I2C on LPC1769 with adxl345

[lpcware]

Content originally posted in LPCWare by Harukana on Fri Apr 12 23:45:36 MST 2013
I'm currently working on a project dealing with adxl345 on lpc1769 and i'm using LPCXpresso to write the program. However i did not manage to read the data from the adxl345 itself and the result keeps returning just the decimal value of the register address. Is it because the i2cread() function is not working or it is because of some initialization problem? Anybody could offer some help T.T ? thank you in prior . and here attached is my code

[lpcware]

Content originally posted in LPCWare by serge on Tue Apr 16 00:09:51 MST 2013
Did you shift the 7-bit device address to the left and added the read/write bit? because otherwise your ADXL345 will not respond.
I scanned quickly through your code and found a few things

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Quote:

#define DEVICE 0x00 // Device address as specified in data sheet

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where the device address should be 0x53 and a little bit further in your code:

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Quote:

/*Send slave address first
datval[0] = 0xE5;
I2CWrite([COLOR=red]DEVICE[/COLOR], datval, 1);

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Better take a good look at your code and when you modify samples read them over and over.

Or i misinterpreted something...

[lpcware]

Content originally posted in LPCWare by alpha ads on Mon Apr 15 22:33:23 MST 2013
Waow


Bus Shelter

[lpcware]

Content originally posted in LPCWare by daniel.widyanto on Mon Apr 15 21:27:51 MST 2013
Hook your oscilloscope and see whether the signal match the adxl345 spec ?