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webmaster2
webmaster2
Visitor II
October 19, 2014
Question

STM32Cube Libraries PWM

Posted on October 19, 2014 at 13:38

Hi, I am trying to output two PWM signals through channels 1 & 3 of TIM3.

I'm using the Nucleo F401RE board, so my MCU is STM32F401RE. I checked the example code included with the HAL and also the code generated by STM32CubeMX. This is my current code:

#include ''stm32f4xx.h''

#include ''stm32f4xx_hal.h''

#include ''stm32f4xx_hal_rcc.h''

#include ''stm32f4xx_hal_gpio.h''

#include ''stm32f4xx_hal_tim.h''

#include ''stm32f4xx_hal_tim_ex.h''

#include ''uart.h''

#include ''xprintf.h''

TIM_HandleTypeDef htim3;

int

main(

void

)

{

UART_init(19200);

xfunc_in = UART_getc;

xfunc_out = UART_putc;

xprintf(

''Initializing GPIO and Timer\n''

);

GPIO_InitTypeDef GPIO_InitStruct;

xprintf(

''1\n''

);

/* Peripheral clock enable */

__GPIOC_CLK_ENABLE();

__TIM3_CLK_ENABLE();

xprintf(

''2\n''

);

/**TIM3 GPIO Configuration

PC6 ------> TIM3_CH1

PC8 ------> TIM3_CH3

*/

GPIO_InitStruct.Pin = GPIO_PIN_5;

GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

GPIO_InitStruct.Pull = GPIO_NOPULL;

GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;

HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

GPIO_InitStruct.Pin = GPIO_PIN_6 | GPIO_PIN_8;

GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

GPIO_InitStruct.Pull = GPIO_PULLUP;

GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;

GPIO_InitStruct.Alternate = GPIO_AF2_TIM3;

HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

xprintf(

''3\n''

);

TIM_ClockConfigTypeDef sClockSourceConfig;

TIM_OC_InitTypeDef sConfigOC;

TIM_MasterConfigTypeDef sMasterConfig;

htim3.Instance = TIM3;

htim3.Init.Prescaler = 35;

htim3.Init.CounterMode = TIM_COUNTERMODE_UP;

htim3.Init.Period = 100;

htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;

HAL_TIM_Base_Init(&htim3);

xprintf(

''4\n''

);

HAL_TIM_PWM_Init(&htim3);

xprintf(

''6\n''

);

sConfigOC.OCMode = TIM_OCMODE_PWM1;

sConfigOC.Pulse = 25;

sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;

sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;

HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_1);

HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_3);

xprintf(

''7\n''

);

HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_1);

xprintf(

''8\n''

);

int

i = 0;

while

(1)

{

__HAL_TIM_SetCompare(&htim3, TIM_CHANNEL_1, i++);

if

(i > 1700) i = 0;

HAL_Delay(100);

}

return

0;

}

When I launch the code it stops at the serial checkpoint number 6, so it seems to fail while configuring the PWM channel. When I pause the debug I notice that the

HardFault_Handler(

void

);

function is called.

But if I remove the following line:

HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_1);

it happens that the program reaches the checkpoint number 8 and enters the while loop, which makes no sense to me.

Can someone help me? Thanks

    This topic has been closed for replies.

    2 replies

    Amel NASRI
    Amel NASRI
    ST Technical Moderator
    October 20, 2014
    Posted on October 20, 2014 at 11:22

    Hi Giacomo,

    Are you facing an issue with HAL example as it is or problem is faced only after updating it?

    -Mayla-

    To give better visibility on the answered topics, please click on "Best Answer" on the reply which solved your issue or answered your question.
    Montassar BEN ROMDHANE_O
    Montassar BEN ROMDHANE_O
    Visitor II
    October 20, 2014
    Posted on October 20, 2014 at 12:26

    Hi,

    Can you attach your main.c file so that we can more easily figure out where a problem could be ?

    Regards,

    Heisenberg.

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