Send a self-written 2440 drive 1602 data (circuit + code)

The surplus data line on the mini2440 board was introduced last week. Looking at the previous 1602 drop, suddenly I wanted to use arm9-to drive it, so I started to do it. The Code was changed from the time when I first learned C51. Haha, I think it is really bad to see the code I wrote before. Now I have finished it. Although it is a bit cool, it really takes a lot of effort to drive it. It would be nice to wear pants ^_^ Driver: 2440 + hc595 + lcd1602 Circuit diagram: Circuit Diagram (original file name: 1602.jpg) Family Family photo (original file name: moto_0009.jpg) Lcd1602.h header file content # Ifndef _ lcd1602_h __ # DEFINE _ lcd1602_h __ # Include "./include/gpio. H" # Include "./include/DEF. H" # Include "./include/Timer. H" // ------- Driver method -----------// # Define io_way 0 // simulate Io # Define spi_way 1 // SPI # Define lcdctl_way spi_way // use the SPI driver // ------- Control port and control pin ------// # Define lcd1602_ctl_port rgpfcon // GPF Port # Define lcd1602_rs gpfpin0 // Rs pin # Define lcd1602_rw gpfpin2 // RW pin # Define lcd1602_e gpfpin4 // en pin // ------- Data port and data pin ------ // (74hc595 is used) # Define lcd1602_data_port rgpgcon // GPG Port # Define hc595_st gpgpin5 // spi1miso pin # Define hc595_sh gpgpin7 // spi1clk pin # Define hc595_ds gpgpin6 // spi1mosi pin # Define spi1baud 300000 // set the baud rate to 300 kHz (pclk = 50666666) // -------- Homemade character --------- # Define self_symbol 1 // enable self-made character display # If self_symbol Extern const u8 cgtab [8] [8]; # Endif // ----- Latency function ----------// # Define delay_ms (x) timerdelay (1000 * X) # Define delay_us (x) timerdelay (1 * X) // --------- Main function ----------// Void lcd1602_init (void); // 1602 initialization (with clear screen) Void lcd1602_clear (void); // clear screen 1602 Void lcd1602_putchar (u8 number); // display characters Void lcd1602_putcharxy (u8 number, u8 X, u8 y); // display characters at a specified position Void lcd1602_putstring (u8 * P); // display string Void lcd1602_putstringxy (u8 * P, u8 X, u8 y); // display the string at the specified position # If self_symbol Void lcd1602writeram (u8 * data, u8 tab_n ); # Endif // --------- Subfunction ----------// Void lcd1602pin_init (void ); # If lcdctl_way = spi_way Void spi1senddata (u8 data ); # Else Void hc595senddata (u8 data ); # Endif Void lcd1602writecmd (u8 cmd ); Void lcd1602writedata (u8 w_data ); Void lcd1602setpoint (u8 X, u8 y ); # Endif // _ lcd1602_h __ Code and rationale fig ourdev_513387.rar (file size: 298 K) (original file name: up.rar)

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