Pb generating 2 PMW

[franck2]

Posted on November 21, 2014 at 12:04

The original post was too long to process during our migration. Please click on the attachment to read the original post.

[Tesla DeLorean]

Posted on November 21, 2014 at 18:56

Less blind, and having eaten breakfast... Stuck the scope on this one

// STM32 PMW @4MHz (PA9) and @1MHz (PA3) STM32F3-Discovery - [e-mail]
/**************************************************************************************/
#include ''stm32f3_discovery.h''
#include ''stm32f30x.h''
/**************************************************************************************/
static void TIM_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
uint16_t TimerPeriod = 0;
uint16_t ChannelPulse = 0;
/* GPIOA & GPIOB Clocks enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/* GPIOA & GPIOB Configuration: Channel 3 (TIM2) and Channel 2 (TIM15) as alternate function push-pull */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_3; // TIM2_CH3 (PA9), TIM15_CH2 (PA3)
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_10); // TIM2 PA9 AF10
GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_9); // TIM15 PA3 AF9
/* Compute the value to be set in ARR regiter to generate signal frequency at 1MHz */
TimerPeriod = (SystemCoreClock / 1000000);
/* Compute CCR value to generate a duty cycle at 50% for channel */
ChannelPulse = (uint16_t) (((uint32_t) 5 * TimerPeriod) / 10);
/* Tim15 clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM15, ENABLE);
/* Time Base configuration */
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = TimerPeriod - 1;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM15, &TIM_TimeBaseStructure);
/* Channel Configuration in PWM mode - fully qualify TIM15 is special */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_Pulse = ChannelPulse;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; // Want the Positive
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable; // not the negative
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
TIM_OC2Init(TIM15, &TIM_OCInitStructure); // TIM15_CH2 - PA3
/* Tim15 counter enable */
TIM_Cmd(TIM15, ENABLE);
/* Tim15 Main Output Enable - TIM15 is special on STM32F3 */
TIM_CtrlPWMOutputs(TIM15, ENABLE);
/*----------------------------------------------------------------------- */
/* Compute the value to be set in ARR regiter to generate signal frequency at 4MHz */
TimerPeriod = (SystemCoreClock / 4000000);
/* Compute CCR value to generate a duty cycle at 50% for channel */
ChannelPulse = (uint16_t) (((uint32_t) 5 * TimerPeriod) / 10);
/* Tim2 clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 , ENABLE);
/* Time Base configuration */
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = TimerPeriod - 1;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
/* Channel Configuration in PWM mode */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_Pulse = ChannelPulse;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM_OC3Init(TIM2, &TIM_OCInitStructure); // TIM2_CH3 - PA9
/* Tim2 Counter Enable */
TIM_Cmd(TIM2, ENABLE);
}
/**************************************************************************************/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f30x.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f30x.c file
*/
/* TIM Configuration */
TIM_Config();
/* Infinite loop */
while (1);
}
/**************************************************************************************/
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf(''Wrong parameters value: file %s on line %d

'', file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif

[franck2]

Posted on November 21, 2014 at 19:19

Scope verdict: Tim15_Ch2 still dead!

[franck2]

Posted on November 21, 2014 at 19:27

Scope probe check and working fine....

________________

Attachments :

Screen_2014-11-21_07-26-27.jpeg : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I14R&d=%2Fa%2F0X0000000bi0%2FJne6cqueKuo_MA9TgvpA.yz5HvKTm1Jorm2p0Qxoafc&asPdf=false

[Tesla DeLorean]

Posted on November 21, 2014 at 19:32

Sorry my scope isn't that fancy, but definitely getting 1 MHz on PA3 of an STM32F3-DISCO, don't know what PA3 is wired too on a NUCLEO, USART output from ST-LINK?

[franck2]

Posted on November 21, 2014 at 19:42

Nucleo Scheme seems you're right...USART

________________

Attachments :

MB1136.pdf : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I14z&d=%2Fa%2F0X0000000bi1%2FEduQJZTz6YufThU84vKo9y22eZVjIjSr51VEWLWkq3E&asPdf=false

[Tesla DeLorean]

Posted on November 21, 2014 at 19:55

PA2 should be viable, it's not clashing with an output.

