(参考手册RM0037)EDMA_ERQRL下有一节说
“在接受通道的硬件服务请求之前,必须先断言eDMA请求输入信号和此使能请求标志。”
但是除了''设置位1(CERQ [0])提供全局清除功能,强制EDMA_ERQRL的全部内容归零,禁用所有eDMA请求时,我找不到任何其他对“请求输入信号”的引用输入。“”
这表明它们是一回事?
如果没有,我是否应该做任何事情让它产生硬件请求?
(顺便说一下:我正试图通过DMA运行SPI,但无论有没有SPI代码,似乎都有完全相同的问题,所以我现在假设这是一个DMA问题)
以上来自于谷歌翻译
以下为原文
(Reference Manual RM0037) Has a section under EDMA_ERQRL saying
''Both the eDMA request input signal and this enable request flag must be asserted before a channel’s hardware service request is accepted.''
But I can't find any other references to a 'request input signal' other than ''Setting bit 1 (CERQ[0]) provides a global clear function, forcing the entire contents of the EDMA_ERQRL to be zeroed, disabling all eDMA request inputs.''
Which suggests that they are the same thing??
If not, should I have to do anything to let it produce Hardware requests?
(BTW: I'm trying to run SPI via DMA but seem to be having exactly the same issues both with and without the SPI code, so am currently assuming it's a DMA problem)
(参考手册RM0037)EDMA_ERQRL下有一节说
“在接受通道的硬件服务请求之前,必须先断言eDMA请求输入信号和此使能请求标志。”
但是除了''设置位1(CERQ [0])提供全局清除功能,强制EDMA_ERQRL的全部内容归零,禁用所有eDMA请求时,我找不到任何其他对“请求输入信号”的引用输入。“”
这表明它们是一回事?
如果没有,我是否应该做任何事情让它产生硬件请求?
(顺便说一下:我正试图通过DMA运行SPI,但无论有没有SPI代码,似乎都有完全相同的问题,所以我现在假设这是一个DMA问题)
以上来自于谷歌翻译
以下为原文
(Reference Manual RM0037) Has a section under EDMA_ERQRL saying
''Both the eDMA request input signal and this enable request flag must be asserted before a channel’s hardware service request is accepted.''
But I can't find any other references to a 'request input signal' other than ''Setting bit 1 (CERQ[0]) provides a global clear function, forcing the entire contents of the EDMA_ERQRL to be zeroed, disabling all eDMA request inputs.''
Which suggests that they are the same thing??
If not, should I have to do anything to let it produce Hardware requests?
(BTW: I'm trying to run SPI via DMA but seem to be having exactly the same issues both with and without the SPI code, so am currently assuming it's a DMA problem)
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