David Smart / RA8875 Featured

Library to control a Graphics TFT connected to 4-wire SPI - revised for the Raio RA8875 Display Controller.

Dependents:   FRDM_RA8875_mPaint RA8875_Demo RA8875_KeyPadDemo SignalGenerator ... more

Fork of SPI_TFT by Peter Drescher

See Components - RA8875 Based Display

Enhanced touch-screen support - where it previous supported both the Resistive Touch and Capacitive Touch based on the FT5206 Touch Controller, now it also has support for the GSL1680 Touch Controller.

Offline Help Manual (Windows chm)

/media/uploads/WiredHome/ra8875.zip.bin (download, rename to .zip and unzip)

RA8875_Touch_FT5206.cpp@165:695c24cc5197, 2019-02-24 (annotated)

Committer:
WiredHome
Date:
Sun Feb 24 00:40:00 2019 +0000
Revision:
165:695c24cc5197
Child:
166:53fd4a876dac
Initial refactoring to add support for another Cap Sense touch controller - based on the GSL1680.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
WiredHome 165:695c24cc5197 1
WiredHome 165:695c24cc5197 2
WiredHome 165:695c24cc5197 3 #include "RA8875.h"
WiredHome 165:695c24cc5197 4
WiredHome 165:695c24cc5197 5 //#define DEBUG "RAFT" // RA8875 FT5206
WiredHome 165:695c24cc5197 6 // ...
WiredHome 165:695c24cc5197 7 // INFO("Stuff to show %d", var); // new-line is automatically appended
WiredHome 165:695c24cc5197 8 //
WiredHome 165:695c24cc5197 9 #if (defined(DEBUG) && !defined(TARGET_LPC11U24))
WiredHome 165:695c24cc5197 10 #define INFO(x, ...) std::printf("[INF %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
WiredHome 165:695c24cc5197 11 #define WARN(x, ...) std::printf("[WRN %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
WiredHome 165:695c24cc5197 12 #define ERR(x, ...) std::printf("[ERR %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
WiredHome 165:695c24cc5197 13 static void HexDump(const char * title, const uint8_t * p, int count)
WiredHome 165:695c24cc5197 14 {
WiredHome 165:695c24cc5197 15 int i;
WiredHome 165:695c24cc5197 16 char buf[100] = "0000: ";
WiredHome 165:695c24cc5197 17
WiredHome 165:695c24cc5197 18 if (*title)
WiredHome 165:695c24cc5197 19 INFO("%s", title);
WiredHome 165:695c24cc5197 20 for (i=0; i<count; ) {
WiredHome 165:695c24cc5197 21 sprintf(buf + strlen(buf), "%02X ", *(p+i));
WiredHome 165:695c24cc5197 22 if ((++i & 0x0F) == 0x00) {
WiredHome 165:695c24cc5197 23 INFO("%s", buf);
WiredHome 165:695c24cc5197 24 if (i < count)
WiredHome 165:695c24cc5197 25 sprintf(buf, "%04X: ", i);
WiredHome 165:695c24cc5197 26 else
WiredHome 165:695c24cc5197 27 buf[0] = '\0';
WiredHome 165:695c24cc5197 28 }
WiredHome 165:695c24cc5197 29 }
WiredHome 165:695c24cc5197 30 if (strlen(buf))
WiredHome 165:695c24cc5197 31 INFO("%s", buf);
WiredHome 165:695c24cc5197 32 }
WiredHome 165:695c24cc5197 33 #else
WiredHome 165:695c24cc5197 34 #define INFO(x, ...)
WiredHome 165:695c24cc5197 35 #define WARN(x, ...)
WiredHome 165:695c24cc5197 36 #define ERR(x, ...)
WiredHome 165:695c24cc5197 37 #define HexDump(a, b, c)
WiredHome 165:695c24cc5197 38 #endif
WiredHome 165:695c24cc5197 39
WiredHome 165:695c24cc5197 40
WiredHome 165:695c24cc5197 41
WiredHome 165:695c24cc5197 42 // Translate from FT5206 Event Flag to Touch Code to API-match the
WiredHome 165:695c24cc5197 43 // alternate resistive touch screen driver common in the RA8875
WiredHome 165:695c24cc5197 44 // displays.
WiredHome 165:695c24cc5197 45 static const TouchCode_t FT5206_EventFlagToTouchCode[4] = {
