kriswiner
commented
5 years ago Isn't this the same problem you had before, I thought you fixed this?
Try using different ESP32 pins as interrupts, and make sure to define them in the sketch.
On Sat, Apr 27, 2019 at 3:12 AM shomedas notifications@github.com wrote:
I am trying to get two MPU9255 to work with an ESP32 on a single I2C bus. I use your code at https://github.com/kriswiner/MPU9250/tree/master/Dual_MPU9250 http://url .
The code works fine only if I comment two lines reading the interrupt in the main loop if(intFlag1 == true) { ...} if(intFlag2 == true) { ...}
Otherwise either one or both MPU readings will be stuck and condition(intFlag == true ) is always false for one or both of the IMUs. This implies that interrupt reading is not set properly. I realize that two registers need to be set. INT_PIN_CFG and INT_ENABLE. In your code it is
writeByte(MPUnum, INT_PIN_CFG, 0x10); // INT is 50 microsecond pulse and any read to clear writeByte(MPUnum, INT_ENABLE, 0x01); // Enable data ready (bit 0) interrupt
What are the correct values for INT_PIN_CFG & INT_ENABLE for the dual MPU9250 on a single I2C bus
My connection:
MPU9255 -- ESP32 SDA -- 21 SCL -- 22 Vcc -- 3.3 V Gnd -- Gnd Fsyns -- Gnd NCS -- 3.3V
AD0 to Vcc(IMU1) AD0 to Gnd(IMU2) Intpin1 =D2 Intpin1 =D4
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shomedas
I am trying to get two MPU9255 to work with an ESP32 on a single I2C bus. I use your code at https://github.com/kriswiner/MPU9250/tree/master/Dual_MPU9250.
The code works fine only if I comment two lines reading the interrupt in the main loop if(intFlag1 == true) { ...} if(intFlag2 == true) { ...}
Otherwise either one or both MPU readings will be stuck and condition(intFlag == true ) is always false for one or both of the IMUs. This implies that interrupt reading is not set properly. I realize that two registers need to be set. INT_PIN_CFG and INT_ENABLE. In your code it is
writeByte(MPUnum, INT_PIN_CFG, 0x10); // INT is 50 microsecond pulse and any read to clear
writeByte(MPUnum, INT_ENABLE, 0x01); // Enable data ready (bit 0) interrupt
What are the correct values for INT_PIN_CFG & INT_ENABLE for the dual MPU9250 on a single I2C bus
The register map for mpu9255 has bits assigned to particular functions for the INT_PIN_CFG & INT_ENABLE registers. Which functions do we need to choose for the dual 9250 configuration Which of these need to set to 0 or 1? Also do we need to use any other register for the dual IMU interrupt setting?
My connection:
MPU9255 -- ESP32 SDA -- 21 SCL -- 22 Vcc -- 3.3 V Gnd -- Gnd Fsyns -- Gnd NCS -- 3.3V
AD0 to Vcc(IMU1) AD0 to Gnd(IMU2) Intpin1 =D2 Intpin1 =D4