Esp32 i2c timeout. I understand the confusion about the timeout.
Esp32 i2c timeout I2C interface library in C++ for working with Espressif ESP32 IoT Development Framework (esp-idf), that supports master mode. 4 but it did not solve the issue) - Bluetooth enabled (NimBLE) and connected to device for WiFi provisioning. Espressif ESP32 Official Forumagain, the Saleae probe believes that a read has been set up to address 0x42 and the first byte (which is all zeroes) has been received and acked but then the clock stops again and i2c_master_cmd_begin() returns timeout. Hi I need read 32KB/Second from a I2C slave device, I catch follow I2C wave from scope during I2C reading by ESP32 Hi there, I've got a block of code which is occasionally blocking one of my tasks for a full second, leading to horrible jitter. - ESP32-WROVER-B on custom PCB - 10k pullups on I2C Bus Screenshot from datasheet showing transaction I am trying to achieve The issue was that the I2C transactions were timing out due to clock stretching by the slave of 80us. Adding this function call to my software solved the problem there as well. 4 (IDFGH-6923) #8543. I fixed this by using: Code: Select all. 3. zahor @anpl0907 Espressif IoT Development Framework. This is also using freertos. 4k), I removed the internal pull-ups for the GPIO configuration, but this did not change the behavior. both take a timeout parameter, so I see no way to e. I also powered the accelerometer with 3. I am trying to write a I2C wrapper around the ESP-IDF i2c component. I’m using Adafruit’s HUZZAH32 Feather (ESP32 WROOM) and three of their MPR121 capacitive touch sensor breakouts with I2C communication. I have done some low level debug to get the hardware i2c block to operate correct. Replacing those five files from your link above seems to Dear all, I am struggling with I2C bus and reading measurement from SHT30 sensor. tout of I2C peripheral) Top. - Communication through I2C (three devices on core 1, one I'm working on a 2-wheel balancing robot using an Adafruit feather ESP32 and I'm having very odd problems with I2C. Post by rich@rckco. Now I switched to a a ESP32-C2 (ESP8684-DevKitM1 rev1. Are these parsing correctly. - Communication through I2C (three devices on core 1, one I2C timeout. In such cases you want to wait the minimum amount of time and then start polling for a reply. A single I2C controller can be a master or a slave. ESP32 I2C Timing Question. c:161] i2cWrite(): Busy ESP32-C3 has 1 I2C controller(s) (also called port), responsible for handling communication on the I2C bus. Curiously, 16 ms later, and not while i2c_master_cmd_begin() is running, the clock returns high, which the slave I am using ESP32 as Master and AVR32 using as a slave device. Checking, it seems that for a "normal" ESP32 chip the maximum I2C timeout value is 0xFFFFF x 80 MHz APB clock cycles (so about 13 milliseconds), whereas for an ESP32S3 the maximum Espressif ESP32 Official Forumagain, the Saleae probe believes that a read has been set up to address 0x42 and the first byte (which is all zeroes) has been received and acked but then the clock stops again and i2c_master_cmd_begin() returns timeout. 0 branch) Jan 16, 2018. i am trying to read data from SHT30 and I'm getting a ESP_ERR_TIMEOUT ESP32’s I2C port working in the master made is responsible for establishing communication with slave I2C devices and sending commands to trigger actions by slaves, like doing a measurement and sending back a result. I'm trying to use an MPU6050 via I2C but it just keeps timing out. On an ESP32C3, the number of APB clock cycles that need to occur before the timeout expires is 2 Espressif ESP32 Official Forumagain, the Saleae probe believes that a read has been set up to address 0x42 and the first byte (which is all zeroes) has been received and acked but then the clock stops again and i2c_master_cmd_begin() returns timeout. The default value is 50ms. timeout (Optional, Time): Set the I²C bus timeout. No success. Im using pin 22 for SCL, and 21 for SDA. These crashes consistently have calls to the i2c_isr_handler_default in current thread and Core 0 always seems to be in ISR context. I've tried deleting the driver with i2c_driver_delete and then reinitializing it. 1. Copy link Contributor. I have an ESP32 WROVER dev board and a BQ27220. I tried to change the Interrupt wdt time by changing CONFIG_ESP_INT_WDT_TIMEOUT_MS ESP32-S3 has two I2C controllers (also referred to as ports) which are