STM32F407 乙太網 外部提供時鐘源的驅動修改錯誤總結
(1) 暈,不能放置圖片
示例程式碼中：
void ETH_GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable GPIOs clocks */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOB |
RCC_AHB1Periph_GPIOC | RCC_AHB1Periph_GPIOE |
RCC_AHB1Periph_GPIOG , ENABLE);
/* Enable SYSCFG clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* MII/RMII Media interface selection --------------------------------------*/
#ifdef MII_MODE
#ifdef PHY_CLOCK_MCO
/* Configure MCO (PA8) */
當不用MCU提供時鐘時,直接刪除該紅色部分程式碼導致網路不通
應該保留以下程式碼
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
後面的程式碼需要用到前面的相關配置. 沒注意到後面,直接刪掉了,導致出錯.
(2).乙太網配置網速貌似不太好使,強制為100M的方法:
void ETH_BSP_Config(void)
{
/* Configure the GPIO ports for ethernet pins */
ETH_GPIO_Config();
/* Config NVIC for Ethernet */
ETH_NVIC_Config();
/* Configure the Ethernet MAC/DMA */
ETH_MACDMA_Config();
if (EthInitStatus != 0)
{
printf("%s init failed! Err Num:%d.\n",__FUNCTION__,EthInitStatus);
//delay_ms(100);
}
/* Configure the PHY to generate an interrupt on change of link status */
//Eth_Link_PHYITConfig(DP83848_PHY_ADDRESS); //這裡
//ETH_InitStructure.ETH_AutoNegotiation = ETH_AutoNegotiation_Enable;//這裡
ETH_InitStructure.ETH_AutoNegotiation = ETH_AutoNegotiation_Disable;
ETH_InitStructure.ETH_Speed = ETH_Speed_100M;
ETH_InitStructure.ETH_Mode = ETH_Mode_FullDuplex;
OK.搞定