easier.

Thank you for your kind reply and link to the example code, I see you have used MSP430FR 5739. Have you done it on a development board or standalone processor?

No, this is not my code. As master device I was using MSP430F5510, but it was written from zero, in assembler, using slau320 as reference. I think that this FR5739 example (if it is working OK) is more than enough for porting slau320 to any FR device.

Ling,

I haven't got the time to try it I will let you know.