171 lines
5.3 KiB
C
171 lines
5.3 KiB
C
/*
|
|
* This file is subject to the terms of the GFX License, v1.0. If a copy of
|
|
* the license was not distributed with this file, you can obtain one at:
|
|
*
|
|
* http://chibios-gfx.com/license.html
|
|
*/
|
|
|
|
/**
|
|
* @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"
|
|
|
|
#if defined(GINPUT_MOUSE_USE_CUSTOM_BOARD) && GINPUT_MOUSE_USE_CUSTOM_BOARD
|
|
#include "ginput_lld_mouse_board.h"
|
|
#elif defined(BOARD_EMBEST_DMSTF4BB)
|
|
#include "ginput_lld_mouse_board_embest_dmstf4bb.h"
|
|
#else
|
|
#include "ginput_lld_mouse_board_example.h"
|
|
#endif
|
|
|
|
#ifndef STMP811_NO_GPIO_IRQPIN
|
|
#define STMP811_NO_GPIO_IRQPIN FALSE
|
|
#endif
|
|
#ifndef STMP811_SLOW_CPU
|
|
#define STMP811_SLOW_CPU FALSE
|
|
#endif
|
|
|
|
static coord_t x, y, z;
|
|
static uint8_t touched;
|
|
|
|
/* 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
|
|
chThdSleepMilliseconds(10);
|
|
|
|
write_reg(STMPE811_REG_SYS_CTRL2, 1, 0x0C); // Temperature sensor clock off, GPIO clock off, touch clock on, ADC clock on
|
|
#if STMP811_NO_GPIO_IRQPIN
|
|
write_reg(STMPE811_REG_INT_EN, 1, 0x00); // Interrupt on INT pin when touch is detected
|
|
#else
|
|
write_reg(STMPE811_REG_INT_EN, 1, 0x01); // Interrupt on INT pin when touch is detected
|
|
#endif
|
|
write_reg(STMPE811_REG_ADC_CTRL1, 1, 0x48); // ADC conversion time = 80 clock ticks, 12-bit ADC, internal 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
|
|
write_reg(STMPE811_REG_TSC_CFG, 1, 0x9A); // Averaging 4, touch detect delay 500 us, panel driver settling time 500 us
|
|
write_reg(STMPE811_REG_FIFO_TH, 1, 0x40); // FIFO threshold = 64
|
|
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, 0x00); // X&Y&Z
|
|
write_reg(STMPE811_REG_TSC_CTRL, 1, 0x01); // X&Y&Z, TSC enable
|
|
write_reg(STMPE811_REG_INT_STA, 1, 0xFF); // Clear all interrupts
|
|
#if !STMP811_NO_GPIO_IRQPIN
|
|
touched = (uint8_t)read_reg(STMPE811_REG_TSC_CTRL, 1) & 0x80;
|
|
#endif
|
|
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)
|
|
{
|
|
bool_t clearfifo; // Do we need to clear the FIFO
|
|
|
|
#if STMP811_NO_GPIO_IRQPIN
|
|
// Poll to get the touched status
|
|
uint8_t last_touched;
|
|
|
|
last_touched = touched;
|
|
touched = (uint8_t)read_reg(STMPE811_REG_TSC_CTRL, 1) & 0x80;
|
|
clearfifo = (touched != last_touched);
|
|
#else
|
|
// Check if the touch controller IRQ pin has gone off
|
|
clearfifo = false;
|
|
if(getpin_irq()) { // please rename this to getpin_irq
|
|
write_reg(STMPE811_REG_INT_STA, 1, 0xFF); // clear all interrupts
|
|
touched = (uint8_t)read_reg(STMPE811_REG_TSC_CTRL, 1) & 0x80; // set the new touched status
|
|
clearfifo = true; // only take the last FIFO reading
|
|
}
|
|
#endif
|
|
|
|
// If not touched, return the previous results
|
|
if (!touched) {
|
|
pt->x = x;
|
|
pt->y = y;
|
|
pt->z = 0;
|
|
pt->buttons = 0;
|
|
return;
|
|
}
|
|
|
|
#if !STMP811_SLOW_CPU
|
|
if (!clearfifo && (read_reg(STMPE811_REG_FIFO_STA, 1) & 0xD0))
|
|
#endif
|
|
clearfifo = true;
|
|
|
|
do {
|
|
/* Get the X, Y, Z values */
|
|
/* This could be done in a single 4 byte read to STMPE811_REG_TSC_DATA_XYZ (incr or non-incr) */
|
|
x = (coord_t)read_reg(STMPE811_REG_TSC_DATA_X, 2);
|
|
y = (coord_t)read_reg(STMPE811_REG_TSC_DATA_Y, 2);
|
|
z = (coord_t)read_reg(STMPE811_REG_TSC_DATA_Z, 1);
|
|
} while(clearfifo && !(read_reg(STMPE811_REG_FIFO_STA, 1) & 0x20));
|
|
|
|
// Rescale X,Y,Z - X & Y don't need scaling when you are using calibration!
|
|
#if !GINPUT_MOUSE_NEED_CALIBRATION
|
|
x = gdispGetWidth() - x / (4096/gdispGetWidth());
|
|
y = y / (4096/gdispGetHeight());
|
|
#endif
|
|
z = (((z&0xFF) * 100)>>8) + 1;
|
|
|
|
// Return the results. ADC gives values from 0 to 2^12 (4096)
|
|
pt->x = x;
|
|
pt->y = y;
|
|
pt->z = z;
|
|
pt->buttons = GINPUT_TOUCH_PRESSED;
|
|
|
|
/* Force another read if we have more results */
|
|
if (!clearfifo && !(read_reg(STMPE811_REG_FIFO_STA, 1) & 0x20))
|
|
ginputMouseWakeup();
|
|
|
|
}
|
|
|
|
#endif /* GFX_USE_GINPUT && GINPUT_NEED_MOUSE */
|
|
/** @} */
|
|
|