WiredHome 165:695c24cc5197 46 touch, // 00b Put Down
WiredHome 165:695c24cc5197 47 release, // 01b Put Up
WiredHome 165:695c24cc5197 48 held, // 10b Contact
WiredHome 165:695c24cc5197 49 no_touch // 11b Reserved
WiredHome 165:695c24cc5197 50 };
WiredHome 165:695c24cc5197 51
WiredHome 165:695c24cc5197 52
WiredHome 165:695c24cc5197 53 RetCode_t RA8875::FT5206_Init() {
WiredHome 165:695c24cc5197 54 char data[2] = {FT5206_DEVICE_MODE, 0};
WiredHome 165:695c24cc5197 55
WiredHome 165:695c24cc5197 56 m_i2c->write(m_addr, data, 2);
WiredHome 165:695c24cc5197 57 return noerror;
WiredHome 165:695c24cc5197 58 }
WiredHome 165:695c24cc5197 59
WiredHome 165:695c24cc5197 60 uint8_t RA8875::FT5206_TouchPositions(void) {
WiredHome 165:695c24cc5197 61 uint8_t valXH;
WiredHome 165:695c24cc5197 62 uint8_t valYH;
WiredHome 165:695c24cc5197 63
WiredHome 165:695c24cc5197 64 //INFO("FT5206_TouchPositions()");
WiredHome 165:695c24cc5197 65 numberOfTouchPoints = FT5206_ReadRegU8(FT5206_TD_STATUS) & 0xF;
WiredHome 165:695c24cc5197 66 //INFO(" numOfTouchPoints %d", numberOfTouchPoints);
WiredHome 165:695c24cc5197 67 gesture = FT5206_ReadRegU8(FT5206_GEST_ID);
WiredHome 165:695c24cc5197 68 //INFO(" gesture %d", gesture);
WiredHome 165:695c24cc5197 69
WiredHome 165:695c24cc5197 70 // If the switch statement was based only on numberOfTouchPoints, it would not
WiredHome 165:695c24cc5197 71 // be able to generate notification for 'release' events (as it is no longer touched).
WiredHome 165:695c24cc5197 72 // Therefore, forcing a 5, and it intentionally falls through each lower case.
WiredHome 165:695c24cc5197 73 switch (5) { // numberOfTouchPoints
WiredHome 165:695c24cc5197 74 case 5:
WiredHome 165:695c24cc5197 75 valXH = FT5206_ReadRegU8(FT5206_TOUCH5_XH);
WiredHome 165:695c24cc5197 76 valYH = FT5206_ReadRegU8(FT5206_TOUCH5_YH);
WiredHome 165:695c24cc5197 77 touchInfo[4].touchCode = FT5206_EventFlagToTouchCode[valXH >> 6];
WiredHome 165:695c24cc5197 78 touchInfo[4].touchID = (valYH >> 4);
WiredHome 165:695c24cc5197 79 touchInfo[4].coordinates.x = (valXH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH5_XL);
WiredHome 165:695c24cc5197 80 touchInfo[4].coordinates.y = (valYH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH5_YL);
WiredHome 165:695c24cc5197 81 if (touchInfo[4].touchCode)
WiredHome 165:695c24cc5197 82 INFO(" Touch[%d] code %d, id %2d, (%4d,%4d)",
WiredHome 165:695c24cc5197 83 5,
WiredHome 165:695c24cc5197 84 touchInfo[4].touchCode,
WiredHome 165:695c24cc5197 85 touchInfo[4].touchID,
WiredHome 165:695c24cc5197 86 touchInfo[4].coordinates.x,
WiredHome 165:695c24cc5197 87 touchInfo[4].coordinates.y);
WiredHome 165:695c24cc5197 88 case 4:
WiredHome 165:695c24cc5197 89 valXH = FT5206_ReadRegU8(FT5206_TOUCH4_XH);
WiredHome 165:695c24cc5197 90 valYH = FT5206_ReadRegU8(FT5206_TOUCH4_YH);
WiredHome 165:695c24cc5197 91 touchInfo[3].touchCode = FT5206_EventFlagToTouchCode[valXH >> 6];
WiredHome 165:695c24cc5197 92 touchInfo[3].touchID = (valYH >> 4);
WiredHome 165:695c24cc5197 93 touchInfo[3].coordinates.x = (valXH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH4_XL);
WiredHome 165:695c24cc5197 94 touchInfo[3].coordinates.y = (valYH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH4_YL);
WiredHome 165:695c24cc5197 95 if (touchInfo[3].touchCode)
WiredHome 165:695c24cc5197 96 INFO(" Touch[%d] code %d, id %2d, (%4d,%4d)",
WiredHome 165:695c24cc5197 97 4,
WiredHome 165:695c24cc5197 98 touchInfo[3].touchCode,
