Posted on May 17, 2011 at 14:11 /******************************************************************************* * Function Name : GPIO_PinRemapConfig * Description : Changes the mapping of the specified pin. * Input : - GPIO_Remap: selects the pin to remap. * This parameter can be one of the following values: * - GPIO_Remap_SPI1 * - GPIO_Remap_I2C1 * - GPIO_Remap_USART1 * - GPIO_Remap_USART2 * - GPIO_PartialRemap_USART3 * - GPIO_FullRemap_USART3 * - GPIO_PartialRemap_TIM1 * - GPIO_FullRemap_TIM1 * - GPIO_PartialRemap1_TIM2 * - GPIO_PartialRemap2_TIM2 * - GPIO_FullRemap_TIM2 * - GPIO_PartialRemap_TIM3 * - GPIO_FullRemap_TIM3 * - GPIO_Remap_TIM4 * - GPIO_Remap1_CAN * - GPIO_Remap2_CAN * - GPIO_Remap_PD01 * - GPIO_Remap_TIM5CH4_LSI * - GPIO_Remap_ADC1_ETRGINJ * - GPIO_Remap_ADC1_ETRGREG * - GPIO_Remap_ADC2_ETRGINJ * - GPIO_Remap_ADC2_ETRGREG * - GPIO_Remap_SWJ_NoJTRST * - GPIO_Remap_SWJ_JTAGDisable * - GPIO_Remap_SWJ_Disable * - NewState: new state of the port pin remapping. * This parameter can be: ENABLE or DISABLE. * Output : None * Return : None *******************************************************************************/ So to use the remap colum of one pin we must do:GPIO_PinRemapConfig(GPIO_Remap_I2C1, ENABLE); and only with that the pins PB8 and PB9 gets configured?? Must we configure the pin PB8 and PB9 like alternate function?? So to configure: PB8 = I2C1_SCL PB9 = I2C1_SDA PD0 = CAN_RX PD1 = CAN_TX PB1 = ADC12_IN9 Is the following code correct?
ONLY PINS CONFIGURATION
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
/*--------------------------------------------------------------------------------- PD.0 / PD.1-------- */ GPIO_PinRemapConfig(GPIO_Remap1_CAN,ENABLE); // THAT OR THE FOLLOWING? GPIO_PinRemapConfig(GPIO_Remap2_CAN,ENABLE); /* --- Configure CAN pin: RX ---------------- */GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_Init(GPIOD, &GPIO_InitStructure); /* --- Configure CAN pin: TX ---------------- */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOD, &GPIO_InitStructure);
/*--------------------------------------------------------------------------------- PB.0 / PB.09 -------- */ GPIO_PinRemapConfig(GPIO_Remap_I2C1,ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD; GPIO_Init(GPIOB, &GPIO_InitStructure); /*----------------------------------------------------------------------------------------------- PB.01 ----- */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; /* PB.01 ADC CHANNEL 9 */ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; /* ANALOG INPUT */ GPIO_Init(GPIOC, &GPIO_InitStructure); /*--------------------------------------------------------------------------------------------------------------- */ FOLLOW THE NEXT FIGURE
