SPI peripherial with no output

[Nihsrob]

Hi,

I have got the problem with using BMD-340 demo SPI commuination for many days.

+----------------------------+
|                                    |
| Problem Describtion   |
|                                    |
+----------------------------+

1. Developing Tool:

(*) RIGADO BMD-340 Evaluation Kit  BMD-340 datasheet
(*) Module based on Nordic nRF52840
-------------------------------------

2. Software:   Segger-Embedded-Studio 

(*) SEGGER Embedded Studio for ARM 4.30c
(*) nRF5_SDK_16.0.0_98a08e2
(*) Nordic\nRF5_SDK_16.0.0_98a08e2\examples\peripheral
-------------------------------------

3. Present steps 

Step 1 - Go folder [D:\User\Nordic\nRF5_SDK_16.0.0_98a08e2\examples\peripheral\nrfx_spim\pca10056\blank\ses].

Step 2 - Open [nrfx_spim_pca10056.emProject] by {SEGGER Embedded Studio for ARM 4.30c} .

Step 3 - Connect BMD-340 board to PC then turn on the power.

Step 4 - In {SEGGER Embedded Studio for ARM 4.30c} press [Target] -> [Connect J-link].

Step 5 - In {SEGGER Embedded Studio for ARM 4.30c} press [Target] -> [Download nrfx_spim_pca10056].

-------------------------------------

+----------------------------+
|                                   |
| SPI signal output pin |
|                                   |
+----------------------------+

4. Excepted Result

Step 1 - On {SEGGER Embedded Studio for ARM 4.30c} the project [nrfx_spim_pca10056.emProject], see "main.c".

Step 2 - Default SPI specification starting from line 51.

#include "nrfx_spim.h"
#include "app_util_platform.h"
#include "nrf_gpio.h"
#include "nrf_delay.h"
#include "boards.h"
#include "app_error.h"
#include <string.h>
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"

#define NRFX_SPIM_SCK_PIN  3
#define NRFX_SPIM_MOSI_PIN 4
#define NRFX_SPIM_MISO_PIN 28
#define NRFX_SPIM_SS_PIN   29
#define NRFX_SPIM_DCX_PIN  30

#define SPI_INSTANCE  3                                           /**< SPI instance index. */
static const nrfx_spim_t spi = NRFX_SPIM_INSTANCE(SPI_INSTANCE);  /**< SPI instance. */

static volatile bool spi_xfer_done;  /**< Flag used to indicate that SPI instance completed the transfer. */

#define TEST_STRING "Nordic123456789012345678901234567890"
static uint8_t       m_tx_buf[] = TEST_STRING;           /**< TX buffer. */
static uint8_t       m_rx_buf[sizeof(TEST_STRING) + 1];  /**< RX buffer. */
static const uint8_t m_length = sizeof(m_tx_buf);        /**< Transfer length. */

51 #define NRFX_SPIM_SCK_PIN 3
52 #define NRFX_SPIM_MOSI_PIN 4
53 #define NRFX_SPIM_MISO_PIN 28
54 #define NRFX_SPIM_SS_PIN 29
55 #define NRFX_SPIM_DCX_PIN 30
.
.
.
62 #define TEST_STRING "Nordic123456789012345678901234567890"

Step 3 - so that I get string "Nordic123456789012345678901234567890" at BMD-340 GPIO pin 4 because [#define NRFX_SPIM_MOSI_PIN 4] on line 52.
-------------------------------------

+-----------------------------+
|                                    |
| Logic Analyzer Demo   |
|                                    |
+-----------------------------+

Step 1 - Logic Analyzer connect to BMD-340 GPIOpin4(P0.4 on board) or P0.3

Step 2 - setting analysis rate 100M Hz <-- Must greater than SPI clock rate to get signal
-------------------------------------

+-----------------------+
|                             |
|       Problem         |
|                             |
+-----------------------+

1. no matter what PIN in BMD-340 { P0.3(SCK) P0.4(MOSI) P0.28(MISO) P0.29(SS) P0.30(DCX) } cannot trigger logic analyzer

2. I connect probe of analyzer with PIN VCC (5V0) and logic analyzer was triggered with signal 1.

3.  (2) means logic analysis can work and detect signal on port, only SPI definition port has no signal.

