MSP430FR6047: Frequency of HSPLL invalid error when integrating PWM signal on booster header of EVM430-FR6047

Ferial Najaar

Part Number: MSP430FR6047
Other Parts Discussed in Thread: EVM430-FR6047

Tool/software:

Hello,

I am trying to integrate a pair of proportional solenoids with the ultrasonic flowmeter using the EVM430-FR6047 evaluation board. I have two PWM signals running from the booster header of the board to drive the proportional solenoids. However, when I connect the board to the GUI with the PWM code running I'm getting error 22 - Frequency of HSPLL invalid. When I remove the PWM code the error goes away. I have used the PWM demo code for the MPS430 and I am simply running it from main() in the MSP430FR6047EVM_USS_Water_Demo_LPM_02_40_00_00 demo code , please see below.

void main(void)
{
uint16_t reset_source = 0x00;

// Initializes the basic functionality of the system
hal_system_Init();

// Initialize interfaces to user including buttons, LCD, GUI
HMI_Init();

// Verify the reset source and log/report if there was an error
reset_source = hal_system_GetResetSource();
if(reset_source != 0x00)
{
USSLibGUIApp_send_error(COMMAND_HANDLER_ERROR_FAULT_RESET_ERROR,
reset_source);
}

// setup solenoid PWM
SolenoidsInit();
//SetSolenoids(70, 70);

AlgorithmInit();
RunAlgorithm();

__enable_interrupt();

// Initialize the USS Lib
USSLibGUIApp_Init();

// This is the Design Centers Main Loop
USSLibGUIApp_Engine();
}

Am I incorrectly integrating my Solenoid PWM code with the USS_Water_Demo code? Could you please advise on the correct way to integrate my new modules with the demo code as I require the flow rate and temperature from the demo code to change my PWM duty cycle?

I'm fairly new at electronics and working with microcontrollers so apologies if I haven't clearly explained myself. Please let me know if you require any further information to assist with solving this issue.

Many Thanks

6 months ago

0 Dylan OBrien 6 months ago

TI__Genius 13380 points

Hi Ferial,

My primary concern here is whether you do change any of the settings relating to the HSPLL setting. In your code to support the solenoids, do you change any of the settings relating to the PLL? You can read more about which settings affect the PLL, and how to make sure you do have valid HSPLL settings, in the USS Design Center User's Guide PDF.

If you do not change any of these settings, I do see some related threads with the same issue, perhaps you can try the solutions there to see if this helps. Let me know if you need further suggestions once you've taken a look at these.

0 Ferial Najaar 6 months ago in reply to Dylan OBrien

Prodigy 10 points

Hi Dylan

I have not changed any of the settings to support the solenoids, do I need to? I have read through the document you attached and it's not clear to me which settings I would need to change and how.

I've searched through the forums trying to find a solution but haven't found anything that seems similar to my issue. Could you perhaps link the threads you have in mind?

Thank you.

0 Dylan OBrien 6 months ago in reply to Ferial Najaar

TI__Genius 13380 points

I am not familiar with how your solenoids work or if there are any special considerations there, my point was just that if you change some clocking or PLL settings, that could lead to the error warning you are getting. I would not recommend changing any of those settings unless you absolutely have to.

To be more specific about which settings to check: I would recommend that you start by looking at section 11.12 of the document I linked. In that section we have a field called "Range" that indicates a formula for the relationship between signal sampling frequency, PLL frequency, and oversampling rate. If you violate that formula then I believe it will cause the error you are seeing. However, if the code you've added does not touch any of these or the clock settings in general, then you probably don't need to worry about this. Just review it for clarity and to make sure.

To be more clear about some specific threads, I will list them below. Generally, it sounds like the warning you are getting can be fickle and caused by some unexpected factors.

https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/977341/msp430fr6047-error-the-output-frequency-of-the-hspll-is-invalid

https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/764722/ccs-evm430-fr6047-hspll-and-saph-error

Have you stepped through the code to see at what point you get the HSPLL invalid error? That may help to shed some light on the issue. If you can determine which function/functions lead to the generation of the error, we could more easily track down the cause.

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MSP430FR6047: Frequency of HSPLL invalid error when integrating PWM signal on booster header of EVM430-FR6047