Пример #1
0
void glcd_init(void)
{
	
#if defined(GLCD_CONTROLLER_PCD8544)

	/* Set pin directions */
	
	/*
	 * Set up SPI for AVR8
	 * Note: AVR's SS pin must be set to output, regardless of whether we
	 * actually use it. This is a requirement of SPI mster mode.
	 */
	sbi(DDR(AVR_SS_PORT),AVR_SS_PIN);
	
	/*
	 *  Set MOSI, Master SS, SCK to output (otherwise SPI won't work)
	 *  Must be done even if native SS pin not used
	 */
	sbi(DDR(CONTROLLER_MOSI_PORT),CONTROLLER_MOSI_PIN);
	sbi(DDR(CONTROLLER_SS_PORT),CONTROLLER_SS_PIN);
	sbi(DDR(CONTROLLER_SCK_PORT),CONTROLLER_SCK_PIN);
		
	/* Set SS, DC and RST pins to output */
	sbi( DDR(CONTROLLER_SS_PORT), CONTROLLER_SS_PIN );
	sbi( DDR(CONTROLLER_DC_PORT), CONTROLLER_DC_PIN );
	sbi( DDR(CONTROLLER_RST_PORT), CONTROLLER_RST_PIN );
	
	/* Deselect LCD */
	GLCD_DESELECT();

	/*
	 * Max allowed SPI clock is 4 MHz from datasheet.
	 * Enable SPI, set master mode and clock rate to /4 (4MHz with F_CPU=8MHz)
	 */
	SPCR = (1<<SPE)|(1<<MSTR);
	SPSR = 0;
	
	glcd_PCD8544_init();

	/* Select screen buffer */
	glcd_select_screen(glcd_buffer,&glcd_bbox);
	
	/* Clear screen, we are now ready to go */
	
	glcd_clear();

#elif defined(GLCD_CONTROLLER_ST7565R)

	/* Set up GPIO directions */
	
	/*
	 * Set up SPI for AVR8
	 * Note: AVR's SS pin must be set to output, regardless of whether we
	 * actually use it. This is a requirement of SPI mster mode.
	 */
	sbi(DDR(AVR_SS_PORT),AVR_SS_PIN);
	
	/* Set SCK and MOSI as output */
	sbi(DDR(CONTROLLER_SCK_PORT),CONTROLLER_SCK_PIN);
	sbi(DDR(CONTROLLER_MOSI_PORT),CONTROLLER_MOSI_PIN);
	
	/*
	 * Set MISO as input with pullup. This needs to be set for
	 * SPI to work, even though we never use or read it.
	 */
	cbi(DDR(CONTROLLER_MISO_PORT),CONTROLLER_MISO_PIN); // B3 MISO as input
	sbi(CONTROLLER_MISO_PORT,CONTROLLER_MISO_PIN);
	
	/* Set pin to controller SS as output */
	sbi(DDR(CONTROLLER_SS_PORT),CONTROLLER_SS_PIN); // A5

	/* Set LCD A0 pin as output */
	sbi(DDR(CONTROLLER_A0_PORT),CONTROLLER_A0_PIN); // A6
		
	/* Init SS pin high (i.e LCD deselected) */
	sbi(CONTROLLER_SS_PORT,CONTROLLER_SS_PIN);

	/* Deselect LCD */
	GLCD_DESELECT();

	/* MSB first, double speed, SPI mode 0 */
	SPCR = (1<<SPE) | (1<<MSTR) | (0<<CPOL) | (0<<CPHA);	
	sbi(SPSR,SPI2X);
	
	/* Enable interrupts */
	sei();
		
	delay_ms(30); /* Example in datasheet does this (20ms) */

	glcd_ST7565R_init();

	glcd_all_on();
	
	delay_ms(500);
	glcd_normal();

	glcd_set_start_line(0);
	glcd_clear_now();
			
	glcd_select_screen(glcd_buffer,&glcd_bbox);
	
	glcd_clear();	
	
#else
	#error "Controller not supported"
#endif /* GLCD_CONTROLLER_* */
	
}
Пример #2
0
Файл: AVR8.c Проект: cj1324/glcd
void glcd_init(void)
{
	
#if defined(GLCD_CONTROLLER_PCD8544)

	/* Set pin directions */
	
	/*
	 * Set up SPI for AVR8
	 * Note: AVR's SS pin must be set to output, regardless of whether we
	 * actually use it. This is a requirement of SPI mster mode.
	 */
	sbi(DDR(AVR_SS_PORT),AVR_SS_PIN);
	
