51 Single-chip drive design of 1602 LCD display

This section focuses on the liquid crystal display 1602, the display content is "Hello, Welcome to my site, my friends.". Diagram is as follows: Procedures are as follows: #include #define uchar unsigned char #define uint unsigned int sbit RS = P3 ^ 0; // data / command selection terminal (H / L) sbit EN = P3 ^ 2; // Enable sbit RW = P3 ^ 1; // read / write selection terminal (H / L), This article write-only, so that the ports for low sbit wela = P3 ^ 3; // bit latch select signal uchar table1 [] = "Hello, Welcome to my"; // character table 1 uchar table2 [] = "site, my friends."; // character table 2 void delay (uint x) // delay function { uint a, b; for (a = x; a "0; a--) for (b = 10; b "0; b--); } void delay1 (uint x) // delay function { uint a, b; for (a = x; a "0; a--) for (b = 100; b "0; b--); } void write_com (uchar com) // write command function { wela = 1; // open latch position selected from P2 = com; // write command to the port P2 wela = 0; // Close the latch position selected from RS = 0; // The following section timing diagram with 1602, according to a written manual EN = 0; RW = 0; delay (10); EN = 1; delay (10); EN = 0; } void write_date (uchar date) // write data function { wela = 1; P2 = date; wela = 0; RS = 1; EN = 0; RW = 0; delay (10); EN = 1; delay (10); EN = 0; } void init () // initialization function { write_com (0x38); // display mode setting delay (20); write_com (0x0f); // display on / off and set the cursor delay (20); write_com (0x06); // When writing a character address pointer plus one, plus one cursor delay (20); } void main () // main function { uchar a; init (); write_com (0x80); // start address of a first row delay (20); for (a = 0; a "25; a ++) { write_date (table1 [a]); // read character table delay (20); } write_com (0xc0); // start address of the second row delay (20); for (a = 0; a "17; a ++) { write_date (table2 [a]); // read character table delay (20); } while (1); // kept displayed } The results are as follows:, Read more

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