Other Parts Discussed in Thread: HALCOGEN
你好，我在使用TMS570lc457芯片通过emac模块收发数据。在测试的过程中发现在初始化后一段时间内收发都正常，但是在通道0的接收缓存区计数寄存器计数到0x000000CD后再发送数据不再进入接收中断。（我使用通道0来接收数据并使能了中断）同时发送功能始终正常。您能帮我分析一下为什么emac模块不再中断接收吗？
如图：
我的接收中断函数如下：
#pragma INTERRUPT(EMACCore0RxIsr, IRQ)
uint32 countrxisr = 0;
void EMACCore0RxIsr(void)
{
char* tmpptr;
uint32_t CurFinishCP = HWREG(EMAC_BASE + EMAC_RXCP(0)); /*当前已经完成数据接收的缓冲区指针*/
EMACDesc_t* RXCP = EMAC_SL_CurRXCP;/*当前处理的接收缓冲区指针*/
MACFrame_t* MacFramePtr = NULL;
ECTRL_C0RXEN = 0U; /*在处理数据之前先禁用中断*/
HWREG(EMAC_BASE + EMAC_RXCP(0)) = CurFinishCP; /*确认当前已经处理过的CP*/
HWREG(EMAC_BASE + EMAC_MACEOIVECTOR) = 1U; /*确认接收中断处理完毕*/
if ( countrxisr == 0U ) //first frame
{
HWREG(EMAC_BASE + EMAC_RXHDP(0)) = CurFinishCP;
EMAC_SL_CurRXCP = (EMACDesc_t*)CurFinishCP;
RXCP = (EMACDesc_t*)CurFinishCP;
countrxisr = 1;
}/*当前接收队列已经到达队尾，重新将接收缓存区指针指向首位置*/
else if (HWREG(EMAC_BASE + EMAC_RXHDP(0)) == 0U)
{
HWREG(EMAC_BASE + EMAC_RXHDP(0)) = CurFinishCP;
EMAC_SL_CurRXCP = (EMACDesc_t*)CurFinishCP;
RXCP = (EMACDesc_t*)CurFinishCP;
}/*当前接收队列已经到达队尾，重新将接收缓存区指针指向首位置*/
else
{
EMAC_SL_CurRXCP = ((EMACDesc_t*)(CurFinishCP)) + 1U;
EMAC_SL_CurRXCP = (EMACDesc_t*)((char*)EMAC_SL_CurRXCP + 4); /* appear 4 byte more data than 3137,so add this offsets */
}/*更新最后一次处理的CP*/
while ( (uint32_t)(RXCP) <= CurFinishCP )
{
/*1============================================================================1*/
/*仅处理单包数据包，对于拆分的数据包直接丢弃*/
if ( (RXCP->EOP == 1U) && (RXCP->SOP == 1U) )
{
MacFramePtr = (MACFrame_t*)EMACSwizzleData((uint32)RXCP->BufferPtr); /*MAC层数据帧信息指针*/
switch ( MacFramePtr->FrameType )
{
case IPV4_DT_ARP_FRAME :
{
if ( EMACSwizzleData16(RXCP->Length) <= sizeof EMAC_SL_RXBuffer.Data[0].Buffer )
{
memcpy(EMAC_SL_RXBuffer.Data[EMAC_SL_RXBuffer.Tail.Cnt].Buffer, EMACSwizzleData(RXCP->BufferPtr),EMACSwizzleData16(RXCP->Length));
EMAC_SL_RXBuffer.Tail.Cnt++;
}
break;
}/*接收到ARP数据帧，先将数据存放到接收缓冲区中，稍候再处理*/
case IPV4_DT_IP_FRAME :
{
IPHeader_t* IPHeaderPtr = (IPHeader_t*)(EMACSwizzleData(RXCP->BufferPtr) + 14U); /*当前数据包的IP头信息*/
if ( (IPHeaderPtr->SrcIP == REMOTE_IP_ADDR) && ((IPHeaderPtr->DstIP == LOCAL_IP_ADDR)||(IPHeaderPtr->DstIP == BROADCAST_IP_ADDR))&& (IPHeaderPtr->Protol == IP_PROTO_UDP) )
{
EMAC_SL_IsRXRemoteUDPData = TRUE;
if ( EMACSwizzleData16(RXCP->Length) <= sizeof EMAC_SL_RXBuffer.Data[0].Buffer )
{
memcpy(EMAC_SL_RXBuffer.Data[EMAC_SL_RXBuffer.Tail.Cnt].Buffer, EMACSwizzleData(RXCP->BufferPtr), EMACSwizzleData16(RXCP->Length));
EMAC_SL_RXBuffer.Tail.Cnt++;
}
}/*接收IP地址与本地IP地址匹配，且数据类型为UDP，则处理数据帧*/
break;
}/*接收到IP数据帧，先将数据存放到接收缓冲区中，稍候再处理*/
default :
{
break;
}
}
}
/*1============================================================================1*/
RXCP->Length = RX_BUFFER_SIZE;
RXCP->OWNER = 1U;
RXCP++;
RXCP = (char*)RXCP + 4; /* here don't know why data in buffer is 32* 5 byte while 3137 is 32 *4 byte, perhaps because of LWIP protocol */
}
ECTRL_C0RXEN = 1U; /*重新激活中断*/
}
我的LWIP的初始化函数是这样写的：
void EMAC_LwIP_init (uint8_t * macAddress)
{
unsigned int ipAddr;
uint32 emacCtrlBase = 0xFCF78800U;
uint32 emacBase = 0xFCF78000U;
EMACInit(emacCtrlBase,emacBase);
IntMasterIRQEnable();//中断
/* for static IP address. Change address as required, and uncomment the previous statement. */
uint8 ip_addr[4] = { 172, 22, 1, 1 };
uint8 netmask[4] = { 255, 255, 255, 0 };
uint8 gateway[4] = { 172, 22, 1, 1 }; //网关 路由器端口
ipAddr = lwIPInit(0, macAddress,
*((uint32_t *)ip_addr),
*((uint32_t *)netmask),
*((uint32_t *)gateway),
IPADDR_USE_STATIC );
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