SPIM3 not work standalone.

[loquat]

nRF52804 SPIM3 not work.
(SCLK/MOSI not output)

However, if I debug it using jlink, it works. 

My environment is
nRF52840-DK(PCA10056/v1.0.0)
nRF52 SDK 17.0.2

My program is

	/* SCK */
	nrf_gpio_pin_clear(SPIM_CLK_PIN);
	nrf_gpio_cfg(SPIM_CLK_PIN,
						NRF_GPIO_PIN_DIR_OUTPUT,
						NRF_GPIO_PIN_INPUT_CONNECT,
						NRF_GPIO_PIN_NOPULL,
						NRF_GPIO_PIN_S0S1,
						NRF_GPIO_PIN_NOSENSE);
	/* MOSI */
	nrf_gpio_pin_clear(SPIM_MOSI_PIN);
	nrf_gpio_cfg_output(SPIM_MOSI_PIN);
	/* MISO */
	nrf_gpio_cfg_input(SPIM_MISO_PIN, (nrf_gpio_pin_pull_t)NRFX_SPIM_MISO_PULL_CFG);
	/* SS */
	nrf_gpio_pin_set(SPIM_SS_PIN);
	nrf_gpio_cfg_output(SPIM_SS_PIN);

	/**/
    NRFX_IRQ_DISABLE(TARGET_SPIM_IRQ);
	SpimReg.ENABLE = SPIM_ENABLE_ENABLE_Enabled << SPIM_ENABLE_ENABLE_Pos;
	SpimReg.TASKS_STOP = 1;
	SpimReg.PSEL.SCK = SPIM_CLK_PIN;
	SpimReg.PSEL.MOSI = SPIM_MOSI_PIN;
	SpimReg.PSEL.MISO = SPIM_MISO_PIN;
	SpimReg.FREQUENCY = SPIM_FREQUENCY_FREQUENCY_K125;
	SpimReg.RXD.PTR = uint32_t(m_recv_buff),
	SpimReg.RXD.MAXCNT = 2;
	SpimReg.RXD.LIST = 0;
	SpimReg.TXD.PTR = uint32_t(m_send_buff),
	SpimReg.TXD.MAXCNT = 2;
	SpimReg.TXD.LIST = 0;
	SpimReg.CONFIG = 0; /* active-high / Leading / MsbFirst */
	SpimReg.ORC = 0x00;
	
	SpimReg.EVENTS_END = 0;
	SpimReg.TASKS_START = 1;
	while ( SpimReg.EVENTS_END == 0);

EVENT_END is done.(Maybe the process is finished )
But SCLK and MOSI not output.

[Susheel Nuguru]

In the debug mode the high speed clocks are forced and kept ON by the debugger. When you say that it seems to work with debugger only, the first suspect we should check are how you are managing the SPI peripheral clocks? In you code it does not look like you have initialized or used any nrfx spi drivers so probably you need to start the clocks manually if you are not using any drivers from the sdk. Can you give me your whole init file so that i can see how you are initializing the whole thing?

[loquat]

I work with,
SoftDevice and FreeRTOS.

What is  "high speed clock"?
Do you mean HFCLK?
Is HFCLK not automatically turned on when needed?
Please tell me how to forcibly turn on HFCLK.

Following simple source code.

main()
{
  nrf_drv_clock_init();
  nrf_drv_power_config_t power_config = BOARD_POWER_CONFIG_DCDC;
  nrf_drv_power_init(&power_config);
  SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
  ...
  vTaskStartScheduler();
  ...
}

void MyTask()
{
  nrf_sdh_enable_request();
  uint32_t ram_start = 0;
  nrf_sdh_ble_default_cfg_set(BLE_CONN_CFG_TAG, &ram_start);
  nrf_sdh_ble_enable(&ram_start);
  ...
  SPIM3 execute.
}

[Susheel Nuguru]

loquat said:

Is HFCLK not automatically turned on when needed?

the internal RC HFLCK is started on its own but not the XTAL. You can use nrf_drv_clock_hfclk_request 

[loquat]

I was added to use nrf_drv_clock_hfclk_request().
But It's not work.(SCLK and MOSI is not driven.)

Additional information.
When enable UARTE(NRF_UART0->ENABLE=8), It's all work.

[Susheel Nuguru]

loquat said:

I was added to use nrf_drv_clock_hfclk_request().
But It's not work.(SCLK and MOSI is not driven.)

But if you start in the debugger then you see that it works?

Strange, can you please give me your whole project so that i can test in on my end.