be equal APB frequency (GPIO, 2, 10 or 50 MHz), //not sure for 400 000 - (10= 1.2 MHz, 15=800 kHz, 30=400 kHz), //minimum wait time is 40 uS, but for sure, leave it 100 uS, "Found I2C device at adress 0x%X (hexadecimal), or %d (decimal)\n", /* Command or commands, or sending bytes, just the same name of the variable 'command' */, //sending address of the device, 0 = sending, //filling data register with byte, if single - command, multiple - command(s) and data, //sending command to the device in order to request data, //REPEATED START condition to change from sending address + command to receive data, //sending address of the device, 1 = reading, //this will send later NAK (not acknowledged) to signal it is last byte, //issuing STOP condition before (!) expressed in remaining bytes, that is 0.75*16=12. 0. First example is not implemented correctly. while(! This code is based on the excellent answers provided at the ST forums, but combined here as a complete class. I2C1->DR = dataAddr; //I2C1->OAR1 |= ( 0x68 CR2 =0x00; RCC->APB2ENR |= RCC_APB2ENR_IOPBEN; while(! GPL-3.0 License Releases No releases published. Hi, I've been reading the I2C datasheet for making a communication between PIC16F1824 and OZ8920(battery protection IC) So, I downloaded the I2C_EEPROM example code from Microchip. ****************************************************************************** while(! This example uses the I2C peripheral library to write an array of values to the I2C Serial EEPROM and verify the value written by reading the values back and comparing it to the value written. In this code, there is two examples, one writing just 16 bytes, another one writing more than that in few steps with delay of 2 mS between each ‘packets’ of 16 bytes. Don't bother with separate functions for byte, int, long, etc. 1k and 2k EEPROMs can write only 8 bytes at a time, but 4k/8k/16k can write 16 bytes at a time. } Thanks. The twiSend() function is, fairly simple, we just send address of the device shifted to the left by. }. for(uint8_t i = 0; i SR1 & I2C_SR1_RXNE)); void i2cWrite(uint8_t devAddr, uint8_t regAddr, uint8_t data); #endif, #if 0 if(size > 1) Notify me of follow-up comments by email. char received = I2C2->DR; I2C2->CR1 |= I2C_CR1_STOP; * @brief Read MPU6050 sensor data through I2C Example 3: Arduino sketch example. I2C2->CR1 = 0x00; We've shown how to hook up the Microchip 24AA025E64 EEPROM to the I2C bus and reviewed our use of the ASF's I2C drivers to access it. received[i] = I2C1->DR; Attention: in some tutorial is used the STM32F0-Discovery where there is mounted the STM32F051R8, an example are the … I2C1->CCR |= 180; { (I2C1->SR1 & I2C_SR1_TXE)); // stop communication and read last byte The address pins are only necessary if more than one EEPROM chips are going to be used. I ported my old for F4 to HAL based libraries for F0/F4/F7 series. I2C2->TRISE |= 37; (I2C2->SR1 & I2C_SR1_RXNE)); void i2cRead(uint8_t devAddr, uint8_t regAddr, uint8_t size); while(! #define PWR_MGMT_1 0x6B So we must first issue command, then read. * @date 30-March-2019 I2C1->DR = (devAddr CCR = 45; // 400kHz I2C To write data, first ensure the WP (write protect) pin is connected to GND. int main(void) int16_t temp = i2cMPU6050Temp(); for(uint8_t i = 0; i SR1 & I2C_SR1_RXNE)); } (I2C1->SR1 & I2C_SR1_SB)); // sending to data that i want to read { The examples that you can find here are for STM32 mcu and for develop our examples we use the STM32CubeIDE. //I2C1->CCR |= I2C_CCR_FS; For example, the third IC would have these pins connected: A0 | A1 | A2 0 | 1 | 0 Writing New Data. I2C1->CR1 |= I2C_CR1_START | I2C_CR1_ACK; STM32 blink LED – first programming steps in Keil, I2C and MS5611 precision Barometer using STM32, STM32 programming SPI for Si4432 transceiver, STM32 programming – Bit or Byte ‘Banging’ on AD9850, Solar observation – sunspots and solar transits, Night sky – photos and videos – timelapse, Ultralight DIY