Reconfig SDA & SCL to NON Default pins on ESP32-CAM AI-Thinker board, Why is this NOT Working for PCF8574 Library #71
Description
gives problems with the PCF8574 while the SSD display works fine with it:
Monitoring loop Started..
Init pcf8574...OK
but after constantly changing the content of the display (Seconds wise), all interrupts of the PCF8574 gives :
[ 55886][E][Wire.cpp:513] requestFrom(): i2cRead returned Error 263
Please tell me what am I doing wrong ??
#include <Arduino.h>
#include <stdint.h>
#include <esp_camera.h>
//* for I2C
#include <Wire.h>
TwoWire I2C_PINS_NON_DEFAULT = Wire1; // Try to reconfig the wire Lib to use NON Default Pins
#define SCL 15 // IO15 GPIO15 HSPI_WSO HS2_CMD SD-Conn
#define SDA 14 // IO14 GPIO14 HSPI_CLK HS2_CLK SD-Conn
#define SETBUSSPEED // We do want to set the BusSpeed
#undef SETBUSSPEED // We do NOT want to set the BusSpeed
#ifdef SETBUSSPEED
#define BUSSPEED 100000U // BusSpeed = 100.000 kHz
// #define BUSSPEED 400000U // BusSpeed = 400.000 kHz
#endif
//* SDD1306 Config
#include <U8x8lib.h> // I2C (Maximum Speed SCL +/- 400 kHz) // ! Text Only Library
U8X8_SSD1306_128X64_NONAME_SW_I2C u8x8(/* clock=*/ SCL, /* data=*/ SDA, /* reset=*/ U8X8_PIN_NONE); // ! Text Only (from long list)
//* PCF8574 MultiClick
#include "PCF8574.h"
#define PCF_INTERRUPT 0 // IO0 GPIO0 CAM_PIN_XCLK or CSI_MCLK (Interrupt pin for Encoder & Switch)
// * RotaryEncoder defines (Connected to PCF8574)
#define encoderPinA P0
#define encoderPinB P1
#define switchPin P2
// Forward declaration for the Interrupt (See Initialisation of isr_updateEncoder ISR Below),
// necessary here because of the Interrupt Initialisation in the next Line
void IRAM_ATTR isr_updateEncoder();
// Initialize PCF-library for used address, SDA & SCL, Interrupt function
PCF8574 pcf8574(0x38, SDA, SCL, PCF_INTERRUPT, isr_updateEncoder);
void IRAM_ATTR isr_updateEncoder() {
//! DO NOT Read pcf8574.readEncoderValue(encoderPinA, encoderPinB, &encoderValue);
//! and pcf8574.digitalRead(switchPin); in the isr_updateEncoder() function here !!!
//! this will cause "Guru Meditation Error: Core 1 panic'ed (Interrupt wdt timeout on CPU1)"
//! Keep the interrupt function as short as possible and only set a flag here !!!
//! Next in the main loop() DO Read these values by the function getEncValues() and checkButton() !!!
changed = true;
}
void ClrScr() {
// ! *** See : https://github.com/olikraus/u8g2/wiki/u8x8reference
u8x8.clear();
delay(50);
u8x8.clearDisplay();
delay(50);
u8x8.setFont(u8x8_font_chroma48medium8_r); // Normal=1, Larger=2, largest=3, :1 pixel scale
delay(50); // See : https://github.com/olikraus/u8g2/wiki/fntlist8x8
u8x8.print(""); // Draw text
delay(50);
u8x8.flush();
delay(50);
}
void Display_Init() { // ! *** Text Only
u8x8.begin(); // Start the Display Object, with NO PowerSaving
delay(250); // ! *** Extended delay 50 ==> 250 : See datasheet 18-12-2023 page 18 & 32
u8x8.initDisplay();
delay(50);
u8x8.setPowerSave(0); // Seems essentieel, for correct new start !!!
delay(50);
ClrScr();
}
void Display_Text(byte XPos, byte YPos, bool Invert, byte FieldSize, String MyText) {
// u8x8 library only has LineMode (TEXT Only), for graphics use u8g2 library !!!
// ! *** When using Graphics we are adressing X and y at pixel level !!!
// ! *** When using Text Only we are adressing X and y at line level !!!
// Set Font
u8x8.setFont(u8x8_font_chroma48medium8_r); // Small FontSize - 16 char/line
// See : https://github.com/olikraus/u8g2/wiki/fntlist8x8
// Set Normal / Inverse
if (Invert == false) {
u8x8.setInverseFont(0); // Draw 'normal' text
} else {
u8x8.setInverseFont(1); // Draw 'inverse' text
}
String NewStr = MyText; // Set for when FieldSize is set to 0 (NO Size Control) OR Correct !!!
if (FieldSize != 0) {
// Control the Length of the Text Field
if (MyText.length() > FieldSize) {
// MyText too long
NewStr = "";
for (size_t i = 1; i < FieldSize; i++) NewStr = NewStr + MyText[i];
}
if (MyText.length() < FieldSize) {
// MyText too short
NewStr = MyText;
while (NewStr.length() < FieldSize) NewStr = NewStr + " ";
}
}
u8x8.drawString(XPos, YPos, NewStr.c_str());
u8x8.flush();
}
void setup() {
//* Init Serial
Serial.begin(115200);
delay(3000); //! We Need at least 3 seconds to start up the serial port for monitoring @ ESP32-Cam in PlatformIO !!!
I2C_PINS_NON_DEFAULT.begin(SDA, SCL);
//* Init OLED-Display
Display_Init(); // Initialize the display and Start Showing the Information
// Show texts @ the SSD Display
mText = "Config.Finished.";
Display_Text(0, 1, false, 16, mText);
mText = "M.A.W.M. Nijland";
Display_Text(0, 3, false, 16, mText);
mText = "Apeldoorn - 2024";
Display_Text(0, 5, false, 16, mText);
Serial.println("\nMonitoring loop Started..");
Serial.flush();
//* Initialize ESP-CAM Interrupt Input
pinMode(PCF_INTERRUPT, INPUT_PULLUP);
//* Init PCF8574 pins
pcf8574.pinMode(encoderPinA, INPUT_PULLUP); // Encoder A
pcf8574.pinMode(encoderPinB, INPUT_PULLUP); // Encoder B
// Encoder pins
pcf8574.encoder(encoderPinA, encoderPinB);
// Encoder button
pcf8574.pinMode(switchPin, INPUT_PULLUP);
delay(100);
// Start the PCF8574 library
Serial.print("Init pcf8574...");
if (pcf8574.begin(0x38)) {
// Board/Chip is Acknowledging the I2C Commands
Serial.println("OK");
} else {
// Board/Chip is NOT Acknowledging the I2C Commands
Serial.println("NOT OK");
}
}
loop() {
// etc. etc..
}