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_* */
}
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();