H7的新版CMSIS-Driver以太网驱动全速94Mbps左右，比我之前修改的慢那么一丢丢

eric2013

V7配套的CMSIS-Driver驱动，将对下面的两个函数做个条件编译，可以选择官方的，也可以选择我修正的。

下面是官方的，速度94Mbps

1. /**
   
2.   \fn          int32_t ReadFrame (uint8_t *frame, uint32_t len)
   
3.   \brief       Read data of received Ethernet frame.
   
4.   \param[in]   frame  Pointer to frame buffer for data to read into
   
5.   \param[in]   len    Frame buffer length in bytes
   
6.   \return      number of data bytes read or execution status
   
7.                  - value >= 0: number of data bytes read
   
8.                  - value < 0: error occurred, value is execution status as defined with \ref execution_status
   
9. */
   
10. static int32_t ReadFrame (uint8_t *frame, uint32_t len) {
    
11. 
    
12.   if ((frame == NULL) && (len != 0U)) {
    
13.     /* Invalid parameters */
    
14.     return ARM_DRIVER_ERROR_PARAMETER;
    
15.   }
    
16. 
    
17.   if ((Emac.flags & EMAC_FLAG_POWER) == 0U) {
    
18.     /* Driver not yet powered */
    
19.     return ARM_DRIVER_ERROR;
    
20.   }
    
21. 
    
22.   if ((frame != NULL) && (Emac.rx_buf.buffer != NULL)) {
    
23.     memcpy (frame, Emac.rx_buf.buffer, len);
    
24.     Emac.rx_buf.buffer = NULL;
    
25.   }
    
26.   /* Return block back to EMAC-DMA */
    
27.   HAL_ETH_BuildRxDescriptors (Emac.h);
    
28. 
    
29.   return (len);
    
30. }
    
31. 
    
32. /**
    
33.   \fn          uint32_t GetRxFrameSize (void)
    
34.   \brief       Get size of received Ethernet frame.
    
35.   \return      number of bytes in received frame
    
36. */
    
37. static uint32_t GetRxFrameSize (void) {
    
38.   uint32_t len = 0;
    
39. 
    
40.   /* Clean and invalidate data cache */
    
41.   SCB_CleanInvalidateDCache();
    
42. 
    
43.   if(HAL_ETH_GetRxDataBuffer(Emac.h, &Emac.rx_buf) == HAL_OK) {
    
44.     if (HAL_ETH_GetRxDataLength (Emac.h, &len) == HAL_OK) {
    
45.       return (len);
    
46.     }
    
47.   }
    
48.   /* No data available */
    
49.   return (0);
    
50. }

复制代码

下面是我修改的，99Mbps

1. /**
   
2.   \fn          int32_t ReadFrame (uint8_t *frame, uint32_t len)
   
3.   \brief       Read data of received Ethernet frame.
   
4.   \param[in]   frame  Pointer to frame buffer for data to read into
   
5.   \param[in]   len    Frame buffer length in bytes
   
6.   \return      number of data bytes read or execution status
   
7.                  - value >= 0: number of data bytes read
   
8.                  - value < 0: error occurred, value is execution status as defined with \ref execution_status
   
9. */
   
10. ETH_BufferTypeDef rx_buf;
    
11. static int32_t ReadFrame (uint8_t *frame, uint32_t len) {
    
12. 
    
13.   if ((frame == NULL) && (len != 0U)) {
    
14.     /* Invalid parameters */
    
15.     return ARM_DRIVER_ERROR_PARAMETER;
    
16.   }
    
17. 
    
18.   if ((Emac.flags & EMAC_FLAG_POWER) == 0U) {
    
19.     /* Driver not yet powered */
    
20.     return ARM_DRIVER_ERROR;
    
21.   }
    
22.   
    
23.    if (frame != NULL) {
    
24.           SCB_CleanInvalidateDCache();
    
25.       memcpy (frame, rx_buf.buffer, len);
    
26.          
    
27.   }
    
28. 
    
29.   return (len);
    
30. }
    
31. 
    
32. /**
    
33.   \fn          uint32_t GetRxFrameSize (void)
    
34.   \brief       Get size of received Ethernet frame.
    
35.   \return      number of bytes in received frame
    
36. */
    
37. static uint32_t GetRxFrameSize (void) {
    
38.   uint32_t len;
    
39.         
    
40.   if(HAL_ETH_GetRxDataBuffer(Emac.h, &rx_buf) == HAL_OK)
    
41.   {
    
42.     HAL_ETH_GetRxDataLength(Emac.h, &len);
    
43. 
    
44.     /* Build Rx descriptor to be ready for next data reception */
    
45.     HAL_ETH_BuildRxDescriptors(Emac.h);
    
46.          
    
47.         return (len);
    
48.   }
    
49.   /* No data available */
    
50.   return (0);
    
51. }

复制代码

hpdell

貌似我还没有搞到这一步卧

挖东衣宇

&#160;&#160;/* Return block back to EMAC-DMA */
&#160;&#160;HAL_ETH_BuildRxDescriptors (Emac.h);

&#160;&#160;/* Clean and invalidate data cache */
&#160;&#160;SCB_CleanInvalidateDCache();

yenext

硬汉哥，咨询下，这个代码跑满速一帧数据是多少？如果一帧30byte，能到达这么高的传数速率？还有想问下是否测试过上位机下发到下位机，而后将数据返回。这个一个周期时间是多少吗？

eric2013

yenext 发表于 2019-10-12 10:49
硬汉哥，咨询下，这个代码跑满速一帧数据是多少？如果一帧30byte，能到达这么高的传数速率？还有想问下是否 ...

30字节的周期的话，使用这个小软件可以方便的测试速度

分享个ping专用小软件ATKKPing，非常不错
http://www.armbbs.cn/forum.php?mod=viewthread&tid=95181



下面是我刚刚的测试，设置30个字节，测试1万多次

younew

H7的网速确实很快啊。F4的网速不知道能达到多少啊？