WiredHome 165:695c24cc5197 99 touchInfo[3].touchID,
WiredHome 165:695c24cc5197 100 touchInfo[3].coordinates.x,
WiredHome 165:695c24cc5197 101 touchInfo[3].coordinates.y);
WiredHome 165:695c24cc5197 102 case 3:
WiredHome 165:695c24cc5197 103 valXH = FT5206_ReadRegU8(FT5206_TOUCH3_XH);
WiredHome 165:695c24cc5197 104 valYH = FT5206_ReadRegU8(FT5206_TOUCH3_YH);
WiredHome 165:695c24cc5197 105 touchInfo[2].touchCode = FT5206_EventFlagToTouchCode[valXH >> 6];
WiredHome 165:695c24cc5197 106 touchInfo[2].touchID = (valYH >> 4);
WiredHome 165:695c24cc5197 107 touchInfo[2].coordinates.x = (valXH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH3_XL);
WiredHome 165:695c24cc5197 108 touchInfo[2].coordinates.y = (valYH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH3_YL);
WiredHome 165:695c24cc5197 109 if (touchInfo[2].touchCode)
WiredHome 165:695c24cc5197 110 INFO(" Touch[%d] code %d, id %2d, (%4d,%4d)",
WiredHome 165:695c24cc5197 111 3,
WiredHome 165:695c24cc5197 112 touchInfo[2].touchCode,
WiredHome 165:695c24cc5197 113 touchInfo[2].touchID,
WiredHome 165:695c24cc5197 114 touchInfo[2].coordinates.x,
WiredHome 165:695c24cc5197 115 touchInfo[2].coordinates.y);
WiredHome 165:695c24cc5197 116 case 2:
WiredHome 165:695c24cc5197 117 valXH = FT5206_ReadRegU8(FT5206_TOUCH2_XH);
WiredHome 165:695c24cc5197 118 valYH = FT5206_ReadRegU8(FT5206_TOUCH2_YH);
WiredHome 165:695c24cc5197 119 touchInfo[1].touchCode = FT5206_EventFlagToTouchCode[valXH >> 6];
WiredHome 165:695c24cc5197 120 touchInfo[1].touchID = (valYH >> 4);
WiredHome 165:695c24cc5197 121 touchInfo[1].coordinates.x = (valXH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH2_XL);
WiredHome 165:695c24cc5197 122 touchInfo[1].coordinates.y = (valYH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH2_YL);
WiredHome 165:695c24cc5197 123 if (touchInfo[1].touchCode)
WiredHome 165:695c24cc5197 124 INFO(" Touch[%d] code %d, id %2d, (%4d,%4d)",
WiredHome 165:695c24cc5197 125 2,
WiredHome 165:695c24cc5197 126 touchInfo[1].touchCode,
WiredHome 165:695c24cc5197 127 touchInfo[1].touchID,
WiredHome 165:695c24cc5197 128 touchInfo[1].coordinates.x,
WiredHome 165:695c24cc5197 129 touchInfo[1].coordinates.y);
WiredHome 165:695c24cc5197 130 case 1:
WiredHome 165:695c24cc5197 131 valXH = FT5206_ReadRegU8(FT5206_TOUCH1_XH);
WiredHome 165:695c24cc5197 132 valYH = FT5206_ReadRegU8(FT5206_TOUCH1_YH);
WiredHome 165:695c24cc5197 133 touchInfo[0].touchCode = FT5206_EventFlagToTouchCode[valXH >> 6];
WiredHome 165:695c24cc5197 134 touchInfo[0].touchID = (valYH >> 4);
WiredHome 165:695c24cc5197 135 touchInfo[0].coordinates.x = (valXH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH1_XL);
WiredHome 165:695c24cc5197 136 touchInfo[0].coordinates.y = (valYH & 0x0f)*256 + FT5206_ReadRegU8(FT5206_TOUCH1_YL);
WiredHome 165:695c24cc5197 137 if (touchInfo[0].touchCode)
WiredHome 165:695c24cc5197 138 INFO(" Touch[%d] code %d, id %2d, (%4d,%4d)",
WiredHome 165:695c24cc5197 139 1,
WiredHome 165:695c24cc5197 140 touchInfo[0].touchCode,
WiredHome 165:695c24cc5197 141 touchInfo[0].touchID,
WiredHome 165:695c24cc5197 142 touchInfo[0].coordinates.x,
WiredHome 165:695c24cc5197 143 touchInfo[0].coordinates.y);
WiredHome 165:695c24cc5197 144 break;
WiredHome 165:695c24cc5197 145 default:
WiredHome 165:695c24cc5197 146 break;
WiredHome 165:695c24cc5197 147 }
WiredHome 165:695c24cc5197 148 return numberOfTouchPoints;
WiredHome 165:695c24cc5197 149 }