responsible for handling communications on the I2C bus. Checking, it seems that for a "normal" ESP32 chip the maximum I2C timeout value is 0xFFFFF x 80 MHz APB clock cycles (so about 13 milliseconds), whereas for an ESP32S3 the maximum I googled "esp32 i2c arduino timeout" and this is the first result. The only version I have found working is when using a 20ms delay: Code: Select all Actually I ran into the same problem yesterday. I am trying to read its device number. PS. i2c_set_timeout() Choice between transmitting / I am observing the same issues with the 5. This problem occurs on CPU0 only, here is the backtrace: Core 0 panic'ed (Interrupt wdt timeout on CPU0) Core 0 register dump: PC : 0x4008134c PS : 0x00050034 A0 : 0x4008171c A1 : 0x3ffc05e0 A2 : 0x3ffc135c A3 : 0x00000001 A4 : 0x00000001 A5 > You can talk to multiple devices from multiple tasks via the same I2C port without doing anything special. I've tried lowering the pins in software before reinitializing i2c. Espressif Homepage; ESP8266EX Official Forum; ESP8266 Community Forum; Information Due to a binutils bug of some kind, the line numbers in the monitor output (from addr2line) are sometimes wrong. rotematari Posts: 4 Joined: Tue Mar 26, 2024 3:36 pm. Seeing that the sensor has I2C Connection between ESP32-S2 and external real time clock (RTC): The SDA and SCA pins of the ESP32-S2 (Master device) are directly connected with the RTC DSB3231 (Slave). Actually I ran into the same problem yesterday. 11 1 1 bronze badge. I'm working with an ESP32 WROOM-32 module from Az-Delivery, which is a bit on the older side, the module is 3 years old without updating the firmware. The default value is 50 ms. There are two different operation modes to communicate with the sensor: Hold Master mode or No Hold Master mode. I2C[i2c_num]->timeout. com » Tue Oct 08, 2019 5:51 pm . I don't think I am using the bus at all until the read command, as this is the first command I am trying to do. setTimeout() - Arduino Reference. i use esp-idf to write and read data over the I2C bus. Interestingly, my code always fails at the exact same point. (Is-7021, OLED display and a BMP temp/press sensor). The I2C port reading a sensor starts getting random timeout errors only when I initialize the I2S audio peripheral. "ESP_ERR_TIMEOUT Operation timeout because the bus is busy" Maybe it depends on the timout setting. In some cases this sensor is disabled and a I2C timeout should occur. I am able to Initialize, Soft Reset, and Start a Measurement, but once I try to Read the Measurement I get a NACK from the Slave. This is incorrect. Improve this question. Maybe I made something wrong or misunderstood anything. Curiously, 16 ms later, and not while i2c_master_cmd_begin() is running, the clock returns high, which the slave ESP32-H2 has 2 I2C controller (also referred to as port), responsible for handling communications on the I2C bus. i would like to be sure if the way I'm doing it is correct. This is the code that I am using: Code: Select all. 82 ms (16-bit value @ 80MHz). If not set or 0, the timeout is disabled or set to the maximum possible value if the MCU does not support disabling the timeout. As I'm running the ESP32 on 80Mhz, the Maximum timeout I used is = 1048575. Espressif Homepage; Each time, when I2C's lines SCL or SDL stops connect (eg. A timeout can be specified using i2c_set_timeout, or you can specify ticks_to_wait as an argument to i2c_master_cmd_begin. bmp180, bme280, mpu6050). If ESP_ERR_TIMEOUT is returned, I2C wont work anymore - after replugging disconnected pins, result is still ESP_ERR_TIMEOUT. What you seem to be showing is a clock rate at the top signal and a data trace at the bottom signal. I am using legacy macros, and needed to write the macro for the read and write instruction - which I posted to another thread. Second, the I2C config code using esp32-idf(version:3. i2c_set_data_mode() Powering the ESP32 off/on solves the issue temporarily, so just like OP reported. Each I2C controller can operate as master or slave. Defaults to I am working on a project and my goal is to sample two different I2C sensors (flow and pressure) with a precise and specific frequency. (i2c_set_timeout) I tried to set timeout in multi value but it doesn't work. I know this because the debug logging just before it happens is always the same. Copy link Contributor Author. I've been able to communicate with several devices using I2C bus. 290 and found that the maximum timeout