RE: SPI in zephry timing problems with nrfx_spi.c

Sigurd — Tue, 04 Jul 2023 12:09:09 GMT

Hi,

I don't see the point in porting a nRF5-SDK based WS2812b driver to Zephyr, because Zephyr already have a WS2812b driver and a sample for this driver.

https://github.com/nrfconnect/sdk-zephyr/tree/main/samples/drivers/led_ws2812

https://github.com/nrfconnect/sdk-zephyr/blob/main/drivers/led_strip/ws2812_spi.c

RE: SPI in zephry timing problems with nrfx_spi.c

smeric — Tue, 06 Jun 2023 16:19:43 GMT

SES WS2812b data timing

Zephyr WS2812b data timing

in 2us there must be 1 falling.( NRF_SPI_FREQ_8M )

ws2812b code was ported from

https://github.com/takafuminaka/nrf52832-spi_ws2812b_flashing_random/blob/master/ws2812b_driver/ws2812b_driver.c#L186

RE: SPI in zephry timing problems with nrfx_spi.c

smeric — Tue, 06 Jun 2023 16:00:03 GMT

Yes I am porting all SES code ( nRF5-SDK. ) to Vs Code nRF Connect SDK

SES Code

Vs Code Zephyr

app_config.h for clock configration in SES ..

// <o> NRF_SDH_CLOCK_LF_SRC  - SoftDevice clock source.
  // <0=> NRF_CLOCK_LF_SRC_RC 
  // <1=> NRF_CLOCK_LF_SRC_XTAL 
  // <2=> NRF_CLOCK_LF_SRC_SYNTH 

  #ifndef NRF_SDH_CLOCK_LF_SRC
  #define NRF_SDH_CLOCK_LF_SRC 0
  #endif

  // <o> NRF_SDH_CLOCK_LF_RC_CTIV - SoftDevice calibration timer interval. 
  #ifndef NRF_SDH_CLOCK_LF_RC_CTIV
  #define NRF_SDH_CLOCK_LF_RC_CTIV 16
  #endif

  // <o> NRF_SDH_CLOCK_LF_RC_TEMP_CTIV - SoftDevice calibration timer interval under constant temperature. 
  // <i> How often (in number of calibration intervals) the RC oscillator shall be calibrated
  // <i>  if the temperature has not changed.

  #ifndef NRF_SDH_CLOCK_LF_RC_TEMP_CTIV
  #define NRF_SDH_CLOCK_LF_RC_TEMP_CTIV 2
  #endif

  // <o> NRF_SDH_CLOCK_LF_ACCURACY  - External clock accuracy used in the LL to compute timing.
 
  // <0=> NRF_CLOCK_LF_ACCURACY_250_PPM 
  // <1=> NRF_CLOCK_LF_ACCURACY_500_PPM 
  // <2=> NRF_CLOCK_LF_ACCURACY_150_PPM 
  // <3=> NRF_CLOCK_LF_ACCURACY_100_PPM 
  // <4=> NRF_CLOCK_LF_ACCURACY_75_PPM 
  // <5=> NRF_CLOCK_LF_ACCURACY_50_PPM 
  // <6=> NRF_CLOCK_LF_ACCURACY_30_PPM 
  // <7=> NRF_CLOCK_LF_ACCURACY_20_PPM 
  // <8=> NRF_CLOCK_LF_ACCURACY_10_PPM 
  // <9=> NRF_CLOCK_LF_ACCURACY_5_PPM 
  // <10=> NRF_CLOCK_LF_ACCURACY_2_PPM 
  // <11=> NRF_CLOCK_LF_ACCURACY_1_PPM 

  #ifndef NRF_SDH_CLOCK_LF_ACCURACY
  #define NRF_SDH_CLOCK_LF_ACCURACY 1
  #endif

prj.conf file in Vs Code

CONFIG_LOG=y

#CONFIG_LED_STRIP=y
#CONFIG_LED_STRIP_LOG_LEVEL_DBG=y
#CONFIG_WS2812_STRIP=y
CONFIG_NEWLIB_LIBC=y
#clock config
CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y
CONFIG_CLOCK_CONTROL_NRF_K32SRC_500PPM=y
CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC_CALIBRATION=y
CONFIG_CLOCK_CONTROL_NRF_CALIBRATION_LF_ALWAYS_ON=y

CONFIG_SPI_NRFX=y

uninit and init code in vs code nRF Connect SDK, with zephyr.

  nrfx_spi_evt_handler_t handler;
  
  nrfx_spi_uninit(&(spi->spi));
  
  nrfx_spi_config_t spi_config =
      {
          .ss_pin = NRFX_SPI_PIN_NOT_USED,
          .irq_priority = 2,//APP_IRQ_PRIORITY_HIGH,
        #ifdef DRIVE_MODE_8M
          .frequency = NRF_SPI_FREQ_8M,
        #endif
        #ifdef DRIVE_MODE_4M
          .frequency = NRF_SPI_FREQ_4M,
        #endif

          .mode = NRF_SPI_MODE_1,
          .bit_order = NRF_SPI_BIT_ORDER_MSB_FIRST,
          .miso_pin = NRFX_SPI_PIN_NOT_USED,
       //   .sck_pin = NRFX_SPIM_PIN_NOT_USED,
      };
        if (spi_pin_number == 0) {
          spi_config.sck_pin = SPI0_SCK_PIN;
         // spi_config.sck_pin = NRFX_SPI_PIN_NOT_USED;
          spi_config.mosi_pin = SPI0_MOSI_PIN;
          
        } else if (spi_pin_number == 1) {
          spi_config.sck_pin = SPI1_SCK_PIN;
         // spi_config.sck_pin =NRFX_SPI_PIN_NOT_USED;
          spi_config.mosi_pin = SPI1_MOSI_PIN;
        } else {
          spi_config.sck_pin = SPI2_SCK_PIN;
          //spi_config.sck_pin = NRFX_SPI_PIN_NOT_USED;
          spi_config.mosi_pin = SPI2_MOSI_PIN;
        };
        spi_config.skip_gpio_cfg=true;
        spi_config.skip_psel_cfg = false;

        //spi_config.skip_psel_cfg
        handler = spi0_event_handler;
  nrf_gpio_cfg(
    spi_config.mosi_pin,
    NRF_GPIO_PIN_DIR_OUTPUT,
    NRF_GPIO_PIN_INPUT_DISCONNECT,
    NRF_GPIO_PIN_NOPULL,
    NRF_GPIO_PIN_H0H1,
    NRF_GPIO_PIN_NOSENSE);

  nrf_gpio_cfg(
    spi_config.sck_pin,
    NRF_GPIO_PIN_DIR_OUTPUT,
    NRF_GPIO_PIN_INPUT_DISCONNECT,
    NRF_GPIO_PIN_NOPULL,
    NRF_GPIO_PIN_H0H1,
    NRF_GPIO_PIN_NOSENSE);

  spi->transfer_completed = &spi_transfer_completed[id];
  ws2812b_driver_spi[id] = spi;
  nrfx_spi_init(&(spi->spi), &spi_config, handler, NULL);

ps : pin changing is working I can see all logic changing, but all changing is with wrong timing

RE: SPI in zephry timing problems with nrfx_spi.c

Sigurd — Tue, 06 Jun 2023 15:26:59 GMT

Hi,

[quote user=""] I wrote that code in SES but I dont know how can I do it in zephyr and use nrfx_spi.c file. is ses I did like that[/quote]

You wrote some code using nrfx and with the nRF5-SDK. And you are now porting this code over to nRF Connect SDK, and the Zephyr RTOS ? Correct?