diff options
Diffstat (limited to 'drivers/ginput/touch/STMPE811/gmouse_lld_STMPE811.c')
-rw-r--r-- | drivers/ginput/touch/STMPE811/gmouse_lld_STMPE811.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/drivers/ginput/touch/STMPE811/gmouse_lld_STMPE811.c b/drivers/ginput/touch/STMPE811/gmouse_lld_STMPE811.c new file mode 100644 index 00000000..6951f3ab --- /dev/null +++ b/drivers/ginput/touch/STMPE811/gmouse_lld_STMPE811.c @@ -0,0 +1,164 @@ +/* + * 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 */ + |