allowed on ESP32 is just about 12. I also ran into this issue where the ESP32 would consistently freeze after ~10 minutes, looping forever on esp32-hal-i2c timeout errors (or something like that). Post by taxi_dong » Tue Apr 25, 2017 12:08 pm . Hi, I'm trying to create a single object that's storing the transactions to happen on I2C bus by queueing all the operations and expecting the CPU to run them all correctly. For the record, I am using an I2C port to read a sensor as well as two I2S peripherals, one to drive a speaker, one to read in a mic. shows up in the backtrace. ESP32-C6 has 1 I2C controller (also referred to as port), responsible for handling communications on the I2C bus. ESP8266EX and ESP32 are some of our products. Seeing that the sensor has "status register 2" with flags to indicate when a new measurement can be read, I'd propose the following algorithm: 1. This is the code that I am using: It looks like all I needed was i2c_set_timeout(I2C_NUM_0, 400000); Top. After trying the code on an ESP32 chip, the read and write methods started to sproadically return ESP_ERR_TIMEOUT, based on the timing without honouring the requested timeout provided in I2C_TIMEOUT. 1 on my ESP32 DevKitC_V4 board. The intention of this library is to read and write to I2C slave devices (most sensors) with ease, by providing shows up in the backtrace. It has an I2C mode where you can ask it to decode the protocol into I2C values. c, occurs upon write when the i2c status register indicates that the bus is busy: On the same bus are 2 TMP006 (temp) sensors and they are picked up fine. ESP32 And when I am hammering the System with a high frequency of web requests the I2C fails much more often and the I2C timeout stopps. 5 ms (0xFFFFF with unit APB 80Mhz clock cycle). This is ESP32 chip with 2 CPU cores, WiFi/BT/BLE, silicon revision 0, 4MB external flash TM SDK version I2C timeout. When a master requests data and the slave doesn't have the data ready to send, it can pull the SCL line low (stretching the clock) to signal to the ESP32 has two I2C controllers (also referred to as ports) which are responsible for handling communications on the I2C bus. g. Set the bus timeout given in milliseconds. 4. Also, the i2c protocol does not specify the maximum stretching Actually I ran into the same problem yesterday. Post by tatulea » Fri Aug 09, 2019 3:19 pm . A task reads these pins every minute for various control functions. Using an I2C scanner is a quick and efficient way to find the addresses of all I2C devices connected to the ESP32. which defines common properties that may be set on many nodes. I have a logic analyzer to monitor the traffic as well. Ive been trying to the the I2C to work on my Hiletgo ESP-WROOM module. I have used i2c multiple times in arduino platform before. The HUZZAH does not have SDA/SCL Hi, i'm developing an i2c driver for the sensor Si7021, I noticed that the commands that have repeated start in its sequence give me a noncorrect response. 3 Espressif ESP32 Official Forum. The MPR121 breakouts have distinct I2C addresses, I2C level shifting and a regulator (it’s a 3V chip: to use 3V or 5V sources) and include the required SDA/SCL pullups. As an example, one controller can act as a master I've got a fairly consistent IWDT timeout that occurs about 25%-50% of the time given the following conditions: ESP32 running ESP-IDF v4. I was starting step by step. I haven't had any issues with other breakout boards I've tried (e. The esp32 connects to my MA12040P Merus-Audio power amplifier - I2S for audio and I2C for control. I2C_WRAPPER: I am using an ESP32-wrover and communicating with an RRC1120 battery pack. 1: Simple i2c write procedure. 20ms of clock stretching seems to be quite a long time; might be more than the I2C peripheral can be configured to allow before detecting a timeout. Not all of these may apply to the “espressif,esp32-i2c Hi, I have seen your code, maybe in line 41, the third parameter in the i2c_master_write_byte as ACK_CHECK_EN. Typically, an I2C slave device has a 7-bit address or 10-bit address. Curiously, 16 ms later, and not while i2c_master_cmd_begin() is running, the clock returns high, which the slave Prepare the answer immediately following the command receive, to prevent a timeout in the onRequestEvent(). I also have a couple of DRV8871 motor drivers connected to GPIO 14, 15, 32 and 33 using LEDC channels 0, 1, 2 and 3. On the ESP32, the I2C was clocked by APB indeed, which