STMPE811 - initial
This commit is contained in:
Joel Bodenmann
parent
49550c4999
commit
d6b75429b2
3 changed files with 185 additions and 166 deletions
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@ -55,15 +55,7 @@
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/* Driver local functions. */
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/*===========================================================================*/
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#if defined(GDISP_USE_CUSTOM_BOARD) && GDISP_USE_CUSTOM_BOARD
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/* Include the user supplied board definitions */
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#include "gdisp_lld_board.h"
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#elif defined(BOARD_EMBEST_DMSTF4BB)
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#include "gdisp_lld_board_embest_dmstf4bb.h"
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#else
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/* Include the user supplied board definitions */
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#include "gdisp_lld_board.h"
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#endif
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// Some common routines and macros
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#define write_reg(reg, data) { write_index(reg); write_data(data); }
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@ -39,13 +39,21 @@
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#if defined(GINPUT_MOUSE_USE_CUSTOM_BOARD) && GINPUT_MOUSE_USE_CUSTOM_BOARD
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#include "ginput_lld_mouse_board.h"
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#elif defined(BOARD_EMBEST_DMSTF4BB)
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#elif defined(BOARD_EMBEST_DMST4BB)
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#include "ginput_lld_mouse_board_embest_dmstf4bb.h"
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#else
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#include "ginput_lld_mouse_board_example.h"
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#endif
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static coord_t lastx, lasty, lastz;
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#ifndef STMP811_NO_GPIO_IRQPIN
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#define STMP811_NO_GPIO_IRQPIN FALSE
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#endif
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#ifndef STMP811_SLOW_CPU
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#define STMP811_SLOW_CPU FALSE
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#endif
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static coord_t x, y, z;
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static uint8_t touched;
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/* set the active window of the stmpe811. bl is bottom left, tr is top right */
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static void setActiveWindow(uint16_t bl_x, uint16_t bl_y, uint16_t tr_x, uint16_t tr_y)
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@ -69,20 +77,28 @@ void ginput_lld_mouse_init(void)
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chThdSleepMilliseconds(10);
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write_reg(STMPE811_REG_SYS_CTRL2, 1, 0x0C); // Temperature sensor clock off, GPIO clock off, touch clock on, ADC clock on
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write_reg(STMPE811_REG_INT_EN, 1, 0x02); // Interrupt on INT pin when FIFO is equal or above threshold value OR touch is detected
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#if STMP811_NO_GPIO_IRQPIN
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write_reg(STMPE811_REG_INT_EN, 1, 0x00); // Interrupt on INT pin when touch is detected
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#else
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write_reg(STMPE811_REG_INT_EN, 1, 0x01); // Interrupt on INT pin when touch is detected
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#endif
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write_reg(STMPE811_REG_ADC_CTRL1, 1, 0x48); // ADC conversion time = 80 clock ticks, 12-bit ADC, internal voltage refernce
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chThdSleepMilliseconds(2);
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write_reg(STMPE811_REG_ADC_CTRL2, 1, 0x01); // ADC speed 3.25MHz
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write_reg(STMPE811_REG_GPIO_AF, 1, 0x00); // GPIO alternate function - OFF
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write_reg(STMPE811_REG_TSC_CFG, 1, 0x9A); // Averaging 4, touch detect delay 500 us, panel driver settling time 500 us
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write_reg(STMPE811_REG_FIFO_TH, 1, 0x01); // FIFO threshold = 1
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write_reg(STMPE811_REG_FIFO_TH, 1, 0x40); // FIFO threshold = 64
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write_reg(STMPE811_REG_FIFO_STA, 1, 0x01); // FIFO reset enable
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write_reg(STMPE811_REG_FIFO_STA, 1, 0x00); // FIFO reset disable
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write_reg(STMPE811_REG_TSC_FRACT_XYZ, 1, 0x07); // Z axis data format
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write_reg(STMPE811_REG_TSC_I_DRIVE, 1, 0x01); // 50mA touchscreen line current
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write_reg(STMPE811_REG_TSC_CTRL, 1, 0x00); // X&Y&Z
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write_reg(STMPE811_REG_TSC_CTRL, 1, 0x01); // X&Y&Z, TSC enable
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write_reg(STMPE811_REG_INT_STA, 1, 0xFF); // Clear all interrupts
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#if !STMP811_NO_GPIO_IRQPIN
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touched = (uint8_t)read_reg(STMPE811_REG_TSC_CTRL, 1) & 0x80;
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#endif
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write_reg(STMPE811_REG_INT_CTRL, 1, 0x01); // Level interrupt, enable intrrupts
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}
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@ -102,57 +118,66 @@ void ginput_lld_mouse_init(void)
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*/
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void ginput_lld_mouse_get_reading(MouseReading *pt)
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{
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//uint16_t buf;
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uint8_t int_status;
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bool_t clearfifo; // Do we need to clear the FIFO
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#if STMP811_NO_GPIO_IRQPIN
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// Poll to get the touched status
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uint8_t last_touched;
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last_touched = touched;
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touched = (uint8_t)read_reg(STMPE811_REG_TSC_CTRL, 1) & 0x80;
