Need QPI code example for my memory chip

[inghowe83]

Hi,

I cannot locate any QPI sample code in the example. Was it possible for anyone to share me the sample code?

Thanks a bunch.

[inghowe83]

Thanks.

I tried the change the below code(under nrf_gpio.h), still no improvement. I was able to read the register using SPI master sample code from nordic nRF5_SDK_15.2.0_9412b96\examples\peripheral\spi

Do you know how can I use the qspi example(using nrf_drv_qspi_cinstr_xfer()) to read the register? I believe it will be great if I could at least test whether the register read is working before go into writing it.

__STATIC_INLINE void nrf_gpio_cfg_output(uint32_t pin_number)
{
    nrf_gpio_cfg(
        pin_number,
        NRF_GPIO_PIN_DIR_OUTPUT,
        NRF_GPIO_PIN_INPUT_DISCONNECT,
        NRF_GPIO_PIN_NOPULL,
//old        NRF_GPIO_PIN_S0S1,
		NRF_GPIO_PIN_H0H1,
        NRF_GPIO_PIN_NOSENSE);
}

[inghowe83]

And when I take a closer look into the timing diagram I captured. 

1) when using NRF_QSPI_CINSTR_LEN_2B, one frame is missing. We should have 0x5,0x00, 0x06(WREN), 0x01(WRSR), 0x02(SR1NV),0x02(CR1NV). But in fact, from the diagram I only get 0x5,0x00, 0x06(WREN), 0x01(WRSR), 0x02(SR1NV)

static void configure_memory()
{
    uint16_t setting_spec[2] = {0x02,0x02};
    uint32_t err_code;
    nrf_qspi_cinstr_conf_t cinstr_cfg = {
        .opcode    = QSPI_STD_CMD_RSTEN,
        .length    = NRF_QSPI_CINSTR_LEN_1B,
        .io2_level = true,
        .io3_level = true,
        .wipwait   = true,
        .wren      = true
    };
    // Send reset enable
    err_code = nrf_drv_qspi_cinstr_xfer(&cinstr_cfg, NULL, NULL);
    APP_ERROR_CHECK(err_code);

    // Send reset command
    cinstr_cfg.opcode = QSPI_STD_CMD_RST;
    err_code = nrf_drv_qspi_cinstr_xfer(&cinstr_cfg, NULL, NULL);
    APP_ERROR_CHECK(err_code);

    // Switch to qspi mode
    cinstr_cfg.opcode = 0x01;
    cinstr_cfg.length = NRF_QSPI_CINSTR_LEN_2B;
    err_code = nrf_drv_qspi_cinstr_xfer(&cinstr_cfg, setting_spec, NULL);
    APP_ERROR_CHECK(err_code);
}

2) when using NRF_QSPI_CINSTR_LEN_3B, one frame is empty. We should have 0x5,0x00, 0x06(WREN), 0x01(WRSR), 0x02(SR1NV),0x02(CR1NV). But in fact, from the diagram I only get 0x5,0x00, 0x06(WREN), 0x01(WRSR), 0x02(SR1NV), 0x00(CR1NV) <---- missing data

static void configure_memory()
{
    uint16_t setting_spec[2] = {0x02,0x02};
    uint32_t err_code;
    nrf_qspi_cinstr_conf_t cinstr_cfg = {
        .opcode    = QSPI_STD_CMD_RSTEN,
        .length    = NRF_QSPI_CINSTR_LEN_1B,
        .io2_level = true,
        .io3_level = true,
        .wipwait   = true,
        .wren      = true
    };
    // Send reset enable
    err_code = nrf_drv_qspi_cinstr_xfer(&cinstr_cfg, NULL, NULL);
    APP_ERROR_CHECK(err_code);

    // Send reset command
    cinstr_cfg.opcode = QSPI_STD_CMD_RST;
    err_code = nrf_drv_qspi_cinstr_xfer(&cinstr_cfg, NULL, NULL);
    APP_ERROR_CHECK(err_code);

    // Switch to qspi mode
    cinstr_cfg.opcode = 0x01;
    cinstr_cfg.length = NRF_QSPI_CINSTR_LEN_3B;
    err_code = nrf_drv_qspi_cinstr_xfer(&cinstr_cfg, setting_spec, NULL);
    APP_ERROR_CHECK(err_code);
}

[haakonsh]

Maybe you need to use NRF_QSPI_CINSTR_LEN_2B

[inghowe83]

hI haakonsh

Thanks for the suggestion.

If I use NRF_QSPI_CINSTR_LEN_2B, I will only have one data sent out for example, my string is 0x02,0x02. It will sent out 0x02 only. Its already shown in my previous post.

[haakonsh]

Ahh my bad I think the length config should be NRF_QSPI_CINSTR_LEN_3B when you've got 2 data bytes in your custom  commands