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BT81X-TouchDemo.spin
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BT81X-TouchDemo.spin
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{
---------------------------------------------------------------------------------------------------
Filename: BT81X-TouchDemo.spin
Description: Demo of the BT81x driver touchscreen functionality
Author: Jesse Burt
Started: May 27, 2020
Updated: Aug 30, 2024
Copyright (c) 2024 - See end of file for terms of use.
---------------------------------------------------------------------------------------------------
NOTE: This demo will write touchscreen calibration data to the Propeller's EEPROM
(high 32k area)
}
CON
_clkmode = xtal1+pll16x
_xinfreq = 5_000_000
' -- User-modifiable constants
BRIGHTNESS = 100 ' Initial brightness (0..128)
{ touchscreen calibration storage }
ERASE_TS_CAL= false ' set non-zero to delete TS cal from Propeller EE
EE_MAGICADDR= $8000 ' EE address of 'magic' number (cal. identifier)
EE_CALBASE = EE_MAGICADDR+4 ' EE base address of calibration data (24 bytes)
' NOTE: These need to be above the lower 32kbytes
' of the EEPROM to avoid being overwritten by
' writing a Propeller binary image
' --
BUTTON_W = 100
BUTTON_H = 50
' Uncomment one of the following, depending on your display size/resolution
' NOTE: WIDTH, HEIGHT, XMAX, YMAX, CENTERX, CENTERY symbols are defined
' in the display timings file.
#include "eve3-lcdtimings.800x480.spinh"
'#include "eve3-lcdtimings.480x272.spinh"
'#include "eve3-lcdtimings.320x240.spinh"
'#include "eve3-lcdtimings.320x102.spinh"
OBJ
time: "time"
mem: "memory.eeprom.24xxxx" | SCL=28, SDA=29, I2C_FREQ=1_000_000, I2C_ADDR=%000
ser: "com.serial.terminal.ansi" | SER_BAUD=115_200
eve: "display.lcd.bt81x" | CS=0, SCK=1, MOSI=2, MISO=3, RST=4
' NOTE: Pull RST high (tip: tie to Propeller reset) and define as -1 if unused
VAR
long _ts[6]
PUB main() | count, idle, state, x, y, t1, t2, t3, t4
setup()
eve.set_brightness(BRIGHTNESS)
eve.clear_color(0, 0, 0) ' clear screen black
eve.clear()
eve.ts_oversample_factor(15) ' 0..15 (higher numbers give smoother response
' but with more current draw)
update_btn(0) ' set initial button state
idle := TRUE
count := 0
repeat
state := eve.tag_active() ' get state of button
if ( state == 1 ) ' pushed
if ( idle == TRUE ) ' mark not idle so only one
idle := FALSE ' push is registered if held
update_btn(1) ' down
count++
if ( count == 3 ) ' if pressed 3 times, exit the
quit ' loop
elseif ( state == 0 ) ' not pushed
if ( idle == FALSE ) ' mark idle
idle := TRUE
update_btn(0) ' redraw button up
update_scrlbar(0) ' set initial scrollbar state
repeat
state := eve.tag_active()
if ( state == 1 ) ' only update the scrollbar pos
x := eve.ts_xy() >> 16 ' if it's being touched
update_scrlbar(x)
if ( x > (WIDTH-20) ) ' if pulled near the right edge
quit ' of the screen, exit loop
t1 := t2 := t3 := t4 := 0
idle := TRUE
update_tog(0, 0, 0, 0) ' set toggles' initial state
repeat
case state := eve.tag_active() ' which toggle was touched?
