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/*
* 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
*/
#include "gfx.h"
#if GFX_USE_GINPUT && GINPUT_NEED_MOUSE
#define GMOUSE_DRIVER_VMT GMOUSEVMT_STMPE811
#include "src/ginput/driver_mouse.h"
#define GMOUSE_STMPE811_FLG_TOUCHED (GMOUSE_FLG_DRIVER_FIRST<<0)
// Hardware definitions
#include "drivers/ginput/touch/STMPE811/stmpe811.h"
// Get the hardware interface
#include "gmouse_lld_STMPE811_board.h"
static bool_t MouseInit(GMouse* m, unsigned driverinstance) {
if (!init_board(m, driverinstance))
return FALSE;
aquire_bus(m);
write_reg(m, STMPE811_REG_SYS_CTRL1, 0x02); // Software chip reset
gfxSleepMilliseconds(10);
write_reg(m, STMPE811_REG_SYS_CTRL2, 0x0C); // Temperature sensor clock off, GPIO clock off, touch clock on, ADC clock on
#if GMOUSE_STMPE811_GPIO_IRQPIN
write_reg(m, STMPE811_REG_INT_EN, 0x01); // Interrupt on INT pin when touch is detected
#else
write_reg(m, STMPE811_REG_INT_EN, 0x00); // Don't Interrupt on INT pin when touch is detected
#endif
write_reg(m, STMPE811_REG_ADC_CTRL1, 0x48); // ADC conversion time = 80 clock ticks, 12-bit ADC, internal voltage refernce
gfxSleepMilliseconds(2);
write_reg(m, STMPE811_REG_ADC_CTRL2, 0x01); // ADC speed 3.25MHz
write_reg(m, STMPE811_REG_GPIO_AF, 0x00); // GPIO alternate function - OFF
write_reg(m, STMPE811_REG_TSC_CFG, 0x9A); // Averaging 4, touch detect delay 500 us, panel driver settling time 500 us
write_reg(m, STMPE811_REG_FIFO_TH, 0x40); // FIFO threshold = 64
write_reg(m, STMPE811_REG_FIFO_STA, 0x01); // FIFO reset enable
write_reg(m, STMPE811_REG_FIFO_STA, 0x00); // FIFO reset disable
write_reg(m, STMPE811_REG_TSC_FRACT_XYZ, 0x07); // Z axis data format
write_reg(m, STMPE811_REG_TSC_I_DRIVE, 0x01); // 50mA touchscreen line current
write_reg(m, STMPE811_REG_TSC_CTRL, 0x00); // X&Y&Z
write_reg(m, STMPE811_REG_TSC_CTRL, 0x01); // X&Y&Z, TSC enable
write_reg(m, STMPE811_REG_INT_STA, 0xFF); // Clear all interrupts
#if GMOUSE_STMPE811_GPIO_IRQPIN
if (read_byte(m, STMPE811_REG_TSC_CTRL) & 0x80)
m->flags |= GMOUSE_STMPE811_FLG_TOUCHED;
#endif
write_reg(m, STMPE811_REG_INT_CTRL, 0x01); // Level interrupt, enable interrupts
release_bus(m);
return TRUE;
}
static void read_xyz(GMouse* m, GMouseReading* pdr)
{
bool_t clearfifo; // Do we need to clear the FIFO
// Assume not touched.
pdr->buttons = 0;
pdr->z = 0;
aquire_bus(m);
#if GMOUSE_STMPE811_GPIO_IRQPIN
// Check if the touch controller IRQ pin has gone off
clearfifo = false;
if(getpin_irq(m)) {
write_reg(m, STMPE811_REG_INT_STA, 0xFF); // clear all interrupts
if (read_byte(m, STMPE811_REG_TSC_CTRL) & 0x80) // set the new touched status
m->flags |= GMOUSE_STMPE811_FLG_TOUCHED;
else
m->flags &= ~GMOUSE_STMPE811_FLG_TOUCHED;
clearfifo = TRUE; // only take the last FIFO reading
}
#else
// Poll to get the touched status
uint16_t last_touched;
last_touched = m->flags;
if (read_byte(m, STMPE811_REG_TSC_CTRL) & 0x80) // set the new touched status
m->flags |= GMOUSE_STMPE811_FLG_TOUCHED;
else
m->flags &= ~GMOUSE_STMPE811_FLG_TOUCHED;
clearfifo = ((m->flags ^ last_touched) & GMOUSE_STMPE811_FLG_TOUCHED) ? TRUE : FALSE;
#endif
// If not touched don't do any more
if ((m->flags &= ~GMOUSE_STMPE811_FLG_TOUCHED)) {
// Clear the fifo if it is too full
#if !GMOUSE_STMPE811_SLOW_CPU
if (!clearfifo && (read_byte(m, STMPE811_REG_FIFO_STA) & 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) */
pdr->x = (coord_t)read_word(m, STMPE811_REG_TSC_DATA_X);
pdr->y = (coord_t)read_word(m, STMPE811_REG_TSC_DATA_Y);
pdr->z = (coord_t)read_byte(m, STMPE811_REG_TSC_DATA_Z);
} while(clearfifo && !(read_byte(m, STMPE811_REG_FIFO_STA) & 0x20));
#if GMOUSE_STMPE811_SELF_CALIBRATE
// Rescale X,Y,Z - If we are using self-calibration
pdr->x = gdispGGetWidth(m->display) - pdr->x / (4096/gdispGGetWidth(m->display));
pdr->y = pdr->y / (4096/gdispGGetHeight(m->display));
#endif
/* Force another read if we have more results */
if (!clearfifo && !(read_byte(m, STMPE811_REG_FIFO_STA) & 0x20))
_gmouseWakeup(m);
}
release_bus(m);
}
const GMouseVMT const GMOUSE_DRIVER_VMT[1] = {{
{
GDRIVER_TYPE_TOUCH,
#if GMOUSE_STMPE811_SELF_CALIBRATE
GMOUSE_VFLG_TOUCH | GMOUSE_VFLG_ONLY_DOWN | GMOUSE_VFLG_POORUPDOWN,
#else
GMOUSE_VFLG_TOUCH | GMOUSE_VFLG_ONLY_DOWN | GMOUSE_VFLG_POORUPDOWN | GMOUSE_VFLG_CALIBRATE | GMOUSE_VFLG_CAL_TEST,
#endif
sizeof(GMouse) + GMOUSE_STMPE811_BOARD_DATA_SIZE,
_gmouseInitDriver,
_gmousePostInitDriver,
_gmouseDeInitDriver
},
255, // z_max
0, // z_min
200, // z_touchon
20, // z_touchoff
{ // pen_jitter
GMOUSE_STMPE811_PEN_CALIBRATE_ERROR, // calibrate
GMOUSE_STMPE811_PEN_CLICK_ERROR, // click
GMOUSE_STMPE811_PEN_MOVE_ERROR // move
},
{ // finger_jitter
GMOUSE_STMPE811_FINGER_CALIBRATE_ERROR, // calibrate
GMOUSE_STMPE811_FINGER_CLICK_ERROR, // click
GMOUSE_STMPE811_FINGER_MOVE_ERROR // move
},
MouseInit, // init
0, // deinit
read_xyz, // get
0, // calsave
0 // calload
}};
#endif /* GFX_USE_GINPUT && GINPUT_NEED_MOUSE */
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