CYUSB3014 GPIF写buffer出错

只看该作者 · 2016-10-24 20:19

Hello, I use GPIF state machine to transfer a sector (512 byte) when I start state machine every time. I set a PIB to USB DMA channel, and set 16 buffers, and every buffer is 1024KB. When I need to transfer more than 1 sector, I need to start state machine more than one time. However when after I start two times transaction, there emerges an error: “CYU3P_PIB_ERR_THR0_WR_OVERRUN” or “Write to DMA data thread which is not ready.” The picture is my GPIF state machine. I doubt that when I start a transaction, the old buffer is full, and the next buffer is not ready. And I set CyU3PBusyWait() to wait for the previous transaction been finished, But it is not work. I want to know why, and how to solve the problem.
Thank you and Best Regards!

只看该作者 · 2016-10-24 20:24

我用状态机进行数据传输，每次传送一个扇区（即512字节）。DMA通道设置是16个Buffer, 每个Buffer1024KB。当我需要传送多个扇区时，我就重复启动状态机，每当第三次是，就报错：“CYU3P_PIB_ERR_THR0_WR_OVERRUN” or “Write to DMA data thread which is not ready.”所以我怀疑是我多次启动状态机时，旧的Buffer写满了，新的Buffer还没准备好。所以我用了CyU3PBusyWait() API函数进行等待，但是无论我设置多长时间，还是报同样的错误。这是为啥呢？有没有大神知道怎么解决。