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clearfifo = (touched != last_touched);
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#else
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// Check if the touch controller IRQ pin has gone off
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clearfifo = false;
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if(getpin_pressed()) { // please rename this to getpin_irq
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write_reg(STMPE811_REG_INT_STA, 1, 0xFF); // clear all interrupts
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touched = (uint8_t)read_reg(STMPE811_REG_TSC_CTRL, 1) & 0x80; // set the new touched status
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clearfifo = true; // only take the last FIFO reading
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}
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#endif
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// If not touched, return the previous results
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if (!getpin_pressed()) {
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pt->x = lastx;
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pt->y = lasty;
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if (!touched) {
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pt->x = x;
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pt->y = y;
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pt->z = 0;
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pt->buttons = 0;
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return;
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}
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// Find out what caused an interrupt
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int_status = read_reg(STMPE811_REG_INT_STA, 1);
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#if !STMP811_SLOW_CPU
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if (!clearfifo && (read_reg(STMPE811_REG_FIFO_STA, 1) & 0xD0))
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#endif
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clearfifo = true;
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// If it is TOUCH interrupt, clear it and go on
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if (int_status & 0x02) {
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do {
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/* Get the X, Y, Z values */
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/* This could be done in a single 4 byte read to STMPE811_REG_TSC_DATA_XYZ (incr or non-incr) */
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x = (coord_t)read_reg(STMPE811_REG_TSC_DATA_X, 2);
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y = (coord_t)read_reg(STMPE811_REG_TSC_DATA_Y, 2);
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z = (coord_t)read_reg(STMPE811_REG_TSC_DATA_Z, 1);
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} while(clearfifo && !(read_reg(STMPE811_REG_FIFO_STA, 1) & 0x20));
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uint8_t size = 0;
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size = read_reg(STMPE811_REG_FIFO_SIZE, 1);
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// Rescale X,Y,Z - X & Y don't need scaling when you are using calibration!
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#if !GINPUT_MOUSE_NEED_CALIBRATION
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x = gdispGetWidth() - x / (4096/gdispGetWidth());
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y = y / (4096/gdispGetHeight());
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#endif
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z = (((z&0xFF) * 100)>>8) + 1;
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if (size) {
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uint8_t buffer[size * 4];
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read_reg_n(STMPE811_REG_TSC_DATA_AI, size * 4, buffer);
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lastx = (coord_t)((buffer[0] << 4) | (buffer[1] >> 4));
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lasty = (coord_t)(((buffer[1] & 0x0F) << 8) | buffer[2]);
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lastz = (coord_t)buffer[3];
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/* Get the X value */
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//buf = read_reg(STMPE811_REG_TSC_DATA_X, 2);
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//lastx = (coord_t)(buf);
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/* Get the Y value */
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//buf = read_reg(STMPE811_REG_TSC_DATA_Y, 2);
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//lasty = (coord_t)(buf);
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/* Get the Z value */
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//buf = read_reg(STMPE811_REG_TSC_DATA_Z, 1);
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//lastz = (buf & 0x00FF);
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// Return the results. ADC gives values from 0 to 2^12
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pt->x = 320 - lastx / 13;
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pt->y = lasty / 17;
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pt->z = lastz;
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// Return the results. ADC gives values from 0 to 2^12 (4096)
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pt->x = x;
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pt->y = y;
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pt->z = z;
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pt->buttons = GINPUT_TOUCH_PRESSED;
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}
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write_reg(STMPE811_REG_INT_STA, 1, 0x02);
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}
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/* Force another read if we have more results */
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if (!clearfifo && !(read_reg(STMPE811_REG_FIFO_STA, 1) & 0x20))
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ginputMouseWakeup();
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}
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#endif /* GFX_USE_GINPUT && GINPUT_NEED_MOUSE */
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/** @} */
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@ -39,6 +39,8 @@
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#define GINPUT_MOUSE_MAX_CLICK_JITTER 10
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#define GINPUT_MOUSE_MAX_MOVE_JITTER 2
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#define GINPUT_MOUSE_CLICK_TIME 500
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#define STMP811_SLOWER_RESPONSE FALSE
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#define STMP811_NO_GPIO_IRQPIN FALSE
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#endif /* _LLD_GINPUT_MOUSE_CONFIG_H */
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/** @} */
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