is 80MHz: (ESP32 Technical Reference Manual page 295) But on the shows up in the backtrace. I have a BNO055 connected up to I2C using the Adafruit sensor APIs. (b) switched master/slave and slave/master in a loop. Hi, I was working on esp32 s3 with the I2C_simple example. The timeout value passed is stored in the lower 20 bits of register I2C_TO_REG. any suggestions could be About Us. In the first case the SCL line is blocked (controlled by sensor) during measurement process while in the latter case the SCL line remains open for other communication while the sensor is processing the measurement. Core 1 panic'ed (Interrupt wdt timeout on CPU1) Core 1 register dump: PC : 0x400896b6 PS : 0x00060e34 A0 : 0x800888ab A1 : 0x3ffbea40 A2 : 0x3ffb7f38 A3 : 0x3ffbc830 A4 : 0x00000001 A5 : 0x00000001 I also tried both with "i2c_master_write_read_device", but it still doesn't work. How exactly does each of these values work? Some devices have variable delays between receiving a command and issuing a reply. I am now learning about I2C in esp32. I use platformIO with arduino framework to write code for the esp32 and I am using the 2 cores. sda_pullup_en = 0; conf. Espressif Homepage; ESP8266EX Official Forum; ESP8266 When working with the ESP32, a powerful microcontroller with built-in I2C support, it's essential to identify the correct I2C address of each device to ensure reliable communication. Unfortunately, access to the I2C bus generates panic (see below) when I touch the panel, the esp32 generates the interrupt and calls the ISR handler. I've tried changing the frequency on the clock. 0x release using the latest I2S drivers. The sensor used in this example is a MPU9250 inertial measurement unit. Edit: setting the timeout to 0 kept it working for more than 25mins (for now); will see if it handles more than 4h. I even added a different IMU to the I2C bus and ESP32 can see it. This was an oversight because I did not think thoroughly enough about all the desired output signals. A single I2C controller can operate as master or slave. Upon further investigation it seems like i2c_master_cmd_begin() is blocking for a full second. 3 Hi there: we've been running I2C stuff very happily on ESP32 for a while now. Checking, it seems that for a "normal" ESP32 chip the maximum I2C timeout value is 0xFFFFF x 80 MHz APB clock cycles (so about 13 milliseconds), whereas for an ESP32S3 the maximum Without more context, the I2C trace doesn't look "wrong". calculate the expected time your measurement should both take a timeout parameter, so I see no way to e. The problem with I2C and the ESP32 is that the ESP32 does not do I2C clock stretching. ChrisM ChrisM. @roy. I2C Timeout on VCNL4010 Sensor. i2c_set_timeout() Choice between transmitting / receiving the LSB or MSB first, choose one of the modes defined in i2c_trans_mode_t. I Timeout for unchanged SCL during clock stretching of the I2C target in microseconds. Specifically, I receive timeout errors when trying to detect an Adafruit BNO055 breakout board (address 0x28) using the i2c-tools template. c and look for defines with the suffix _DEFAULT . 3) is as shown below: ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. Espressif ESP32 Official Forum. The ESP32 hardware I2C interfaces have a timeout parameter and that's a good feature for reacting to I2C bus faults. I ret = i2c_master_cmd_begin(I2C_NUM_0, cmd, 5000 / portTICK_RATE_MS); i2c_cmd_link_delete(cmd); The problem is that the read command returns 107 (timeout error). I use an ESP32 board I bought on Actually I ran into the same problem yesterday. void setTimeOut (uint16_t ESP32 has two I2C controllers (also referred to as ports) which are responsible for handling communications on the I2C bus. More ESP32 has 2 I2C controller (also referred to as port), responsible for handling communications on the I2C bus. The only thing that works is reseting the device physically. 