Zephyr SPIM does not receive any data from MISO pin

RE: Zephyr SPIM does not receive any data from MISO pin

user14926 — Wed, 15 Jun 2022 15:46:04 GMT

Unfortunately, I do not know what could be the issue in your case. Can you share your project with me? Then I can debug the problem and try to find a solution.

RE: Zephyr SPIM does not receive any data from MISO pin

user94037 — Mon, 13 Jun 2022 08:57:22 GMT

I'm sorry to rush you but is there any additional advice I can try...?

As I replied, both changing the pin definition and commenting out the calls not worked at all in my case.

RE: Zephyr SPIM does not receive any data from MISO pin

user94037 — Thu, 09 Jun 2022 09:20:15 GMT

[quote userid="14926" url="~/f/nordic-q-a/88435/zephyr-spim-does-not-receive-any-data-from-miso-pin/371475#371475"]Did you try changing the pin definitions in the file I linked, and/or comment out the calls to soc_secure_gpio_pin_mcu_select()?[/quote]

At first, I thought the file means child image but it was not.

So, I tried both referencing out and changing the pin assignment

static void remoteproc_mgr_config(void)
{
	/* UARTE */
	/* Assign specific GPIOs that will be used to get UARTE from
	 * nRF5340 Network MCU.
	 */
	// CPUNET_UARTE_PORT_TRX->PIN_CNF[CPUNET_UARTE_PIN_TX] =
	// 	GPIO_PIN_CNF_MCUSEL_NetworkMCU << GPIO_PIN_CNF_MCUSEL_Pos;
	// CPUNET_UARTE_PORT_TRX->PIN_CNF[CPUNET_UARTE_PIN_RX] =
	// 	GPIO_PIN_CNF_MCUSEL_NetworkMCU << GPIO_PIN_CNF_MCUSEL_Pos;
	// NRF_P0->PIN_CNF[CPUNET_UARTE_PIN_RTS] =
	// 	GPIO_PIN_CNF_MCUSEL_NetworkMCU << GPIO_PIN_CNF_MCUSEL_Pos;
	// NRF_P0->PIN_CNF[CPUNET_UARTE_PIN_CTS] =
	// 	GPIO_PIN_CNF_MCUSEL_NetworkMCU << GPIO_PIN_CNF_MCUSEL_Pos;

	/* Route Bluetooth Controller Debug Pins */
	// DEBUG_SETUP();

	/* Retain nRF5340 Network MCU in Secure domain (bus
	 * accesses by Network MCU will have Secure attribute set).
	 */
	NRF_SPU->EXTDOMAIN[0].PERM = 1 << 4;
}
#endif /* !CONFIG_TRUSTED_EXECUTION_NONSECURE */

As the remoteproc_mgr_config() function differs from the thread (there is no soc_secure_gpio_pin_mcu_select() I think), I referenced all the content of that function. But the P0.10 still not working

/* This should come from DTS, possibly an overlay. */
#if defined(CONFIG_BOARD_bcc_NRF5340_CPUAPP)
// #define CPUNET_UARTE_PIN_TX  1
// #define CPUNET_UARTE_PIN_RX  0
// #define CPUNET_UARTE_PORT_TRX NRF_P1
// #define CPUNET_UARTE_PIN_RTS 11
// #define CPUNET_UARTE_PIN_CTS 10

#define CPUNET_UARTE_PIN_TX  2
#define CPUNET_UARTE_PIN_RX  3
#define CPUNET_UARTE_PORT_TRX NRF_P0
#define CPUNET_UARTE_PIN_RTS 0
#define CPUNET_UARTE_PIN_CTS 1
#endif

Also, assigning other pins did not work. I modified the nrf5340_cpunet_reset.c like upper code.

RE: Zephyr SPIM does not receive any data from MISO pin

user14926 — Wed, 08 Jun 2022 15:24:43 GMT

The pins are still assigned to the network core domain, even if they are not used by the UART interface. Did you try changing the pin definitions in the file I linked, and/or comment out the calls to soc_secure_gpio_pin_mcu_select()?

