stm32f7discovery

[vrba1]

Posted on July 27, 2015 at 19:16

Hello,

I need help with pwm on stm32f7 discovery, have you any examples?

Regards

#stm32f7-discovery-pwm-examples

[Tesla DeLorean]

Posted on July 27, 2015 at 20:29

Sorry I don't, would suggest you port from the other F7 examples

STM32Cube_FW_F7_V1.1.0\Projects\STM32756G_EVAL\Examples\TIM\TIM_PWMOutput

[megahercas6]

Posted on July 28, 2015 at 09:14

void TIM_Config(void)
{
TIM_HandleTypeDef htim1;
TIM_MasterConfigTypeDef sMasterConfig;
TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig;
TIM_OC_InitTypeDef sConfigOC;
__TIM1_CLK_ENABLE();
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.Pin = GPIO_PIN_11;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF1_TIM1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
htim1.Instance = TIM1;
htim1.Init.Prescaler = 1000;
htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
htim1.Init.Period = 60000;
htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim1.Init.RepetitionCounter = 1;
HAL_TIM_PWM_Init(&htim1);
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterOutputTrigger2 = TIM_TRGO2_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig);
sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
sBreakDeadTimeConfig.DeadTime = 0;
sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
sBreakDeadTimeConfig.BreakFilter = 0;
sBreakDeadTimeConfig.Break2State = TIM_BREAK2_DISABLE;
sBreakDeadTimeConfig.Break2Polarity = TIM_BREAK2POLARITY_HIGH;
sBreakDeadTimeConfig.Break2Filter = 0;
sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;
HAL_TIMEx_ConfigBreakDeadTime(&htim1, &sBreakDeadTimeConfig);
sConfigOC.OCMode = TIM_OCMODE_PWM1;
sConfigOC.Pulse = 16000;
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCFastMode = TIM_OCFAST_ENABLE;
sConfigOC.OCIdleState = TIM_OCIDLESTATE_SET;
sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;
HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_4);
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_4);
}

this is functional code that took long time to make it work. But never try to change CCR register or frequency. But it should work

[vrba1]

Posted on July 28, 2015 at 19:09

Thank you, that's what I needed

v

[u12011658]

Posted on September 08, 2015 at 11:56

This code is not working for me? On which port is the PWM output? I can't find Port A11 on the discovery board as it is indicated in this code.

I also tried to change the port/timer/channel and don't get any PWM from ports. I'm following the STM32F7 Discovery Manual to set the correct port/timer/channel but don't see anything on the oscilloscope. 

[Tesla DeLorean]

Posted on September 08, 2015 at 14:38

TIM1-CH1 (PA8) on the Arduino header (D5) might require the least changes