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how to connect to mpu6050 gyro sensor-i2c?
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ROBO12

Joined: 28 Aug 2012
Posts: 4

Posted: Sun Sep 02, 2012 4:20 am

Ttelmah wrote:

You have to send the device address again after a restart.

Sequence is:

start
device address with direction bit set to write
register address
data to go to register (optional - remember register will normally increment)
restart
device address with direction bit set to read
read data from register
stop.

Best Wishes

sorry.I forgot
but

this code is not Not working :

Code:

#include <16F877a.h>
#use delay(clock=4000000)
#define use_portb_lcd TRUE
#define LCD_ENABLE_PIN PIN_D2
#define LCD_RS_PIN PIN_D0
#define LCD_RW_PIN PIN_D1
#define LCD_TYPE 2
#use I2C(master,sda=PIN_C4,scl=PIN_C3,slow,restart_wdt)
#include <lcd.c>

void main()
{

set_tris_b(0x00);
lcd_init();
int8 x;

while(true)
{

i2c_start();
i2c_write(0xd0);
i2c_write(0x3c);
i2c_start();
i2c_write(0xd1);
x=i2c_read(0);
i2c_stop();

lcd_gotoxy(1,1);
printf(lcd_putc,"%u",x);

}
}

pictrance

Joined: 18 Jul 2010
Posts: 14
Location: Puebla, Mexico

Posted: Sat Nov 03, 2012 1:57 pm

Hello, you can try this code

Code:

#include <18f2550.h> //PIC utilizado
#device adc=10
#fuses HSPLL,NOWDT,NOPROTECT,NOLVP,NODEBUG,USBDIV,PLL5,CPUDIV1,VREGEN
#use delay(clock=48M)

//Pal bootloader
#build (reset=0x1000,interrupt=0x1008)
#org 0x0000,0x0FFF{}

#use i2c(Master,fast,sda=PIN_A5,scl=PIN_A4)
//#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)
#include "lcd20x4.c"

//La dirección del sensor se basa en el PIN AD0 del MPU6050
//es 0b11010010 sí el pin AD0 esta en 1, es 0b11010000 si el Pin AD0 esta en 0
#define MPU6050_W 0b11010010
#define MPU6050_R 0b11010011
#define MPU6050_RA_WHO_AM_I 0x75 //quien soy

void main(){
int8 x1;
SETUP_ADC(ADC_OFF);
lcd_init();
lcd_putc("\fSensor\nMPU6050");
delay_ms(500);

i2c_start();
i2c_write(MPU6050_W);
i2c_write(MPU6050_RA_WHO_AM_I);
i2c_start();
i2c_write(MPU6050_R);
x1=i2c_read(0);
i2c_stop();
Printf(lcd_putc, "\f0x%x", x1); //el resultado debe ser 0x68
while(true){
}
}

por el momento el sensor ya me responde, lo que no consigo es que me mande los datos del gyros y el acelerometro

saludos
_________________
Si el proyecto tiene mal olor es de Química, Si echa humo negro es de Mecánica, Si es verde o se retuerce es de Bioingenieria Y si no funciona es de Electrónica.. :p ... no es mia la frase, pero me gusto.

germin01

Joined: 29 Nov 2012
Posts: 1

Posted: Thu Nov 29, 2012 12:14 pm

bkamen wrote:

Ttelmah wrote:

No, the reason that only software will work, is the input, not the output.
The hardware MSSP (I2C) module has a Vih, of 0.8* the PIC's Vdd. So with a 5v PIC, 4v. So if it is being being driven off an I2C device with the pull-ups going to 3v, it'll never see a 'high', and won't work....
This is the point about choosing pins with TTL input buffers, where Vih is low enough to happily work off the 3v device.

That's a good point.. I work with the lower voltage devices so regularly now...

Ahhh, mixing I2C bus voltages... something I make it a point to avoid.

I have found this wonder: NVT2002 from NXP Semiconductors
http://www.nxp.com/documents/data_sheet/NVT2001_NVT2002.pdf

It is used to translate voltages, and it is specially oriented to I2C communication (take a look at the datasheet, page 6). There is an example of conection using 1.8v & 3.3v (figure 6), but it works too with 3.3v & 5v.
Figure 7 is for devices using 3.3v & 5v, and a controller using from 1v to 1.8v: Isn't it wonderful??

I'm going to use it with a MPU6050 and ATMega168, and then will post the results.

endezya04

Joined: 29 Mar 2013
Posts: 2

MPU6050 and PIC16F877 with CCS C

Posted: Sun Mar 31, 2013 6:42 am

ROBO12 wrote:

Hi. I bought an mpu6050 sensor and I was able to set it up but there is a problem. There are 2 parameters for each axis. For example in x accel axis there are 2 contain, Xout_H[15:8] and Xout_L[7:0]. In accel_XOUT_H I can read data and it is clear on lcd but in XOUT_L the data is not clear and altered.

The register address for _H = 0x3b
The register address for _L = 0x3c

Code for _H:

Code:

i2c_start();
i2c_write(0xd0);
i2c_write(0x3b);
i2c_start():
i2c_write(0xd1);
x=i2c_read(0);
i2c_stop();

code for _L:

Code:

i2c_start();
i2c_write(0xd0);
i2c_write(0x3c);
i2c_start():
i2c_write(0xd1);
y=i2c_read(0);
i2c_stop();

Where is the problem?

hi Guys! I am making a quadcopter with MPU6050 and PIC16F877.But I dont know how can ı connect each other.and I use CCS C as software but I dont do it too.This mpu6050 sensor works with I2C PROTOKOL. can Anyone help me about this issue. Wait your helps.. please..!

ALCION

Joined: 31 May 2007
Posts: 16

Re: MPU6050 and PIC16F877 with CCS C
Posted: Sat Nov 23, 2013 7:18 pm

Hi You could run the MPU-6050? regards

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