128 lines
4.3 KiB
C
128 lines
4.3 KiB
C
/*
|
|
ChibiOS/GFX - Copyright (C) 2012, 2013
|
|
Joel Bodenmann aka Tectu <joel@unormal.org>
|
|
|
|
This file is part of ChibiOS/GFX.
|
|
|
|
ChibiOS/GFX is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
ChibiOS/GFX is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/**
|
|
* @file drivers/ginput/touch/STMPE811/ginput_lld_mouse.c
|
|
* @brief GINPUT Touch low level driver source for the STMPE811.
|
|
*
|
|
* @defgroup Mouse Mouse
|
|
* @ingroup GINPUT
|
|
* @{
|
|
*/
|
|
|
|
#include "ch.h"
|
|
#include "hal.h"
|
|
#include "gfx.h"
|
|
|
|
#include "stmpe811.h"
|
|
|
|
#if (GFX_USE_GINPUT && GINPUT_NEED_MOUSE) /*|| defined(__DOXYGEN__)*/
|
|
|
|
#include "ginput/lld/mouse.h"
|
|
|
|
#include "ginput_lld_mouse_board_embest_dmstf4bb.h"
|
|
|
|
static coord_t lastx, lasty, lastz;
|
|
|
|
/* set the active window of the stmpe811. bl is bottom left, tr is top right */
|
|
static void setActiveWindow(uint16_t bl_x, uint16_t bl_y, uint16_t tr_x, uint16_t tr_y) {
|
|
write_reg(STMPE811_REG_WDW_TR_X, 2, tr_x);
|
|
write_reg(STMPE811_REG_WDW_TR_Y, 2, tr_y);
|
|
write_reg(STMPE811_REG_WDW_BL_X, 2, bl_x);
|
|
write_reg(STMPE811_REG_WDW_BL_Y, 2, bl_y);
|
|
}
|
|
|
|
/**
|
|
* @brief Initialise the mouse/touch.
|
|
*
|
|
* @notapi
|
|
*/
|
|
void ginput_lld_mouse_init(void) {
|
|
init_board();
|
|
|
|
write_reg(STMPE811_REG_SYS_CTRL1, 1, 0x02); // Software chip reset
|
|
write_reg(STMPE811_REG_SYS_CTRL2, 1, 0x0C); // Temp. sensor clock off, GPIO clock off, touch clock on, ADC clock on
|
|
write_reg(STMPE811_REG_INT_EN, 1, 0x03); // Interrupt on INT pin when FIFO is equal or above threshold value OR touch is detected
|
|
write_reg(STMPE811_REG_ADC_CTRL1, 1, 0x48); // ADC conversion time = 80 clock ticks, 12-bit ADC, internaal voltage refernce
|
|
|
|
chThdSleepMilliseconds(2);
|
|
|
|
write_reg(STMPE811_REG_ADC_CTRL2, 1, 0x01); // ADC speed 3.25MHz
|
|
write_reg(STMPE811_REG_GPIO_AF, 1, 0x00); // GPIO alternate function - OFF
|
|
// @TODO: decide which value should STMPE811_REG_TSC_CFG have - either 0x9A or from comment;)
|
|
write_reg(STMPE811_REG_TSC_CFG, 1, 0x9A); // Averaging 4, Touch detect delay 1ms, Panel driver settling time 1ms
|
|
write_reg(STMPE811_REG_FIFO_TH, 1, 0x01); // FIFO threshold =1
|
|
write_reg(STMPE811_REG_FIFO_STA, 1, 0x01); // FIFO reset enable
|
|
write_reg(STMPE811_REG_FIFO_STA, 1, 0x00); // FIFO reset disable
|
|
write_reg(STMPE811_REG_TSC_FRACT_XYZ, 1, 0x07); // Z axis data format
|
|
write_reg(STMPE811_REG_TSC_I_DRIVE, 1, 0x01); // 50mA touchscreen line current
|
|
write_reg(STMPE811_REG_TSC_CTRL, 1, 0x03); // X&Y only, TSC enable
|
|
write_reg(STMPE811_REG_INT_STA, 1, 0xFF); // Clear all interrupts
|
|
write_reg(STMPE811_REG_INT_CTRL, 1, 0x01); // Level interrupt, enable intrrupts
|
|
}
|
|
|
|
/**
|
|
* @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 buf;
|
|
|
|
// if not touched, return the previous results
|
|
if(!getpin_pressed()) {
|
|
pt->x = lastx;
|
|
pt->y = lasty;
|
|
pt->z = 0;
|
|
pt->buttons = 0;
|
|
return;
|
|
}
|
|
|
|
/* Get the X value */
|
|
buf = read_reg(STMPE811_REG_TSC_DATA_X, 2);
|
|
lastx = (coord_t)(buf);
|
|
|
|
/* Get the Y value */
|
|
buf = read_reg(STMPE811_REG_TSC_DATA_Y, 2);
|
|
lasty = (coord_t)(buf);
|
|
|
|
/* Get the Z value */
|
|
buf = read_reg(STMPE811_REG_TSC_DATA_Z, 1);
|
|
lastz = (buf & 0x00FF);
|
|
|
|
// Return the results
|
|
pt->x = lastx;
|
|
pt->y = lasty;
|
|
pt->z = 100;
|
|
pt->buttons = GINPUT_TOUCH_PRESSED;
|
|
}
|
|
|
|
#endif /* GFX_USE_GINPUT && GINPUT_NEED_MOUSE */
|
|
/** @} */
|
|
|