1: ' toggle #1
if ( idle == TRUE )
idle := FALSE
t1 ^= $FFFF ' flip all bits to change state
update_tog(t1, t2, t3, t4)
2: ' toggle #2
if ( idle == TRUE )
idle := FALSE
t2 ^= $FFFF
update_tog(t1, t2, t3, t4)
3: ' toggle #3
if ( idle == TRUE )
idle := FALSE
t3 ^= $FFFF
update_tog(t1, t2, t3, t4)
4: ' toggle #4
if ( idle == TRUE )
idle := FALSE
t4 ^= $FFFF
update_tog(t1, t2, t3, t4)
other:
if ( idle == FALSE )
idle := TRUE
if ( (t1 == $FFFF) and (t2 == $FFFF) and (t3 == $FFFF) and (t4 == $FFFF) )
quit ' if all toggles are switched
' on, end the demo
eve.set_brightness(0)
eve.powered(FALSE)
repeat
PUB update_btn(state) | btn_cx, btn_cy
btn_cx := CENTERX - (BUTTON_W / 2)
btn_cy := CENTERY - (BUTTON_H / 2)
eve.wait_rdy() ' wait for EVE to be ready
eve.dl_start() ' begin list of graphics cmds
eve.clear_color(0, 0, 0) ' indentation of this block isn't necessary;
eve.clear() ' it's only a visual cue it runs inside dl_*()
eve.widget_bgcolor($ff_ff_ff) ' button colors (r_g_b)
eve.widget_fgcolor($55_55_55) '
if ( state ) ' button pressed
eve.color_rgb(255, 255, 255) ' button text color (pressed)
eve.tag_attach(1) ' tag or id# for this button
eve.button(btn_cx, btn_cy, 100, 50, 30, 0, @"TEST")
else
eve.color_rgb(0, 0, 192) ' button text color (up)
eve.tag_attach(1)
eve.button(btn_cx, btn_cy, 100, 50, 30, 0, @"TEST")
eve.dl_end() ' end list; display everything
PUB update_scrlbar(val) | w, h, x, y, sz
sz := 10 ' scrollbar size
w := WIDTH-(sz << 1)-1 ' width
h := 20 ' height
x := 0+sz
y := HEIGHT-h-1
eve.wait_rdy()
eve.dl_start()
eve.clear_color(0, 0, 0)
eve.clear()
eve.widget_bgcolor($55_55_55)
eve.widget_fgcolor($00_00_C0)
eve.tag_attach(1)
eve.scrollbar(x, y, w, h, 0, x #> val <# w, sz, w)
eve.dl_end()
PUB update_tog(t1, t2, t3, t4) | tag, tmp, x, y, w, sw, h
w := 60 ' toggle switch width
h := 24 ' and height
x := CENTERX-(w/2) ' x and y
y := CENTERY-(h*4) ' coords
eve.wait_rdy()
eve.dl_start()
eve.clear_color(0, 0, 0)
eve.clear()
eve.widget_bgcolor($55_55_55)
eve.widget_fgcolor($00_00_C0)
eve.tag_attach(1) ' different
eve.toggle(x, y + (1 * (h*2)), w, h, 0, t1, string("OFF", $FF, "ON"))
eve.tag_attach(2) ' tag
eve.toggle(x, y + (2 * (h*2)), w, h, 0, t2, string("OFF", $FF, "ON"))
eve.tag_attach(3) ' for each
eve.toggle(x, y + (3 * (h*2)), w, h, 0, t3, string("OFF", $FF, "ON"))
eve.tag_attach(4) ' button
eve.toggle(x, y + (4 * (h*2)), w, h, 0, t4, string("OFF", $FF, "ON"))
eve.dl_end()
PRI ts_cal()
' Calibrate the touchscreen (resistive only)
eve.ts_set_sens(1200) ' typical value, per BRT_AN_033
eve.wait_rdy()
eve.dl_start()
eve.clear()
eve.str(80, 30, 27, eve.OPT_CENTER, @"Please tap on the dot")
eve.ts_cal()
eve.dl_end()
eve.wait_rdy()
_ts[0] := eve.TCAL
eve.ts_rd_cal_matrix(@_ts+4) ' read in the touch calibration results
mem.wr_block_lsbf(EE_MAGICADDR, @_ts, 28) ' to high EEPROM (req's >= 64kbyte EE)
PUB setup()
ser.start()
time.msleep(30)
ser.clear()
ser.strln(@"Serial terminal started")
if ( eve.start(@_disp_setup) )
ser.strln(@"BT81x driver started")
else
ser.str(@"BT81x driver failed to start - halting")
repeat
if ( mem.start() )
ser.strln(@"EEPROM driver started")
if ( ERASE_TS_CAL )
erase_tscal()
else
ser.strln(@"EEPROM driver failed to start - halting")
repeat
if ( eve.model_id() == eve.BT816 ) ' resistive TS?
if ( mem.rd_long_lsbf(EE_MAGICADDR) == eve.TCAL )
{ look for magic number in EEPROM }
ser.strln(@"calibration found - restoring")
mem.rd_block_lsbf(@_ts, EE_CALBASE, 24) ' read the calibration matrix
eve.ts_wr_cal_matrix(@_ts) ' write it to EVE
else
{ no calibration stored in EE - perform calibration }
ser.strln(@"no calibration found")
ts_cal()
PUB erase_tscal() | i
' Erase calibration data and magic number from EEPROM
ser.str(@"erasing touchscreen calibration from EEPROM...")
repeat i from 0 to 27
mem.wr_byte(EE_MAGICADDR + i, $00)
ser.strln(@"done")
DAT
{
Copyright 2024 Jesse Burt
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
associated documentation files (the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge, publish, distribute,
sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
}