STM32F100 on STM32VL Discovery - PWM complementary

bartocham · Post by **bartocham** » Sat Nov 01, 2014 4:17 pm

Hi!

I'm playing with STM32VL Discovery board. I want to get PWM signal on both - normal and complementary output.

I found out that TIM1 is PWM timer with complementary outputs and that TIM1_CH1 is connected as alternate function to PA8 and TIM1_CH1N is also connected as alternate to PB13.

I'm newbie so I'm scarred as hell about destroying my board so correct if I'm wrong but I think my code should look like:

part of board.h:

Code: Select all

/*
 * Port A setup.
 * Everything input with pull-up except:
 * PA0  - Normal input      (BUTTON).
 * PA8   - Alternate Push Pull output 50MHz   (TIM1_CH1)
 */
#define VAL_GPIOACRL            0x88888884      /*  PA7...PA0 */
#define VAL_GPIOACRH            0x8888888B      /* PA15...PA8 */
#define VAL_GPIOAODR            0xFFFFFFFF

/*
 * Port B setup.
 * Everything input with pull-up except:
 * PB13   - Alternate Push Pull output 50MHz   (TIM1_CH1N)
 */
#define VAL_GPIOBCRL            0x88888888      /*  PB7...PB0 */
#define VAL_GPIOBCRH            0x88B88888      /* PB15...PB8 */
#define VAL_GPIOBODR            0xFFFFFFFF

my main.c:

Code: Select all

/*
    ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

#include "ch.h"
#include "hal.h"

static PWMConfig pwmcfg = {
  10000, /* 10Khz PWM clock frequency */
  10000, /* PWM period 1 second */
  NULL,  /* No callback */
  /* Only channel 4 enabled */
  {
    {PWM_OUTPUT_DISABLED, NULL},
    {PWM_OUTPUT_DISABLED, NULL},
    {PWM_OUTPUT_DISABLED, NULL},
    {PWM_OUTPUT_ACTIVE_HIGH, NULL},
  },
  0
};


int main(void)
{

  halInit();
  chSysInit();

  /* Enables PWM output (of TIM1, channel 1) on LED connected to PA8 */
  palSetPadMode(GPIOA, 8, PAL_MODE_ALTERNATE(2));

  /* Enables PWM output (of TIM1, channel 1N) on LED connected to PB13 */
  palSetPadMode(GPIOB, 13, PAL_MODE_ALTERNATE(2));

  pwmStart(&PWMD1, &pwmcfg);
  pwmEnableChannel(&PWMD1, 0, 5000);

  while (TRUE) {
    chThdSleepMilliseconds(5000);
  }
}

I would be really appreciated if you could help me with that topic.

Thanks!!

Matthew

Update:

And don't know what's wrong but I get those errors from compiler ;/

Can you also help me with that?

bartocham · Post by **bartocham** » Sat Nov 01, 2014 8:20 pm

I found bugs in code and in mcu config - I used that one from STM32VL example now my code looks like:

Code: Select all

/*
    ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

#include "ch.h"
#include "hal.h"
#include "halconf.h"
#include "pwm.h"
#include "pal.h"
#include "pwm_lld.h"
#include "pal_lld.h"

static PWMConfig pwmcfg = {
  10000, /* 10Khz PWM clock frequency */
  10000, /* PWM period 1 second */
  NULL,  /* No callback */
  /* Only channel 1 enabled */
  {
    {PWM_OUTPUT_ACTIVE_HIGH, NULL},
    {PWM_OUTPUT_DISABLED, NULL},
    {PWM_OUTPUT_DISABLED, NULL},
    {PWM_OUTPUT_DISABLED, NULL},
  },
  0,
  0
};

int main(void)
{

  halInit();
  chSysInit();

  /* Enables PWM output (of TIM1, channel 1) on LED connected to PA8 */
  palSetPadMode(GPIOA, 8, PAL_MODE_STM32_ALTERNATE_PUSHPULL);

  /* Enables PWM output (of TIM1, channel 1N) on LED connected to PB13 */
  palSetPadMode(GPIOB, 13, PAL_MODE_STM32_ALTERNATE_PUSHPULL);

  pwmStart(&PWMD1, &pwmcfg);
  pwmEnableChannel(&PWMD1, 0, 5000);

  while (TRUE) {
    chThdSleepMilliseconds(5000);
  }
}

and mcuconf.h

Code: Select all

/*
    ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

#define STM32F100_MCUCONF

/*
 * STM32F103 drivers configuration.
 * The following settings override the default settings present in
 * the various device driver implementation headers.
 * Note that the settings for each driver only have effect if the whole
 * driver is enabled in halconf.h.
 *
 * IRQ priorities:
 * 15...0       Lowest...Highest.
 *
 * DMA priorities:
 * 0...3        Lowest...Highest.
 */

