uint8_t lcd_write(unsigned char chr, enum lcd_rs_t rs, uint8_t timeout) {
unsigned char status;
do {
status = lcd_status();
} while(lcd_is_busy(status) && timeout--);
if(lcd_is_busy(status)) {
lcd_info_set_write_timeout();
return 0;
}
lcd_tris_set(0x00);
lcd_en_pin = LCD_EN_LOW;
lcd_rs_pin = rs;
lcd_rw_pin = LCD_RW_WRITE;
lcd_send_nibble(chr >> 4);
lcd_send_nibble(chr);
return 1;
}
/**
* @brief Sends a single symbol to the display.
* @details This will send a symbol to the current DDRAM address on the display controller
* and automatically increment the display cursor.
*
* @param symbol The symbol to be printed.
*/
void lcd_send_symbol(char symbol) {
while (lcd_is_busy())
_delay_ms(1);
PORTB |= 1 << 0;
PORTA = symbol;
PORTB |= 1 << 2;
_delay_us(50); // lcd controller execution time
PORTB &= ~(1 << 2);
}
void scroll_screen(char c){
uint8_t offset;
for (offset=0;offset<8;offset++) {
scroll_line(c,offset);
if (!(offset%2)) {
while (lcd_is_busy());
lcd_dma_start();
}
// delay_ms(150);
}
}
/**
* @brief Sends a command to the display controller.
*
* @param cmd The command code to be sent.
*/
void lcd_send_command(char cmd) {
while (lcd_is_busy())
_delay_ms(1);
PORTB &= ~(1 << 0);
PORTA = cmd;
PORTB |= 1 << 2;
if (cmd == 0b01 || cmd == 0b10) // if clear or return home instruction
_delay_ms(1.5); // then execution time is longer
else
_delay_us(50);
PORTB &= ~(1 << 2);
}
int main(void)
{
uint32_t x = 0;
uint32_t y = 0;
RCC_DeInit();
RCC_HSEConfig(RCC_HSE_ON);
if(RCC_WaitForHSEStartUp() == SUCCESS)
{
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_PCLKConfig(RCC_HCLK_Div1);
RCC_PLLConfig(RCC_PLLSource_PREDIV1, RCC_PLLMul_8);
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08);
}
generator_init();
generator_start();
delay_init();
lcd_init();
lcd_clear();
lcd_dma_start();
for (x=0;x<50;x++) {
while (lcd_is_busy());
lcd_noise();
lcd_dma_start();
}
while (lcd_is_busy());
for (x=0;x<patternWidthPages*patternHeightPixels;x++)
lcd_buf[x] = patternBitmaps[x];
print(1,0,"PLEASE",6);
print(0,7,"STAND_BY",8);
while (lcd_is_busy());
lcd_dma_start();
delay_ms(20000);
for (x=0;x<patternWidthPages*patternHeightPixels;x++)
lcd_buf[x] = patternBitmaps[x];
for (x=9;x>0;x--) {
putchar_big(3,3,'0'+x);
while (lcd_is_busy());
lcd_dma_start();
delay_ms(3000);
}
lcd_clear();
print(1,1,"URGENT",6);
print(0,6,"MESSAGE!",8);
while (lcd_is_busy());
lcd_dma_start();
delay_ms(3000);
scroll_text(MESSAGE);
delay_ms(3000);
lcd_clear();
print(1,1,"THAT'S",6);
print(3,3,"ALL",3);
print(1,5,"FOLKS!",6);
while (lcd_is_busy());
lcd_dma_start();
delay_ms(100000);
for (x=0;x<10000;x++) {
while (lcd_is_busy());
lcd_noise();
lcd_dma_start();
}
lcd_clear();
while (lcd_is_busy());
lcd_dma_start();
scroll_text(SECRET_MESSAGE);
while(1) //Infinite loop!
{
while (lcd_is_busy());
lcd_noise();
lcd_dma_start();
}
}