AIR001的I2C作从机，接收主机用Wire.write发送过来的数据异常

[luckycheng2017]

描述一下这个bug / Describe the bug

两块板子，一块是ESP32C3，另一块是AIR001，用I2C连接，有接上拉电阻。ESP32C3作主机，AIR001作从机。ESP32C3主机用Wire.write方法发送操作多个字节的数据时，反馈结果是2，AIR001从机那边没有收到数据。之前 #34 这个bug有提过，但是没彻底解决。

复现步骤 / To Reproduce

从机先复位，然后主机复位，主机能找到从机的地址，从机没有收到主机发送过来的数据。

如果正常，应该是什么样 / Expected behavior

正常AIR001从机能够读取到ESP32主机发过来的数据。

截图 / Screenshots

ESP32C3主机代码： ` #include <Wire.h>

#define I2C_slave_ADDR 0x08

uint8_t hello[] = {1, 2, 3, 4, 5, 6}; uint8_t aTxBuffer[] = "你好"; uint8_t myBuffer[10];

void setup() { Wire.setClock(100000); Wire.begin(4, 5);

Serial.begin(9600);

byte error, address; int nDevices; Serial.println("Scanning..."); nDevices = 0; for(address = 1; address < 127; address++ ) { Wire.beginTransmission(address); error = Wire.endTransmission(); if (error == 0) { Serial.print("I2C device found at address 0x"); if (address<16) { Serial.print("0"); } Serial.println(address,HEX); nDevices++; } else if (error==4) { Serial.print("Unknow error at address 0x"); if (address<16) { Serial.print("0"); } Serial.println(address,HEX); }
} if (nDevices == 0) { Serial.println("No I2C devices found\n"); } else { Serial.println("done\n"); } }

void loop() { Wire.beginTransmission(I2C_slave_ADDR); Wire.write((uint8_t *) hello, sizeof(hello)); Serial.print("发送:"); Serial.println(Wire.endTransmission()); delay(2000); }

`

AIR001从机代码 ` #include <Wire.h>

#define I2C_ADDR 0x08

uint8_t hello[] = {1, 2, 3}; uint8_t aTxBuffer[] = "你好";

// function that executes whenever data is received from master // this function is registered as an event, see setup() void receiveEvent(int howMany) { while(1 < Wire.available()) // loop through all but the last { int c = Wire.read(); // receive byte as a character Serial.println(c); // print the character } int x = Wire.read(); // receive byte as an integer Serial.println(x); // print the integer }

// function that executes whenever data is requested by master // this function is registered as an event, see setup() void requestEvent() {
int res = Wire.write((uint8_t *) hello, sizeof(hello)); Serial.print("发送数据, res = "); Serial.println(res); }

void setup() { Serial.begin(9600); // start serial for output

Wire.setSDA(PF_0); Wire.setSCL(PF_1); Wire.setClock(100000); Wire.begin((int) I2C_ADDR, false, true); // join i2c bus with address #4 Wire.onReceive(receiveEvent); // register event Wire.onRequest(requestEvent); // register event }

void loop() { //empty loop } `

日志 / Logs

主机日志：

从机日志：

系统 / System

Win10

PACK包版本 / Version

0.4.5

验证

• [X] 检查过该问题，之前没有人提过 / Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• [X] 提供了最小可复现工程或详细的复现步骤，确保开发者可以复现 / The provided reproduction is a minimal reproducible example of the bug.
• [X] 已经提供了完整的报错信息、日志、截图，没有经过删减。