Initial commit

solar_panel.X/lcd/lcd.c

@@ -0,0 +1,82 @@
+/*
+ * File:   lcd.c
+ * Author: pascal.sartoret
+ *
+ * Created on 16. d<>cembre 2020, 14:04
+ */
+
+#define _XTAL_FREQ 25000000L
+
+#include <xc.h>
+#include <string.h>
+#include "lcd.h"
+#include "ssd1963_cmd.h"
+
+
+
+int8_t Lcd_Init(void) 
+{
+        //--------------------------------------------------------------------------
+        // define GPIO for LCD
+        DIR_LCD_RS = 0;         // RS is an output
+        LCD_RS = 0;             // command mode
+        DIR_LCD_CS = 0;         // chip select is an output
+        LCD_CS = 0;             // do not select the LCD
+        LCD_DATA_L_DIR = LCD_DATA_L_DIR & 0x0F;  // data port is 4 bits output
+    
+        __delay_ms(200);  // power on delay
+        LCD_2x16_WriteCmd(0x02);
+        
+        LCD_2x16_WriteCmd(0x28);
+//        LCD_2x16_WriteCmd(0x2B);
+//        LCD_2x16_WriteCmd(0x2B);
+        LCD_2x16_WriteCmd(0x01);    // clear display 
+        LCD_2x16_WriteCmd(0x0C);
+//        LCD_2x16_WriteCmd(0x14);
+//        __delay_ms(2);
+        LCD_2x16_WriteCmd(0x06);
+//        __delay_ms(100);        
+        return 0;
+}
+
+
+void LCD_2x16_WriteCmd(uint8_t command)
+{
+    LCD_RS = 0;             // command mode
+    LCD_DATA_L = (command & 0xF0) | (LCD_DATA_L & 0x0F);   // bits to set
+    LCD_CS = 1;             // chip select
+    __delay_us(10);
+    LCD_CS = 0;             // chip deselect
+    __delay_us(1);
+    command = command << 4;
+    LCD_DATA_L = (command & 0xF0) | (LCD_DATA_L & 0x0F);   // bits to set
+    LCD_CS = 1;             // chip select
+    __delay_us(10);
+    LCD_CS = 0;             // chip deselect
+    __delay_ms(3);
+}
+void LCD_2x16_WriteData(uint8_t command)
+{
+    LCD_RS = 1;             // command mode
+    LCD_DATA_L = (command & 0xF0) | (LCD_DATA_L & 0x0F);   // bits to set
+    LCD_CS = 1;             // chip select
+    __delay_us(1);
+    LCD_CS = 0;             // chip deselect
+    __delay_us(1);
+    command = command << 4;
+    LCD_DATA_L = (command & 0xF0) | (LCD_DATA_L & 0x0F);   // bits to set
+    LCD_CS = 1;             // chip select
+    __delay_us(1);
+    LCD_CS = 0;             // chip deselect
+    __delay_us(100);
+}
+
+void LCD_2x16_WriteMsg(unsigned char * msg, uint8_t line)
+{
+    LCD_2x16_WriteCmd(0x80 | (line << 6));
+    do
+    {
+        LCD_2x16_WriteData(*msg);
+        msg++;
+    }while(*msg != 0);
+}