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Rx dummy cycles #20309

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5 changes: 5 additions & 0 deletions applications/sdp/mspi/src/hrt/hrt-nrf54l15.s
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Original file line number Diff line number Diff line change
Expand Up @@ -487,6 +487,11 @@ hrt_read:
li a2,0
addi a0,s0,20
call hrt_tx_rx.constprop.0
lbu a1,82(s0)
lhu a3,84(s0)
li a2,0
addi a0,s0,40
call hrt_tx_rx.constprop.0
li a5,0
.L57:
lw a4,64(s0)
Expand Down
7 changes: 6 additions & 1 deletion applications/sdp/mspi/src/hrt/hrt.c
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,7 @@

#define SPI_INPUT_PIN_NUM 2
#define CNT1_INIT_VALUE 1
#define MSB_MASK (0xff000000)
#define MSB_MASK (0xff000000)

#define INPUT_SHIFT_COUNT (BITS_IN_WORD - BITS_IN_BYTE)

Expand Down Expand Up @@ -314,6 +314,11 @@ void hrt_read(volatile hrt_xfer_t *hrt_xfer_params)
hrt_tx_rx(&hrt_xfer_params->xfer_data[HRT_FE_ADDRESS], hrt_xfer_params->bus_widths.address,
false, hrt_xfer_params->counter_value, CNT1_INIT_VALUE);

/* Transfer dummy_cycles */
hrt_tx_rx(&hrt_xfer_params->xfer_data[HRT_FE_DUMMY_CYCLES],
hrt_xfer_params->bus_widths.dummy_cycles, false, hrt_xfer_params->counter_value,
CNT1_INIT_VALUE);

for (uint32_t i = 0; i < hrt_xfer_params->xfer_data[HRT_FE_DATA].word_count; i++) {
hrt_xfer_params->xfer_data[HRT_FE_DATA].data[i] =
nrf_vpr_csr_vio_in_buffered_reversed_byte_get() >> INPUT_SHIFT_COUNT;
Expand Down
15 changes: 15 additions & 0 deletions applications/sdp/mspi/src/main.c
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Expand Up @@ -28,6 +28,8 @@

#define MAX_SHIFT_COUNT 63

#define DUMMY_CYCLES_DATA 0x00000000

#define CE_PIN_UNUSED UINT8_MAX

#define HRT_IRQ_PRIORITY 2
Expand Down Expand Up @@ -260,9 +262,15 @@ static void xfer_execute(nrfe_mspi_xfer_packet_msg_t *xfer_packet)

void prepare_and_read_data(nrfe_mspi_xfer_packet_msg_t *xfer_packet, volatile uint8_t *buffer)
{
/* TODO: rx_dummy*bus_width must be divisible by 8, remove when SHIFTCNTB changing is done.
*/
NRFX_ASSERT((nrfe_mspi_xfer_config_ptr->rx_dummy * xfer_params.bus_widths.dummy_cycles %
8) == 0);

volatile nrfe_mspi_dev_config_t *device =
&nrfe_mspi_devices[nrfe_mspi_xfer_config_ptr->device_index];
nrf_vpr_csr_vio_config_t config;
uint32_t dummy_cycles_data = DUMMY_CYCLES_DATA;

xfer_params.counter_value = 4;
xfer_params.ce_vio = ce_vios[device->ce_index];
Expand Down Expand Up @@ -298,6 +306,13 @@ void prepare_and_read_data(nrfe_mspi_xfer_packet_msg_t *xfer_packet, volatile ui
xfer_params.xfer_data[HRT_FE_ADDRESS].word_count =
nrfe_mspi_xfer_config_ptr->address_length;

/* Configure dummy_cycles phase. */
xfer_params.xfer_data[HRT_FE_DUMMY_CYCLES].fun_out = HRT_FUN_OUT_WORD;
xfer_params.xfer_data[HRT_FE_DUMMY_CYCLES].data = (uint8_t *)&dummy_cycles_data;
xfer_params.xfer_data[HRT_FE_DUMMY_CYCLES].word_count =
nrfe_mspi_xfer_config_ptr->rx_dummy * xfer_params.bus_widths.dummy_cycles /
BITS_IN_BYTE;

/* Configure data phase. */
xfer_params.xfer_data[HRT_FE_DATA].word_count = xfer_packet->num_bytes;

Expand Down
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