// STM32 PMW @4MHz (PA9) and @1MHz (PA2) STM32F3-Discovery - [e-mail]
/**************************************************************************************/
#include ''stm32f3_discovery.h''
#include ''stm32f30x.h''
/**************************************************************************************/
static void TIM_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
uint16_t TimerPeriod = 0;
uint16_t ChannelPulse = 0;
/* GPIOA & GPIOB Clocks enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/* GPIOA & GPIOB Configuration: Channel 3 (TIM2) and Channel 1 (TIM15) as alternate function push-pull */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_2; // TIM2_CH3 (PA9), TIM15_CH1 (PA2)
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_10); // TIM2 PA9 AF10
GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_9); // TIM15 PA2 AF9
/* Compute the value to be set in ARR regiter to generate signal frequency at 1MHz */
TimerPeriod = (SystemCoreClock / 1000000);
/* Compute CCR value to generate a duty cycle at 50% for channel */
ChannelPulse = (uint16_t) (((uint32_t) 5 * TimerPeriod) / 10);
/* Tim15 clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM15, ENABLE);
/* Time Base configuration */
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = TimerPeriod - 1;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM15, &TIM_TimeBaseStructure);
/* Channel Configuration in PWM mode - fully qualify TIM15 is special */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_Pulse = ChannelPulse;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; // Want the Positive
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable; // not the negative
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
TIM_OC1Init(TIM15, &TIM_OCInitStructure); // TIM15_CH1 - PA2
/* Tim15 counter enable */
TIM_Cmd(TIM15, ENABLE);
/* Tim15 Main Output Enable - TIM15 is special on STM32F3 */
TIM_CtrlPWMOutputs(TIM15, ENABLE);
/*----------------------------------------------------------------------- */
/* Compute the value to be set in ARR regiter to generate signal frequency at 4MHz */
TimerPeriod = (SystemCoreClock / 4000000);
/* Compute CCR value to generate a duty cycle at 50% for channel */
ChannelPulse = (uint16_t) (((uint32_t) 5 * TimerPeriod) / 10);
/* Tim2 clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 , ENABLE);
/* Time Base configuration */
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = TimerPeriod - 1;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
/* Channel Configuration in PWM mode */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_Pulse = ChannelPulse;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM_OC3Init(TIM2, &TIM_OCInitStructure); // TIM2_CH3 - PA9
/* Tim2 Counter Enable */
TIM_Cmd(TIM2, ENABLE);
}
/**************************************************************************************/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f30x.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f30x.c file
*/
/* TIM Configuration */
TIM_Config();
/* Infinite loop */
while (1);
}
/**************************************************************************************/
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf(''Wrong parameters value: file %s on line %d

'', file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif

[franck2]

Posted on November 21, 2014 at 20:07

Mad...Still dead!

So I'll try with TIM1_CH1. At first I didn't want to use it, being a powerful one....but it's friday....so....No way!

[franck2]

Posted on November 21, 2014 at 20:20

I should do something wrong as I didn't get any PMW either with Timer15, or even now Timer1. Scope is ok. Probe also. I've checked probe channel 2.

So it must be something obvious....

[franck2]

Posted on November 21, 2014 at 20:23

My new code program with Timer 1 CH1 and what the scope gave me:

// STM32 PMW @4MHz (PA9) and @1MHz (PA2)

/**************************************************************************************/

#include ''stm32f30x.h''

/**************************************************************************************/

static void TIM_Config(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

TIM_OCInitTypeDef TIM_OCInitStructure;

uint16_t TimerPeriod = 0;

uint16_t ChannelPulse = 0;

/* GPIOA & GPIOC Clocks enable */

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOC, ENABLE);

/* GPIOA & GPIOC Configuration: Channel 3 (TIM2) and Channel 1 (TIM1) as alternate function push-pull */

