ercircle 发表于 2024-11-21 22:55:13

QSPI阻塞问题定位

本帖最后由 ercircle 于 2024-11-21 22:55 编辑

问题背景：
测试Ai8051U 实验箱例程包72.4例程，C51环境下

问题现象：
flash编程数据超过4Byte时阻塞在QSPI_WRITE_INSTR_SADDR24_SDATA函数QSPI_CheckTransfer循环中

定位过程：
简单粗暴加日志打印：



调试过程中发现，在以下代码段中添加打印或者加NOP(12)则不会阻塞
    while (datalen)
    {
      QSPI_WriteData(*pdat);      //写数据到FIFO中
      pdat++;
      datalen--;
                        //printf("FIFOLevel:%bd , 0x%02bx\n",QSPI_CheckFIFOLevel()                ,QSPI_CheckFIFOLevel()                );
                        //NOP(12);
    }
为什么FIFO为空但是一直处于BUSY状态，不懂，发帖请教下，请大佬指点下，谢谢~



触发流程：
下载hex后，给串口助手发送以下flash编程报文触发：
41 49 43 F3 00 00 00 00 00 00 01 00 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

测试工程：


ercircle 发表于 2024-11-21 23:59:57

加延时虽然不阻塞了，但是从W25Q128回读的数据对不上。读取函数里加NOP没变化




测试报文：
写：
41 49 43 F3 00 00 00 00 00 00 01 00 46 41 54 00 00 00 00 0D 00 00 01 00 00 02 59 00 00 04 B1 00 00 07 09 00 00 09 61 00 00 0B B9 00 00 0E 11 00 00 10 69 00 00 12 C1 00 00 15 19 00 00 17 71 00 00 19 C9 00 00 1C 21 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

读：
41 49 43 F2 00 00 00 00 00 00 01 00

测试工程：

ercircle 发表于 2024-11-22 00:28:01

ercircle 发表于 2024-11-21 23:59
加延时虽然不阻塞了，但是从W25Q128回读的数据对不上。读取函数里加NOP没变化




2楼问题是没先发清除指令41 49 43 F5 00 00 00 00
只剩延时问题

DebugLab 发表于 2024-11-26 12:31:19


传输8字节测试没有发现阻塞的问题




DebugLab 发表于 2024-11-26 12:34:51

DebugLab 发表于 2024-11-26 12:31
传输8字节测试没有发现阻塞的问题

使用C251模式测试
建议使用C251模式

ercircle 发表于 2024-11-26 23:07:06

{:4_196:}{:4_196:}感谢超版回复
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