touch.c File Reference
Touch panel driver for DK3650, DK3750 and DK3850 Development Kits.
License
Copyright 2018 Silicon Laboratories Inc. www.silabs.com
SPDX-License-Identifier: Zlib
The licensor of this software is Silicon Laboratories Inc.
This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.
Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:
- The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
- Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
- This notice may not be removed or altered from any source distribution.
Definition in file touch.c
.
#include <stdlib.h>
#include <string.h>
#include "em_device.h"
#include "em_adc.h
"
#include "em_gpio.h
"
#include "em_cmu.h
"
#include "touch.h
"
#include "calibrate.h"
#include "bsp.h
"
#include "i2cspm.h
"
#include "eeprom.h
"
Macros | |
#define | ADC_X adcSingleInpCh1 |
#define | ADC_Y adcSingleInpCh4 |
#define | TOUCH_X1_PIN 5 |
#define | TOUCH_X1_PORT gpioPortD |
#define | TOUCH_X2_PIN 4 |
#define | TOUCH_X2_PORT gpioPortD |
#define | TOUCH_Y1_PIN 3 |
#define | TOUCH_Y1_PORT gpioPortD |
#define | TOUCH_Y2_PIN 1 |
#define | TOUCH_Y2_PORT gpioPortD |
Enumerations | |
enum | TOUCH_State_TypeDef { TOUCH_INIT, TOUCH_CHECK_PRESS, TOUCH_MEASURE_X, TOUCH_MEASURE_Y } |
Functions | |
void | ADC0_IRQHandler (void) |
Interrupt handler is executed with frequency ~28Hz when panel is not pressed and with frequency ~140Hz when panel is pressed - this will give ~50 readings per second. | |
int | TOUCH_CalibrationTable (POINT *displayPtr, POINT *screenPtr) |
Set calibration table. | |
void | TOUCH_CallUpcall (void) |
Function that calls registered upcall. | |
TOUCH_Pos_TypeDef * | TOUCH_GetPos (void) |
Returns current touch position and state. | |
void | TOUCH_Init (TOUCH_Config_TypeDef *config) |
Initialize touch panel driver. | |
int | TOUCH_IsBusy (void) |
Check status of the touch panel. | |
void | TOUCH_RecalculatePosition (volatile TOUCH_Pos_TypeDef *pos) |
Convert ADC readings into XY position. | |
void | TOUCH_RegisterUpcall (TOUCH_Upcall_TypeDef *new_upcall) |
Register upcall which will be call every position or state change. | |
int | TOUCH_StateChanged (void) |
Check if cursor state changed (down or move) | |
Variables | |
MATRIX | calibrationMatrix = { 103800, 2048, -8184704, -384, 102144, -16424640, 287650 } |