initial ESP-IDF project

Signed-off-by: Peter Siegmund <peter@rdkr.com>

ePaper-ESP-IDF/components/lilygo-epd47/touch.cpp

@@ -0,0 +1,115 @@
+#ifdef ARDUINO
+
+#include "touch.h"
+
+bool TouchClass::begin(TwoWire &port, uint8_t addr)
+{
+    _i2cPort = &port;
+    _address = addr;
+    _i2cPort->beginTransmission(_address);
+    if (0 == _i2cPort->endTransmission()) {
+        wakeup();
+        return true;
+    }
+    return false;
+}
+
+void TouchClass::readBytes(uint8_t *data, uint8_t nbytes)
+{
+    _i2cPort->beginTransmission(_address);  // Initialize the Tx buffer
+    _i2cPort->write(data, 2);                // Put data in Tx buffer
+    if (0 != _i2cPort->endTransmission()) {
+        Serial.println("readBytes error!");
+    }
+    uint8_t i = 0;
+    _i2cPort->requestFrom(_address, nbytes);  // Read bytes from slave register address
+    while (_i2cPort->available()) {
+        data[i++] = _i2cPort->read();
+    }
+}
+
+void TouchClass::clearFlags(void)
+{
+    uint8_t buf[3] = {0xD0, 0X00, 0XAB};
+    _i2cPort->beginTransmission(_address);
+    _i2cPort->write(buf, 3);
+    _i2cPort->endTransmission();
+}
+
+uint8_t TouchClass::scanPoint()
+{
+    uint8_t point = 0;
+    uint8_t buffer[40] = {0};
+
+    buffer[0] = 0xD0;
+    buffer[1] = 0x00;
+    readBytes(buffer, 7);
+
+    if (buffer[0] == 0xAB) {
+        clearFlags();
+        return 0;
+    }
+
+    point = buffer[5] & 0xF;
+
+    if (point == 1) {
+        buffer[5] = 0xD0;
+        buffer[6] = 0x07;
+        readBytes( &buffer[5], 2);
+
+    } else if (point > 1) {
+        buffer[5] = 0xD0;
+        buffer[6] = 0x07;
+        readBytes( &buffer[5], 5 * (point - 1) + 3);
+    }
+    clearFlags();
+
+    if (point) {
+        for (int i = 0; i < point; ++i) {
+            data[i].id =  (buffer[i * 5] >> 4) & 0x0F;
+            data[i].state = buffer[i * 5] & 0x0F;
+            if (data[i].state == 0x06) {
+                data[i].state = 0x07;
+            } else {
+                data[i].state = 0x06;
+            }
+            data[i].y = (uint16_t)((buffer[i * 5 + 1] << 4) | ((buffer[i * 5 + 3] >> 4) & 0x0F));
+            data[i].x = (uint16_t)((buffer[i * 5 + 2] << 4) | (buffer[i * 5 + 3] & 0x0F));
+        }
+    } else {
+        point = 1;
+        data[0].id = (buffer[0] >> 4) & 0x0F;
+        data[0].state = 0x06;
+        data[0].y = (uint16_t)((buffer[0 * 5 + 1] << 4) | ((buffer[0 * 5 + 3] >> 4) & 0x0F));
+        data[0].x = (uint16_t)((buffer[0 * 5 + 2] << 4) | (buffer[0 * 5 + 3] & 0x0F));
+    }
+    // Serial.printf("X:%d Y:%d\n", data[0].x, data[0].y);
+    return point;
+}
+
+
+void TouchClass::getPoint(uint16_t &x, uint16_t &y, uint8_t index)
+{
+    if (index >= 4)return;
+    x = data[index].x;
+    y = data[index].y;
+}
+
+
+void TouchClass::sleep(void)
+{
+    uint8_t buf[2] = {0xD1, 0X05};
+    _i2cPort->beginTransmission(_address);
+    _i2cPort->write(buf, 2);
+    _i2cPort->endTransmission();
+}
+
+void TouchClass::wakeup(void)
+{
+    uint8_t buf[2] = {0xD1, 0X06};
+    _i2cPort->beginTransmission(_address);
+    _i2cPort->write(buf, 2);
+    _i2cPort->endTransmission();
+}
+
+#endif