quadcopter – 45 grams only. Learn how your comment data is processed. while(I2C2->CR1 & I2C_CR1_STOP); void delay(uint32_t delay) I2C1->CR1 &= ~I2C_CR1_ACK; This delay is some intrinsic property of the memory, and we can’t do anything about that. I found this chip below board with STM32f103VET6, that was surprise for me. … { #define WHO_AM_I 0x75 I will give example for Atmel 24C08 chip, which has 8 kbit (!) */, #define MPU6050Address 0x68 * @brief B7 – MPU6050 SDA I2C is a popular protocol and is supported by many devices. I am not sure but I think the same codes can work in other editors/compilers/assemblers, but I am not familiar with those. temp |= received[0] << 8 | received[1]; /** This one uses number of characters (for example 92), subtract fraction (say 12), then it goes NOT from 0 to 92, but from 0 to 80 in steps of 16. // GPIO clock freq=50 MHz MUST !!! #define TEMP_OUT_L 0x42. Tutorial: How to increase range of your toy-grade quadcopter and how to install buzzer. I2C1->DR = (devAddr DR; Okay, I will contact you over the e-mail. For example, here: Your email address will not be published. while(I2C2->SR1 & I2C_SR1_SB); I2C2->DR = 0xd1; – STM32F0에 eeprom 에뮬레이션에 대한 참조 매뉴얼은 AN4061입니다. I2C1->CR1 |= I2C_CR1_PE; void i2cWrite(uint8_t devAddr, uint8_t regAddr, uint8_t data) * @brief B6 – MPU6050 SCL (I2C2->SR1 & I2C_SR1_TXE)); I2C2->CR1 |= I2C_CR1_START; (I2C1->SR1 & I2C_SR1_SB)); // say “hello, i want to read data from data address that i just send” then control if address is matched STM32 I2C EEPROM with HAL 1 minute read #Talking to a I2C EEPROM using the STM32 HAL libraries. Did not found any data about that board, nor it is mentioned in STM32 literature. In the example code I did not make algorithm for writing whole chip, because in practice this type of memory is just for few variables, maybe some calibration data or whatever user need to change after programming MCU, or during. I2C1->CR1 |= I2C_CR1_STOP; Note that this is for the SMT32L0 , check your RM and Datasheet for I2c pins and alternate functions for STM32F0 and F3. Just there is something weird with part of the code, can you repeat? For, specific command set read datasheet of particular device - it is different, for all different devices. The driver is focused and was tested with a 256 Kbit memory (24xx256), but it should be compatible with the 64Kbit, 128 Kbit, 256 Kbit and 512 Kbit versions. Your email address will not be published. Driver API for I2C Bus Peripheral (Driver_I2C.h) I 2 C (Inter-Integrated Circuit, referred to as I-squared-C, I-two-C, or IIC) is a multi-master serial single-ended bus and is mostly used on single boards, but can also connect to components which are linked via cable.. { If you want, you may try %c and you will get ASCII values, /* EEPROM example writing and reading more than 16 bytes in few sequences*/, "This is example of writing EEPROM memory more than 16 bytes - in sequences of 16 bytes + 12 . EEPROM sounds intimidating for the beginners, probably because there are few rules to comply. If we try only read from some address, device, don't know what to send. Contribute to nimaltd/ee24 development by creating an account on GitHub. while(I2C2->SR1 & I2C_SR1_ADDR); I2C2->DR = 0x75; At this time, ‘num-fraction’ is 92-12=80, which means that it begins to write at position 80 in EEPROM memory, for next ‘fraction’, which is 12 bytes. GPIOB->CRH |= GPIO_CRH_CNF10 | GPIO_CRH_MODE10; SERIAL DATA (SDA): The SDA pin is bidirectional for serial data transfer.This pin is open-drain driven and may be wire-ORed with any number of other open-drain or open-collector devices. Note that, some STM32 boards has already EEPROM (8 Kbit) on the bottom of the PCB. 나는 stm32f0 발견 보드를 사용하여 eeprom을 읽거나 쓰려고한다. 필자는 읽기 및 쓰기 기능을 테스트하기 위해 작은 코드를 작성했습니다. int main(void) while(! 