2. Hi, I have an ESP32 WROVER dev board and a BQ27220. About Us. 3V Pull up resistors: 4k7 You can change the value with function i2c_set_timeout (it modifies the register timeout. My Master µC is an The ESP32 I2C library is based on the Arduino Wire Library and implements a few more APIs, described in this documentation. I have narrowed it down to my err_check condition, so something in "i2c_read_from_device" is causing the problem. DavidAntliff changed the title I2C crashing - watchdog timeout (master branch) I2C crashing - watchdog timeout (master & v3. Follow asked Nov 29 at 14:43. Thread Safety The factory function i2c_new_master_bus() and i2c_new_slave_device() are guaranteed to be thread safe by the driver, which means that the functions can be called from different RTOS tasks without Attaching a ms5611 ( GY86 ) to the esp32 on i2c - works perfectly for about 5-10 minutes - some strange values do come in however it seems to work pretty well. tout = 200000; in I2C timeout. Espressif Homepage; The ESP32 I2C library is based on the Arduino Wire Library and implements a few more APIs, described in this documentation. As an example, one controller can act as a master and the other as a slave at the same time. In order for these components to work correctly, you need to define the I²C bus in your configuration. I checked the reference, p. The ESP-SDK driver sets this to a default value corresponding to 8 I2C SCL clock cycle lengths. sda_io_num = gpio_sda; conf. The RTC is power by 3. You configure it as an input. Also, I made a couple of ugly attempts to try get round this issue: (a) set up I2C_NUM_0 = master, I2C_NUM_1 = slave and let them share same SDA/SCL pins. 2. Since this is in the main loop and we need a fast execution, the I2C timeout should be the minimun posible. koobest commented Jun 29, 2018. I2C Timeout. You signed out in another tab or window. i2c_set_data_mode() I2C endless SCL strobe until timeout on esp32-s3 wroom and esp-idf 4. My i2c read seems to block / stall my ULP code. For example, to check the I2C timeout value, call i2c_get_timeout(). Interrupts that are there are part of I2C driver and FreeRTOS. I never had problems with I2C before. I don't think this is correct. 2, that occasionally the I2C gets wedged and we get a stream of "Busy Timeout!" log messages, which, based upon the code in esp32-has-i2c. Here is what I did in the meantime based on your suggestions: pull-ups on SDA and SCL are already in place (2. introduce a vTaskDelay and release control to other tasks? In more general terms my question is: what is a good way to read I2C devices while blocking the MCU at a minimum? What I want to do is to read four ADC's (Texas Instruments ADS1015) at 3. The function names are always correct, so it's definitely somewhere in the interrupt handler. How to protect it to recover after disconnecting pins? For example, to check the I2C timeout value, call i2c_get_timeout(). I see random brake down in the i2c communication. buffer */ #define I2C_MASTER_RX_BUF_DISABLE 0 /*!< I2C master doesn't need buffer */ #define I2C_MASTER_TIMEOUT_MS 1000 //#define MPU9250_SENSOR_ADDR 0x68 /*!< Slave address of the MPU9250 sensor */ //#define shows up in the backtrace. Reload to refresh your session. Espressif Systems is a fabless semiconductor company providing cutting-edge low power WiFi SoCs and wireless solutions for wireless communications and Internet of Things applications. mode = I2C_MODE_MASTER; conf. Official development framework for Espressif SoCs. Rarely, I2C accesses to the fuel-gauge will time out. I am just using simple i2c scanner logic to list addresses on the bus. Conceptionally, the I2C bus has a A timeout can be specified using i2c_set_timeout, or you can specify ticks_to_wait as an argument to i2c_master_cmd_begin. So I thought I would extend the ESP32-S3 timeout to see if that fixes it. The Arduino Uno has a timeout for the low-level I2C code: setWireTimeout() - Arduino Reference The Stream class has a timeout for Serial communication (useless for the I2C bus): Stream. If you are disabling the acknowledge check condition if the slave sends the NACK master will not check the condition and it will not enable the I2C_NACK_INTR maybe that is the cause to get the failure. Post by rotematari » Thu Apr 25, 2024 9:21 am . To check the default parameter values which are set during the driver configuration process, please refer to the file driver/i2c. This component sets up the I²C bus for your ESP32 or ESP8266. 4 (f31b5c3bd2) Bus voltage: 3. timeout; esp32; i2c; arduino-esp32; Share. I'm trying to refine my understanding of how the ESP32-S3 master-mode I2C time-out is applied. The ESP32 series employs either a Tensilica Xtensa LX6, Xtensa LX7 or a RiscV processor, and both dual-core and single-core variations are available. 3. 