PIC18F4539T-E/ML【PDF 23/322 页】IC PIC MCU FLASH 12KX16 44QFN

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2002 Microchip Technology Inc.

Preliminary

DS30485A-page 117

PIC18FXX39

14.3.3

ProMPT API METHODS

There are 27 separate API methods for the ProMPT kernel:

void ProMPT_ClearTick(void)

Resources used: 0 stack levels

Description: This function clears the Tick (62.5 ms) timer flag returned by ProMPT_tick(). This function must be

called by any routine that is used for timing purposes.

void ProMPT_DisableBoostMode(void)

Resources used: 0 stack levels

Description: This function disables the Boost mode logic. This method should be called before changing any of the

Boost mode parameters.

void ProMPT_EnableBoostMode(void)

Resources used: 0 stack levels

Description: This function enables the Boost mode logic. Boost mode is entered when a stopped drive is commanded

to start. The drive will immediately go to Boost Frequency and ramp from Start Modulation to End Modulation over the

time period, Boost Time.

unsigned char ProMPT_GetAccelRate(void)

Resources used: 1 stack level

Range of values: 0 to 255

Description: Returns the current Acceleration Rate in Hz/second.

unsigned char ProMPT_GetBoostEndModulation(void)

Resources used: 1 stack level

Range of values: 0 to 200

Description: Returns the current End Modulation (in %) used in the boost logic.

unsigned char ProMPT_GetBoostFrequency(void)

Resources used: 1 stack level

Range of values: 0 to 127

Description: Returns the current Boost Frequency in Hz.

unsigned char ProMPT_GetBoostStartModulation(void)

Resources used: 1 stack level

Range of values: 0 to BoostEndModulation

Description: Returns the Start Modulation (in %) used in the Boost logic.

Note:

The operation of the Motor Control kernel and its APIs is based on an assumed clock frequency of 20 MHz.

Changing the oscillator frequency will change the timing used in the Motor Control kernel accordingly. To

achieve the best results in motor control applications, a clock frequency of 20 MHz is highly recommended.

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