From d6b75429b25bec5f83cd9eb1db21a8337454d5a6 Mon Sep 17 00:00:00 2001 From: Joel Bodenmann Date: Fri, 29 Mar 2013 18:10:22 +0100 Subject: STMPE811 - initial --- drivers/ginput/touch/STMPE811/ginput_lld_mouse.c | 341 ++++++++++++----------- 1 file changed, 183 insertions(+), 158 deletions(-) (limited to 'drivers/ginput/touch/STMPE811/ginput_lld_mouse.c') diff --git a/drivers/ginput/touch/STMPE811/ginput_lld_mouse.c b/drivers/ginput/touch/STMPE811/ginput_lld_mouse.c index 4f648a78..09360dbc 100644 --- a/drivers/ginput/touch/STMPE811/ginput_lld_mouse.c +++ b/drivers/ginput/touch/STMPE811/ginput_lld_mouse.c @@ -1,158 +1,183 @@ -/* - ChibiOS/GFX - Copyright (C) 2012, 2013 - Joel Bodenmann aka Tectu - - 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 . -*/ - -/** - * @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 - -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 - chThdSleepMilliseconds(10); - - write_reg(STMPE811_REG_SYS_CTRL2, 1, 0x0C); // Temperature sensor clock off, GPIO clock off, touch clock on, ADC clock on - write_reg(STMPE811_REG_INT_EN, 1, 0x02); // 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, 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, 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, 0x01); // X&Y&Z, 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; - uint8_t int_status; - - // If not touched, return the previous results - if (!getpin_pressed()) { - pt->x = lastx; - pt->y = lasty; - pt->z = 0; - pt->buttons = 0; - return; - } - - // Find out what caused an interrupt - int_status = read_reg(STMPE811_REG_INT_STA, 1); - - // If it is TOUCH interrupt, clear it and go on - if (int_status & 0x02) { - - uint8_t size = 0; - size = read_reg(STMPE811_REG_FIFO_SIZE, 1); - - if (size) { - uint8_t buffer[size * 4]; - read_reg_n(STMPE811_REG_TSC_DATA_AI, size * 4, buffer); - - lastx = (coord_t)((buffer[0] << 4) | (buffer[1] >> 4)); - lasty = (coord_t)(((buffer[1] & 0x0F) << 8) | buffer[2]); - lastz = (coord_t)buffer[3]; - - /* 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. ADC gives values from 0 to 2^12 - pt->x = 320 - lastx / 13; - pt->y = lasty / 17; - pt->z = lastz; - pt->buttons = GINPUT_TOUCH_PRESSED; - } - - write_reg(STMPE811_REG_INT_STA, 1, 0x02); - } -} - -#endif /* GFX_USE_GINPUT && GINPUT_NEED_MOUSE */ -/** @} */ +/* + ChibiOS/GFX - Copyright (C) 2012, 2013 + Joel Bodenmann aka Tectu + + 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 . +*/ + +/** + * @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_DMST4BB) + #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_pressed()) { // 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 */ +/** @} */ + -- cgit v1.2.3