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 ; // TIM2_CH3 (PA9)

GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_10); // TIM2 PA9 AF10

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 ; // TIM1_CH1 (PC0)

GPIO_Init(GPIOC, &GPIO_InitStructure);

GPIO_PinAFConfig(GPIOC, GPIO_PinSource2, GPIO_AF_2); // TIM1 PC0 AF2

/* Compute the value to be set in ARR regiter to generate signal frequency at 1MHz */

TimerPeriod = (SystemCoreClock / 1000000);

/* Compute CCR value to generate a duty cycle at 50% for channel */

ChannelPulse = (uint16_t) (((uint32_t) 5 * TimerPeriod) / 10);

/* Tim15 clock enable */

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

/* Time Base configuration */

TIM_TimeBaseStructure.TIM_Prescaler = 0;

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

TIM_TimeBaseStructure.TIM_Period = TimerPeriod - 1;

TIM_TimeBaseStructure.TIM_ClockDivision = 0;

TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;

TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

/* Channel Configuration in PWM mode - */

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;

TIM_OCInitStructure.TIM_Pulse = ChannelPulse;

TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; // Want the Positive

TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable; // not the negative

TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_High;

TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;

TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;

TIM_OC1Init(TIM1, &TIM_OCInitStructure); // TIM1_CH1 - PC0

/* Tim15 counter enable */

TIM_Cmd(TIM1, ENABLE);

/*----------------------------------------------------------------------- */

/* Compute the value to be set in ARR regiter to generate signal frequency at 4MHz */

TimerPeriod = (SystemCoreClock / 4000000);

/* Compute CCR value to generate a duty cycle at 50% for channel */

ChannelPulse = (uint16_t) (((uint32_t) 5 * TimerPeriod) / 10);

/* Tim2 clock enable */

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 , ENABLE);

/* Time Base configuration */

TIM_TimeBaseStructure.TIM_Prescaler = 0;

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

TIM_TimeBaseStructure.TIM_Period = TimerPeriod - 1;

TIM_TimeBaseStructure.TIM_ClockDivision = 0;

TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;

TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

/* Channel Configuration in PWM mode */

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;

TIM_OCInitStructure.TIM_Pulse = ChannelPulse;

TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;

TIM_OC3Init(TIM2, &TIM_OCInitStructure); // TIM2_CH3 - PA9

/* Tim2 Counter Enable */

TIM_Cmd(TIM2, ENABLE);

}

/**************************************************************************************/

int main(void)

{

/*!< At this stage the microcontroller clock setting is already configured,

this is done through SystemInit() function which is called from startup

file (startup_stm32f30x.s) before to branch to application main.

To reconfigure the default setting of SystemInit() function, refer to

system_stm32f30x.c file

*/

/* TIM Configuration */

TIM_Config();

/* Infinite loop */

while (1);

}

/**************************************************************************************/

#ifdef USE_FULL_ASSERT

/**

* @brief Reports the name of the source file and the source line number

* where the assert_param error has occurred.

* @param file: pointer to the source file name

* @param line: assert_param error line source number

* @retval None

*/

void assert_failed(uint8_t* file, uint32_t line)

{

/* User can add his own implementation to report the file name and line number,

ex: printf(''Wrong parameters value: file %s on line %d\r\n'', file, line) */

/* Infinite loop */

while (1)

{

}

}

#endif

________________

Attachments :

Screen_2014-11-21_08-22-44.jpeg : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I14k&d=%2Fa%2F0X0000000bhy%2F.0fXpGd0u86TaaaGCBmJjorPSurDQKiav92Bpymdo6Y&asPdf=false

[Tesla DeLorean]

Posted on November 21, 2014 at 21:07

 GPIO_PinAFConfig(GPIOC, GPIO_PinSource2, GPIO_AF_2); // TIM1 PC0 AF2

Should be GPIO_PinSource0, but the datasheet I'm looking at doesn't show it connecting to TIM1