caplesense.c File Reference

Detailed Description

Capacitive sense driver.

Version

5.1.1

License

Copyright 2015 Silicon Labs, Inc. http://www.silabs.com

This file is licensed under the Silabs License Agreement. See the file "Silabs_License_Agreement.txt" for details. Before using this software for any purpose, you must agree to the terms of that agreement.

Definition in file caplesense.c.

#include "em_device.h"
#include "caplesense.h"
#include "em_emu.h"
#include "em_acmp.h"
#include "em_assert.h"
#include "em_cmu.h"
#include "em_gpio.h"
#include "em_core.h"
#include "em_lesense.h"
#include "caplesenseconfig.h"

Go to the source code of this file.

Functions
uint32_t	CAPLESENSE_getNormalizedVal (uint8_t channel)
	Get the current normalized channelValue for a channel. More...
uint8_t	CAPLESENSE_getSegmentChannel (uint8_t capSegment)
	Get the channelValue for a sensor segment. More...
int32_t	CAPLESENSE_getSliderPosition (void)
	Get the position of the slider. More...
uint32_t	CAPLESENSE_getVal (uint8_t channel)
	Get the current channelValue for a channel. More...
void	CAPLESENSE_Init (bool sleep)
	Initializes the capacative sense system without LESENSE. More...
void	CAPLESENSE_setupACMP (void)
	Setup the ACMP.
void	CAPLESENSE_setupCallbacks (void(*scanCb)(void), void(*chCb)(void))
	LESENSE callback setup. More...
void	CAPLESENSE_setupCMU (void)
	Setup the CMU. More...
void	CAPLESENSE_setupGPIO (void)
	Setup the GPIO.
void	CAPLESENSE_setupLESENSE (bool sleep)
	Setup the LESENSE for capavitive sensing. More...
void	CAPLESENSE_Sleep (void)
	Send the capacative sense system to sleep mode.
void	LESENSE_IRQHandler (void)
	LESENSE interrupt handler.

Variables
static volatile uint32_t	channelMaxValues [LESENSE_CHANNELS]
	This stores the maximum values seen by a channel. More...
static const bool	channelsInUse [LESENSE_CHANNELS] = LESENSE_CAPSENSE_CH_IN_USE
	A bit vector which represents the channels to iterate through. More...
static volatile uint32_t	channelValues [LESENSE_CHANNELS]
	This vector stores the latest read values from LESENSE. More...
static volatile uint8_t	currentChannel
static void(*	lesenseChCb )(void)
static void(*	lesenseScanCb )(void)

Function Documentation

void CAPLESENSE_setupCMU

(

void

)

Setup the CMU.

Prototypes

Definition at line 88 of file caplesense.c.

References CMU_ClockDivSet(), CMU_ClockEnable(), CMU_ClockSelectSet(), cmuClkDiv_1, cmuClock_ACMP0, cmuClock_ACMP1, cmuClock_GPIO, cmuClock_HF, cmuClock_HFPER, cmuClock_LFA, cmuClock_LFB, cmuSelect_Disabled, cmuSelect_HFRCO, cmuSelect_LFRCO, and SystemCoreClockUpdate().

Referenced by CAPLESENSE_Init().

Variable Documentation

volatile uint32_t channelMaxValues[LESENSE_CHANNELS]

static

Initial value:

=
{

  1, 1, 1, 1, 1, 1, 1, 1,

  1, 1, 1, 1, 1, 1, 1, 1
}

This stores the maximum values seen by a channel.

Parameters

LESENSE_CHANNELS

Vector of channels.

Definition at line 50 of file caplesense.c.

Referenced by CAPLESENSE_getNormalizedVal(), CAPLESENSE_getSliderPosition(), CAPSENSE_getNormalizedVal(), CAPSENSE_getPressed(), CAPSENSE_getSliderPosition(), LESENSE_IRQHandler(), and TIMER0_IRQHandler().

const bool channelsInUse[LESENSE_CHANNELS] = LESENSE_CAPSENSE_CH_IN_USE

static

A bit vector which represents the channels to iterate through.

Parameters

LESENSE_CHANNELS

Vector of channels.

Definition at line 62 of file caplesense.c.

Referenced by CAPLESENSE_setupLESENSE(), CAPSENSE_Sense(), and LESENSE_IRQHandler().

volatile uint32_t channelValues[LESENSE_CHANNELS]

static

Initial value:

=
{

  0, 0, 0, 0, 0, 0, 0, 0,

  0, 0, 0, 0, 0, 0, 0, 0
}

This vector stores the latest read values from LESENSE.

Parameters

LESENSE_CHANNELS

Vector of channels.

Definition at line 37 of file caplesense.c.

Referenced by CAPLESENSE_getNormalizedVal(), CAPLESENSE_getSliderPosition(), CAPLESENSE_getVal(), CAPSENSE_getNormalizedVal(), CAPSENSE_getPressed(), CAPSENSE_getSliderPosition(), CAPSENSE_getVal(), LESENSE_IRQHandler(), and TIMER0_IRQHandler().

volatile uint8_t currentChannel

static

The current channel we are sensing

Definition at line 81 of file caplesense.c.

Referenced by CAPSENSE_Sense(), LESENSE_IRQHandler(), and TIMER0_IRQHandler().

void(* lesenseChCb) (void)

static

Callback function for LESENSE interrupts.

Definition at line 78 of file caplesense.c.

Referenced by CAPLESENSE_setupCallbacks(), and LESENSE_IRQHandler().

void(* lesenseScanCb) (void)

static

Local variablesCallback function for LESENSE interrupts.

Definition at line 76 of file caplesense.c.

Referenced by CAPLESENSE_setupCallbacks(), and LESENSE_IRQHandler().