RE: Zephyr SPIM does not receive any data from MISO pin

user94037 — Tue, 07 Jun 2022 02:06:40 GMT

I also disabled CONFIG_LOG of the network core according to this thread but it still not works

RE: Zephyr SPIM does not receive any data from MISO pin

user94037 — Tue, 07 Jun 2022 01:47:05 GMT

[quote userid="14926" url="~/f/nordic-q-a/88435/zephyr-spim-does-not-receive-any-data-from-miso-pin/370909#370909"]It is possible that P0.10 is assigned to the Network core for its UART instance[/quote]

As you told me, I checked the network core and found the child image 'hci_rpmsg' uses pin P0.10 for the UART instance and zephyr functions.

As I need to use P0.10, P0.11, and P1.1 for other purposes, I modified the cpu_net overlay file like following

The overlay file is located in the sdk/zephyr/samples/bluetooth/hci_rpmsg

However, the SPI data still not coming via P0.10...

RE: Zephyr SPIM does not receive any data from MISO pin

user14926 — Fri, 03 Jun 2022 13:55:45 GMT

Hi,

It is possible that P0.10 is assigned to the Network core for its UART instance, see this thread and this file.

Best regards,
Jørgen

RE: Zephyr SPIM does not receive any data from MISO pin

user94037 — Fri, 03 Jun 2022 01:47:04 GMT

[quote userid="14926" url="~/f/nordic-q-a/88435/zephyr-spim-does-not-receive-any-data-from-miso-pin/370243#370243"]Typically if you are not able to read the pin, it is configured for use/assigned to another peripheral.[/quote]

Just as Jorgen said, it seems like the pin P0.10 is assigned as another function. When I change the pin P0.20 as the MISO, for example, the SPI works well.

Even if I tried to assign P0.10 as GPIO output via nRF GPIO HAL, it does not work...

What peripheral can take P0.10? The nRF Connect extension of the VS code says that pin is unconnected

RE: Zephyr SPIM does not receive any data from MISO pin

user94037 — Thu, 02 Jun 2022 18:24:33 GMT

Also, I defined the pins for GPIO and SPI in the main.c file as following

// Pins for electrical recording and stimulation
#define pin_stim_enable                 NRF_GPIO_PIN_MAP(0, 17)
#define pin_mux_rec_sel0                NRF_GPIO_PIN_MAP(0, 21)
#define pin_mux_rec_sel1                NRF_GPIO_PIN_MAP(0, 16)
#define pin_mux_rec_sel2                NRF_GPIO_PIN_MAP(0, 14)
#define pin_mux_stim_sel0               NRF_GPIO_PIN_MAP(0, 6)
#define pin_mux_stim_sel1               NRF_GPIO_PIN_MAP(0, 24)
#define pin_mux_stim_sel2               NRF_GPIO_PIN_MAP(0, 22)
#define pin_mux_rec_enable              NRF_GPIO_PIN_MAP(0, 20)
#define pin_mux_stim_enable             NRF_GPIO_PIN_MAP(0, 8)
#define pin_vstart						NRF_GPIO_PIN_MAP(0, 26)

// Pins for SPI with variable resistor to control electrical stimulation waveform
#define pin_spim_stim_CS				NRF_GPIO_PIN_MAP(1, 12)
#define pin_spim_stim_MISO				NRF_GPIO_PIN_MAP(1, 3)
#define pin_spim_stim_MOSI				NRF_GPIO_PIN_MAP(1, 7)
#define pin_spim_stim_CLK				NRF_GPIO_PIN_MAP(1, 1)

// Pins for SPI with FPGA which decimates ADC's output
#define pin_spim_adc_CS					NRF_GPIO_PIN_MAP(0, 9)
#define pin_spim_adc_MISO				NRF_GPIO_PIN_MAP(0, 10)
#define pin_spim_adc_MOSI				NRF_GPIO_PIN_MAP(0, 11)
#define pin_spim_adc_CLK				NRF_GPIO_PIN_MAP(0, 12)
#define pin_spim_fpga_ind				NRF_GPIO_PIN_MAP(0, 19)
#define pin_fpga_osc_enable				NRF_GPIO_PIN_MAP(0, 27)

