lesept:
En lisant le code de la bibli que tu utilises, j'ai l'impression qu'il suppose que ton capteur I2C est à l'adresse 0x68 (ou peut-être 0x0C). L'as-tu vérifié avec un scanner ? Il y en a un pour le Lolin32 lite ici.
Si le scanner indique une autre adresse, je suppose qu'il faudra ajouter une ligne
mySensor.i2cWriteByte(adresse);
dans le setup (à confirmer, le code est difficile à comprendre)
Merci de tenter de me dépanner
Le scanner avec le code
/* I2C slave Address Scanner
for 5V bus
* Connect a 4.7k resistor between SDA and Vcc
* Connect a 4.7k resistor between SCL and Vcc
for 3.3V bus
* Connect a 2.4k resistor between SDA and Vcc
* Connect a 2.4k resistor between SCL and Vcc
*/
#include <Wire.h>
#ifdef _ESP32_HAL_I2C_H_
#define SDA_PIN 26
#define SCL_PIN 25
#endif
void scan(){
Serial.println(" Scanning I2C Addresses");
uint8_t cnt=0;
for(uint8_t i=0;i<128;i++){
Wire.beginTransmission(i);
uint8_t ec=Wire.endTransmission(true);
if(ec==0){
if(i<16)Serial.print('0');
Serial.print(i,HEX);
cnt++;
}
else Serial.print("..");
Serial.print(' ');
if ((i&0x0f)==0x0f)Serial.println();
}
Serial.print("Scan Completed, ");
Serial.print(cnt);
Serial.println(" I2C Devices found.");
}
bool i2cReady(uint8_t adr){
uint32_t timeout=millis();
bool ready=false;
while((millis()-timeout<100)&&(!ready)){
Wire.beginTransmission(adr);
ready=(Wire.endTransmission()==0);
}
return ready;
}
void eepromSize(){
Serial.println("Discovering eeprom sizes 0x50..0x57");
uint8_t adr=0x50,i;
uint16_t size;
char buf[64];
while(adr<0x58){
i=0;
size = 0x1000; // Start at 4k
i += sprintf_P(&buf[i],PSTR("0x%02X: "),adr);
if(i2cReady(adr)) { // EEPROM answered
uint8_t zeroByte;
Wire.beginTransmission(adr);
Wire.write((uint8_t)0); // set address ptr to 0, two bytes High
Wire.write((uint8_t)0); // set address ptr to 0, two bytes Low
uint8_t err=Wire.endTransmission();
if(err==0){// worked
err=Wire.requestFrom(adr,(uint8_t)1);
if(err==1){// got the value of the byte at address 0
zeroByte=Wire.read();
uint8_t saveByte,testByte;
do{
if(i2cReady(adr)){
Wire.beginTransmission(adr);
Wire.write(highByte(size)); // set next test address
Wire.write(lowByte(size));
Wire.endTransmission();
err=Wire.requestFrom(adr,(uint8_t)1);
if(err==1){
saveByte=Wire.read();
Wire.beginTransmission(adr);
Wire.write(highByte(size)); // set next test address
Wire.write(lowByte(size));
Wire.write((uint8_t)~zeroByte); // change it
err=Wire.endTransmission();
if(err==0){ // changed it
if(!i2cReady(adr)){
i+=sprintf_P(&buf[i],PSTR(" notReady2.\n"));
Serial.print(buf);
adr++;
break;
}
Wire.beginTransmission(adr);
Wire.write((uint8_t)0); // address 0 byte High
Wire.write((uint8_t)0); // address 0 byte Low
err=Wire.endTransmission();
if(err==0){
err=Wire.requestFrom(adr,(uint8_t)1);
if(err==1){ // now compare it
testByte=Wire.read();
}
else {
testByte=~zeroByte; // error out
}
}
else {
testByte=~zeroByte;
}
}
else {
testByte = ~zeroByte;
}
//restore byte
if(!i2cReady(adr)){
i+=sprintf_P(&buf[i],PSTR(" notReady4.\n"));
Serial.print(buf);
adr++;
break;
}
Wire.beginTransmission(adr);
Wire.write(highByte(size)); // set next test address
Wire.write(lowByte(size));
Wire.write((uint8_t)saveByte); // restore it
Wire.endTransmission();
}
else testByte=~zeroByte;
}
else testByte=~zeroByte;
if(testByte==zeroByte){
size = size <<1;
}
}while((testByte==zeroByte)&&(size>0));
if(size==0) i += sprintf_P(&buf[i],PSTR("64k Bytes"));
else i+=sprintf_P(&buf[i],PSTR("%dk Bytes"),size/1024);
if(!i2cReady(adr)){
i+=sprintf_P(&buf[i],PSTR(" notReady3.\n"));
Serial.print(buf);
adr++;
continue;
}
Wire.beginTransmission(adr);
Wire.write((uint8_t)0); // set address ptr to 0, two bytes High
Wire.write((uint8_t)0); // set address ptr to 0, two bytes Low
Wire.write(zeroByte); //Restore
err=Wire.endTransmission();
}
else i+=sprintf_P(&buf[i],PSTR("Read 0 Failure"));
}
else i+=sprintf_P(&buf[i],PSTR("Write Adr 0 Failure"));
}
else i+=sprintf_P(&buf[i],PSTR("Not Present."));
Serial.println(buf);
adr++;
}
}
void setup(){
Serial.begin(115200);
#ifdef _ESP32_HAL_I2C_H_ // For ESP32
Wire.begin(SDA_PIN, SCL_PIN); // SDA, SCL
#else
Wire.begin();
#endif
scan();
Serial.println();
eepromSize();
}
void loop(){}
donne :
ets Jun 8 2016 00:22:57
rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:812
load:0x40078000,len:0
load:0x40078000,len:11572
entry 0x40078a5c
Scanning I2C Addresses
.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Scan Completed, 0 I2C Devices found.
Discovering eeprom sizes 0x50..0x57
0x50: Not Present.
0x51: Not Present.
0x52: Not Present.
0x53: Not Present.
0x54: Not Present.
0x55: Not Present.
0x56: Not Present.
0x57: Not Present.
J'ai corrigé comme
https://desire.giesecke.tk/index.php/2018/04/20/how-to-use-stickbreakers-i2c-improved-code/ l'indique.
J'ai des résistances de pull-up sur sda et scl de 3K pourtant jamais je vois de montage avec.
La doc
MPU-9250 Hookup Guide - SparkFun Learn porte-t-elle sur le même circuit que le mien ?
mySensor.i2cWriteByte(adresse);
...adresse ?
https://sites.google.com/site/hardzet/home/arduino/gy-9250-mpu-9250 montre un montage en SPI mais je n'ai pas trouvé un code pour tester...
Vala vala...