0. /* i2c - Simple example Simple I2C example that shows how to initialize I2C as well as reading and writing from and to registers for a sensor connected over I2C. ESP32-S2 has two I2C controllers (also referred to as ports) which are responsible for handling communications on the I2C bus. We also have an I2C touch-screen. I have created a driver for a touch panel (see below) that should read the data on the I2C bus within an ISR handler. Also, just note that that esp32 is a bit ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. How to protect it to recover after disconnecting pins? My attempts We are using ESP-IDF version 4. IDF version is 4. 3V, GND is Each time, when I2C's lines SCL or SDL stops connect (eg. I am using a System on Chip (SoC) ESP32 microcontroller and a MPU6050 (an sensor that contains a gyroscope and an accelerometer). 1 (tried upgrading to v4. ESP_Angus Posts: 2344 I found this post that suggests changing the I2C timeout, which I did through i2c_set_timeout(), But that didn't seem to help (I'm not sure I understand the timeout values with that Been having issues trying to get the SHT31 Slave to ACK after initiating a Read. The maximum I2C bus timeout set with i2c_set_timeout() is as miserable as 0. I am unplugging it), i2c_master_cmd_begin returns ESP_FAIL or ESP_ERR_TIMEOUT. As an example, one controller can act as a master and the Can you kindly provide the boot log when ESP32 is abnormally reset? By the way, here is a suggestion for your code ： FayeY changed the title ESP_ERR_TIMEOUT during i2c_Read [TW#23619] ESP_ERR_TIMEOUT during i2c_Read Jun 27, 2018. ESP32-C6 I2C ESP_ERR_TIMEOUT. I am encountering an issue with I2C communication while using ESP-IDF v5. I'm working with an I2C battery fuel-gauge that can clock-stretch for up to 4 milliseconds. i2c_set_data_mode() Hi there: we've been running I2C stuff very happily on ESP32 for a while now. Also this write function is called several times before we get to here. ESP32 I am encountering an issue with I2C communication while using ESP-IDF v5. I assume that there is a Problem with the Interrupt priorities between I2C and somewhat of WLAN. We are using ESP-IDF version 4. There are 2 ISR functions that get printed, uart_hal_write_txfifo and i2c_isr_handler_default but the EPCx registers in the guru dump don't exactly match what the core dump produced. I2C timeout. I understand the confusion about the timeout. Hi there: we've been running I2C stuff very happily on ESP32 for a while now. How to protect it to recover after disconnecting pins? My attempts Hi all, I found that when using I2C to obtain data from device in the receive function timeout cannot be minor of 1000 ms. The ESP32 uses the function name For the ESP32, I2C_LL_MAX_TIMEOUT translates through multiple defines to the value 0xFFFFF. The problem is that the ESP32 I2C peripheral has a bug Each time, when I2C's lines SCL or SDL stops connect (eg. Post by parttimehacker » Thu Jul 20, 2017 2:08 pm . Hi,@hvishu, These crashes consistently have calls to the i2c_isr_handler_default in current thread and Core 0 always seems to be in ISR context. We've just switched to using ESP32S3 and find that the i2c_set_timeout() function is failing. I was able to make the I2C connection with the slave but, When I was trying to read from the slave after reading the 1st data I am getting I2C Timeout. On an ESP32, timeout represents the number of APB clock cycles that need to occur before the timeout expires. void setTimeOut (uint16_t Actually I ran into the same problem yesterday. esp_err_t i2c_set_timeout (i2c_port_t i2c_num, Hi, i'm developing an i2c driver for the sensor Si7021, I noticed that the commands that have repeated start in its sequence give me a noncorrect response. By OS I think you are referring to the one my computer uses, which is Windows 11 up to date. It also looks like you are using the Saleae software for examining the trace. Maybe this is a timeout parameter? In the documentation I could only find the following information: ESP8266EX and ESP32 are some of our products. My setup is the webradio example from buddyCasino. If I move the sda/clk leads to my Raspberry the chip works fine so I'm probably doing something wrong with the ESP32. Hi - I'm trying to get a simple I2C program to talk to a MSP23017 chip but the i2c_master_cmd_begin reports a time-out. Cheers. 