/*
 * HAL driver system settings.
 */
#define STM32_NO_INIT                       FALSE
#define STM32_HSI_ENABLED                   TRUE
#define STM32_LSI_ENABLED                   FALSE
#define STM32_HSE_ENABLED                   TRUE
#define STM32_LSE_ENABLED                   FALSE
#define STM32_SW                            STM32_SW_PLL
#define STM32_PLLSRC                        STM32_PLLSRC_HSE
#define STM32_PLLXTPRE                      STM32_PLLXTPRE_DIV1
#define STM32_PLLMUL_VALUE                  3
#define STM32_HPRE                          STM32_HPRE_DIV1
#define STM32_PPRE1                         STM32_PPRE1_DIV1
#define STM32_PPRE2                         STM32_PPRE2_DIV1
#define STM32_ADCPRE                        STM32_ADCPRE_DIV2
#define STM32_MCOSEL                        STM32_MCOSEL_NOCLOCK
#define STM32_RTCSEL                        STM32_RTCSEL_HSEDIV
#define STM32_PVD_ENABLE                    FALSE
#define STM32_PLS                           STM32_PLS_LEV0

/*
 * ADC driver system settings.
 */
#define STM32_ADC_USE_ADC1                  TRUE
#define STM32_ADC_ADC1_DMA_PRIORITY         2
#define STM32_ADC_ADC1_IRQ_PRIORITY         6

/*
 * EXT driver system settings.
 */
#define STM32_EXT_EXTI0_IRQ_PRIORITY        6
#define STM32_EXT_EXTI1_IRQ_PRIORITY        6
#define STM32_EXT_EXTI2_IRQ_PRIORITY        6
#define STM32_EXT_EXTI3_IRQ_PRIORITY        6
#define STM32_EXT_EXTI4_IRQ_PRIORITY        6
#define STM32_EXT_EXTI5_9_IRQ_PRIORITY      6
#define STM32_EXT_EXTI10_15_IRQ_PRIORITY    6
#define STM32_EXT_EXTI16_IRQ_PRIORITY       6
#define STM32_EXT_EXTI17_IRQ_PRIORITY       6
#define STM32_EXT_EXTI18_IRQ_PRIORITY       6
#define STM32_EXT_EXTI19_IRQ_PRIORITY       6

/*
 * GPT driver system settings.
 */
#define STM32_GPT_USE_TIM1                  FALSE
#define STM32_GPT_USE_TIM2                  FALSE
#define STM32_GPT_USE_TIM3                  FALSE
#define STM32_GPT_USE_TIM4                  FALSE
#define STM32_GPT_USE_TIM5                  FALSE
#define STM32_GPT_USE_TIM8                  FALSE
#define STM32_GPT_TIM1_IRQ_PRIORITY         7
#define STM32_GPT_TIM2_IRQ_PRIORITY         7
#define STM32_GPT_TIM3_IRQ_PRIORITY         7
#define STM32_GPT_TIM4_IRQ_PRIORITY         7
#define STM32_GPT_TIM5_IRQ_PRIORITY         7
#define STM32_GPT_TIM8_IRQ_PRIORITY         7

/*
 * I2C driver system settings.
 */
#define STM32_I2C_USE_I2C1                  FALSE
#define STM32_I2C_USE_I2C2                  FALSE
#define STM32_I2C_I2C1_IRQ_PRIORITY         5
#define STM32_I2C_I2C2_IRQ_PRIORITY         5
#define STM32_I2C_I2C1_DMA_PRIORITY         3
#define STM32_I2C_I2C2_DMA_PRIORITY         3
#define STM32_I2C_I2C1_DMA_ERROR_HOOK()     chSysHalt()
#define STM32_I2C_I2C2_DMA_ERROR_HOOK()     chSysHalt()

/*
 * ICU driver system settings.
 */
#define STM32_ICU_USE_TIM1                  FALSE
#define STM32_ICU_USE_TIM2                  FALSE
#define STM32_ICU_USE_TIM3                  FALSE
#define STM32_ICU_USE_TIM4                  FALSE
#define STM32_ICU_USE_TIM5                  FALSE
#define STM32_ICU_USE_TIM8                  FALSE
#define STM32_ICU_TIM1_IRQ_PRIORITY         7
#define STM32_ICU_TIM2_IRQ_PRIORITY         7
#define STM32_ICU_TIM3_IRQ_PRIORITY         7
#define STM32_ICU_TIM4_IRQ_PRIORITY         7
#define STM32_ICU_TIM5_IRQ_PRIORITY         7
#define STM32_ICU_TIM8_IRQ_PRIORITY         7