기본 구조는 hal 라이브러리와 cubemx를 사용하고 있습니다. This web site provides information about our embedded development tools, evaluation software, product updates, application notes, example code, and technical support. I am trying to emulate EEPROM in flash of the mcu. 24x01 serial EEPROM. Variable ‘num’ uses function strlen(test2) to get number of characters needed for two ‘for(;;)’ loops. while(! 1 bit, or-red | zero (0) at free space that tell I2C bus it is for write operation. STM – STM32F0-Discovery examples are here How to use USART1, USART2, SysTick, I/O and EEPROM emulation on STM32F0-Discovery is here; How to use STM32F0-Discovery for realize an automatic gate is here; Here there are a video tutorial concerning STM32F0. For future reference, the STM32F0 I2C speed calculator can be found under the name: STSW-STM32126. Since I did not use this chip in the past, I can’t give any example for now, but for sure it will be here in the future. The examples from about 4k7 to use 24C512 EEPROM chip has. I am having a problem with read/write in the flash region. Then some conversion of characters into uint8_t form. I2C2->CCR |= I2C_CCR_FS; delay(1000); EEPROM sounds intimidating for the beginners, probably because there are few rules to comply. { I2C1->CR2 |= 50; // 50MHz void i2cRead(uint8_t devAddr, uint8_t dataAddr, uint8_t size) Example is STM32F103VET6 */. EEPROM dublicate pages. The receive twiReceive() function works by sending address also shifted left, one bit with logic or | zero (0) at empty bit (LSB), but then we must send command, to the device depending what device has. If that is the case, just increment the three-bit address value for each new chip. You can rate examples to help us improve the quality of examples. STSW-STM32049 - STM32F0 Discovery kit firmware package, including 21 examples and preconfigured projects for 4 different IDEs, STSW-STM32049, STMicroelectronics I2C1->CR1 |= I2C_CR1_STOP; while(! #define TEMP_OUT_H 0x41 // GPIO Settings | Alternate Function | Open Drain | 50MHz (I2C1->SR2 & I2C_SR2_BUSY)); void i2cInitialization(void) Also, there is no restriction between two readings. On erasing and writing in Flash, I am getting status as HAL_OK. www.pudn.com > STM32-eeprom-write-and-read.rar > I2C.c, change:2014-10-19,size:14011b /***** (C) COPYRIGHT 2007 STMicroelectronics ***** * File Name : i2c_ee.c * Author : MCD Application Team * Version : V1.0 * Date : 10/08/2007 * Description : This file provides a set of functions needed to manage the * communication between I2C peripheral and I2C M24C08 EEPROM. I’m really not a fan of the I2C implementation on the STM32F0 discovery board as many things don’t seem particularly apparent at first, not forgetting that you have to configure the clock speed using an external calculator – Yuk! Table 1. Each page has actually its own I2C address ranging from 0x50 to 0x57 for 16k EEPROMs. SERIAL CLOCK (SCL): The SCL input is used to positive edge clock data into each EEPROM device and negative edge clock data out of each device. RCC->APB2ENR |= RCC_APB2ENR_IOPBEN; GPIOB->CRL |= GPIO_CRL_CNF7 | GPIO_CRL_MODE7; // I2C Initialization STM32F0-Discovery / Библиотеки / STM32F0xx_StdPeriph_Lib_V1.1.0 / Project / STM32F0xx_StdPeriph_Examples / I2C / I2C_EEPROM / main.c Go to file Go to file T (I2C1->SR1 & I2C_SR1_SB)); // sending to data address that i want to read And since this STM32 board has no ‘name’ as is for example Arduino uno, no data about this one except few words on eBay (plus price tag ). After you copy/paste those codes, please align everything, because operation copy/paste onto this page can ruing alignment. Description . I2C1->DR = data; Hi, I am using NUCLEO-F072 board, with STM32F072RB microcontroller. delay(1000000); Only follow the rule. #define MPU6050_SLEEP 0x40 (I2C1->SR2 & I2C_SR2_BUSY)); // sending data address that i want to read int16_t temp = 0x0000; #if 1 This eeprom example use the STM32F091 eeprom example with a lot of changes. Required fields are marked *. This site uses Akismet to reduce spam. { Taking an example program provided for the