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better fix warning with "-Wclass-memaccess" in SPI

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This commit is contained in:
hathach 2021-05-24 21:31:52 +07:00
parent a7a8b02854
commit 51bd7a7967
1 changed files with 3 additions and 11 deletions
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14
libraries/SPI/SPI.cpp
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@ -333,24 +333,16 @@ void SPIClass::dmaAllocate(void) {
use_dma = true; // Everything allocated successfully
extraWriteDescriptors = &extraReadDescriptors[numReadDescriptors];
// dmac.h didn't include extern "C" which cause
// DmacDescriptor and its members are defined as C++ struct therefore
// memcpy will throw warning on copying where simple assignment won't work
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wclass-memaccess"
// Initialize descriptors (copy from first ones)
// cast to void* to suppress warning: with no trivial copy-assignment [-Wclass-memaccess]
for(int i=0; i<numReadDescriptors; i++) {
memcpy(&extraReadDescriptors[i], firstReadDescriptor,
memcpy((void*) &extraReadDescriptors[i], firstReadDescriptor,
sizeof(DmacDescriptor));
}
for(int i=0; i<numWriteDescriptors; i++) {
memcpy(&extraWriteDescriptors[i], firstWriteDescriptor,
memcpy((void*) &extraWriteDescriptors[i], firstWriteDescriptor,
sizeof(DmacDescriptor));
}
#pragma GCC diagnostic pop
} // end malloc
} // end extra descriptor check