serial_lcd.cpp

00001 #include "mbed.h"
00002 #include "serial_lcd.h"
00003 #include "pc_uart.h"
00004 
00005 I2C i2c1(I2C_SDA, I2C_SCL);         // I2C interface for LCD display
00006 DigitalOut LCD_RST(PB_10);          // LCD RST
00007 DigitalOut LCD_BL(PA_8);            // LCD BackLight
00008 
00009 #define NUM_USER_CHARS              2
00010 
00011 const char CGData[NUM_USER_CHARS][8] = {{0x0A,0x0A,0x00,0x0E,0x11,0x11,0x0E,0x00},
00012                                         {0x04,0x0E,0x0E,0x1F,0x1F,0x1F,0x04,0x00}};
00013 
00014 void write_ser_CGdata(void) {
00015     int i;
00016     
00017     write_ser_lcd(0x38, false);
00018     wait_us(30);
00019     write_ser_lcd(0x40, false);
00020     wait_us(30);
00021     for (i = 0; i < NUM_USER_CHARS; i++) {
00022         write_ser_text(CGData[i], 8);
00023     }
00024 }
00025 
00026 int write_ser_lcd(char data, bool mode) {
00027     char wd[2];
00028     int status;
00029 
00030     wd[0] = ((mode) ? 0x40 : 0x00);
00031     wd[1] = (char)data;
00032     status = i2c1.write(ST7032I_ADDR, wd, 2, false);
00033     return status;
00034 }
00035 
00036 void write_ser_text(const char* text, uint32_t len) {
00037     int i;
00038     char wd[41];
00039     int status;
00040 
00041     wd[0] = 0x40;
00042     for (i = 0; i < len; i++) {
00043         wd[i + 1] = text[i];
00044     }
00045     status = i2c1.write(ST7032I_ADDR, wd, len + 1, false);
00046     if (status != 0) {
00047         Error(0);
00048     }
00049 }
00050 
00051 int init_ser_lcd(void) {
00052     int status;
00053 
00054     LCD_RST = 0x0;                  // Generating Reset pulse
00055     LCD_BL = 0x0;                   // BackLight off
00056 //    BL_LCD = 0.0;
00057     wait_us(200);
00058     LCD_RST = 0x1;
00059     wait_ms(40);
00060     status = write_ser_lcd(0x38, false);     // Function set with IS = 0
00061     if (status != 0) {
00062         Error(0);
00063     }
00064     wait_us(30);
00065     status = write_ser_lcd(0x10, false);     // Cursor or display shift S/C = 0 - cursor
00066     if (status != 0) {
00067         Error(0);
00068     }
00069     wait_us(30);
00070     status = write_ser_lcd(0x39, false);     // Function set with IS = 1
00071     if (status != 0) {
00072         Error(0);
00073     }
00074     wait_us(30);
00075     status = write_ser_lcd(0x14, false);     // Internal OSC frequency adjustment
00076     if (status != 0) {
00077         Error(0);
00078     }
00079     wait_us(30);
00080     status = write_ser_lcd(0x79, false);     // Contrast set
00081     if (status != 0) {
00082         Error(0);
00083     }
00084     wait_us(30);
00085     status = write_ser_lcd(0x5C, false);     // Power/Icon/Contrast control
00086     if (status != 0) {
00087         Error(0);
00088     }
00089     wait_us(30);
00090     status = write_ser_lcd(0x6E, false);     // Follower control
00091     if (status != 0) {
00092         Error(0);
00093     }
00094     wait_ms(200);
00095 //    wait_us(30);
00096     status = write_ser_lcd(0x0C, false);     // Display ON
00097     if (status != 0) {
00098         Error(0);
00099     }
00100     wait_us(30);
00101     status = write_ser_lcd(0x01, false);     // Clear display
00102     if (status != 0) {
00103         Error(0);
00104     }
00105     wait_us(30);
00106     status = write_ser_lcd(0x06, false);     // Entry mode set
00107     if (status != 0) {
00108         Error(0);
00109     }
00110     wait_us(30);
00111     status = write_ser_lcd(0x02, false);     // Home
00112     if (status != 0) {
00113         Error(0);
00114     }
00115     wait_us(30);
00116     write_ser_CGdata();
00117     LCD_BL = 0x1;                   // BackLight ON
00118 //    BL_LCD = 0.5;
00119     return 0;
00120 }