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KS0108, issue #2191

This commit is contained in:
kraus 2024-03-13 22:15:47 +01:00
parent 4c8fea312c
commit 55d92aaa4b
1 changed files with 79 additions and 1 deletions
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80
sys/arduino/u8g2_page_buffer/I2CLCDBoard/I2CLCDBoard.ino
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@ -378,6 +378,83 @@ uint8_t u8x8_byte_i2c_lcd_gfx_board_st7920(u8x8_t *u8x8, uint8_t msg, uint8_t ar
return 1;
}
/*
This is an example byte level procedure for a KS0108 display board.
The KS0108 192x64 display must be connected to J9 of the I2C GFX Board (2024 PCB).
See also: https://github.com/olikraus/u8g2/issues/2191
*/
uint8_t u8x8_byte_i2c_lcd_gfx_board_ks0108(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
/* usually only the following two varibables need to be modified */
uint8_t read_write = I2C_LCD_RW; /* Must be permanently 0 for the KS0108 */
uint8_t enable_strobe = I2C_LCD_E; /* Used to latch in data for the KS0108 */
uint8_t cs1 = I2C_LCD_CS; /* CS1 */
uint8_t cs2 = I2C_LCD_E2; /* CS2 see mapping, in https://github.com/olikraus/u8g2/issues/2191 */
uint8_t cs3 = I2C_LCD_RD; /* CS3 see mapping, in https://github.com/olikraus/u8g2/issues/2191 */
uint8_t *data;
switch(msg)
{
case U8X8_MSG_BYTE_SEND:
data = (uint8_t *)arg_ptr;
while( arg_int > 0 )
{
Wire.beginTransmission(I2C_LCD_DATA_ADR);
Wire.write(*data);
Wire.endTransmission();
data++;
arg_int--;
// Assumption: u8x8_set_ctrl_bit() will be slow enough, so that no extra delay is required
//u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->data_setup_time_ns);
u8x8_set_ctrl_bit(u8x8, enable_strobe, 1);
//u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->write_pulse_width_ns);
u8x8_set_ctrl_bit(u8x8, enable_strobe, 0);
}
break;
case U8X8_MSG_BYTE_INIT:
Wire.begin();
Wire.setClock(400000); // Assumption: PCF8574A supports fast I2C mode
/* ensure that the enable signal is low (ST7920 datasheet) */
u8x8_set_ctrl_bit(u8x8, enable_strobe, 0); // Generate low-high-low pulse for data transfer, so start with 0
u8x8_set_ctrl_bit(u8x8, read_write, 0); // must be permanently low for write mode
u8x8_set_ctrl_bit(u8x8, cs1, 1);
u8x8_set_ctrl_bit(u8x8, cs2, 1);
u8x8_set_ctrl_bit(u8x8, cs3, 1);
u8x8_set_ctrl_bit(u8x8, I2C_LCD_CD, 0);
break;
case U8X8_MSG_BYTE_SET_DC:
u8x8_set_ctrl_bit(u8x8, I2C_LCD_CD, arg_int); // command/data
break;
case U8X8_MSG_BYTE_START_TRANSFER:
/* expects 3 bits in arg_int for the chip select lines */
if ( arg_int&1 ) u8x8->i2c_started|=cs1; else u8x8->i2c_started&=~cs1;
if ( arg_int&2 ) u8x8->i2c_started|=cs2; else u8x8->i2c_started&=~cs2;
if ( arg_int&4 ) u8x8->i2c_started|=cs3; else u8x8->i2c_started&=~cs3;
u8x8_set_ctrl_bit(u8x8, 0, 1); // just transmit the control byte (which is stored in "i2c_started" member variable)
//u8x8_set_ctrl_bit(u8x8, chip_select, u8x8->display_info->chip_enable_level); // command/data data/command
//u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->post_chip_enable_wait_ns, NULL);
break;
case U8X8_MSG_BYTE_END_TRANSFER:
/* expects 3 bits in arg_int for the chip select lines */
if ( arg_int&1 ) u8x8->i2c_started|=cs1; else u8x8->i2c_started&=~cs1;
if ( arg_int&2 ) u8x8->i2c_started|=cs2; else u8x8->i2c_started&=~cs2;
if ( arg_int&4 ) u8x8->i2c_started|=cs3; else u8x8->i2c_started&=~cs3;
u8x8_set_ctrl_bit(u8x8, 0, 1); // just transmit the control byte (which is stored in "i2c_started" member variable)
//u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->pre_chip_disable_wait_ns, NULL);
//u8x8_set_ctrl_bit(u8x8, chip_select, u8x8->display_info->chip_disable_level); // command/data data/command
break;
default:
return 0;
}
return 1;
}
U8G2 u8g2; // create a plain U8g2 object
@ -401,7 +478,8 @@ void setup(void)
//u8g2_Setup_t6963_128x128_2(u8g2.getU8g2(), U8G2_R0, u8x8_byte_i2c_lcd_gfx_board_t6963_8080, u8x8_gpio_and_delay_i2c_lcd_gfx_board); // J2
//u8g2_Setup_sed1520_122x32_2(u8g2.getU8g2(), U8G2_R0, u8x8_byte_i2c_lcd_gfx_board_sed1520_6800, u8x8_gpio_and_delay_i2c_lcd_gfx_board); // J5
//u8g2_Setup_st7920_128x64_2(u8g2.getU8g2(), U8G2_R0, u8x8_byte_i2c_lcd_gfx_board_st7920, u8x8_gpio_and_delay_i2c_lcd_gfx_board); // J3
u8g2_Setup_lc7981_240x128_2(u8g2.getU8g2(), U8G2_R0, u8x8_byte_i2c_lcd_gfx_board_lc7981_6800, u8x8_gpio_and_delay_i2c_lcd_gfx_board); // J3
//u8g2_Setup_lc7981_240x128_2(u8g2.getU8g2(), U8G2_R0, u8x8_byte_i2c_lcd_gfx_board_lc7981_6800, u8x8_gpio_and_delay_i2c_lcd_gfx_board); // J3
u8g2_Setup_ks0108_erm19264_2(u8g2.getU8g2(), U8G2_R0, u8x8_byte_i2c_lcd_gfx_board_ks0108, u8x8_gpio_and_delay_i2c_lcd_gfx_board); // J9 (requires 2024 PCB)
/*
After providing the callback function, start the communication with the display by using u8g2.begin()