ST9 datasheet(106/146 Pages) STMICROELECTRONICS

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ST9 USER GUIDE

Table 7.

APPLI3\MFT.C Functions

4.8.2.3 RCCU File

The RCCU file is <rrcu\rccu.c> and contains 5 functions for controlling the RCCU in your ap-

plication. The header file has no uninitialized constants since the functions are dedicated.

Table 8.

RCCU.C Functions

4.8.2.4 SCI File

4.8.2.4.1 Simple SCI Files (SCI-M)

The SCI function file is <sci\appli1\sci.c> and contains 4 functions that are initialized for

sending ten bytes from the ST9 to the serial link (RS232).

It uses End of Transmission interrupts.

Port used:

– Tx (S0OUT)

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 in the swap mode.

void STOP_MFT (void);

Stop the MFT.

void

INIT_MFT_ITDMA(void);

This function configures the IT and the DMA for the MFT.

void

Enable_MFTCP0_DMA(un-

signed int * CompBuffer, un-

signed int Count)

Enable Compare0 DMA.

void

INTMFT_CompEOB(void);

Interrupt subroutine which occurs after a compare0 DMA end of block.

The DMA is swapped.

FUNCTION

DESCRIPTION AND COMMENTS

void INIT_PLL(void);

Initialize the PLL, Mul. by 6, div. by 1.

Wait 500µs to stabilize the PLL.

void INIT_clock2(void);

INTCLK = CLOCK2 = EXT OSCILLATOR / 2.

void INIT_clock2_16(void);

INTCLK = CLOCK2/16 = EXT OSCILLATOR / 32.

void

SWITCH_TO_EXTCLK(void

);

Stop the Xtal oscillator and select the external clock (if present).

void BACK_TO_XTAL(void); Restart the Xtal oscillator and select it as the clock source.

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