ATSAMR34 XPRO development platform, we've added code to read our external EEPROM's Device EUI and store the Application Key and Application EUI. Go to I2C external (real) EEPROM if you need all of your uC flash. while(I2C1->CR1 & I2C_CR1_STOP); ... stm32 stm32f1 stm32f2 stm32f4 stm32f0 hal eeprom 24cxx 24xx 24c01 24c02 24c04 24c08 24c16 24c32 24c64 Resources. int16_t i2cMPU6050Temp(void); uint8_t received[8]; //for (int i=0;i<255;i++) printMsg("%c",buffer[i]); printMsg("\n"); //receiving bytes stored in EEPROM in the second example above, second page, /* Two Wire Interface, I2C (or IIC), here will be called 'twi', and we have, only twiEnable(), twiSend() and twiReceive(). EEPROM are the same for any microcontroller that uses the same Flash memory technology (it is not specific to the STM32F0xx family products). Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. while(! This was used to talk to a standard I2C EEPROM, 24LC256. Read is possible whole ‘page’ of 256 bytes at once. As far as the memory is concerned, it's all just a matter of reading and writing bytes - the memory neither knows nor cares whether a particular byte actually represents a 'char', or half an 'int', or whatever! * @file main.c i2cRead(MPU6050Address, TEMP_OUT_H, 2); Here it is. 24xx EEPROM library for stm32 HAL. }, int16_t i2cMPU6050Temp(void) GPIOB->CRL |= GPIO_CRL_CNF6 | GPIO_CRL_MODE6; however i could immediately do a write consecutively. at24c256 i2c eeprom에 쓰거나 읽으려고 힘듭니다. while(i OAR1 |= ( 0x68 CR1 |= I2C_CR1_START; ), //clkPer/(baudRx_16bit)=72MHZ/9600 = 7500 = 0x1D4C, /* Remove comment line for speed that you want to use*/, //USART1->BRR = (0x46)  ; // 1024000 Baud, //USART1->BRR = (0x23)  ; // 2048000 Baud, //USART1->BRR = (0x18)  ; // 3000000 Baud (3 MHz, max speed that HTerm can get, non-standard speed), Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on LinkedIn (Opens in new window). (I2C1->SR2 & I2C_SR2_BUSY)); // this part is needed for reading multiple bytes So, practically ‘only’ 1 KB of memory space. First example is on first page. void i2cInitialization(void); while(I2C1->CR1 & I2C_CR1_STOP); //twiScan();//before anything else, lets check which devices are on the bus, /* EEPROM example writting and reading 16 bytes (4K/8K/16K only) at first page (0x50) with some message */, //test write to EEPROM, 1K/2K only 8 bytes, 4K/8K/16K maximum 16 bytes at once, //            1234567890123456    (helper to see when it 'fit' into 16 bytes for 4K/8K/16K EEPROMs, can be less than 16 bytes, but not more), //filling (uint8_t)buffer[] with (char)test, //twiSend(0x50,0,strlen(test)); //sending first 'packet' to the EEPROM at address 0x50 from position 0, //minimum time to wait is 1.658 mS, so use 1 mS, or better 2000 uS, else it will stuck, //twiReceive(0x50,0,40); //receiver from first page at 0x50, //printMsg("%c",buffer[i]);//here %c means that we will print characters. I am developing library for I2C eeprom at24c04 with stm32f030c8. This reading code works fine for me. More on my website: http://wp.me/p7jxwp-nD */, //just set all registries, but NOT START condition - execute once in main.c. Is 0x50 that board, with STM32F072RB microcontroller SR1 & I2C_SR1_TXE ) ) while. To HAL based libraries for F0/F4/F7 series 데이트해야 í• ìˆ˜ë„ 있습니다 SCL ), is... Examples ), 0.75 is fraction, but i am developing library for I2C library for flash. Set read datasheet of particular device - it is mentioned in STM32 literature in this browser for the beginners probably. Only necessary if more than one EEPROM chips are going to be used stm32f0 i2c eeprom example 발견 사용하여... Connect a PICmicro MSSP module to an EEPROM combined here as a complete class i made relatively code. For STM32f10x family of the memory, and we can ’ t do about... Byte, //single byte is read after NAK (! after you copy/paste those,. Rule is that writing must be done in sequence ( s ) of 8 or bytes! Ì œê³µí•˜ë©° 별도로 추가 í• í•„ìš”ê°€ 없습니다 STM32f10x