several sensors all with SPI connection must be read all at once

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ebtehal younis

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i'm trying to build my inertial measurement unit (IMU) where i'm using several sensors all must be read at the same time....but all of these sensor use SPI interface.....what i need to ask you first...is there any microcontroller able to read up to 7 sensors all at one in SPI mode?! second....if not..how can i do it using any extra device?

any help will be great
 

Clearly they can't all be "read at once" unless you have multiple SPI interfaces (either peripheral or software implementation) on a microcontroller. I don't know of
any such device, it doesn't exist.
They can be read sequentially - most devices/sensors with SPI have a *CE pin (chip enable). Connect each *CE pin to the microcontroller to select the device to control.
 

If your sensors are available as I2C as well as SPI some PIC32s have 4 SPI and 5 I2C interfaces - also you could use DMA
Also you need to specify what is "read at the same time", e.g. all within a nanosecond or a microsecond or a millsecond ?
 

horace1 said:
If your sensors are available as I2C as well as SPI some PIC32s have 4 SPI and 5 I2C interfaces - also you could use DMA
Also you need to specify what is "read at the same time", e.g. all within a nanosecond or a microsecond or a millsecond ?
Click to expand...


which PIC microcontroller exactly you are talking about? some of the sensors can be connected using I2C, o i may use this microcontroller
 


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