3 kHz, which is quite challenging I think? I2C timeout. Closed bar-bog opened this issue Mar 10, 2022 · 12 comments Closed I2C endless SCL strobe until timeout on esp32-s3 wroom I2C Timeout. AVR32 image sends Sends ACK (if lock on block data is successful) during the first read transaction I2C Timeout[0m [0;32mI (38392) i2c: i2c command write failure ESP_ERR_TIMEOUT [0m. We have noticed, perhaps since upgrading to IDF 3. EDIT: I'm not using any interrupt in user code. I have configured the bus for 400K though changing it to 100K speed didn't change anything. Top. any suggestions could be ESP32 has 2 I2C controller(s) (also called port), responsible for handling communication on the I2C bus. Replacing those five files from your link above seems to 20ms of clock stretching seems to be quite a long time; might be more than the I2C peripheral can be configured to allow before detecting a timeout. 2, that occasionally the I2C gets wedged and we get a stream of "Busy Timeout!" log messages, which, based upon the Some code to init the I2C: i2c_config_t conf; conf. - espressif/esp-idf Board: ESP32 DevKit C V4 IDE: Arduino IDE OS: Windows on ESP: FreeRTOS my Question: (DAC5578SPW) which is controlled via I2C from my ESP32. The crash appears to be occurring in about the same place in the cycle my code is going through. Even the first call to i2c_master_write_read_device (to read the number of available bytes) could fail with ESP_ERR_TIMEOUT, but a typical flow I2C timeout. Checking, it seems that for a "normal" ESP32 chip the maximum I2C timeout value is 0xFFFFF x 80 MHz APB clock cycles (so about 13 milliseconds), whereas for an ESP32S3 the maximum ESP32 has 2 I2C controller (also referred to as port), responsible for handling communications on the I2C bus. I debugged into it and found out so far that it seems to be correlated to the number of bytes send in one I2C transaction. 1) and encounter exactly the same problem. Then loads of [E][esp32-hal-i2c. I2C hardware stops after one transition. For your code, I don't think adding a write bit Hi all, I found that when using I2C to obtain data from device in the receive function timeout cannot be minor of 1000 ms. I have code using the I2C on a ESP32 without any issues. taxi_dong Posts: 7 Joined: Mon Feb 06, 2017 3:29 am. I've got a fairly consistent IWDT timeout that occurs about 25%-50% of the time given the following conditions: ESP32 running ESP-IDF v4. I connected the SDA and SCL pins of the ESP32 to SDA and SCL pins of the MPU6050 respectively. Extra. All of my drivers are up to date as well and esp32 in the board manager on the Arduino IDE. The code only runs a driver initilization of an I2C device. For your code, I don't think adding a write bit Do you think this is a realistic approach with single ESP32 given i'll be using i2c mux to solve the addressing issues. 1 post • Page 1 of 1. You signed in with another tab or window. If you notice, the replies are horrifyingly unhelpful, blaming his hardware and essentially saying "don't do that". To send or read data I have to call the function below: As far as I know this function sends or writes all data in the command queue. As an example, one controller can act as a master and the Hi @o-marshmallow, thanks for your quick response. 3 kHz, which is quite challenging I think? However, the semantics of the timeout parameter varies from core type to core type. calculate the expected time your measurement should Good morning, im new to the topic of I2C, was reading a lot in the past and try to understand how it works. If the ESP32 is the I2C master then surely the clock signal should always be an output from the ESP32. I've tried reseting rx and tx fifo with i2c_reset_rx_fifo and i2c_reset_tx_fifo. . Curiously, 16 ms later, and not while i2c_master_cmd_begin() is running, the clock returns high, which the slave Actually I ran into the same problem yesterday. scl_io_num = gpio_scl; 20ms of clock stretching seems to be quite a long time; might be more than the I2C peripheral can be configured to allow before detecting a timeout. Clock speed: 100kHz IDF version: 4. and we are using the I2C comunication with LM75 sensor. We are observing that the timeout the comunication is 1 second every time. In other words, if the i2c device does not respond, the reception function is blocking for at least 1000ms. I am able to read serial number and status register therefore i2c driver, i2c bus and sensor should be working. calculate the expected time your measurement should The maximum I2C bus timeout set with i2c_set_timeout() is as miserable as 0. I used a piece of code to activate the accelerometer and get readings from it. You switched accounts on another tab or window. dfhn rbqy dwrgfq ljnrou hvtuyw wxs rzvrefy gyqkxm osp yygu