David Smart
An example program using the RA8875 Display controller with the touch-screen option.
Revision 4:daf56708ae86, committed 2018-08-17
- Comitter:
- WiredHome
- Date:
- Fri Aug 17 11:32:53 2018 +0000
- Parent:
- 3:45ef2ebfeebc
- Child:
- 5:e627ad34c2a6
- Commit message:
- Remove unnecessary local function and add initial support for large screen.
Changed in this revision
--- a/RA8875.lib Sat Jan 23 17:54:15 2016 +0000 +++ b/RA8875.lib Fri Aug 17 11:32:53 2018 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/users/WiredHome/code/RA8875/#fc60bfa0199f +http://mbed.org/users/WiredHome/code/RA8875/#ad2450fc3dc3
--- a/main.cpp Sat Jan 23 17:54:15 2016 +0000
+++ b/main.cpp Fri Aug 17 11:32:53 2018 +0000
@@ -2,25 +2,42 @@
#include "mbed.h" // tested with v112
#include "RA8875.h" // tested with v102
-LocalFileSystem local("local");
-RA8875 lcd(p5, p6, p7, p12, NC, "tft"); // MOSI, MISO, SCK, /ChipSelect, /reset, name
+
+const char * PROG_NAME = "RA8875 Touch Colors";
+const char * BUILD_DATE = __DATE__ " " __TIME__;
+
+// Define this for 800x480 panel, undefine for 480x272
+//#define BIG_SCREEN
+
+// Define this for Cap touch panel, undefine for resistive
+//#define CAP_TOUCH
+
+#ifdef CAP_TOUCH
+RA8875 lcd(p5, p6, p7, p12, NC, p9,p10,p13, "tft"); // SPI:{MOSI,MISO,SCK,/ChipSelect,/reset}, I2C:{SDA,SCL,/IRQ}, name
+#else
+RA8875 lcd(p5, p6, p7, p12, NC, "tft"); // SPI:{MOSI,MISO,SCK,/ChipSelect,/reset}, name
+LocalFileSystem local("local"); // access to calibration file for resistive touch.
+#endif
+
+#ifdef BIG_SCREEN
+ #define LCD_W 800
+ #define LCD_H 480
+ #define LCD_C 8 // color - bits per pixel
+ #define DEF_RADIUS 50 // default radius of the fingerprint
+ #define BL_NORM 25 // Backlight Normal setting (0 to 255)
+#else
+ #define LCD_W 480
+ #define LCD_H 272
+ #define LCD_C 8 // color - bits per pixel
+ #define DEF_RADIUS 20 // default radius of the fingerprint
+ #define BL_NORM 25 // Backlight Normal setting (0 to 255)
+#endif
+
Serial pc(USBTX, USBRX);
-extern "C" void mbed_reset();
-
-
#define min(a,b) ((a<b)?a:b)
#define max(a,b) ((a>b)?a:b)
-bool Intersect(rect_t rect, point_t p)
-{
- if (p.x >= min(rect.p1.x, rect.p2.x) && p.x <= max(rect.p1.x, rect.p2.x)
- && p.y >= min(rect.p1.y, rect.p2.y) && p.y <= max(rect.p1.y, rect.p2.y))
- return true;
- else
- return false;
-}
-
int GetScreenCapture(void)
{
char fqfn[50];
@@ -31,7 +48,7 @@
snprintf(fqfn, sizeof(fqfn), "/local/Screen%02d.bmp", i);
FILE * fh = fopen(fqfn, "rb");
if (!fh) {
- lcd.PrintScreen(0,0,480,272,fqfn);
+ lcd.PrintScreen(0,0,LCD_W,LCD_H,fqfn);
pc.printf(" as /local/Screen%02d.bmp\r\n", i);
return i;
} else {
@@ -41,18 +58,87 @@
return 0;
}
-int main()
+const char * Bitstream(uint16_t value)
+{
+ static char buffer[17];
+ char * p = buffer;
+ uint16_t mask = 0x8000;
+
+ do {
+ *p++ = (value & mask) ? '1' : '0';
+ mask >>= 1;
+ } while (mask);
+ *p = '\0';
+ return buffer;
+}
+
+
+// Calibrate the resistive touch screen, and store the data on the
+// local file system.
+//
+void CalibrateTS(void)
{
+ FILE * fh;
+ tpMatrix_t matrix;
+ RetCode_t r;
+ Timer testperiod;
+
+ r = lcd.TouchPanelCalibrate("Calibrate the touch panel", &matrix);
+ if (r == noerror) {
+ fh = fopen("/local/tpcal.cfg", "wb");
+ if (fh) {
+ fwrite(&matrix, sizeof(tpMatrix_t), 1, fh);
+ fclose(fh);
+ printf(" tp cal written.\r\n");
+ lcd.cls();
+ } else {
+ printf(" couldn't open tpcal file.\r\n");
+ }
+ } else {
+ printf("error return: %d\r\n", r);
+ }
+ lcd.cls();
+}
+
+// Try to load a previous resistive touch screen calibration from storage. If it
+// doesn't exist, activate the touch screen calibration process.
