Device detected but not identifyed: RX651 + Windows 10

Hello RaulDismuntel!

How's it going? Have you tried any fix  from Windows such as this: https://answers.microsoft.com/en-us/windows/forum/windows_10-hardware/unknown-usb-device-device-descriptor-request/7aa05689-ec10-474d-9fe7-5c140e01e380

Anyways, I hope you could wait for our experts to give you a definite answer soon.

All the best!

Sai
RenesasRulz Forum Moderator

https://renesasrulz.com/
https://academy.renesas.com/
en-support.renesas.com/knowledgeBase

Any help? I'm a bit stuck on this problem.

Which board are you using? Does it have a source for 48MHz USB clock?

C S Yep, you hitted the nail in the head. I'm working with a custom board and I haven't checked the USB SCKCR2 (USB Clock) !!! Thank you so much!!

Now Windows correctly detects and identifies the conexión as USB Serial Device. Then I have reinstalled the CDC_Demo driver and Windows detects it correctly too as Renesas CDC USB Demonstration.

However I'm having problemas when I run the demo code and connect to a PC terminal (Tera, RealTerm, ...).

When I try to connect to the RX651 COM port, the terminal software blocks itself and results in timeout or conexion error.

This is the Renesas Demo code I'm using 

/***********************************************************************
*
* FILE : Proyecto_USB_tutorial.c
* DATE : 2021-04-09
* DESCRIPTION : Main Program
*
* NOTE:THIS IS A TYPICAL EXAMPLE.
*
***********************************************************************/
#include "r_smc_entry.h"
#include "r_usb_basic_if.h"
#include "r_usb_pcdc_if.h"
#include "r_usb_pcdc_descriptor.h"
#include <stdio.h>
#include <string.h>
#include "pin.h"

#define FALSE false
#define TRUE true
#define OFF 0
#define ON 1

void R_USB_PinSet_USB0_PERI(); /* Initialize USB0_VBUS pin */
static uint8_t g_buf[1]; /* Variable to store input character from PC terminal */
volatile unsigned int flag_start = 1; /* Flag to print start message */
volatile uint16_t interval_level = 1; /* Variable to change CMT0 interval */
static char print_str[120]; /* String to print message at PC terminal */
volatile uint32_t slength; /* String length */

extern uint8_t g_apl_device[];
extern uint8_t g_apl_configuration[];
extern uint8_t *g_apl_string_table[];
const static usb_descriptor_t usb_descriptor =
{
g_apl_device, /* Pointer to the device descriptor */
g_apl_configuration, /* Pointer to the configuration descriptor for Full-speed */
USB_NULL, /* Pointer to the configuration descriptor for Hi-speed */
USB_NULL, /* Pointer to the qualifier descriptor */
g_apl_string_table /* Pointer to the string descriptor table */
};

void main(void);

static usb_status_t status;

void main(void)
{
R_Pins_Create();

/************************************************************************************************/

usb_ctrl_t ctrl;
usb_cfg_t cfg;

/* Start CMT0 counter operation*/
R_Config_CMT0_Start();

R_USB_PinSet_USB0_PERI(); /* USB MCU pin setting */

ctrl.module = USB_IP0; /* USB0 module */
ctrl.type = USB_PCDC; /* Peripheral Communication Device Class*/
cfg.usb_speed = USB_FS; /* USB_HS/USB_FS */
cfg.usb_mode = USB_PERI;
cfg.p_usb_reg = (usb_descriptor_t *)&usb_descriptor;
R_USB_Open(&ctrl, &cfg); /* Initializes the USB module */

/* Loop back between PC Terminal and USB MCU */
while (1)
{
status = R_USB_GetEvent(&ctrl);
switch (status)
{
case USB_STS_CONFIGURED :
break;

case USB_STS_WRITE_COMPLETE :
/* Read the input from PC terminal*/
R_USB_Read(&ctrl, g_buf, 1);
break;

case USB_STS_READ_COMPLETE :
/* Clear start message flag*/
flag_start = 0;
/* Instruction to slow down blinking rate is received */
if (('a' == *g_buf)|| ('A' == *g_buf))
{
/* Get new blink interval level. Maximum level is 9. */
if (interval_level < 10)
{
/* Notify the character received and inform next action */
sprintf(print_str, "\r\n Character 'a' or 'A' is received. LED2 will blink at slower rate.\r\n");
interval_level++;
}
else
{
sprintf(print_str, "\r\n This is minimum. Please press 'b' or 'B' to blink faster. \r\n");
}
}
else if (('b' == *g_buf)|| ('B' == *g_buf))
{
/* Get new blink interval level. Minimum level is 1 */
if (interval_level > 1)
{
/* Instruction to increase blinking rate is received */
sprintf(print_str, "\r\n Character 'b' or 'B' is received. LED2 will blink at faster rate.\r\n");
interval_level--;
}
else
{
sprintf(print_str, "\r\n This is maximum. Please press 'a' or 'A' to blink slower. \r\n");
}
}
else
{
sprintf(print_str, "\r\n Press keyboard to control the blinking rate of LED2 (not case sensitive)\n\r\n a ----> Slower\n\r\n b ----> Faster\n\r\n");
}
/* Print message at PC terminal */
slength = strlen(print_str);
R_USB_Write(&ctrl, (uint8_t *)print_str, slength);

/* Change blinking rate */
//CMT0.CMCOR = (uint16_t)(5000 * interval_level);
break;

default :
R_BSP_NOP();
break;
}

if (flag_start == 1)
{
/* Print start message until the 1st input from PC host is received */
sprintf(print_str, "Press space bar twice to start ...\r ");
slength = strlen(print_str);
R_USB_Write(&ctrl, (uint8_t *)print_str, slength);
}
}

}

Another possible problem is if you transfer multiples of 64-bytes, the PC side is waiting for more data. You should then send a ZLP (zero length packet). R_RSUB_Write( &ctrl, print_str, 0);

I dont know if you have hit this problem.. Could you check length of your transfers before "hung" 

您好，有个问题可以请教一下吗？就是关于那个HIDreportscr应该怎么设置的呢？希望可以交流qq ：1192028868