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issue #2191

This commit is contained in:
kraus 2023-07-16 12:02:05 +02:00
parent 6bdd7d2913
commit fdbd47ee37
3 changed files with 110 additions and 19 deletions
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1
csrc/u8x8_byte.c
View File

@ -437,6 +437,7 @@ uint8_t u8x8_byte_sed1520(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_
case U8X8_MSG_BYTE_START_TRANSFER:
/* cs lines are not supported for the SED1520/SBN1661 */
/* instead, this will select the E1 or E2 line */
/* arg_int is set by u8x8_d_sbn1661_122x32() function */
enable_pin = U8X8_MSG_GPIO_E;
if ( arg_int != 0 )
enable_pin = U8X8_MSG_GPIO_CS;

2
sys/arduino/u8g2_full_buffer/HelloWorld/HelloWorld.ino
View File

@ -293,7 +293,7 @@
//U8G2_LC7981_240X128_F_6800 u8g2(U8G2_R0, 8, 9, 10, 11, 4, 5, 6, 7, /*enable=*/ 18, /*cs=*/ 14, /*dc=*/ 15, /*reset=*/ 16); // Connect RW with GND
//U8G2_LC7981_240X64_F_6800 u8g2(U8G2_R0, 8, 9, 10, 11, 4, 5, 6, 7, /*enable=*/ 18, /*cs=*/ 14, /*dc=*/ 15, /*reset=*/ 16); // Connect RW with GND
//U8G2_LC7981_128X128_F_6800 u8g2(U8G2_R0, 8, 9, 10, 11, 4, 5, 6, 7, /*enable=*/ 18, /*cs=*/ 14, /*dc=*/ 15, /*reset=*/ 16); // Connect RW with GND
//U8G2_SED1520_122X32_F u8g2(U8G2_R0, 8, 9, 10, 11, 4, 5, 6, 7, /*dc=*/ A0, /*e1=*/ A3, /*e2=*/ A2, /* reset=*/ A4); // Set R/W to low!
U8G2_SED1520_122X32_F u8g2(U8G2_R0, 8, 9, 10, 11, 4, 5, 6, 7, /*dc=*/ A0, /*e1=*/ A3, /*e2=*/ A2, /* reset=*/ A4); // Set R/W to low!
//U8G2_T6963_240X128_F_8080 u8g2(U8G2_R0, 8, 9, 10, 11, 4, 5, 6, 7, /*enable/wr=*/ 17, /*cs/ce=*/ 14, /*dc=*/ 15, /*reset=*/ 16); // Connect RD with +5V, FS0 and FS1 with GND
//U8G2_T6963_256X64_F_8080 u8g2(U8G2_R0, 8, 9, 10, 11, 4, 5, 6, 7, /*enable/wr=*/ 17, /*cs/ce=*/ 14, /*dc=*/ 15, /*reset=*/ 16); // Connect RD with +5V, FS0 and FS1 with GND
//U8G2_T6963_160X80_F_8080 u8g2(U8G2_R0, 8, 9, 10, 11, 4, 5, 6, 7, /*enable/wr=*/ 17, /*cs/ce=*/ 14, /*dc=*/ 15, /*reset=*/ 16); // Connect RD with +5V, FS0 and FS1 with GND

