void lcdData(unsigned char cmd)
{
wait_ready();
CMD_RS1(); // data
lcdWriteData(cmd);
pulse_e();
}
void lcdCmd(unsigned char cmd)
{
wait_ready();
CMD_RS0(); // controll command
lcdWriteData(cmd);
pulse_e();
}
void lcdInit(void)
{
_lcd_init();
lcdPrepareWrite();
CMD_SLEEP_MS(16); // 16 ms
lcdWriteData(3); // 8bit mode
pulse_e();
CMD_SLEEP_MS(5); // 4992 us
pulse_e(); // Repeat 8bit mode
CMD_SLEEP_MS(1); // 64 us
pulse_e(); // Third repeat
CMD_SLEEP_MS(1); // 64 us
// lcdWriteData(2); // Change to 4bit mode (0x20)
// pulse_e();
lcdCmd(LCD_CMD_INIT8);
/*
lcdCmd(0x24);
lcdCmd(0x09);
lcdCmd(0x20);
*/
lcdCmd(0x08);
lcdCmd(0x01);
lcdCmd(0x06);
lcdCmd(0x0C);
lcdCmd(0x80);
/*
lcdCmd(0x02);
*/
/*
lcdCmd(LCD_SET_DM | LCD_DM_DISPLAY_ON);
lcdCmd(LCD_SET_INCREMENT_MODE);
*/
#ifdef WRAPEN
cur_col = 0;
cur_row = 0;
#endif
}
uint8_t read_register(bool register_sel) {
uint8_t data = 0;
uint8_t upper4 = 0;
uint8_t lower4 = 0;
if(register_sel) set_rs();
else clear_rs();
set_rw();
config_bus_input();
upper4 = pulse_e();
lower4 = pulse_e();
data |= upper4;
data |= (lower4 >> 4);
return data;
}
// Send one byte as command to display,
// split in two parts for 4bit interface
void lcd_send_cmd(int cmd_value) {
GPIO_ResetBits(LCD_GPIO, LCD_RS | LCD_RW);
GPIO_ResetBits(LCD_GPIO, LCD_D7 | LCD_D6 | LCD_D5 | LCD_D4);
// Send first half
if (cmd_value & (1<<7)) GPIO_SetBits(LCD_GPIO, LCD_D7);
if (cmd_value & (1<<6)) GPIO_SetBits(LCD_GPIO, LCD_D6);
if (cmd_value & (1<<5)) GPIO_SetBits(LCD_GPIO, LCD_D5);
if (cmd_value & (1<<4)) GPIO_SetBits(LCD_GPIO, LCD_D4);
pulse_e();
// Send second half
GPIO_ResetBits(LCD_GPIO, LCD_D7 | LCD_D6 | LCD_D5 | LCD_D4);
if (cmd_value & (1<<3)) GPIO_SetBits(LCD_GPIO, LCD_D7);
if (cmd_value & (1<<2)) GPIO_SetBits(LCD_GPIO, LCD_D6);
if (cmd_value & (1<<1)) GPIO_SetBits(LCD_GPIO, LCD_D5);
if (cmd_value & (1<<0)) GPIO_SetBits(LCD_GPIO, LCD_D4);
pulse_e();
}
static void output_nibble(uint8_t data) {
bool db7 = data & (1 << 7);
bool db6 = data & (1 << 6);
bool db5 = data & (1 << 5);
bool db4 = data & (1 << 4);
if(db7) set_db7();
else clear_db7();
if(db6) set_db6();
else clear_db6();
if(db5) set_db5();
else clear_db5();
if(db4) set_db4();
else clear_db4();
pulse_e();
}
// Init Routine
// http://sprut.de/electronic/lcd/
// Pinout:
// RS RW - D7 D6 D5 D5 (D3 D2 D1 D0)
void lcd_start() {
// Wait 15ms
wait_ms(15);
// Set interface to 8 Bits
GPIO_ResetBits(LCD_GPIO, LCD_RS | LCD_RW | LCD_D7 | LCD_D6);
GPIO_SetBits(LCD_GPIO, LCD_D5 | LCD_D4);
pulse_e(); // 00-0011
// Wait 4.1ms
wait_ms(5);
// Pulse again (Set interface to 8 Bits)
pulse_e();
// Wait 100us and pulse again
wait_ms(1);
pulse_e();
// Set interface to 4 Bits
GPIO_ResetBits(LCD_GPIO, LCD_D4);
pulse_e(); // 00-0010
// From now on, send bytes in two parts
// First: 7 6 5 4
// Second: 3 2 1 0
// 2 lines, 5x8
pulse_e(); // 00-0010....
GPIO_ResetBits(LCD_GPIO, LCD_D5);
GPIO_SetBits(LCD_GPIO, LCD_D7);
pulse_e(); // + ....1000
// Display off
GPIO_ResetBits(LCD_GPIO, LCD_D7);
pulse_e();
GPIO_SetBits(LCD_GPIO, LCD_D7);
pulse_e();
// Clear
GPIO_ResetBits(LCD_GPIO, LCD_D7);
pulse_e();
GPIO_SetBits(LCD_GPIO, LCD_D4);
pulse_e();
// Cursor right, no display shift
GPIO_ResetBits(LCD_GPIO, LCD_D4);
pulse_e();
GPIO_SetBits(LCD_GPIO, LCD_D6 | LCD_D5);
pulse_e();
// Display on
GPIO_ResetBits(LCD_GPIO, LCD_D6 | LCD_D5);
pulse_e();
// To enable cursor: Add LCD_D5 | LCD_D4
GPIO_SetBits(LCD_GPIO, LCD_D7 | LCD_D6);
pulse_e();
}