/*
 * PWM driver system settings.
 */
#define STM32_PWM_USE_ADVANCED              FALSE
#define STM32_PWM_USE_TIM1                  TRUE
#define STM32_PWM_USE_TIM2                  FALSE
#define STM32_PWM_USE_TIM3                  FALSE
#define STM32_PWM_USE_TIM4                  FALSE
#define STM32_PWM_USE_TIM5                  FALSE
#define STM32_PWM_USE_TIM8                  FALSE
#define STM32_PWM_TIM1_IRQ_PRIORITY         7
#define STM32_PWM_TIM2_IRQ_PRIORITY         7
#define STM32_PWM_TIM3_IRQ_PRIORITY         7
#define STM32_PWM_TIM4_IRQ_PRIORITY         7
#define STM32_PWM_TIM5_IRQ_PRIORITY         7
#define STM32_PWM_TIM8_IRQ_PRIORITY         7

/*
 * RTC driver system settings.
 */
#define STM32_RTC_IRQ_PRIORITY              15

/*
 * SERIAL driver system settings.
 */
#define STM32_SERIAL_USE_USART1             TRUE
#define STM32_SERIAL_USE_USART2             FALSE
#define STM32_SERIAL_USE_USART3             FALSE
#define STM32_SERIAL_USART1_PRIORITY        12
#define STM32_SERIAL_USART2_PRIORITY        12
#define STM32_SERIAL_USART3_PRIORITY        12

/*
 * SPI driver system settings.
 */
#define STM32_SPI_USE_SPI1                  TRUE
#define STM32_SPI_USE_SPI2                  FALSE
#define STM32_SPI_SPI1_DMA_PRIORITY         1
#define STM32_SPI_SPI2_DMA_PRIORITY         1
#define STM32_SPI_SPI1_IRQ_PRIORITY         10
#define STM32_SPI_SPI2_IRQ_PRIORITY         10
#define STM32_SPI_DMA_ERROR_HOOK(spip)      chSysHalt()

/*
 * UART driver system settings.
 */
#define STM32_UART_USE_USART1               TRUE
#define STM32_UART_USE_USART2               FALSE
#define STM32_UART_USE_USART3               FALSE
#define STM32_UART_USART1_IRQ_PRIORITY      12
#define STM32_UART_USART2_IRQ_PRIORITY      12
#define STM32_UART_USART3_IRQ_PRIORITY      12
#define STM32_UART_USART1_DMA_PRIORITY      0
#define STM32_UART_USART2_DMA_PRIORITY      0
#define STM32_UART_USART3_DMA_PRIORITY      0
#define STM32_UART_DMA_ERROR_HOOK(uartp)    chSysHalt()

Would it now work as it is supposed to be?

Post by **Giovanni** » Sat Nov 01, 2014 9:44 pm

Hi,

It looks OK, don't be too worried about the board, it never happened to me to break one by just running a program.

Giovanni

bartocham · Post by **bartocham** » Sun Nov 02, 2014 11:30 am

Hi,

Now I have another problem. I get two LEDs connected via 330Ohm resistors to those PA8 and PB13 - I want to see if I get the PWM.

Compilation is going fine. I've created ST-Link GDB server config as below:

After that I've created debug config as below:

After running ST-Link SWD I get below console code:

Atollic TrueSTUDIO gdbserver for ST-Link. Version 1.9.0 Pro
Copyright 2010-2014, Atollic AB.

Starting server with the following options:
Persistant Mode : Enabled
LogFile Name : debug_log.txt
Logging Level : 31
Listen Port Number : 61234
Status Refresh Delay : 15s
Verbose Mode : Disabled
SWD Debug : Enabled

Connecting to the ST-Link Debugger... OK
Waiting for debugger connection...

After running my debugg configuration I have - execution is suspended because of an error.

For a moment I see some errors in console but the consoled is cleared fast so I have no idea what errors are they.

Some ideas what I have wrong ?

Post by **Giovanni** » Sun Nov 02, 2014 11:45 am

What GDB server is that?

Giovanni

bartocham · Post by **bartocham** » Sun Nov 02, 2014 11:48 am

Hi,

It's from

Atollic TrueSTUDIO® for ARM® Lite.

Downloaded from here http://atollic.com/index.php/download

bartocham · Post by **bartocham** » Sun Nov 02, 2014 12:47 pm

Hi,

I found older version of GDB and now it works fine. I've flashed program.

