poten.h File Reference

Detailed Description

MCP42010 digital potentiometer driver.

Date

Mar 16, 2013

Author

Andrey Belomutskiy, (c) 2012-2020

Definition in file poten.h.

Data Structures
struct	Mcp42010Driver

Functions
void	initPotentiometers ()
void	setPotResistance (Mcp42010Driver *driver, int channel, int resistance)

Function Documentation

initPotentiometers()

void initPotentiometers

(

)

Definition at line 90 of file poten.cpp.

                          {
#if EFI_POTENTIOMETER
    if (engineConfiguration->digitalPotentiometerSpiDevice == SPI_NONE) {
        efiPrintf("digiPot spi disabled");
        return;
    }
    // todo: we have centralized SPI management see other usages of 'turnOnSpi'
    //turnOnSpi(engineConfiguration->digitalPotentiometerSpiDevice);
 
    for (int i = 0; i < DIGIPOT_COUNT; i++) {
        brain_pin_e csPin = engineConfiguration->digitalPotentiometerChipSelect[i];
        if (!isBrainPinValid(csPin)) {
            continue;
                }
 
        SPIDriver *driver = getSpiDevice(engineConfiguration->digitalPotentiometerSpiDevice);
        if (driver == NULL) {
            // error already reported
            return;
        }
 
        initPotentiometer(&potConfig[i], driver, csPin);
    }
 
    addConsoleActionII("pot", setPotResistanceCommand);
 
    addConsoleActionI("potd1", setPotValue1);
 
    setPotResistance(&potConfig[0], 0, 3000);
    setPotResistance(&potConfig[0], 1, 7000);
#endif
}

Referenced by initEngineEmulator().

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setPotResistance()

void setPotResistance	(	Mcp42010Driver *	driver,
		int	channel,
		int	resistance
	)

Definition at line 73 of file poten.cpp.

                                                                           {
    int value = getPotStep(resistance);
 
    efiPrintf("Sending to potentiometer%d: %d for R=%d", channel, value, resistance);
    sendToPot(driver, channel, value);
}

Referenced by initPotentiometers(), and setPotResistanceCommand().

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