Method for putting EasyDMA buffer into Data RAM

[SmallerPond]

I originally posted this question in the community forum, but I think now that it fits here better.  I won't repeat everything since you can see the details in the community forum link, but I'm getting an error that my rx buffer isn't in the Data RAM - which is fine, but how am I meant to get it in the right spot?  I've tried a variety of things (again see the link) but to no avail.  Is there an example of NRFX_SPIM transfer/receive that I can reference?  I don't see one.

[hmolesworth]

How is the buffer defined? Unless prefixed with "const" or specifically directed to a section it will not be anywhere other than data RAM. Here are some examples where the buffers are in RAM:

void someFunction1(blah)
{
  uint8_t TxBuf[2] = {0x80|LIS2DH12_WHO_AM_I, 0x00};
  uint8_t RxBuf[2];
  blah blah
}

void someFunction2(blah)
{
  static uint8_t TxBuf[2] = {0x80|LIS2DH12_WHO_AM_I, 0x00};
  static uint8_t RxBuf[2];
  blah blah
}

static uint8_t TxBuf[2] = {0x80|LIS2DH12_WHO_AM_I, 0x00};
static uint8_t RxBuf[2];
void someFunction3(blah)
{
  blah blah
}

These are examples where the buffers are in Flash, and will generate an error:

const static uint8_t TxBuf[2] = {0x80|LIS2DH12_WHO_AM_I, 0x00};
const static uint8_t RxBuf[2];
void someFunction4(blah)
{
  blah blah
}

void someFunction5(blah)
{
  uint8_t const TxBuf[2] = {0x80|LIS2DH12_WHO_AM_I, 0x00};
  uint8_t const RxBuf[2];
  blah blah
}

Searching the .map file will give a named buffer's location; maybe post the code where the buffers are defined.

[SmallerPond]

Thank you!  I wasn't even thinking that this could be referencing the tx buffer (which I had as const), I mistaken figured it was only referencing the rx buffer - although it is clear that DMA will have to access some memory to send data...  Thanks for clearing it up for me.