Posted on January 25, 2014 at 18:41Hi, I'm having a problem about remap timer2 pin.
For the circuit board I've designed, I use PA15&PB3 as timer2 ch1&ch2 so I have to remap them and I also use PB10&PB11 as Usart3 Txd and Rxd.
Then I found that Usart3 PB10&PB11 are not working because they also timer2 remap pin.
Is there any way to remap only timer2 ch1&ch2 pin to make PB10&11 work as Usart3 pin?
here's my current code on the remap part
void USART3_GPIO_Configuration(void){
GPIO_InitTypeDef GPIO_InitStructure;
// Configure USART3 Tx (PB10) as alternate function push-pull
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
// Configure USART3 Rx (PB11) as input floating
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
void Tim2_GPIO_Configuration(void){
GPIO_InitTypeDef GPIO_InitStructure;
// PA15 TIM2_CH1, PB3 TIM2_CH2
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOB, &GPIO_InitStructure);
//TIM2 remap
GPIO_PinRemapConfig( GPIO_FullRemap_TIM2, ENABLE );
}
#rtfm #stm32-timer-remap
