F407 and lis3dsh

Konstantin Maslennikov · ‎2018-02-23

Posted on February 23, 2018 at 15:01

I'm try use only registers for lis3dsh.

- my code. This code sometimes is worked, but sometimes it stopped. Can any help my?

#cmsis #registers #lis3dsh

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Andrew Neil · ‎2018-02-23

Posted on February 23, 2018 at 15:17

So what debugging have you done?

Konstantin Maslennikov · ‎2018-02-23

Posted on February 23, 2018 at 16:08

Anytime funtion

uint8_t SPI1SendData(uint8_t data)

{

while (!(SPI1->SR & SPI_SR_TXE)){};

SPI1->DR = data;

while (!(SPI1->SR & SPI_SR_RXNE)){};

data = SPI1->DR;

return data;

}

return 0xFF.

:(

Why, I don,t know...

Bogdan Golab · ‎2018-02-23

Posted on February 23, 2018 at 16:12

Looks like CS (chip select) is not enabled or sensor internal register address embedded in data sent to the sensor is wrong

Andrew Neil · ‎2018-02-23

Posted on February 23, 2018 at 16:58

Have you actually looked at the SPI lines on an oscilloscope to see what's happening ?

Konstantin Maslennikov · ‎2018-02-23

Posted on February 23, 2018 at 17:01

I'm have not oscilloscope..

:(

Andrew Neil · ‎2018-02-23

Posted on February 23, 2018 at 19:22

Similar question just posted:

Andrew Neil · ‎2018-02-23

Posted on February 23, 2018 at 19:21

You're pretty much stuck when it comes to hardware debugging, then.

Bogdan Golab · ‎2018-02-23

Posted on February 23, 2018 at 20:13

Check wiring. CS needs to be set to 0 when want to read / write through SPI.

Konstantin Maslennikov · ‎2018-02-23

Posted on February 23, 2018 at 20:20

It's stm32f4-disco..