CCS/MSP-EXP430F5438: MSP-EXP430F5438 Experimenter Board : User Experience Code is not working

Hi VR,
the SW where are you looking you can find here:
www.ti.com/.../getliterature.tsp

The useful Guide where you can find a step by step tutorial you can find here:
www.ti.com/.../slau263

and if needed, you can can find the older EVM User Guide (also for the F5438-w/o A device) here:
e2e.ti.com/.../slau263d.pdf

All other Information, example codes (like PWM) and so on you can find here:
www.ti.com/.../MSP-EXP430F5438

I hope this helps!

Best regards,
Jens

Hi Jens,

Thanks for your reply.
However, I have downloaded same files when I got the kit.
I have tried them again by deleting older files and tried to load again with the files downloaded today.
I see same result ,just backlight LCD coming up without any any menu as mentioned in User guide.

I was able to execute some other small programs wirtten by me like BLink LEd with push button polling and push button GPIO Interrupts.
But, I cant see any LCD menu user Demo program with SLAC277I.

Regards,
VR

Hi VR,

Which device do you used (F5438 or F5438A)? Which compiler do you use and which output format?

I have Device F5438A and using Code Composer Studio Version: 7.1.0.00016.

Here you can find the Compiler settings:

Project Explorer -> right click on project -> Properties

Hi Jens G,

It is MSP430 Compiler with Version TI V16.9.3.LTS and Output Format of eabi (ELF).

Regards,
Raju

Hi

Please refer to me standalone LCD code (may just slidesshow of few pics) and code of Audio Play from internal flash stored WAV file.
I will try to make use of them..

Regards,
Raju

Hi Katie,

Thanks for the reply.
It Looks like Rev 0-03 or later board as per code execution. It is not struck with while(1) after if (!assert_board_version()) check.
As per PCB, it is Rev 0-04. I could run example code of Grlib code to see Pictures on LCD and also ran some other expale codes.
I request you to guide me with any standalone Audio Play code(PWM from Audio file) and record code, which I can test in stand alone mode and then I can integrate it with my requirements.

I am looking Forward for your reply,struck with this Problem for more than a week.

Regards,
Raju

Hi Katie, I have tried to use above monetioned referecnes for my Experiment. Somehow, It is not working.

Please help me with standalone code of PWM Audio on Headset Jack via P4.4 or  User Experience Demo code.

If User experience Demo works, I can extract working Portion to my requirement.. Looking for froward for your help.

Regards,

Raju

Hi Katie, I have tried to use above mentioned references for my Experiment. Somehow, It is not working.

Please help me with standalone code of PWM Audio on Headset Jack via P4.4 or User Experience Demo code.

If User experience Demo works, I can extract working part of code to my requirement.. Looking for froward for your help.

Regards,

Raju

Hi Raju,

Could you please explain what is not working about the other examples so we can provide some guidance?

For the out-of-box code for the MSP-EXP430F5438, it can be found on the tool folder for that board (click the link for MSP-EXP430F5438 here) or in TI Resource Explorer. Here is a link to it in the web version of Resource explorer: dev.ti.com/.../

Hope that this helps.

Regards,
Katie

Hi Katie,

Many Thanks for your Support.
I have used example code like Grlib LCD , Timer and Interrupt codes to develop an Interrupt based LCD slideshow.
However, out of box demo code has never worked for me,Just I could Flash successfully, but no Menu appears and nothing happes as screen is just while backlight without any text. I could not debug this code.Hence, I request you to give me any working code of playback or Play of .wav file converted data string file.

I have referred few e2e threads and Weblinks to Play Audio or Music of 1 second length files. Somehow, they are not working as expected.
I was trying to Play Audio through Port P4.4 via Headset jack of MSP-EXP430F5438 using Timer B0 ISR or PWM mode.

e2e.ti.com/.../219093
artists.sci-toys.com/speech

I am not exactly able to debug this code,why exaclty it is not working.
I was able to string read data and load it in TBCCR0 and but , not getting any audio over headset.
I have tried with SMCLK of 1MHz and 16MHz clocks.

Is there any otherway to contact you directly over phone or email, so I can explain it more clearly. I have struck at this Point for weeks.

