先贴两段代码，第一段芯片是STM32F303ZET6：
- /**
- * [url=home.php?mod=space&uid=247401]@brief[/url] SPI1 Initialization Function
- * @param None
- * @retval None
- */
- static void MX_SPI1_Init(void)
- {
- /* USER CODE BEGIN SPI1_Init 0 */
- /* USER CODE END SPI1_Init 0 */
- /* USER CODE BEGIN SPI1_Init 1 */
- /* USER CODE END SPI1_Init 1 */
- /* SPI1 parameter configuration*/
- hspi1.Instance = SPI1;
- hspi1.Init.Mode = SPI_MODE_MASTER;
- hspi1.Init.Direction = SPI_DIRECTION_2LINES;
- hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
- hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
- hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
- hspi1.Init.NSS = SPI_NSS_SOFT;
- hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
- hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
- hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
- hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_ENABLE;
- hspi1.Init.CRCPolynomial = 7;
- hspi1.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
- hspi1.Init.NSSPMode = SPI_NSS_PULSE_ENABLE;
- if (HAL_SPI_Init(&hspi1) != HAL_OK)
- {
- Error_Handler();
- }
- /* USER CODE BEGIN SPI1_Init 2 */
- /* USER CODE END SPI1_Init 2 */
- }
- /**
- * @brief GPIO Initialization Function
- * @param None
- * @retval None
- */
- static void MX_GPIO_Init(void)
- {
- GPIO_InitTypeDef GPIO_InitStruct = {0};
- /* USER CODE BEGIN MX_GPIO_Init_1 */
- /* USER CODE END MX_GPIO_Init_1 */
- /* GPIO Ports Clock Enable */
- __HAL_RCC_GPIOA_CLK_ENABLE();
- __HAL_RCC_GPIOD_CLK_ENABLE();
- /*Configure GPIO pin Output Level */
- HAL_GPIO_WritePin(CS_GPIO_Port, CS_Pin, GPIO_PIN_SET);
- /*Configure GPIO pin Output Level */
- HAL_GPIO_WritePin(RST_GPIO_Port, RST_Pin, GPIO_PIN_SET);
- /*Configure GPIO pin : CS_Pin */
- GPIO_InitStruct.Pin = CS_Pin;
- GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
- GPIO_InitStruct.Pull = GPIO_NOPULL;
- GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
- HAL_GPIO_Init(CS_GPIO_Port, &GPIO_InitStruct);
- /*Configure GPIO pin : RST_Pin */
- GPIO_InitStruct.Pin = RST_Pin;
- GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
- GPIO_InitStruct.Pull = GPIO_NOPULL;
- GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
- HAL_GPIO_Init(RST_GPIO_Port, &GPIO_InitStruct);
- /* USER CODE BEGIN MX_GPIO_Init_2 */
- /* USER CODE END MX_GPIO_Init_2 */
- }
- /*******************************************************************************
- * 函数名 : SPI_Configuration
- * 描述 : W5500 SPI初始化配置(STM32 SPI1)
- * 输入 : 无
- * 输出 : 无
- * 返回值 : 无
- * 说明 : 无
- *******************************************************************************/
- void SPI_Configuration(void)
- {
- GPIO_InitTypeDef GPIO_InitStructure;
- SPI_InitTypeDef SPI_InitStructure;
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_SPI1 | RCC_APB2Periph_AFIO, ENABLE);
- /* 初始化SCK、MISO、MOSI引脚 */
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
- GPIO_SetBits(GPIOA,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);
- /* 初始化CS引脚 */
- GPIO_InitStructure.GPIO_Pin = W5500_SCS;
- GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
- GPIO_Init(W5500_SCS_PORT, &GPIO_InitStructure);
- GPIO_SetBits(W5500_SCS_PORT, W5500_SCS);
- /* 初始化配置STM32 SPI1 */
- SPI_InitStructure.SPI_Direction=SPI_Direction_2Lines_FullDuplex; //SPI设置为双线双向全双工
- SPI_InitStructure.SPI_Mode=SPI_Mode_Master; //设置为主SPI
- SPI_InitStructure.SPI_DataSize=SPI_DataSize_8b; //SPI发送接收8位帧结构
- SPI_InitStructure.SPI_CPOL=SPI_CPOL_Low; //时钟悬空低
- SPI_InitStructure.SPI_CPHA=SPI_CPHA_1Edge; //数据捕获于第1个时钟沿
- SPI_InitStructure.SPI_NSS=SPI_NSS_Soft; //NSS由外部管脚管理
- SPI_InitStructure.SPI_BaudRatePrescaler=SPI_BaudRatePrescaler_2; //波特率预分频值为2
- SPI_InitStructure.SPI_FirstBit=SPI_FirstBit_MSB; //数据传输从MSB位开始
- SPI_InitStructure.SPI_CRCPolynomial=7; //CRC多项式为7
- SPI_Init(SPI1,&SPI_InitStructure); //根据SPI_InitStruct中指定的参数初始化外设SPI1寄存器
- SPI_Cmd(SPI1,ENABLE); //STM32使能SPI1
- }
1.是不是STM32F303有SPI,I2C等功能时，不需要设置AFIO功能。
2.我看STM32标准库初始化硬件SPI时，把相应管教初始化为
GPIO_Mode_AF_PP，而自动生成的代码没有。是不需要初始化还是要自己添上？
谢谢！
| 
楼主