	/*
	 *  Set MOSI, Master SS, SCK to output (otherwise SPI won't work)
	 *  Must be done even if native SS pin not used
	 */
	sbi(DDR(CONTROLLER_MOSI_PORT),CONTROLLER_MOSI_PIN);
	sbi(DDR(CONTROLLER_SS_PORT),CONTROLLER_SS_PIN);
	sbi(DDR(CONTROLLER_SCK_PORT),CONTROLLER_SCK_PIN);
		
	/* Set SS, DC and RST pins to output */
	sbi( DDR(CONTROLLER_SS_PORT), CONTROLLER_SS_PIN );
	sbi( DDR(CONTROLLER_DC_PORT), CONTROLLER_DC_PIN );
	sbi( DDR(CONTROLLER_RST_PORT), CONTROLLER_RST_PIN );
	
	/* Deselect LCD */
	GLCD_DESELECT();

	/*
	 * Max allowed SPI clock is 4 MHz from datasheet.
	 * Enable SPI, set master mode and clock rate to /4 (4MHz with F_CPU=8MHz)
	 */
	SPCR = (1<<SPE)|(1<<MSTR);
	SPSR = 0;
	
	glcd_reset();
	
	/* Get into the EXTENDED mode! */
	glcd_command(PCD8544_FUNCTION_SET | PCD8544_EXTENDED_INSTRUCTION);

	/* LCD bias select (4 is optimal?) */
	glcd_command(PCD8544_SET_BIAS | 0x2);
	
	/* Set VOP */
	glcd_command(PCD8544_SET_VOP | 50); // Experimentally determined
	
	/* Back to standard instructions */
	glcd_command(PCD8544_FUNCTION_SET); 
	
	/* Normal mode */
	glcd_command(PCD8544_DISPLAY_CONTROL | PCD8544_DISPLAY_NORMAL);

	/* Select screen buffer */
	glcd_select_screen(glcd_buffer,&glcd_bbox);
	
	/* Clear screen, we are now ready to go */
	glcd_clear();

#elif defined(GLCD_CONTROLLER_ST7565R)

	/* Set up GPIO directions */
	
	/*
	 * Set up SPI for AVR8
	 * Note: AVR's SS pin must be set to output, regardless of whether we
	 * actually use it. This is a requirement of SPI mster mode.
	 */
	sbi(DDR(AVR_SS_PORT),AVR_SS_PIN);
	
	/* Set SCK and MOSI as output */
	sbi(DDR(CONTROLLER_SCK_PORT),CONTROLLER_SCK_PIN);
	sbi(DDR(CONTROLLER_MOSI_PORT),CONTROLLER_MOSI_PIN);
	
	/*
	 * Set MISO as input with pullup. This needs to be set for
	 * SPI to work, even though we never use or read it.
	 */
	cbi(DDR(CONTROLLER_MISO_PORT),CONTROLLER_MISO_PIN); // B3 MISO as input
	sbi(CONTROLLER_MISO_PORT,CONTROLLER_MISO_PIN);
	
	/* Set pin to controller SS as output */
	sbi(DDR(CONTROLLER_SS_PORT),CONTROLLER_SS_PIN); // A5
	/* Set LCD A0 pin as output */
	sbi(DDR(CONTROLLER_A0_PORT),CONTROLLER_A0_PIN); // A6
		
	/* Init SS pin high (i.e LCD deselected) */
	sbi(CONTROLLER_SS_PORT,CONTROLLER_SS_PIN);

	/* Deselect LCD */
	GLCD_DESELECT();

	/* MSB first, double speed, SPI mode 0 */
	SPCR = (1<<SPE) | (1<<MSTR) | (0<<CPOL) | (0<<CPHA);	
	sbi(SPSR,SPI2X);
	
	/* Enable interrupts */
	sei();
		
	delay_ms(30); // example in datasheet does this (20ms)

	glcd_command(ST7565R_RESET); // internal reset
	glcd_command(0xa2); // 1/9 bias
	glcd_command(0xa0); // ADC select, normal
	glcd_command(0xc8); // com output reverse
	glcd_command(0xa4); // display all points normal
	glcd_command(0x40); // display start line set
	glcd_command(0x25); // internal resistor ratio
	glcd_command(0x81); // electronic volume mode set
	//glcd_command(0x10); // electronic volume - datasheet's contrast example doesn't work
	glcd_command(45); // this works better
	glcd_command(0x2f); // power controller set
	glcd_command(0xaf); // display on
	
	glcd_all_on();