Regards,
Raju

Hi Jace H,

Thanks for your reply. I have referred few other reference designs and playback codes to use Timer B0.

However, I am unable to hear any voice or noise with Adaption to my board. I have abasic question.

How can we hear Audio with 62K or 32KHy PWM frequency. I could hear some noise around 4kHz PWM frequncy with other codes.

Please suggest.

Regards,

Raju

Hello Raju,

What is the bit length for each sample? Also do you have sound files that are at your bit sample + frequency you using? I'm assuming you are referring to playback frequency above. More than likely the issue is you are not filling the Timer CCR in time for audio to play. Please refer to section 3.2 of the above TI Design for more information on playback frequency and bit length .

Hi JH,
Lenght of each sample is 8 bit, which is generated from .wav file with PCM 8bit, 8ksp, mono Format.
In example codes, always TBCCR0 is set to 0xFF with either 8MHz or 16MHh SMCLK, which makes PWM frequency either 32KHz or 62KHz.
And, TB0CCR4 is loaded with data of Audio string of 8 bit hex sample. I managed to run PWM on P4.4, but with the PWM frequency of 32KHz or 62KHz , i cannot hear anything from Headset jack.
With the below code, I was trying to Play Audio string of 4044 characters(8 bit). I can see data toggling on P4.4 with frequncy of 28KHz.
But, no Audio on Headset. Please correct this code so, I can make changes to get Audio.

void main (void)
{
WDTCTL = WDTPW+WDTHOLD; // Stop WDT
P11DIR |= 0x07; // Set P11.0,1,2 as O/P for ACLK,SMCLK and MCLK
P11SEL|= 0x07; // Enable P11.0,1,2 for ACLK,SMCLK and MCLK
//********************Configure clock SMCLK to 8MHz*****************************//
unsigned char FD;
UCSCTL3 |= SELREF_2; // Set DCO FLL reference = REFO
UCSCTL4 |= SELA_2; // Set ACLK = REFO

__bis_SR_register(SCG0); // Disable the FLL control loop
UCSCTL0 = 0x0000; // Set lowest possible DCOx, MODx
UCSCTL1 = DCORSEL_5; // Select DCO range 16MHz operation
FD = 244; // N = 244 for 8MHz and 488 for 16MHz
UCSCTL2 = FLLD_1 + FD; // Set DCO Multiplier for 8MHz
// (N + 1) * FLLRef = Fdco
// (244 + 1) * 32768 = 8MHz ,// (487 + 1) * 32768 = 16MHz
// Set FLL Div = fDCOCLK/2
__bic_SR_register(SCG0); // Enable the FLL control loop
__delay_cycles(250000);
// Loop until XT1,XT2 & DCO fault flag is cleared
do
{
UCSCTL7 &= ~(XT2OFFG + XT1LFOFFG + XT1HFOFFG + DCOFFG);
// Clear XT2,XT1,DCO fault flags
SFRIFG1 &= ~OFIFG; // Clear fault flags
}while (SFRIFG1&OFIFG); // Test oscillator fault flag

//********************Configure clock SMCLK to 8MHz*****************************//
P4SEL |= 0xFF; // P4 option select
P4DIR |= 0xFF; // P4 outputs

__bis_SR_register(GIE); // Enter LPM4 w/interrupt

TBCCR0 = 0xFF; //SMCLK as CLK source
unsigned int x;
char state = 1;
char byte = 0;
while(1)
/ {
int x = 0;
for( x = 0; x < 4004; x++ )
{
TBCCTL4 = OUTMOD_7; // CCR4 reset/set
TBCCR4 = data[x]; // CCR4 PWM duty cycle
TBCTL = TBSSEL_2 + MC_1 + TBCLR ; // SMCLK(TBSSEL_2),ACLK(TBSSEL_1), upmode, clear TBR
__delay_cycles(256);
}
}
}

Hello Raju,

If you have an 8-bit PCM stream that has a playback frequency of 8kHz, and you run that data out at 16 or 32 kHz, then in order to get the same sound, you'll have to double or quadruple your samples respectively. If you do not then you will experience a frequency shift of the sample and either get distortion or no sound out all depending on your output filters.

Otherwise, you'll have to get a different source data for each of the different playback frequencies you want to do.