126
sys/arduino/u8g2_page_buffer/I2CLCDBoard/I2CLCDBoard.ino
View File

@ -40,9 +40,9 @@
/*
Example for the I2C GFX Board https://github.com/olikraus/u8g2/issues/2191
Example for the I2C LCD GFX Board https://github.com/olikraus/u8g2/issues/2191
Required updates for T6963 and LC7981 :
1. Update write strobe and chip select signals in "u8x8_byte_i2c_lcd_board()"
1. Update write strobe and chip select signals in "u8x8_byte_i2c_lcd_gfx_board_t6963_8080()"
2. Update the setup procedure in "setup()"
@ -78,7 +78,7 @@
only update operation will be u8x8_set_ctrl_bit(u8x8, 0, 1);
typically the second argument will be one of the I2C_LCD_xxx macros
reusing the i2c_started member, which is not used by the i2c lcd board software (i2c_started is only used by sw emulated i2c)
reusing the "i2c_started" member variable, which is not used by the i2c lcd board software (i2c_started is only used by sw emulated i2c)
*/
void u8x8_set_ctrl_bit(u8x8_t *u8x8, uint8_t bit, uint8_t is_set) U8X8_NOINLINE;
void u8x8_set_ctrl_bit(u8x8_t *u8x8, uint8_t bit, uint8_t is_set)
@ -96,7 +96,7 @@ void u8x8_set_ctrl_bit(u8x8_t *u8x8, uint8_t bit, uint8_t is_set)
/*
The new gpio&delay procedure extents the existing arduino procedure and adds proper reset handling
*/
uint8_t u8x8_gpio_and_delay_i2c_lcd_board(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, U8X8_UNUSED void *arg_ptr)
uint8_t u8x8_gpio_and_delay_i2c_lcd_gfx_board(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, U8X8_UNUSED void *arg_ptr)
{
uint8_t i;
switch(msg)
@ -105,18 +105,21 @@ uint8_t u8x8_gpio_and_delay_i2c_lcd_board(u8x8_t *u8x8, uint8_t msg, uint8_t arg
u8x8_set_ctrl_bit(u8x8, I2C_LCD_RESET, arg_int);
return 1;
case U8X8_MSG_GPIO_AND_DELAY_INIT:
u8x8->i2c_started = I2C_LCD_CS|I2C_LCD_RD|I2C_LCD_RESET|I2C_LCD_LED_DEFAULT; // reused i2c_started to store the gpio state
u8x8_set_ctrl_bit(u8x8, 0, 1); // just transmit the control byte
u8x8->i2c_started = I2C_LCD_CS|I2C_LCD_RD|I2C_LCD_RESET|I2C_LCD_LED_DEFAULT; // assign default value for ctrl byte, reuse "i2c_started" member variable to store the gpio state
u8x8_set_ctrl_bit(u8x8, 0, 1); // just transmit the control byte (which is stored in "i2c_started" member variable)
return 1;
}
return u8x8_gpio_and_delay_arduino(u8x8, msg, arg_int, arg_ptr);
}
/*
This is an example byte level procedure for my T6963 board.
Chips select and write strobe signals may differ.
This is an example byte level procedure for a T6963 board.
This procedure will assume, that the T6963 is configured in 8080 mode.
Probably the same procedure can be also used for LC7981 displays.
In general chip select and write strobe signals may differ and need to be checked.
*/
uint8_t u8x8_byte_i2c_lcd_board(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
uint8_t u8x8_byte_i2c_lcd_gfx_board_t6963_8080(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 write_strobe = I2C_LCD_RW; /* T6963 in 8080mode */
@ -171,18 +174,103 @@ uint8_t u8x8_byte_i2c_lcd_board(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void
}
/*
This is an example byte level procedure for SED1520 / SBN1661 displays.
The display needs to be configured in 6800 mode.
In general chip select and write strobe signals may differ and need to be checked.
*/
uint8_t u8x8_byte_i2c_lcd_gfx_board_sed1520_6800(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
uint8_t chip_select = I2C_LCD_CS;
uint8_t *data;
static uint8_t enable_pin = I2C_LCD_E; // the enable pin may differ. The current enable pin number is stored here
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_pin, 0);
//u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, 200);
//u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->write_pulse_width_ns);
u8x8_set_ctrl_bit(u8x8, enable_pin, 1);
}
break;
case U8X8_MSG_BYTE_INIT:
Wire.begin();
Wire.setClock(400000); // Assumption: PCF8574A supports fast I2C mode
/* 6800 mode: Permanently assign R/W to GND */
u8x8_set_ctrl_bit(u8x8, I2C_LCD_RW, 0); // in 6800 mode, the R/W can 0 all the time (write mode only)
/* chipselect */
u8x8_set_ctrl_bit(u8x8, I2C_LCD_CS, 0); // there is no CS for the SED1520... but still, we apply a default value here
/* ensure that the enable signal is high */
u8x8_set_ctrl_bit(u8x8, I2C_LCD_E, 0); // clear E1
u8x8_set_ctrl_bit(u8x8, I2C_LCD_E2, 0); // clear E2
enable_pin = I2C_LCD_E; // assign E1 as initial enable signal
break;
case U8X8_MSG_BYTE_SET_DC:
u8x8_set_ctrl_bit(u8x8, I2C_LCD_CD, arg_int); // command/data data/command
break;
case U8X8_MSG_BYTE_START_TRANSFER:
/* arg_int is set by u8x8_d_sbn1661_122x32() function (which is also used by sed1520) */
enable_pin = I2C_LCD_E;
if ( arg_int != 0 ) // the CAD procedure will tell, which enable signal to use
enable_pin = I2C_LCD_E2;
break;
case U8X8_MSG_BYTE_END_TRANSFER:
break;
default:
return 0;
}
return 1;
}
U8G2 u8g2; // create a plain U8g2 object
void setup(void) {
void setup(void)
{
/*
Do a manual update of the plain U8g2 object with the C API for the display.
Use a special byte function, which includes the support for the I2C GFX boad.
Use a special byte function, which includes the support for the I2C LCD GFX boad.
The C init functions are listed here: https://github.com/olikraus/u8g2/wiki/u8g2setupc
Just replace the function name accordingly.
Note:
For T6963 / LC7981 displays, use the "u8x8_byte_i2c_lcd_gfx_board_t6963_8080" callback function.
For SBN1661 / SED1520 use the "u8x8_byte_i2c_lcd_gfx_board_sed1520_6800" callback function.
*/
// u8g2_Setup_t6963_240x128_2(u8g2.getU8g2(), U8G2_R0, u8x8_byte_i2c_lcd_gfx_board_t6963_8080, u8x8_gpio_and_delay_i2c_lcd_gfx_board);
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);
/*
After providing the callback function, start the communication with the display by using u8g2.begin()
*/
u8g2_Setup_t6963_240x128_2(u8g2.getU8g2(), U8G2_R0, u8x8_byte_i2c_lcd_board, u8x8_gpio_and_delay_i2c_lcd_board);
u8g2.begin();
}
@ -190,14 +278,16 @@ uint8_t x = 0;
long t = 0;
long tt = 0;
void loop(void) {
void loop(void)
{
t = millis();
u8g2.firstPage();
do {
u8g2.setFont(u8g2_font_ncenB24_tr);
u8g2.drawStr(x*2,32,"Hello World!");
u8g2.drawStr(x*2,64,"U8g2");
u8g2.setCursor(x*2, 96);
do
{
u8g2.setFont(u8g2_font_ncenB18_tr);
u8g2.drawStr(x*2,19,"Hello World!");
u8g2.setFont(u8g2_font_ncenB12_tr);
u8g2.setCursor(x*2, 32);
u8g2.print(tt, DEC);
} while ( u8g2.nextPage() );
x++;