128 lines
3.0 KiB
C
128 lines
3.0 KiB
C
/*
|
|
* This file is subject to the terms of the GFX License. If a copy of
|
|
* the license was not distributed with this file, you can obtain one at:
|
|
*
|
|
* http://ugfx.org/license.html
|
|
*/
|
|
|
|
/**
|
|
* @file drivers/ginput/touch/MCU/ginput_lld_mouse.c
|
|
* @brief GINPUT Touch low level driver source for the MCU.
|
|
*
|
|
* @defgroup Mouse Mouse
|
|
* @ingroup GINPUT
|
|
*
|
|
* @{
|
|
*/
|
|
|
|
#include "gfx.h"
|
|
|
|
#if (GFX_USE_GINPUT && GINPUT_NEED_MOUSE) /*|| defined(__DOXYGEN__)*/
|
|
|
|
#include "ginput/lld/mouse.h"
|
|
|
|
#if defined(GINPUT_MOUSE_USE_CUSTOM_BOARD) && GINPUT_MOUSE_USE_CUSTOM_BOARD
|
|
#include "ginput_lld_mouse_board.h"
|
|
#elif defined(BOARD_OLIMEX_STM32_LCD)
|
|
#include "ginput_lld_mouse_board_olimex_stm32_lcd.h"
|
|
#elif defined(BOARD_OLIMEX_PIC32MX_LCD)
|
|
#include "ginput_lld_mouse_board_olimex_pic32mx_lcd.h"
|
|
#else
|
|
#include "ginput_lld_mouse_board.h"
|
|
#endif
|
|
|
|
static uint16_t sampleBuf[7];
|
|
static coord_t lastx, lasty;
|
|
|
|
/**
|
|
* @brief 7-point median filtering code for touchscreen samples
|
|
*
|
|
* @note This is an internally used routine only.
|
|
*
|
|
* @notapi
|
|
*/
|
|
static void filter(void) {
|
|
uint16_t temp;
|
|
int i,j;
|
|
|
|
for(i = 0; i < 4; i++) {
|
|
for(j = i; j < 7; j++) {
|
|
if(sampleBuf[i] > sampleBuf[j]) {
|
|
/* Swap the values */
|
|
temp = sampleBuf[i];
|
|
sampleBuf[i] = sampleBuf[j];
|
|
sampleBuf[j] = temp;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Initialise the mouse/touch.
|
|
*
|
|
* @notapi
|
|
*/
|
|
void ginput_lld_mouse_init(void) {
|
|
init_board();
|
|
}
|
|
|
|
/**
|
|
* @brief Read the mouse/touch position.
|
|
*
|
|
* @param[in] pt A pointer to the structure to fill
|
|
*
|
|
* @note For drivers that don't support returning a position
|
|
* when the touch is up (most touch devices), it should
|
|
* return the previous position with the new Z value.
|
|
* The z value is the pressure for those touch devices
|
|
* that support it (-100 to 100 where > 0 is touched)
|
|
* or, 0 or 100 for those drivers that don't.
|
|
*
|
|
* @notapi
|
|
*/
|
|
void ginput_lld_mouse_get_reading(MouseReading *pt) {
|
|
uint16_t i;
|
|
|
|
// If touch-off return the previous results
|
|
if (!getpin_pressed()) {
|
|
pt->x = lastx;
|
|
pt->y = lasty;
|
|
pt->z = 0;
|
|
pt->buttons = 0;
|
|
return;
|
|
}
|
|
|
|
// Read the port to get the touch settings
|
|
aquire_bus();
|
|
|
|
/* Get the X value
|
|
* Discard the first conversion - very noisy and keep the ADC on hereafter
|
|
* till we are done with the sampling.
|
|
* Once we have the readings, find the medium using our filter function
|
|
*/
|
|
read_x_value();
|
|
for(i = 0; i < 7; i++)
|
|
sampleBuf[i] = read_x_value();
|
|
filter();
|
|
lastx = (coord_t)sampleBuf[3];
|
|
|
|
/* Get the Y value using the same process as above */
|
|
read_y_value();
|
|
for(i = 0; i < 7; i++)
|
|
sampleBuf[i] = read_y_value();
|
|
filter();
|
|
lasty = (coord_t)sampleBuf[3];
|
|
|
|
// Release the bus
|
|
release_bus();
|
|
|
|
// Return the results
|
|
pt->x = lastx;
|
|
pt->y = lasty;
|
|
pt->z = 100;
|
|
pt->buttons = GINPUT_TOUCH_PRESSED;
|
|
}
|
|
|
|
#endif /* GFX_USE_GINPUT && GINPUT_NEED_MOUSE */
|
|
/** @} */
|