+//
+void InitTS(void)
+{
+ FILE * fh;
+ tpMatrix_t matrix;
+
+ fh = fopen("/local/tpcal.cfg", "rb");
+ if (fh) {
+ fread(&matrix, sizeof(tpMatrix_t), 1, fh);
+ fclose(fh);
+ lcd.TouchPanelSetMatrix(&matrix);
+ printf(" tp cal loaded.\r\n");
+ } else {
+ CalibrateTS();
+ }
+}
+
+
+int main() {
pc.baud(460800); // I like a snappy terminal, so crank it up!
- pc.printf("\r\nRA8875 Touch Colors - Build " __DATE__ " " __TIME__ "\r\n");
+ pc.printf("\r\n%s Build %s\r\n", PROG_NAME, BUILD_DATE);
pc.printf("Turning on display\r\n");
- lcd.init();
- lcd.TouchPanelCalibrate("Calibrate the touch panel");
+ lcd.init(LCD_W,LCD_H,LCD_C);
+ lcd.TouchPanelInit();
+ lcd.Backlight_u8(BL_NORM);
+
+ #ifndef CAP_TOUCH
+ InitTS(); // resistive touch calibration
+ #endif
lcd.cls();
+
+ lcd.printf("%s\r\nBuild %s", PROG_NAME, BUILD_DATE);
// +----------------------------------------------------+
- // | (x,y) (xxx,yyy) [Capture] rgb (RR,GG,BB) |
+ // | Prog Name [Capture] (x,y) (xxx,yyy) |
+ // | Build Date [Capture] rgb (RR,GG,BB) |
// | +------------------------------------------------+ | y = 50
// | | Sample Shown Here | |
// | +------------------------------------------------+ | y = 89
@@ -66,21 +152,21 @@
// | | | |
// | +------------------------------------------------+ | y = 239
// +----------------------------------------------------+ y = 271
- // 10 470
+ // 10 w-10
rect_t RGBList[] = {
- { 10,100, 470,139 }, // R
- { 10,150, 470,189 }, // G
- { 10,200, 470,239 }, // B
- { 10, 50, 470, 89 } // This for the Sample
+ { 10,100, LCD_W-10,139 }, // R
+ { 10,150, LCD_W-10,189 }, // G
+ { 10,200, LCD_W-10,239 }, // B
+ { 10, 50, LCD_W-10, 89 } // This for the Sample
};
- rect_t PrintScreenRect = { 235-30, 5, 235+30, 40};
+ rect_t PrintScreenRect = { LCD_W/2-30, 5, LCD_W/2+30, 40};
lcd.fillrect(RGBList[0], Red);
lcd.fillrect(RGBList[1], Green);
lcd.fillrect(RGBList[2], Blue);
lcd.fillrect(PrintScreenRect, Gray);
lcd.foreground(Blue);
lcd.background(Gray);
- lcd.puts(235-28, 15, "Capture");
+ lcd.puts(LCD_W/2-28, 15, "Capture");
lcd.background(Black);
color_t rgb = Black;
uint8_t rgbVal[3] = { 0, 0, 0 };
@@ -90,20 +176,21 @@
if (lcd.TouchPanelReadable(&p)) {
lcd.foreground(Blue);
- lcd.SetTextCursor(10, 15);
+ lcd.SetTextCursor(LCD_W-72, 0);
lcd.printf("(%3d,%3d)", p.x, p.y);
- if (Intersect(PrintScreenRect, p)) {
+ if (lcd.Intersect(PrintScreenRect, p)) {
GetScreenCapture();
}
for (int i=0; i<3; i++) {
- if (Intersect(RGBList[i], p)) {
- uint8_t mag = (255 * (p.x - RGBList[i].p1.x)) / (RGBList[i].p2.x - RGBList[i].p1.x);
+ if (lcd.Intersect(RGBList[i], p)) {
+ uint8_t mag = (255 * (float)(p.x - RGBList[i].p1.x)) / (float)(RGBList[i].p2.x - RGBList[i].p1.x);
rgbVal[i] = mag;
- lcd.SetTextCursor(380, 15);
+ lcd.SetTextCursor(LCD_W-80, 16);
lcd.foreground(Blue);
lcd.printf("(%02X,%02X,%02X)", rgbVal[0], rgbVal[1], rgbVal[2]);
rgb = RGB(rgbVal[0], rgbVal[1], rgbVal[2]);
+ pc.printf("RGB: %04X %s\r\n", rgb, Bitstream(rgb));
lcd.fillrect(RGBList[3], rgb);
break;
}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os.lib Fri Aug 17 11:32:53 2018 +0000 @@ -0,0 +1,1 @@ +https://github.com/ARMmbed/mbed-os/#f8b140f8d7cb226e41486c5df66ac4f3ce699219
--- a/mbed.bld Sat Jan 23 17:54:15 2016 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://mbed.org/users/mbed_official/code/mbed/builds/6f327212ef96 \ No newline at end of file