Ryan
/
Adafruit_RA8875
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

use internal VREF. also some minimal calibration

This commit is contained in:
ladyada 2013-10-12 19:52:26 -04:00
parent 08c25fa361
commit 72b11ed071
2 changed files with 12 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
Adafruit_RA8875.cpp
View File

@ -418,12 +418,12 @@ void Adafruit_RA8875::touchEnable(boolean on)
{
/* Enable Touch Panel (Reg 0x70) */
writeReg(RA8875_TPCR0, RA8875_TPCR0_ENABLE |
RA8875_TPCR0_WAIT_4096CLK |
RA8875_TPCR0_WAIT_4096CLK |
RA8875_TPCR0_WAKEDISABLE |
RA8875_TPCR0_ADCCLK_DIV4); // 10mhz max!
RA8875_TPCR0_ADCCLK_DIV8); // 10mhz max!
/* Set Auto Mode (Reg 0x71) */
writeReg(RA8875_TPCR1, RA8875_TPCR1_AUTO |
RA8875_TPCR1_VREFEXT |
// RA8875_TPCR1_VREFEXT |
RA8875_TPCR1_DEBOUNCE);
/* Enable TP INT */
writeReg(RA8875_INTC1, readReg(RA8875_INTC1) | RA8875_INTC1_TP);

14
examples/buildtest/buildtest.ino
View File

@ -80,11 +80,13 @@ void setup()
Serial.println("Waiting for touch events ...");
}
#define XMIN 105
#define XMAX 975
#define YMIN 130
#define YMAX 900
void loop()
{
float xScale = 1024.0F/tft.width();
float yScale = 1024.0F/tft.height();
/* Wait around for touch events */
if (! digitalRead(RA8875_INT))
{
@ -94,7 +96,9 @@ void loop()
tft.touchRead(&tx, &ty);
Serial.print(tx); Serial.print(", "); Serial.println(ty);
/* Draw a circle */
tft.fillCircle((uint16_t)(tx/xScale), (uint16_t)(ty/yScale), 10, RA8875_WHITE);
tx = map(tx, XMIN, XMAX, 0, tft.width());
ty = map(ty, YMIN, YMAX, 0, tft.height());
tft.fillCircle(tx, ty, 5, RA8875_WHITE);
}
}
}
}