+-----------------------+
|                             |
|     NEED HELP    |
|                             |
+-----------------------+

(*) Can anyone explain does any of above steps wrong?
(*) It just a demo SPI transport function, I have tryed other SPI examples like {spi, spi_master_using_nrf_spi_mmgr, spis} in [/peripheral/] but none of them works.
(*) My project is to use [BMD-340] f_open() file, pass value to [FPGA] with SPI and their pin connected together.

+------------------------------------+                             +-----------------------+
|                                             |                              | PC                       |
|            BMD - 340               +==============+ SEGGER            |
|                                             |                              | Embedded Stdio |
+-+------+--------+----------+----+                             +-----------------------+
    |          |             |            |
    |SCK  | MOSI   | MISO  |SS
    |          |             |            | 
+-+--------+---------+---------+--+
|                                             |
|                 FPGA                  |
|                                             |
+------------------------------------+

--------------------------------------------------------

Please info me if there is anything not clear, I am eager to find the solution.

[Simonr]

Hi

A common problem with the modules is that they don't include the optional LF crystal that our SDK examples run by default. Please try adding the following defines to your sdk_config.h file:

// </e>

// <e> NRF_CLOCK_ENABLED - nrf_drv_clock - CLOCK peripheral driver - legacy layer
//==========================================================
#ifndef NRF_CLOCK_ENABLED
#define NRF_CLOCK_ENABLED 1
#endif
// <o> CLOCK_CONFIG_LF_SRC  - LF Clock Source
 
// <0=> RC 
// <1=> XTAL 
// <2=> Synth 
// <131073=> External Low Swing 
// <196609=> External Full Swing 

#ifndef CLOCK_CONFIG_LF_SRC
#define CLOCK_CONFIG_LF_SRC 0
#endif

// <q> CLOCK_CONFIG_LF_CAL_ENABLED  - Calibration enable for LF Clock Source
 

#ifndef CLOCK_CONFIG_LF_CAL_ENABLED
#define CLOCK_CONFIG_LF_CAL_ENABLED 1
#endif

// <o> CLOCK_CONFIG_IRQ_PRIORITY  - Interrupt priority
 

// <i> Priorities 0,2 (nRF51) and 0,1,4,5 (nRF52) are reserved for SoftDevice
// <0=> 0 (highest) 
// <1=> 1 
// <2=> 2 
// <3=> 3 
// <4=> 4 
// <5=> 5 
// <6=> 6 
// <7=> 7 

#ifndef CLOCK_CONFIG_IRQ_PRIORITY
#define CLOCK_CONFIG_IRQ_PRIORITY 6
#endif

//==========================================================
// <e> NRFX_CLOCK_ENABLED - nrfx_clock - CLOCK peripheral driver
//==========================================================
#ifndef NRFX_CLOCK_ENABLED
#define NRFX_CLOCK_ENABLED 1
#endif
// <o> NRFX_CLOCK_CONFIG_LF_SRC  - LF Clock Source
 
// <0=> RC 
// <1=> XTAL 
// <2=> Synth 
// <131073=> External Low Swing 
// <196609=> External Full Swing 

#ifndef NRFX_CLOCK_CONFIG_LF_SRC
#define NRFX_CLOCK_CONFIG_LF_SRC 0
#endif

// <o> NRFX_CLOCK_CONFIG_IRQ_PRIORITY  - Interrupt priority
 
// <0=> 0 (highest) 
// <1=> 1 
// <2=> 2 
// <3=> 3 
// <4=> 4 
// <5=> 5 
// <6=> 6 
// <7=> 7 

#ifndef NRFX_CLOCK_CONFIG_IRQ_PRIORITY
#define NRFX_CLOCK_CONFIG_IRQ_PRIORITY 6
#endif

Best regards,

SImon

[Nihsrob]

Hi, thank you for answering the problem.

