Support about USB HID Receive Data from PC in nRF52840

[ToanBui]

Now, I use USB for transfer and receive data with PC. But when I use the example zephyr/samples/subsys/usb/hid : https://github.com/zephyrproject-rtos/zephyr/tree/main/samples/subsys/usb/hid. It only have transfer data from chip to PC and not to receive. I try to many ways but it don't work. I don't read anything. 

Now, I use NCS v 2.3.0 for code and VS Code for my project.

Please so help me. 

[ToanBui]

Sigurd Thank you for your reply. I am so happy for that. Sorry but my project requires USB HID not USB CDC ACM. I use hid_int_ep_write is very good but  hid_int_ep_read is not working. When I send data from PC, my NRF52 chip don't receive anything. 

This is my prj.conf:

CONFIG_USB_DEVICE_STACK=y CONFIG_USB_DEVICE_HID=y CONFIG_USB_DEVICE_PRODUCT="Zephyr HID sample" CONFIG_USB_DEVICE_PID=0x0006 CONFIG_USB_HID_BOOT_PROTOCOL=y CONFIG_USB_DEVICE_VID=0x2FD4 CONFIG_USB_DEVICE_MANUFACTURER="Emotiv" CONFIG_USB_DEVICE_INITIALIZE_AT_BOOT=n CONFIG_LOG=y CONFIG_USB_DRIVER_LOG_LEVEL_ERR=y CONFIG_USB_DEVICE_SOF=n # CONFIG_USB_HID_REPORTS=2 CONFIG_ENABLE_HID_INT_OUT_EP=y CONFIG_USB_HID_POLL_INTERVAL_MS=1 CONFIG_HID_INTERRUPT_EP_MPS=64

And this is my code:

static const uint8_t hid_report_desc[] = {     HID_USAGE_PAGE(HID_USAGE_GEN_DESKTOP),     HID_USAGE(HID_USAGE_GEN_DESKTOP_UNDEFINED),     HID_COLLECTION(HID_COLLECTION_APPLICATION),     HID_LOGICAL_MIN8(0x00),     HID_LOGICAL_MAX16(0xFF, 0x00),     HID_REPORT_ID(REPORT_ID_1),     HID_REPORT_SIZE(8),     HID_REPORT_COUNT(1),     HID_USAGE(HID_USAGE_GEN_DESKTOP_UNDEFINED),     HID_INPUT(0x02),     HID_OUTPUT(0x01),     HID_END_COLLECTION, }; static void send_report(struct k_work *work) {     int ret, wrote;     if (!atomic_test_and_set_bit(hid_ep_in_busy, HID_EP_BUSY_FLAG)) {         ret = hid_int_ep_write(hdev, (uint8_t *)&report_1,                        sizeof(report_1), &wrote);         if (ret != 0) {             /*              * Do nothing and wait until host has reset the device              * and hid_ep_in_busy is cleared.              */             LOG_ERR("Failed to submit report");         } else {             LOG_DBG("Report submitted");         }     } else {         LOG_DBG("HID IN endpoint busy");     } } static void int_in_ready_cb(const struct device *dev) {     ARG_UNUSED(dev);     if (!atomic_test_and_clear_bit(hid_ep_in_busy, HID_EP_BUSY_FLAG)) {         LOG_WRN("IN endpoint callback without preceding buffer write");     } } static void int_out_ready_cb(const struct device *dev) {     ARG_UNUSED(dev);     if (!atomic_test_and_clear_bit(hid_ep_in_busy, HID_EP_BUSY_FLAG)) {         LOG_WRN("IN endpoint callback without preceding buffer write");     } } static void on_idle_cb(const struct device *dev, uint16_t report_id) {     LOG_DBG("On idle callback");     k_work_submit(&report_send); } static void report_event_handler(struct k_timer *dummy) {     /* Increment reported data */     report_1.value++;     k_work_submit(&report_send); } static void protocol_cb(const struct device *dev, uint8_t protocol) {     LOG_INF("New protocol: %s", protocol == HID_PROTOCOL_BOOT ?         "boot" : "report"); } static const struct hid_ops ops = {     .int_in_ready = int_in_ready_cb,     .on_idle = on_idle_cb,     .protocol_change = protocol_cb,     .int_out_ready = int_out_ready_cb, };

[Sigurd]

Hi!

Looking at your snippet, I don't see where you are calling hid_int_ep_read()

Maybe try adding that in the int_out_ready_cb() function

[ToanBui]

Oh thank you. I work fine right now. If I have some trouble in the future, I will contact you later and thank you for support.