regarding spi communication

[manikandan]

hello,

i am using nrf52840 in our customised board and trying to interface it with  GDEW0213Z16 2.13 inch display which uses spi communication i have added the necessary api"s and changed the pin configuration according to my board but while running my code  i am nrfbreak point error in this section

nrfx_err_t nrfx_spim_xfer(nrfx_spim_t const * const p_instance,
nrfx_spim_xfer_desc_t const * p_xfer_desc,
uint32_t flags)
{
spim_control_block_t * p_cb = &m_cb[p_instance->drv_inst_idx];
NRFX_ASSERT(p_cb->state != NRFX_DRV_STATE_UNINITIALIZED);
NRFX_ASSERT(p_xfer_desc->p_tx_buffer != NULL || p_xfer_desc->tx_length == 0);
NRFX_ASSERT(p_xfer_desc->p_rx_buffer != NULL || p_xfer_desc->rx_length == 0);
NRFX_ASSERT(SPIM_LENGTH_VALIDATE(p_instance->drv_inst_idx,
p_xfer_desc->rx_length,
p_xfer_desc->tx_length));

can anyone tell me how can i resolve this issue

thanks and regards

manikandan v

[awneil]

manikandan said:

i am nrfbreak point error in this section

So where, exactly, is that happening?

Presumably, one of those ASSERTs?

So step through it in the debugger to see which one is failing, and why.

[manikandan]

hello,

in first assert itself it is failing and i cant find the reason can you do any help regarding this?

thanks and regards

manikandan v

[awneil]

The use of ASSERT is a standard programming practice - nothing specific to nRF52 or Nordic:

https://www.google.com/search?q=assert+c+programming

manikandan said:

first assert itself it is failing

So this:

manikandan said:

NRFX_ASSERT(p_cb->state != NRFX_DRV_STATE_UNINITIALIZED);

This ASSERT will fail wen the state is NRFX_DRV_STATE_UNINITIALIZED

So you haven't initialised the SPI.

You need to initialise the SPI before you use it!

[manikandan]

thanks for your reply

[00:00:00.000,000] <error> app: ASSERTION FAILED at C:\folder\nRF5_SDK_15.0.0_a53641a\modules\nrfx\drivers\src\nrfx_spim.c:548

this is the error i am getting while debugging

in sdk for spi i have enabled the following things

NRFX_SPI_ENABLED 1

 NRFX_SPI0_ENABLED 1

SPI_ENABLED 1

NRFX_SPIM_ENABLED 1

NRFX_SPIM0_ENABLED 1

SPI0_ENABLED 1

other than this what should i enable for spi communication??can you help me with this

thanks and regards

manikandan v

[awneil]

manikandan said:

what should i enable for spi communication??

Those are just compile-time definitions to include SPI support in your code.

You need to actually initialise the SPI hardware at run time.

Take a look at the SDK documentation & examples - there will be a function call to initialise the SPI hardware.

[manikandan]

ya that function call is epd init() in my case and i have intialised it in my main

thanks and regards 

manikandan v

[awneil]

clearly it hasn't worked - because the ASSERT tells you that it is not initialised.