Moving code from G030 to C011

[stevecimo]

Hi All

I have a breakout board, I've been testing some ws2812 code , I'm using  TIM1 with DMA + PWM

I developed the code on the G030, it's a 32 pin package.

I'm using internal clock and have it running at 48MHz for Timers.

Works has intended. 

Switch to C011 in an 8 Pin package.

Created new project in MX and just copied over the code I added.

I'm using internal clock and have it running at 48MHz for Timers.

Code does not work.  complies fine, but the leds not work.

In both porjects I am using TIM1 , configured the same way.

I don't have a Scope where I can view the PWM output

Question:  Does anyone of a any differences between how TIM1 works between both MCU? I looked through  AN5969   Migrating between STM32G0 and STM32C0 MCUs  and nothing jumped out.

Can I use CudeMonitor to review the PWM?

Any suggestions would be highly appreciated.

Regards, Stephen 

[Sarra.S]

Hello @stevecimo, 

The STM32C0 series and STM32G0 series are pin-to-pin compatible, using the same package ofc! 

Are you using this package for STM32C011 and for the STM32G030?

[AScha.3]

It should work...if compiler shows no warnings...?

+

to check, the tim/pwm setting: just stop it in debug and look at sfr -> tim1 , to see, whats it doing:

[Hl_st]

Hello,

can you please share also your projects? 

[stevecimo]

Hi Sarra

I'm using an 8 pin package for the C011 and a 32 pin package for the G030

Regards, Stephen 

[stevecimo]

No warnings, compile is clean in both projects

I'm on my way to work, I'll see if I can run the debug checks in a few days, have to study for an Azure test tonight. ( at 58 years old and 40 years working in IT, work still wants me to do  Azure test..I hate tests....)

[stevecimo]

happy to , has log has no one laugh's out loud at my coding :)

Bottom line, is I have made some 7 segment led displays 19mm x 12mm  using ws2812 leds

[stevecimo]

basically  I first create an array  of  color (rgb) data for 7 leds, in the correct order

color = ((LED_Data[i][1]<<16) | (LED_Data[i][2]<<8) | (LED_Data[i][3]));

then from this array , i create an second array to hold the pwm data to be sent via DMA.

for (int i=23 ; i>=0; i--)

{

if (color&(1<<i))

{

pwmData[index] = 40; // 2/3 60 using 48MHz clock with AAR of 60 800KHz

}

else pwmData[index] = 20; // 1/3 of 60

index++;

}

}

for (int i=0; i<50; i++)

{

pwmData[index] = 0; // add some zeros at the end to flag end of transmission

index++;

}

HAL_TIM_PWM_Start_DMA(&htim1, TIM_CHANNEL_1, (uint32_t *)pwmData, index);

while (!datasentflag){};

datasentflag = 0;

}

This works fine with the G030, nothing or random leds light up with the C011

Both MCU are using a 48MHz timer clock. 0 Prescaler and an arr of 60 to give 800KHz timing

C011:

htim1.Instance = TIM1;

htim1.Init.Prescaler = 0;

htim1.Init.CounterMode = TIM_COUNTERMODE_UP;

htim1.Init.Period = 60-1;

htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;

htim1.Init.RepetitionCounter = 0;

htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;

G030

htim1.Instance = TIM1;

htim1.Init.Prescaler = 0;

htim1.Init.CounterMode = TIM_COUNTERMODE_UP;

htim1.Init.Period = 60-1;

htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;

htim1.Init.RepetitionCounter = 0;

htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;

 On the G030 I us PLL to get a 48MHz clock (C011 runs 48MHz internal clock)  

/** Initializes the RCC Oscillators according to the specified parameters

* in the RCC_OscInitTypeDef structure.

*/

RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;

RCC_OscInitStruct.HSIState = RCC_HSI_ON;

RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;

RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;

RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;

RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1;

RCC_OscInitStruct.PLL.PLLN = 9;

RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;

RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV3;

[KnarfB]

There shouldn't be a difference at the HAL level.

Are the pins properly configured?

Same LEDs or other ones? Some are said to need a longer (300++ µs) reset pulse.

A $10 USB logic analyzer could be a great help here.

hth

KnarfB

[stevecimo]

This is my basic setup, I just swap the 2 break out boards, same leds , using a bench powersupply at 3.3 volts , 

I preformed all my original testing with the G030, with the C011 , I have only run basic led toggling code. before trying to move my code from G030 to it.

All done with the CubeIDE, just configured a new project for the C011

, Then used the IDE's compare file feature to code over my parts of the code from the G030 main.c, not using any libraries or extra .h .c files.....

Hmmm, maybe I should double check I have  selected the right C011?  apart from Flash sizes, is there any difference in timer operations between submodels to the same main MCU type?