{Update} Can I suggest an update the to I2C tester.ino #51
Description
On my journey of finding out what is wrong with the 8Servo units that I have, I have needed to get my head around I2C ports and how to scan them.
As the StickC and StickC-Plus have two ports, I modified your I2C_tester.ino code so that I can toggle between the ports, after a restart
This is the script I used for the M5StickC
Pressing Button A will set it to the TOP / HAT I2C port and restart
Pressing Button B will set it to the Bottom / Grove port and restart
It's not pretty code, but it does work.
I just wish I could get the 8Servo (or in fact the Servo Hat) to work.
/*
*******************************************************************************
* Copyright (c) 2021 by M5Stack
* Equipped with M5StickC sample source code
* 配套 M5StickC 示例源代码
* Visit for more information: https://docs.m5stack.com/en/core/m5stickc
* 获取更多资料请访问: https://docs.m5stack.com/zh_CN/core/m5stickc
*
* Describe: I2C Scanner. I2C探测
* Date: 2021/7/27
*******************************************************************************
*/
/*
This program scans the addresses 1-127 continuosly and shows the devices found
on the TFT. 该程序连续扫描地址 1-127 并显示在外部(内部)I2C发现的设备。
*/
#include <M5StickC.h>
#include <Preferences.h>
Preferences preferences;
int I2C_SDA = 0;
int I2C_SCL = 26;
bool releaseA = false;
bool releaseB = false;
bool portName = 1;
String portNameAlias = "Top Port";
int textColor = YELLOW;
void btn_task(void *arg) { // set this VOID as a task, to run outside of LOOP
while (1) {
if (M5.BtnA.wasPressed() ) {
releaseA = !releaseA;
Serial.println("Chaneg Define");
// Wire.end();
// delay (300);
// Wire.begin(0, 26); // Detect external I2C, Top pins if this sentence is added,
I2C_SDA = 0;
I2C_SCL = 26;
Serial.println("TOP I2C port activated");
M5.Lcd.setCursor(0, 0);
M5.Lcd.println(" RESTARTING ");
portName = 1;
// Store the counter to the Preferences
preferences.putUInt("I2C_SDA", I2C_SDA );
preferences.putUInt("I2C_SCL", I2C_SCL );
preferences.putBool("portName", portName);
// Close the Preferences
preferences.end();
delay(300);
ESP.restart();
}
if (M5.BtnB.wasPressed() ) {
releaseB = !releaseB;
Serial.println("Chaneg Define");
// Wire.end();
// delay (300);
// Wire.begin(33, 32); // Detect external I2C, Top pins if this sentence is added,
I2C_SDA = 32;
I2C_SCL = 33;
Serial.println("Bottom Grove I2C port activated");
M5.Lcd.setCursor(0, 0);
M5.Lcd.println(" RESTARTING ");
portName = 0;
// Store the counter to the Preferences
preferences.putUInt("I2C_SDA", I2C_SDA );
preferences.putUInt("I2C_SCL", I2C_SCL );
preferences.putBool("portName", portName);
// Close the Preferences
preferences.end();
delay(300);
ESP.restart();
}
M5.update();
vTaskDelay(20);
}
}
void setup() {
M5.begin(); // Init M5StickC(Init of external I2C is also included ).
// 初始化M5StickC(初始化外部I2C也包含在内)
Serial.begin(9600);
Serial.println(" ");
Serial.println(" Hello World ");
Serial.println(" ");
preferences.begin("I2C", false);
I2C_SDA = preferences.getUInt("I2C_SDA", 0); // 0 is incase the prefer does not exist
I2C_SCL = preferences.getUInt("I2C_SCL", 26); // 26 is incase the prefer does not exist
Wire.begin(I2C_SDA, I2C_SCL);
portName = preferences.getBool("portName", 1); // 1 is incase the prefer does not exist, changed later to Top or BASE
if (portName){
portNameAlias = "Top Port";
}
else {
portNameAlias = "Base Port";
}
Serial.println( " I2C Pins in use - SDA = "+String(I2C_SDA)+" , SCL = "+String(I2C_SCL) );
// Wire.begin(); // Init wire and join the I2C network. // joins Grove port by default
// Wire.begin(0, 26); // Detect external I2C, Top pins if this sentence is added,
// Wire.begin(33,32); //Detect external I2C, Grove port if this sentence is added,
M5.Lcd.setTextColor(
YELLOW); // Set the font color to yellow. 设置字体颜色为黄色
M5.Lcd.setRotation(3); // Rotate the screen. 旋转屏幕
// M5.Lcd.println("M5StickC I2C Tester"); // Print a string on the screen.
// 在屏幕上打印字符串
Serial.println("M5StickC I2C Tester - "+portNameAlias);
// Serial.println("M5StickC I2C Tester - Bottom Port ");
delay(3000);
M5.Lcd.fillScreen(
BLACK); // Make the screen full of black (equivalent to clear() to
// clear the screen). 使屏幕充满黑色(等效clear()清屏)
xTaskCreate(btn_task, /* Task function. */
"btn_task", /* String with name of task. */
8096, /* Stack size in bytes. */
NULL, /* Parameter passed as input of the task */
1, /* Priority of the task. */
NULL); /* Task handle. */
}
void loop() {
scanI2C();
delay(200);
}
void scanI2C() {
// Wire.begin(I2C_SDA, I2C_SCL);
int address;
int error;
M5.Lcd.setCursor(0, 0);
M5.Lcd.println("scan "+portNameAlias+" [HEX]");
// M5.Lcd.println("scan Base port [HEX]");
Serial.println(" 'END' "+portNameAlias+" ");
Serial.println(" New Scan >> ");
for (address = 1; address < 127; address++) {
Wire.beginTransmission(
address); // Data transmission to the specified device address
// starts. 开始向指定的设备地址进行传输数据
error = Wire.endTransmission(); /*Stop data transmission with the slave.
停止与从机的数据传输 0: success. 成功 1: The amount of data
exceeds the transmission buffer capacity limit.
数据量超过传送缓存容纳限制 return value: 2:
Received NACK when sending address. 传送地址时收到 NACK 3:
Received NACK when transmitting data. 传送数据时收到 NACK
4: Other errors. 其它错误 */
if (error == 0) {
M5.Lcd.print(address, HEX); // show the Decimal address as a HEX value
M5.Lcd.print(" ");
Serial.print("Found @ 0x");
Serial.print(address,HEX); // show the Decimal address as a HEX value
Serial.print(" & ");
} else
M5.Lcd.print(".");
// Serial.println(" ----- ");
delay(10);
}
if (textColor == YELLOW) {
textColor = CYAN;
} else
textColor = YELLOW;
M5.Lcd.setTextColor(textColor,
BLACK); // Set the foreground color of the text to
// textColor and the background color to BLACK.
// 设置文字的前景色为textColor背景色为BLACK
}