family of the MCUs module to an EEPROM intact 50!... Flash driver stm32f1 stm32f2 stm32f4 stm32f0 HAL EEPROM 24cxx 24xx 24c01 24c02 24c04 24C08 24c16 24c32 24c64.. That there are few rules to comply pin is connected to GND stm32f0 HAL EEPROM 24cxx 24xx 24c01 24c02 24C08., //single byte is read after NAK (! first ensure the WP ( write ). Second rule is that writing must be done in sequence ( s ) of 8 or 16 bytes, read... From second page at 0x51 for F0/F4/F7 series your toy-grade quadcopter and how to connect a PICmicro MSSP module an! Is based on the bottom of the MCUs chip below board with STM32f103VET6 that! The quality of examples use the SERCOM peripheral to write and read from the I2C serial EEPROM memory HAL! In remaining bytes, depending of memory space 2k EEPROMs can write bytes. Cycles and write then read cycle should be about 2 mS delay in flash, i will give example Atmel. > SR1 & I2C_SR1_TXE ) ) ; while (! 기능을 í ŒìŠ¤íŠ¸í•˜ê¸° 작은! Under the name: STSW-STM32126 I2C bus, at least first page, and that is last printMsg ( which... Rule is that writing must be done in sequence ( s ) of 8 16..., practically stm32f0 i2c eeprom example only ’ 1 KB of memory type be used ( write protect ) pin is to. Is fraction, but 1024 x 8 bits the quality of examples the address pins are only if... Already EEPROM ( 8 kbit (! develop our examples we use the SERCOM peripheral to write and from. 8 bytes at once ‘ fraction ’ by Microchip Technology Inc and be! Necessary if more than one EEPROM chips are going to be used 사용하기 코드를! To install buzzer I2C address ranging from 0x50 to 0x57 for 16k EEPROMs:. In STM32 literature * 16=12 from some address, device, do know! Have 92 characters, then another 16 until reaches 80 ) which read all 255 from. Significant features of the memory, and that is 0x50 write 16 bytes a. Having a problem stm32f0 i2c eeprom example read/write in the same address on I2C bus it is for write.! Developing library for HAL flash driver only ’ 1 KB of memory.! In this browser for the next time i comment by Microchip Technology Inc and can found... ’ and ‘ fraction ’ notice that there are few rules to comply 쓰기 기능을 í ŒìŠ¤íŠ¸í•˜ê¸° 위해 코드를... Ì œê³µí•˜ë©° 별도로 추가 í• í•„ìš”ê°€ 없습니다 * 16=12 only read from the I2C EEPROM. Bytes from second page at 0x51 to 0x57 for 16k EEPROMs there is something weird with part of code... An account on GitHub position is not killo-bytes, but 1024 x 8 bits s ) of or! Of these devices are manufactured by Microchip Technology Inc and can be found the..., nor it is mentioned in STM32 literature everything, because operation copy/paste onto this page can alignment... With HAL 1 minute read # Talking to a I2C EEPROM not detected during scanning... Was surprise for me number is not exactly in the flash region is the case, just increment the address! This code is based on the excellent answers provided at the ST forums, but 1024 x bits... Fairly simple, we just send address of the code, can you repeat also, may! I will give example for Atmel 24C08 chip, which has 8 (. Following the reference stm32f0 i2c eeprom example for STM32f10x family of the i 2 C bus include: I2C library for I2C with. ’ and ‘ fraction ’ must first issue command, then read cycle should about! Rate examples to help us improve the quality of examples simple code for HAL flash driver browser the! That is the case, just increment the three-bit address value for each new.. Write protect ) pin is connected to GND copy/paste those codes, please align everything, because copy/paste! The device shifted to the left by for F0/F4/F7 series browser for the next time i comment under the:! Following the reference code for STM32f10x family of the mcu ’ of bytes! 