And I added the code you supply, the logic analyzer still detect no signal for SCK , MOSI ...

-----------------------------------------------------

This is my [main.c], I added print "Failed!" when stuck in the while loop.

The debug mode actually keep printing "Failed"  

Here is another problem.

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#include "nrfx_spim.h"
#include "app_util_platform.h"
#include "nrf_gpio.h"
#include "nrf_delay.h"
#include "boards.h"
#include "app_error.h"
#include <string.h>
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"

#define NRFX_SPIM_SCK_PIN  3
#define NRFX_SPIM_MOSI_PIN 4
#define NRFX_SPIM_MISO_PIN 28
#define NRFX_SPIM_SS_PIN   29
#define NRFX_SPIM_DCX_PIN  30

#define SPI_INSTANCE  3                                           /**< SPI instance index. */
static const nrfx_spim_t spi = NRFX_SPIM_INSTANCE(SPI_INSTANCE);  /**< SPI instance. */

static volatile bool spi_xfer_done;  /**< Flag used to indicate that SPI instance completed the transfer. */

#define TEST_STRING "Nordic123456789012345678901234567890"
static uint8_t       m_tx_buf[] = TEST_STRING;           /**< TX buffer. */
static uint8_t       m_rx_buf[sizeof(TEST_STRING) + 1];  /**< RX buffer. */
static const uint8_t m_length = sizeof(m_tx_buf);        /**< Transfer length. */

void spim_event_handler(nrfx_spim_evt_t const * p_event,
                       void *                  p_context)
{
    spi_xfer_done = true;
    NRF_LOG_INFO("Transfer completed.");
    if (m_rx_buf[0] != 0)
    {
        NRF_LOG_INFO(" Received:");
        NRF_LOG_HEXDUMP_INFO(m_rx_buf, strlen((const char *)m_rx_buf));
    }
}

int main(void)
{
    bsp_board_init(BSP_INIT_LEDS);

    APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
    NRF_LOG_DEFAULT_BACKENDS_INIT();

    nrfx_spim_xfer_desc_t xfer_desc = NRFX_SPIM_XFER_TRX(m_tx_buf, m_length, m_rx_buf, m_length);

    nrfx_spim_config_t spi_config = NRFX_SPIM_DEFAULT_CONFIG;
    spi_config.frequency      = NRF_SPIM_FREQ_1M;
    spi_config.ss_pin         = NRFX_SPIM_SS_PIN;
    spi_config.miso_pin       = NRFX_SPIM_MISO_PIN;
    spi_config.mosi_pin       = NRFX_SPIM_MOSI_PIN;
    spi_config.sck_pin        = NRFX_SPIM_SCK_PIN;
    spi_config.dcx_pin        = NRFX_SPIM_DCX_PIN;
    spi_config.use_hw_ss      = true;
    spi_config.ss_active_high = false;
    APP_ERROR_CHECK(nrfx_spim_init(&spi, &spi_config, spim_event_handler, NULL));

    NRF_LOG_INFO("NRFX SPIM example started.");

    while (1)
    {
        // Reset rx buffer and transfer done flag
        memset(m_rx_buf, 0, m_length);
        spi_xfer_done = 0;//false;

        APP_ERROR_CHECK(nrfx_spim_xfer_dcx(&spi, &xfer_desc, 0, 15));

        while (!spi_xfer_done)
        {
printf("Failed!\n");
            __WFE();
        }

        NRF_LOG_FLUSH();

//        bsp_board_led_invert(BSP_BOARD_LED_0);
        nrf_delay_ms(200);
    }
}

Thank you for sharing that idea, I hope that we can keep moving with this problem.

Best regards,

Nihsrob