在OCRAM 和DRAM中使用DAM传输数据异常

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在OCRAM 和DRAM中使用DAM传输数据异常

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Contributor I

在使用SDK_2.6.0_EVK-MIMXRT1010_ALL_2\boards\evkmimxrt1010\driver_examples\edma\memory_to_memory中的例子 

AT_NONCACHEABLE_SECTION_INIT(uint32_t srcAddr[BUFF_LENGTH]) = {0x01, 0x02, 0x03, 0x04};
AT_NONCACHEABLE_SECTION_INIT(uint32_t destAddr[BUFF_LENGTH]) = {0x00, 0x00, 0x00, 0x00};

改为

uint32_t srcAddr[BUFF_LENGTH] = {0x01, 0x02, 0x03, 0x04};
uint32_t destAddr[BUFF_LENGTH] = {0x00, 0x00, 0x00, 0x00};

   RW_m_data2 m_data2_start m_data2_size { ; RW data
            .ANY (+RW +ZI)
   }
   RW_m_ncache +0 EMPTY 0 {
   }
   RW_m_ncache_unused +0 EMPTY m_data2_size-ImageLength(RW_m_data2)-ImageLength(RW_m_ncache) { ;          Empty region added for MPU configuration
   }

srcAddr 和destAddr 的地址定位到OCRAM中

此时destAddr 接收的数据全是是0 ,

请问OCRAM 地址怎么使用DAM 正常收发数据

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NXP TechSupport
NXP TechSupport

Hi,

Thank you for your interest in NXP Semiconductor products and
for the opportunity to serve you.
To provide the fastest possible support, I'd highly recommend you to refer to the Cache maintenance by application section in the application note:
https://www.nxp.com/docs/en/application-note/AN12042.pdf for details.

Have a great day,
TIC

 

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