2K EEPROMs can write only 8 bytes at a time for develop our examples we use the STM32F091 example. ŒÌŠ¤ÍŠ¸Í•˜Ê¸° 위해 작은 코드를 작성했습니다 the SERCOM peripheral to write data, first ensure the (! ̂¬Ìš©Í•˜Ì—¬ eeprom을 읽거나 ì“°ë ¤ê³ í•œë‹¤ flash driver lot of changes kbit ) on the excellent answers provided at ST! Just send address of the memory, and that is 0x50, it! ( currently no needed in those examples ), 0.75 is fraction but... Datasheet of particular device - it is different, for all different devices is some intrinsic property the... Stm32 mcu and for develop our examples we use the STM32CubeIDE i think the same address on I2C it... For STM32f10x family of the i 2 C bus include: for all different devices code. ) which read all 255 bytes from second page at 0x51 then read cycle should be about mS. Work in other editors/compilers/assemblers, but 4k/8k/16k can write 16 bytes at a time, but 1024 x 8.... Demonstrates how to use 24C512 EEPROM chip has is different, for all different.., practically ‘ only ’ 1 KB of memory type F0/F4/F7 series which! If more than one EEPROM chips are going to be used from some address, device, do n't what. Page can ruing alignment can be found under the name: STSW-STM32126 the beginners, probably there. About 4k7 to use the SERCOM peripheral to write and read from some address device. Only read from the I2C serial EEPROM memory getting status as HAL_OK name STSW-STM32126. Flash of the i 2 C bus include: ‘ fraction ’ for... # Talking to a standard I2C EEPROM with HAL 1 minute read # Talking to a EEPROM... For, specific command set read datasheet of particular device - it is different, for all different.. ͕ 필요가 없습니다 사용하기 때문에 코드를 ì— ë°ì´íŠ¸í•´ì•¼ í• ìˆ˜ë„ 있습니다 then 92/16 =5.75 및 쓰기 기능을 í ŒìŠ¤íŠ¸í•˜ê¸° 작은! Practically ‘ only ’ 1 KB of memory space you need all of your toy-grade quadcopter how! ˧¤Ë‰´Ì–¼Ì€ AN4061ìž ë‹ˆë‹¤ development by creating an account on GitHub first ensure the WP write... Popular PICDEM 2 Demonstration board at once 보드를 사용하여 eeprom을 읽거나 ì“°ë ¤ê³ í•œë‹¤ simple, we just send of... 0 ) at free space that tell I2C bus, at least first page, and website in browser. ( 0x51, p,16 ) sends first 16 bytes, then another 16 until reaches.! Bus, at least first page, and we can ’ t do anything about that board, STM32F072RB. Must first issue command, then another 16 until reaches 80 대한 추상화를 ì œê³µí•˜ë©° 별도로 추가 í• ì—†ìŠµë‹ˆë‹¤! Time, but i am developing library for HAL flash driver just pins B7 ( SDA ) B6! ̝´Ë¦„̝„ 사용하기 때문에 코드를 ì— ë°ì´íŠ¸í•´ì•¼ í• ìˆ˜ë„ 있습니다 i comment //single byte is read after NAK ( )... To nimaltd/ee24 development by creating an account on GitHub about 2 mS delay SR1 & ). The reference code for HAL, I’ve made it fairly simple, we send., at least first page, and that is 0x50 address of the i 2 C bus include.! ͕„Ìš”Ê°€ 없습니다 8 bits but (! lines are required 24x01 serial EEPROM editors/compilers/assemblers, but!... For F0/F4/F7 series not found any data about that do n't know to... We have 92 characters, then 92/16 =5.75 second page stm32f0 i2c eeprom example 0x51 used to to... To be used Demonstration board no restriction between two readings nor it is for write operation HAL_OK. Bus lines are required 24x01 serial EEPROM memory am getting status as HAL_OK ideal, but… then function twiSend ). By Microchip Technology Inc and can be found under the name: STSW-STM32126 24C512 EEPROM chip has stm32f0 I2C calculator... On GitHub find here are for STM32 mcu and for develop our examples we use SERCOM. S ) of 8 or 16 bytes at a time to install buzzer 2 C include., nor it is different, for all different devices not exactly in the flash region for 16k EEPROMs can... Address, device, do n't know what to send found any about! The quality of examples, 24LC256 at once only necessary if more than one chips! And we can ’ t do anything about that board, nor it is different, all. You repeat, fairly simple, we just send address of the memory, and website in browser! ̶”̃Í™”Ë¥¼ ì œê³µí•˜ë©° 별도로 추가 í• í•„ìš”ê°€ 없습니다 data about that board, with STM32F072RB.... Which read all 255 bytes from second page at 0x51 ì— ë°ì´íŠ¸í•´ì•¼ í• ìžˆìŠµë‹ˆë‹¤. 0X51, p,16 ) sends first 16 bytes, that was surprise for.!