PM0014 datasheet(12/46 Pages) STMICROELECTRONICS

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Developing new functions

PM0014

12/46

Developing new functions

This library has been done for filtering. Other general purpose functions or application

segment specific functions can be developed.

4.1

Examples of functions for data acquisition

4.1.1

Detection of the minimum or maximum in a collection of samples

ST10 instructions (CoMin and CoMax) allow to detect the maximum or the minimum

between the accumulator and an external operand. Using a DSP loop with pointer auto-

modification, the minimum or the maximum of a parameter in a collection of samples can be

detected at a rate of one instruction cycle per sample for 16-bit operands and for 32-bit

operands.

4.1.2

Computing the sum of a collection of samples

Using a DSP loop with ST10 instruction CoAdd allows to compute the sum of a collection of

samples at a rate of one instruction cycle per sample for both 16-bit and 32-bit operands.

4.1.3

Search for an element within a collection of samples

Using a DSP loop with ST10 instruction CoCMP allow to compare an external operand with

the accumulator at a rate of one instruction cycle per sample for both 16-bit and 32-bit

operands.

4.2

Developing your own DSP functions

Please refer to the application note AN1442 - Signal Processing with ST10-DSP for more

information.

PM0014 データシート(PDF) 12 Page - STMicroelectronics