Kerry Martin
KSM edits to RA8875
Diff: RA8875_Touch_FT5206.cpp
- Revision:
- 165:695c24cc5197
- Child:
- 166:53fd4a876dac
diff -r 76edd7d9cb68 -r 695c24cc5197 RA8875_Touch_FT5206.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/RA8875_Touch_FT5206.cpp Sun Feb 24 00:40:00 2019 +0000
@@ -0,0 +1,149 @@
+
+
+#include "RA8875.h"
+
+//#define DEBUG "RAFT" // RA8875 FT5206
+// ...
+// INFO("Stuff to show %d", var); // new-line is automatically appended
+//
+#if (defined(DEBUG) && !defined(TARGET_LPC11U24))
+#define INFO(x, ...) std::printf("[INF %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
+#define WARN(x, ...) std::printf("[WRN %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
+#define ERR(x, ...) std::printf("[ERR %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
+static void HexDump(const char * title, const uint8_t * p, int count)
+{
+ int i;
+ char buf[100] = "0000: ";
+
+ if (*title)
+ INFO("%s", title);
+ for (i=0; i<count; ) {
+ sprintf(buf + strlen(buf), "%02X ", *(p+i));
+ if ((++i & 0x0F) == 0x00) {
+ INFO("%s", buf);
+ if (i < count)
+ sprintf(buf, "%04X: ", i);
+ else
+ buf[0] = '\0';
+ }
+ }
+ if (strlen(buf))
+ INFO("%s", buf);
+}
+#else
+#define INFO(x, ...)
+#define WARN(x, ...)
+#define ERR(x, ...)
+#define HexDump(a, b, c)
+#endif
+
+
+
+// Translate from FT5206 Event Flag to Touch Code to API-match the
+// alternate resistive touch screen driver common in the RA8875
+// displays.
+static const TouchCode_t FT5206_EventFlagToTouchCode[4] = {
+ touch, // 00b Put Down
+ release, // 01b Put Up
+ held, // 10b Contact
+ no_touch // 11b Reserved
+};
+
+
+RetCode_t RA8875::FT5206_Init() {
+ char data[2] = {FT5206_DEVICE_MODE, 0};
+
+ m_i2c->write(m_addr, data, 2);
+ return noerror;
+}
+
+uint8_t RA8875::FT5206_TouchPositions(void) {
+ uint8_t valXH;
+ uint8_t valYH;
+
+ //INFO("FT5206_TouchPositions()");
+ numberOfTouchPoints = FT5206_ReadRegU8(FT5206_TD_STATUS) & 0xF;
+ //INFO(" numOfTouchPoints %d", numberOfTouchPoints);
+ gesture = FT5206_ReadRegU8(FT5206_GEST_ID);
+ //INFO(" gesture %d", gesture);
+
+ // If the switch statement was based only on numberOfTouchPoints, it would not
+ // be able to generate notification for 'release' events (as it is no longer touched).
+ // Therefore, forcing a 5, and it intentionally falls through each lower case.
+ switch (5) { // numberOfTouchPoints
+ case 5:
+ valXH = FT5206_ReadRegU8(FT5206_TOUCH5_XH);
+ valYH = FT5206_ReadRegU8(FT5206_TOUCH5_YH);
+ touchInfo[4].touchCode = FT5206_EventFlagToTouchCode[valXH >> 6];
+ touchInfo[4].touchID = (valYH >> 4);
+ touchInfo[4].coordinates.x = (valXH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH5_XL);
+ touchInfo[4].coordinates.y = (valYH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH5_YL);
+ if (touchInfo[4].touchCode)
+ INFO(" Touch[%d] code %d, id %2d, (%4d,%4d)",
+ 5,
+ touchInfo[4].touchCode,
+ touchInfo[4].touchID,
+ touchInfo[4].coordinates.x,
+ touchInfo[4].coordinates.y);
+ case 4:
+ valXH = FT5206_ReadRegU8(FT5206_TOUCH4_XH);
+ valYH = FT5206_ReadRegU8(FT5206_TOUCH4_YH);
+ touchInfo[3].touchCode = FT5206_EventFlagToTouchCode[valXH >> 6];
+ touchInfo[3].touchID = (valYH >> 4);
+ touchInfo[3].coordinates.x = (valXH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH4_XL);
+ touchInfo[3].coordinates.y = (valYH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH4_YL);
+ if (touchInfo[3].touchCode)
+ INFO(" Touch[%d] code %d, id %2d, (%4d,%4d)",
+ 4,
+ touchInfo[3].touchCode,
+ touchInfo[3].touchID,
+ touchInfo[3].coordinates.x,
+ touchInfo[3].coordinates.y);
+ case 3:
+ valXH = FT5206_ReadRegU8(FT5206_TOUCH3_XH);
+ valYH = FT5206_ReadRegU8(FT5206_TOUCH3_YH);
+ touchInfo[2].touchCode = FT5206_EventFlagToTouchCode[valXH >> 6];
+ touchInfo[2].touchID = (valYH >> 4);
+ touchInfo[2].coordinates.x = (valXH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH3_XL);
+ touchInfo[2].coordinates.y = (valYH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH3_YL);
+ if (touchInfo[2].touchCode)
+ INFO(" Touch[%d] code %d, id %2d, (%4d,%4d)",
+ 3,
+ touchInfo[2].touchCode,
+ touchInfo[2].touchID,
+ touchInfo[2].coordinates.x,
+ touchInfo[2].coordinates.y);
+ case 2:
+ valXH = FT5206_ReadRegU8(FT5206_TOUCH2_XH);
+ valYH = FT5206_ReadRegU8(FT5206_TOUCH2_YH);
+ touchInfo[1].touchCode = FT5206_EventFlagToTouchCode[valXH >> 6];
+ touchInfo[1].touchID = (valYH >> 4);
+ touchInfo[1].coordinates.x = (valXH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH2_XL);
+ touchInfo[1].coordinates.y = (valYH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH2_YL);
+ if (touchInfo[1].touchCode)
+ INFO(" Touch[%d] code %d, id %2d, (%4d,%4d)",
+ 2,
+ touchInfo[1].touchCode,
+ touchInfo[1].touchID,
+ touchInfo[1].coordinates.x,
+ touchInfo[1].coordinates.y);
+ case 1:
+ valXH = FT5206_ReadRegU8(FT5206_TOUCH1_XH);
+ valYH = FT5206_ReadRegU8(FT5206_TOUCH1_YH);
+ touchInfo[0].touchCode = FT5206_EventFlagToTouchCode[valXH >> 6];
+ touchInfo[0].touchID = (valYH >> 4);
+ touchInfo[0].coordinates.x = (valXH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH1_XL);
+ touchInfo[0].coordinates.y = (valYH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH1_YL);
+ if (touchInfo[0].touchCode)
+ INFO(" Touch[%d] code %d, id %2d, (%4d,%4d)",
+ 1,
+ touchInfo[0].touchCode,
+ touchInfo[0].touchID,
+ touchInfo[0].coordinates.x,
+ touchInfo[0].coordinates.y);
+ break;
+ default:
+ break;
+ }
+ return numberOfTouchPoints;
+}