STM32F103 Minuteur remappage de fonction

Question

J'expérimente avec du code générateur VGA par Artekit, au https://www.artekit.eu/vga-output-using-a-36-pin-stm32/. Ce code génère un signal PWM pour HSYNC en utilisant le canal TIM2 2, qui est sorti sur le port PA1. Tout cela fonctionne correctement. Maintenant, je voudrais remapper TIM2 de sorte que le signal PWM est remappé sur la broche PB3. Après avoir appelé GPIO_PinRemapConfig(GPIO_FullRemap_TIM2, ENABLE), le signal PWM n'apparaît plus sur PA1 mais n'apparaît pas sur PB3 bien que toutes les interruptions de minuterie continuent à fonctionner normalement. Qu'est-ce que je rate?

configuration RCC est la suivante:

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); 
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); 
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_SPI1 | RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE); 

code correspondant est ci-dessous.

GPIO_InitTypeDef GPIO_InitStructure; 
NVIC_InitTypeDef nvic; 
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; 
TIM_OCInitTypeDef TIM_OCInitStructure; 
u32 TimerPeriod = 0; 
u16 Channel1Pulse = 0, Channel2Pulse = 0, Channel3Pulse = 0; 

// Remap PA1 -> PB3 
GPIO_PinRemapConfig(GPIO_FullRemap_TIM2, ENABLE); 

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; 
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; 
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz; 
GPIO_Init(GPIOA, &GPIO_InitStructure); 

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; 
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; 
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz; 
GPIO_Init(GPIOB, &GPIO_InitStructure); 

TimerPeriod = 2048; 
Channel1Pulse = 144;  /* HSYNC */ 
Channel2Pulse = 352;   /* HSYNC + BACK PORCH */ 

TIM_TimeBaseStructure.TIM_Prescaler = 0; 
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; 
TIM_TimeBaseStructure.TIM_Period = TimerPeriod; 
TIM_TimeBaseStructure.TIM_ClockDivision = 0; 
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; 
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); 

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; 
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; 
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; 
TIM_OCInitStructure.TIM_Pulse = Channel1Pulse; 
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; 
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; 
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset; 
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Set; 

TIM_OC1Init(TIM1, &TIM_OCInitStructure); 

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Inactive; 
TIM_OCInitStructure.TIM_Pulse = Channel2Pulse; 
TIM_OC2Init(TIM1, &TIM_OCInitStructure); 

/* TIM1 counter enable and output enable */ 
TIM_CtrlPWMOutputs(TIM1, ENABLE); 

/* Select TIM1 as Master */ 
TIM_SelectMasterSlaveMode(TIM1, TIM_MasterSlaveMode_Enable); 
TIM_SelectOutputTrigger(TIM1, TIM_TRGOSource_Update); 

TIM_SelectSlaveMode(TIM2, TIM_SlaveMode_Gated); 
TIM_SelectInputTrigger(TIM2, TIM_TS_ITR0); 

TimerPeriod = 625;  /* Vertical lines */ 
Channel2Pulse = 2;  /* Sync pulse */ 
Channel3Pulse = 24;  /* Sync pulse + Back porch */ 
TIM_TimeBaseStructure.TIM_Prescaler = 0; 
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; 
TIM_TimeBaseStructure.TIM_Period = TimerPeriod; 
TIM_TimeBaseStructure.TIM_ClockDivision = 0; 
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; 

TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); 

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; 
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; 
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; 
TIM_OCInitStructure.TIM_Pulse = Channel2Pulse; 
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; 
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; 
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset; 
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Set; 
TIM_OC2Init(TIM2, &TIM_OCInitStructure); 

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Inactive; 
TIM_OCInitStructure.TIM_Pulse = Channel3Pulse; 
TIM_OC3Init(TIM2, &TIM_OCInitStructure); 

/* TIM2 counter enable and output enable */ 
TIM_CtrlPWMOutputs(TIM2, ENABLE); 

/* Interrupt TIM2 */ 
nvic.NVIC_IRQChannel = TIM2_IRQn; 
nvic.NVIC_IRQChannelPreemptionPriority = 1; 
nvic.NVIC_IRQChannelSubPriority = 0; 
nvic.NVIC_IRQChannelCmd = ENABLE; 

NVIC_Init(&nvic); 
TIM_ITConfig(TIM2, TIM_IT_CC3, ENABLE); 

/* Interrupt TIM1 */ 
nvic.NVIC_IRQChannel = TIM1_CC_IRQn; 
nvic.NVIC_IRQChannelPreemptionPriority = 1; 
nvic.NVIC_IRQChannelSubPriority = 0; 
nvic.NVIC_IRQChannelCmd = ENABLE; 

NVIC_Init(&nvic); 
TIM_ITConfig(TIM1, TIM_IT_CC2, ENABLE); 

TIM_Cmd(TIM2, ENABLE); 
TIM_Cmd(TIM1, ENABLE); 

Answer 1

Merci @old_timer, ça m'a mis sur la bonne voie. SWO est activé par défaut, qui est sur PB3 et doit être désactivé.

GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE); 
GPIO_PinRemapConfig(GPIO_FullRemap_TIM2, ENABLE); 

fait l'affaire. Les deux remappages doivent être faits séparément, leur combinaison ne fonctionne pas.