2020-09-03

Arduino/epd7in5bc/epd7in5b.cpp

@@ -62,7 +62,7 @@ int Epd::Init(void) {
     WaitUntilIdle();
 
     SendCommand(PLL_CONTROL);
-    SendData(0x3c);        
+    SendData(0x3A);        
 
     SendCommand(TEMPERATURE_CALIBRATION);
     SendData(0x00);
@@ -163,6 +163,64 @@ void Epd::DisplayFrame(const unsigned char** image_data) {
     WaitUntilIdle();
 }
 
+void Epd::Clean(void) {
+    SendCommand(DATA_START_TRANSMISSION_1);
+    for (long i = 0; i < 122880; i++) {    
+        SendData(0x33); 
+    }
+    SendCommand(DISPLAY_REFRESH);
+    DelayMs(100);
+    WaitUntilIdle();
+}
+
+void Epd::DisplayOneQuarterFrame(const unsigned char* image_data) {
+    unsigned char temp1, temp2;
+    SendCommand(DATA_START_TRANSMISSION_1);
+
+
+	for (long i = 0; i < 192; i++) {   
+			for (long k = 0; k < 80; k++) {
+				temp1 = pgm_read_byte(image_data + i*80 + k);
+				for (unsigned char j = 0; j < 4; j++) {
+					if ((temp1 & 0xC0) == 0xC0) {
+						temp2 = 0x03;                       // white
+					} else if ((temp1 & 0xC0) == 0x00) {
+						temp2 = 0x00;                       // black
+					} else {
+						temp2 = 0x04;                       // red
+					}
+					temp2 <<= 4;
+					temp1 <<= 2;
+					j++;
+					if((temp1 & 0xC0) == 0xC0) {
+						temp2 |= 0x03;                      // white
+					} else if ((temp1 & 0xC0) == 0x00) {
+						temp2 |= 0x00;                      // black
+					} else {
+						temp2 |= 0x04;                      // red
+					}
+					temp1 <<= 2;
+					SendData(temp2); 
+				}
+			}
+			for (long k = 0; k < 160; k++) {                // 1/4 show white
+				SendData(0x33); 
+			}
+		
+	}
+	for (long i = 0; i < 192; i++) {                    
+			for (long k = 0; k < 160; k++) {                 // 1/4 show red 
+				SendData(0x44); 
+			}
+			for (long k = 0; k < 160; k++) {                 // 1/4 show black 
+				SendData(0x00); 
+			}
+	}
+    SendCommand(DISPLAY_REFRESH);
+    DelayMs(100);
+    WaitUntilIdle();
+}
+
 /**
  *  @brief: After this command is transmitted, the chip would enter the 
  *          deep-sleep mode to save power. 

Arduino/epd7in5bc/epd7in5b.h

@@ -83,6 +83,8 @@ public:
     void WaitUntilIdle(void);
     void Reset(void);
     void DisplayFrame(const unsigned char** image_data);
+	void DisplayOneQuarterFrame(const unsigned char* image_data);
+	void Epd::Clean(void);
     void SendCommand(unsigned char command);
     void SendData(unsigned char data);
     void Sleep(void);

Arduino/epd7in5bc/epd7in5bc.ino

@@ -36,7 +36,8 @@ void setup() {
         Serial.print("e-Paper init failed");
         return;
     }
-    epd.DisplayFrame(IMAGE_DATA);
+    //epd.Clean();
+    epd.DisplayOneQuarterFrame(IMAGE_DATA);
 }
 
 void loop() {

Arduino/epd7in5bc/epdif.cpp

@@ -26,7 +26,7 @@
  */
 
 #include "epdif.h"
-#include <SPI.h>
+#include <spi.h>
 
 EpdIf::EpdIf() {
 };
@@ -56,9 +56,11 @@ int EpdIf::IfInit(void) {
     pinMode(CS_PIN, OUTPUT);
     pinMode(RST_PIN, OUTPUT);
     pinMode(DC_PIN, OUTPUT);
-    pinMode(BUSY_PIN, INPUT); 
+    pinMode(BUSY_PIN, INPUT);     
+    
     SPI.begin();
     SPI.beginTransaction(SPISettings(2000000, MSBFIRST, SPI_MODE0));
+
     return 0;
 }
 

Arduino/epd7in5bc/epdif.h

@@ -28,7 +28,7 @@
 #ifndef EPDIF_H
 #define EPDIF_H
 
-#include <Arduino.h>
+#include <arduino.h>
 
 // Pin definition
 #define RST_PIN         8

Arduino/epd7in5bc/imagedata.h

@@ -22,9 +22,7 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
-extern const unsigned char *IMAGE_DATA[2];
-extern const unsigned char IMAGE_DATA_1[];
-extern const unsigned char IMAGE_DATA_2[];
+extern const unsigned char IMAGE_DATA[];
 /* FILE END */