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ST9 USER GUIDE

4.8.2.2 MFT File

4.8.2.2.1 MFT Files without DMA

The MFT function file is <mft\appli1\mft.c> and contains 6 functions that are initialized for gen-

erating two PWM signals using the two output pins of the MFT0.

Compare0 and Compare1 events are managed by interrupts.

Input A is used as a gate: as long as a +5V level is applied on it, the counter stops down-

counting and the PWM signals are thus not generated.

The following ports are used for this:

– T0OUTB

– T0OUTA

– T0INA

Table 5.

APPLI1\MFT.C Functions

4.8.2.2.2 MFT files with DMA

The MFT function file is <mft\appli2\mft.c> and contains 7 functions that are initialized for gen-

erating a PWM signal using the MFT and a DMA channel.

void INIT_ADC_IT(void);

The pointer to the array of two IT vectors dedicated to the AD is initialized.

The priority of these interrupts is initialized. This routine initializes both end

of count and analog watchdog. Don't forget to initialize your start-up file

correctly.

void Enable_ADC_IT(void);

This routine enables interrupts: End of Conversion or/and Analog Watch-

dog.

void

INTADC_AnaWd(void);

Interrupt subroutine dedicated to Analog Watchdog.

void

INTADC_EndConv(void);

Interrupt subroutine which occurs after an end of conversion event.

Function

Description and Comments

void INIT_MFT(void);

MFT initialization.

It initializes the value loaded into the prescaler and into the counter.

void START_MFT(void);

Start the MFT.

void STOP_MFT (void);

Stop the MFT.

void INIT_MFT_IT(void);

This function configures the IT for the MFT.

void Enable_MFTCM_IT(void);

Enables Compare0 and Compare1 IT.

void INTMFT_Compare(void);

Interrupt subroutine which occurs after:

- Compare 0

- Compare 1

Only one IT vector.

Function

Description and Comments

ST9 Datasheet(PDF) 104 Page - STMicroelectronics

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