igrr
commented
1 year ago To understand the issue, I tired the same code on a esp32-s3-DevKitC-1 v1.1, and it resulted in the same behavior (lost connection to it via USB/JTAG port)
When the board enters this state, can you try to connect the USB cable to the other USB connector (CP2102) instead, and see what output you get in the logs?
5ami
Answers checklist.
IDF version.
IDF V5.0
Operating System used.
Windows
How did you build your project?
VS Code IDE
If you are using Windows, please specify command line type.
PowerShell
Development Kit.
esp32-s3-DevKitC-1 v1.1 & custom board
Power Supply used.
USB
What is the expected behavior?
I have custom esp32s3 board, That doesn't contain a reset and boot button or a UART port. I simply lost connection to it via USB/JTAG port while flashing a modified code of TWAI driver example using the self-test example .
To understand the issue, I tired the same code on a esp32-s3-DevKitC-1 v1.1, and it resulted in the same behavior (lost connection to it via USB/JTAG port)
I Expected the program to run and return an error log, or keeps resetting.
What is the actual behavior?
After flashing the modified (defected) software, Windows can not recognize the device giving USB device not recognized msg.
The device will be recognized again if you flash the correct software through UART port. or by putting the board to download mode.
The question is, what does actually happens to prevent the board from connecting through the JTAG/USB port ?
I want to avoid this scenario in our custom board that doesn't include a UART USB port or a reset button to put the chip into download mode, hence losing all connection to custom board.
my initial guess that this due to some efuse that get emulated in way to disable the JTAG/USB port
Steps to reproduce.
/* TWAI Self Test Example
This example code is in the Public Domain (or CC0 licensed, at your option.)
Unless required by applicable law or agreed to in writing, this software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
include
include
include "freertos/FreeRTOS.h"
include "freertos/task.h"
include "freertos/semphr.h"
include "esp_err.h"
include "esp_log.h"
include "driver/twai.h"
/ --------------------- Definitions and static variables ------------------ /
//Example Configurations
define NO_OF_MSGS 10
define TX_GPIO_NUM 3
define RX_GPIO_NUM 8
define TX_TASK_PRIO 4 //Sending task priority
define RX_TASK_PRIO 5 //Receiving task priority
define CTRL_TSK_PRIO 6 //Control task priority
define MSG_ID 0x555 //11 bit standard format ID
define EXAMPLE_TAG "TWAI Self Test"
static const twai_timing_config_t t_config = TWAI_TIMING_CONFIG_25KBITS(); //Filter all other IDs except MSG_ID static const twai_filter_config_t f_config = {.acceptance_code = (MSG_ID << 21), .acceptance_mask = ~(TWAI_STD_ID_MASK << 21), .single_filter = true}; //Set to NO_ACK mode due to self testing with single module static const twai_general_config_t g_config = TWAI_GENERAL_CONFIG_DEFAULT(TX_GPIO_NUM, RX_GPIO_NUM, TWAI_MODE_NO_ACK);
static SemaphoreHandle_t tx_sem; static SemaphoreHandle_t rx_sem; static SemaphoreHandle_t ctrl_sem; static SemaphoreHandle_t done_sem;
/ --------------------------- Tasks and Functions -------------------------- /
static void twai_transmit_task(void *arg) { twai_message_t tx_msg = {.data_length_code = 1, .identifier = MSG_ID, .self = 1}; //xSemaphoreTake(tx_sem, portMAX_DELAY); for (int i = 0; i < NO_OF_MSGS; i++) { ESP_LOGI(EXAMPLE_TAG, "Msg Sent - Data = %d", i); //Transmit messages using self reception request tx_msg.data[0] = i; ESP_ERROR_CHECK(twai_transmit(&tx_msg, portMAX_DELAY)); vTaskDelay(pdMS_TO_TICKS(10)); } vTaskDelete(NULL); }
static void twai_receive_task(void *arg) { twai_message_t rx_message; //xSemaphoreTake(rx_sem, portMAX_DELAY); for (int i = 0; i < NO_OF_MSGS; i++) { //Receive message and print message data ESP_ERROR_CHECK(twai_receive(&rx_message, portMAX_DELAY)); ESP_LOGI(EXAMPLE_TAG, "Msg received - Data = %d", rx_message.data[0]); } //Indicate to control task all messages received for this iteration xSemaphoreGive(ctrl_sem); vTaskDelete(NULL); }
static void twai_control_task(void *arg) { xSemaphoreTake(ctrl_sem, portMAX_DELAY); //Start TWAI Driver for this iteration ESP_ERROR_CHECK(twai_start()); ESP_LOGI(EXAMPLE_TAG, "Driver started");
}
void app_main(void) { //Create tasks and synchronization primitives tx_sem = xSemaphoreCreateBinary(); rx_sem = xSemaphoreCreateBinary(); ctrl_sem = xSemaphoreCreateBinary(); done_sem = xSemaphoreCreateBinary();
}
Debug Logs.
No response
More Information.
No response