[Floating and fixed point math capabilities]

Hi All,

 

I'm new to the MSP430 and am looking at using some for a device I am developing. I will be using a handful of MSP430's on modular boards to perform various functions.

 

Some of the modular boards will be required to perform floating/fixed point multiplication and division.

I am trying to determine if I could get away with using an MSP device without hardware multiply to achieve these goals to keep the cost down.

 

Here are rough details of 2 of these boards (All FP and int are 16bits)

The calculations are in no particular order.

 

*Board 1, at 40 Hz, i.e. every 25ms

Receive 2x16bits from SPI sensor

Output 3x16bits serial onto external BUS (format to be defined)

Perform 2x FP/INT divide

Perform 1x FP/INT Multiply

Perform 2x FP/INT subtract

Perform 2x FP/FP divide

Perform 2x FP/FP Multiply

Perform about 6-8 FP =,> or < comparisons

 

*Board 2, at 400Hz, i.e. every 2.5ms

Receive 16 bits from SPI sensor

Output 2x16bits serial onto external BUS (format to be defined)

Perform 2x FP/INT divide

Perform 1x FP/INT Multiply

Perform 2x FP/INT subtract

Perform 2x FP/FP divide

Perform 4x FP/FP subtract

Perform about 8-10 FP =,> or

 

I think that's it. Do you think an MSP device at 16Mhz could handle this without hardware multiply?