On TIM1_CH1 - PA8 I get a pwm signal but on TIM1_CH1N I did not. Do I have to enable some sort of function to use complementary output ?

bartocham · Post by **bartocham** » Sun Nov 02, 2014 1:38 pm

Ok found it

now I see both diodes blinking

Code: Select all

/*
    ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

#include "ch.h"
#include "hal.h"
#include "halconf.h"
#include "pwm.h"
#include "pal.h"
#include "pwm_lld.h"
#include "pal_lld.h"

static PWMConfig pwmcfg = {
  10000, /* 10Khz PWM clock frequency */
  10000, /* PWM period 1 second */
  NULL,  /* No callback */
  /* Only channel 1 enabled */
  {
    {PWM_OUTPUT_ACTIVE_HIGH | PWM_COMPLEMENTARY_OUTPUT_ACTIVE_HIGH, NULL},
    {PWM_OUTPUT_DISABLED, NULL},
    {PWM_OUTPUT_DISABLED, NULL},
    {PWM_OUTPUT_DISABLED, NULL},
  },
  0,
  0
};

int main(void)
{

  halInit();
  chSysInit();

  /* Enables PWM output (of TIM1, channel 1) on LED connected to PA8 */
  palSetPadMode(GPIOA, 8, PAL_MODE_STM32_ALTERNATE_PUSHPULL);

  /* Enables PWM output (of TIM1, channel 1N) on LED connected to PB13 */
  palSetPadMode(GPIOB, 13, PAL_MODE_STM32_ALTERNATE_PUSHPULL);

  pwmStart(&PWMD1, &pwmcfg);
  pwmEnableChannel(&PWMD1, 0, 5000);

  while (TRUE) {
    chThdSleepMilliseconds(5000);
  }
}

But I don't know why near " };" after PWMConfig pwmcfg I get compiler error about missing field initializers

Update:

found it too

new code for all interested:

Code: Select all

/*
    ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

#include "ch.h"
#include "hal.h"
#include "halconf.h"
#include "pwm.h"
#include "pal.h"
#include "pwm_lld.h"
#include "pal_lld.h"

static PWMConfig pwmcfg = {
  10000, /* 10Khz PWM clock frequency */
  10000, /* PWM period 1 second */
  NULL,  /* No callback */
  /* Only channel 1 enabled */
  {
    {PWM_OUTPUT_ACTIVE_HIGH | PWM_COMPLEMENTARY_OUTPUT_ACTIVE_HIGH, NULL},
    {PWM_OUTPUT_DISABLED, NULL},
    {PWM_OUTPUT_DISABLED, NULL},
    {PWM_OUTPUT_DISABLED, NULL},
  },
  0,
  0,
#if STM32_PWM_USE_ADVANCED
  0
#endif
};

int main(void)
{

  halInit();
  chSysInit();

  /* Enables PWM output (of TIM1, channel 1) on LED connected to PA8 */
  palSetPadMode(GPIOA, 8, PAL_MODE_STM32_ALTERNATE_PUSHPULL);

  /* Enables PWM output (of TIM1, channel 1N) on LED connected to PB13 */
  palSetPadMode(GPIOB, 13, PAL_MODE_STM32_ALTERNATE_PUSHPULL);

  pwmStart(&PWMD1, &pwmcfg);
  pwmEnableChannel(&PWMD1, 0, 5000);

  while (TRUE) {
    chThdSleepMilliseconds(5000);
  }
}

bartocham · Post by **bartocham** » Thu Nov 20, 2014 7:30 pm

Hi Giovani!

I don't have an oscilloscope and on LEDs it is hard to observe, but correct me if I'm wrong.
I'm trying to get 100Hz PWN signal with 50% DC so my config should like like this one below right?

Code: Select all

static PWMConfig pwmcfg = {
  10000, /* 10Khz PWM clock frequency */
  10, 
  NULL,  /* No callback */
  /* Only channel 1 enabled */
  {
    {PWM_OUTPUT_ACTIVE_HIGH | PWM_COMPLEMENTARY_OUTPUT_ACTIVE_HIGH, NULL},
    {PWM_OUTPUT_DISABLED, NULL},
    {PWM_OUTPUT_DISABLED, NULL},
    {PWM_OUTPUT_DISABLED, NULL},
  },
  0,
  0,
#if STM32_PWM_USE_ADVANCED
  0
#endif
};

And than in main:

Code: Select all

  pwmStart(&PWMD1, &pwmcfg);
  pwmEnableChannel(&PWMD1, 0, 10);

Post by **Giovanni** » Thu Nov 20, 2014 8:05 pm

That configuration will give you 1000hz, you also need to set to alternate the timer output pin.

Giovanni

ChibiOS Free Embedded RTOS

STM32F100 on STM32VL Discovery - PWM complementary

STM32F100 on STM32VL Discovery - PWM complementary

Re: STM32F100 on STM32VL Discovery - PWM complementary

Re: STM32F100 on STM32VL Discovery - PWM complementary

Re: STM32F100 on STM32VL Discovery - PWM complementary

Re: STM32F100 on STM32VL Discovery - PWM complementary

Re: STM32F100 on STM32VL Discovery - PWM complementary

Re: STM32F100 on STM32VL Discovery - PWM complementary

Re: STM32F100 on STM32VL Discovery - PWM complementary

Re: STM32F100 on STM32VL Discovery - PWM complementary

Re: STM32F100 on STM32VL Discovery - PWM complementary