使用的是M487开发板，把官网给的EMAC_TxRx例程烧录，然后接入网线到以太网接口，以太网旁边的灯是亮的，但过了一段时间以太网的灯灭了，ping IP也不成功，我连代码都没修改，刚开始也能获取到IP，这不懂是啥原因了，是代码问题还是以太网的接口有问题
void EMAC_TX_IRQHandler(void)
{
// Clean up Tx resource occupied by previous sent packet(s)
EMAC_SendPktDone();
}
/**
* @brief EMAC Rx interrupt handler.
* @param None
* @return None
*/
void EMAC_RX_IRQHandler(void)
{
int i=0;
while(1)
{
printf("u32PktLen =%d\r\n",u32PktLen);
// Check if there's any packets available
if(EMAC_RecvPkt(auPkt, &u32PktLen) == 0)
break;
// Process receive packet
process_rx_packet(auPkt, u32PktLen);
for(i=0;i<u32PktLen;i++)
{
if(auPkt==192)
{
printf("IP address: %d.%d.%d.%d\n", auPkt, auPkt[i+1],auPkt[i+2], auPkt[i+3]);
}
}
// Clean up Rx resource occupied by previous received packet
EMAC_RecvPktDone();
}
}
void SYS_Init(void)
{
/* Unlock protected registers */
SYS_UnlockReg();
/* Set XT1_OUT(PF.2) and XT1_IN(PF.3) to input mode */
PF->MODE &= ~(GPIO_MODE_MODE2_Msk | GPIO_MODE_MODE3_Msk);
/* Enable External XTAL (4~24 MHz) */
CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk);
/* Waiting for 12MHz clock ready */
CLK_WaitClockReady( CLK_STATUS_HXTSTB_Msk);
/* Switch HCLK clock source to HXT */
CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HXT,CLK_CLKDIV0_HCLK(1));
/* Set core clock as PLL_CLOCK from PLL */
CLK_SetCoreClock(FREQ_192MHZ);
/* Set both PCLK0 and PCLK1 as HCLK/2 */
CLK->PCLKDIV = CLK_PCLKDIV_APB0DIV_DIV2 | CLK_PCLKDIV_APB1DIV_DIV2;
/* Enable IP clock */
CLK_EnableModuleClock(UART0_MODULE);
CLK_EnableModuleClock(EMAC_MODULE);
/* Select IP clock source */
CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART0SEL_HXT, CLK_CLKDIV0_UART0(1));
// Configure MDC clock rate to HCLK / (127 + 1) = 1.5 MHz if system is running at 192 MHz
CLK_SetModuleClock(EMAC_MODULE, 0, CLK_CLKDIV3_EMAC(127));
/* Update System Core Clock */
/* User can use SystemCoreClockUpdate() to calculate SystemCoreClock. */
SystemCoreClockUpdate();
/* Set GPB multi-function pins for UART0 RXD and TXD */
SYS->GPB_MFPH &= ~(SYS_GPB_MFPH_PB12MFP_Msk | SYS_GPB_MFPH_PB13MFP_Msk);
SYS->GPB_MFPH |= (SYS_GPB_MFPH_PB12MFP_UART0_RXD | SYS_GPB_MFPH_PB13MFP_UART0_TXD);
// Configure RMII pins
SYS->GPA_MFPL |= SYS_GPA_MFPL_PA6MFP_EMAC_RMII_RXERR | SYS_GPA_MFPL_PA7MFP_EMAC_RMII_CRSDV;
SYS->GPC_MFPL |= SYS_GPC_MFPL_PC6MFP_EMAC_RMII_RXD1 | SYS_GPC_MFPL_PC7MFP_EMAC_RMII_RXD0;
SYS->GPC_MFPH |= SYS_GPC_MFPH_PC8MFP_EMAC_RMII_REFCLK;
SYS->GPE_MFPH |= SYS_GPE_MFPH_PE8MFP_EMAC_RMII_MDC |
SYS_GPE_MFPH_PE9MFP_EMAC_RMII_MDIO |
SYS_GPE_MFPH_PE10MFP_EMAC_RMII_TXD0 |
SYS_GPE_MFPH_PE11MFP_EMAC_RMII_TXD1 |
SYS_GPE_MFPH_PE12MFP_EMAC_RMII_TXEN;
// Enable high slew rate on all RMII TX output pins
PE->SLEWCTL = (GPIO_SLEWCTL_HIGH << GPIO_SLEWCTL_HSREN10_Pos) |
(GPIO_SLEWCTL_HIGH << GPIO_SLEWCTL_HSREN11_Pos) |
(GPIO_SLEWCTL_HIGH << GPIO_SLEWCTL_HSREN12_Pos);
/* Lock protected registers */
SYS_LockReg();
}
// This sample application can response to ICMP ECHO packets (ping)
// IP address is configure with DHCP, but if a lease cannot be acquired, a static IP will be used.
int main(void)
{
SYS_Init();
UART_Open(UART0, 115200);
Led_init();
key_init();
TIM_init();
// Select RMII interface by default
EMAC_Open(g_au8MacAddr);
// Init phy
EMAC_PhyInit();
NVIC_EnableIRQ(EMAC_TX_IRQn);
NVIC_EnableIRQ(EMAC_RX_IRQn);
EMAC_ENABLE_RX();
EMAC_ENABLE_TX();
printf("emaec enable rx dfksa \r\n");
// if (dhcp_start() < 0)
// {
// // Cannot get a DHCP lease, use static IP.
// printf("DHCP failed, use static IP 192.168.10.10\n");
// g_au8IpAddr[0] = 0xC0;
// g_au8IpAddr[1] = 0xA8;
// g_au8IpAddr[2] = 0x0A;
// g_au8IpAddr[3] = 0x0A;
// }
if (dhcp_start() > 0)
{
printf(" IP is %d.%d.%d.%d\n",g_au8IpAddr[0],g_au8IpAddr[1],g_au8IpAddr[2],g_au8IpAddr[3]);
}
while(1);
}
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