void st7565r_set_column(unsigned char column)
{
/* Make sure the address is 7 bits. */
column &= 0x7F;
st7565r_write_command(ST7565R_CMD_COLUMN_SET_MSB(column >> 4));
st7565r_write_command(ST7565R_CMD_COLUMN_SET_LSB(column & 0x0F));
}
void st7565r_init(gpio_pin_t data, gpio_pin_t clk, gpio_pin_t chip_select, gpio_pin_t a0, gpio_pin_t reset)
{
LCD.data = data;
LCD.clk = clk;
LCD.chip_select = chip_select;
LCD.a0 = a0;
LCD.reset = reset;
gpio_set_pin(LCD.clk);
gpio_set_pin(LCD.chip_select);
gpio_set_pin(LCD.reset);
st7564r_hard_reset();
st7565r_write_command(ST7565R_CMD_ADC_NORMAL);
st7565r_write_command(ST7565R_CMD_DISPLAY_NORMAL);
st7565r_write_command(ST7565R_CMD_REVERSE_SCAN_DIRECTION);
st7565r_write_command(ST7565R_CMD_LCD_BIAS_1_DIV_6_DUTY33);
st7565r_write_command(ST7565R_CMD_POWER_CTRL_ALL_ON);
st7565r_write_command(ST7565R_CMD_BOOSTER_RATIO_SET);
st7565r_write_command(ST7565R_CMD_BOOSTER_RATIO_2X_3X_4X);
st7565r_write_command(ST7565R_CMD_VOLTAGE_RESISTOR_RATIO_1);
st7565r_write_command(ST7565R_CMD_DISPLAY_ON);
}
/**
* \brief Initialize the LCD controller
*
* Call this function to initialize the hardware interface and the LCD
* controller. When initialization is done the display is turned on and ready
* to receive data.
*/
void st7565r_init(void)
{
// Do a hard reset of the LCD display controller
st7565r_hard_reset();
// Initialize the interface
st7565r_interface_init();
// Set the A0 pin to the default state (command)
ioport_set_pin_low(ST7565R_A0_PIN);
// The column address is set to increasing
st7565r_write_command(ST7565R_CMD_ADC_NORMAL);
// Non-inverted display
st7565r_display_invert_disable();
// The common mode scan direction is reversed COM31->COM0
st7565r_write_command(ST7565R_CMD_REVERSE_SCAN_DIRECTION);
// Set the voltage bias ratio to 1/6
st7565r_write_command(ST7565R_CMD_LCD_BIAS_1_DIV_6_DUTY33);
// Set booster circuit, voltage regulator and voltage follower all to on
st7565r_write_command(ST7565R_CMD_POWER_CTRL_ALL_ON);
// Set the booster ratio to 2X,3X,4X
st7565r_write_command(ST7565R_CMD_BOOSTER_RATIO_SET);
st7565r_write_command(ST7565R_CMD_BOOSTER_RATIO_2X_3X_4X);
// Set voltage resistor ratio to 1
st7565r_write_command(ST7565R_CMD_VOLTAGE_RESISTOR_RATIO_1);
/* Set contrast to min value, no need to check return value as the contrast
is set to the defined min*/
st7565r_set_contrast(ST7565R_DISPLAY_CONTRAST_MIN);
// Turn on the display
st7565r_display_on();
}
void st7565r_set_page(unsigned char page)
{
/* Make sure that the address is 4 bits (only 8 pages). */
page &= 0x0F;
st7565r_write_command(ST7565R_CMD_PAGE_SET(page));
}