RE: Zephyr SPIM does not receive any data from MISO pin

user94037 — Thu, 02 Jun 2022 18:22:50 GMT

Sorry for the late reply :(

So, this is my overlay file for the nrf5340dk

// To get started, press Ctrl+Space to bring up the completion menu and view the available nodes.
// For more help, browse the DeviceTree documentation at https://docs.zephyrproject.org/latest/guides/dts/index.html
&led0 {
    gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
};

&button1 {
    gpios = <&gpio0 2 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
};


&qspi {
    status = "disabled";
};

&pwm0 {
    status = "disabled";
};

&uart0 {
    status = "okay";
    tx-pin = <2>;
    rx-pin = <3>;
    rts-pin = <0>;
    cts-pin = <1>;
};

// I had to disable these to use the requested pins.
&spi2 {
    status = "disabled";
};

&i2c1 {
    status = "disabled";
};

&button2 {
    status = "disabled";
};

And this is the prj.conf file

#
# Copyright (c) 2018 Nordic Semiconductor
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#

CONFIG_GPIO=y
CONFIG_PRINTK=y

CONFIG_BT=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_DEVICE_NAME="BCC_SAC_TEST"
CONFIG_BT_DEVICE_APPEARANCE=833
CONFIG_BT_NUS_THREAD_STACK_SIZE=2048
CONFIG_THREAD_NAME=y


CONFIG_BT_USER_DATA_LEN_UPDATE=y
CONFIG_BT_DATA_LEN_UPDATE=y
CONFIG_BT_USER_PHY_UPDATE=y
CONFIG_BT_GAP_AUTO_UPDATE_CONN_PARAMS=n

CONFIG_BT_BUF_ACL_RX_SIZE=251
CONFIG_BT_GATT_CLIENT=y
CONFIG_BT_ATT_PREPARE_COUNT=2
CONFIG_BT_CONN_TX_MAX=10
CONFIG_BT_MAX_CONN=1
CONFIG_BT_L2CAP_TX_BUF_COUNT=10
CONFIG_BT_L2CAP_TX_MTU=247
CONFIG_BT_BUF_ACL_TX_COUNT=10
CONFIG_BT_BUF_ACL_TX_SIZE=251

# Enable the NUS service
CONFIG_BT_NUS=y

# Enable bonding
CONFIG_BT_SETTINGS=y
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y
CONFIG_NVS=y
CONFIG_SETTINGS=y

# Enable DK LED and Buttons library
CONFIG_DK_LIBRARY=y

# This example requires more workqueue stack
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=8192
CONFIG_DEBUG_OPTIMIZATIONS=y
CONFIG_DEBUG_THREAD_INFO=y

# Config logger
CONFIG_LOG=n

CONFIG_ASSERT=y
CONFIG_ENTROPY_GENERATOR=y
CONFIG_TEST_RANDOM_GENERATOR=y

CONFIG_SPI=n
CONFIG_NRFX_SPIM=y
CONFIG_NRFX_SPIM1=y
CONFIG_NRFX_SPIM2=y
CONFIG_NRFX_GPIOTE=y

Should I disable something else??

RE: Zephyr SPIM does not receive any data from MISO pin

user14926 — Tue, 31 May 2022 13:19:58 GMT

Hi,

Which pin are you using for MISO on the nRF5340? Typically if you are not able to read the pin, it is configured for use/assigned to another peripheral.

Can you post your overlay and prj.conf files?

[quote user=""] P.S. The code crashes when I locate the bt_nus_data_send() in the SPIM handler but there was no problem doing so with ble_nus_data_send(). Is this the problem of priority which was managed by SoftDevice before?[/quote]

Sounds like it could be a priority issue, yes. What is the error when it crashes? You have the SPIM priority set to 2, so that is quite high. Have you tried lowering the priority?

Best regards,
Jørgen