mrohner
commented
5 years ago I added this as a file. You have to also update the main, change the include and some other #ifdefs First line is for Date and Time. Second and 3rd is for the station and song, 4th is for volume
//***************************************************************************************************
//* LCD2004.h -- Driver for LCD 2004 display with I2C backpack. *
//***************************************************************************************************
// The backpack communicates with the I2C bus and converts the serial data to parallel for the *
// 2004 board. In the serial data, the 8 bits are assigned as follows: *
// Bit Destination Description *
// --- ----------- ------------------------------------ *
// 0 RS H=data, L=command *
// 1 RW H=read, L=write. Only write is used. *
// 2 E Enable *
// 3 BL Backlight, H=on, L=off. Always on. *
// 4 D4 Data bit 4 *
// 5 D5 Data bit 5 *
// 6 D6 Data bit 6 *
// 7 D7 Data bit 7 *
//***************************************************************************************************
//
// Note that the display function are limited due to the minimal available space.
#include <driver/i2c.h>
#define I2C_ADDRESS 0x27 // Adjust for your display
#define ACKENA true // Enable ACK for I2C communication
// Color definitions for the TFT screen (if used)
#define BLACK 0
#define BLUE 1
#define RED 1
#define GREEN 0
#define CYAN GREEN | BLUE
#define MAGENTA RED | BLUE
#define YELLOW RED | GREEN
#define WHITE RED | GREEN | BLUE
#define DELAY_ENABLE_PULSE_SETTLE 50 // Command requires > 37us to settle
#define FLAG_BACKLIGHT_ON 0b00001000 // Bit 3, backlight enabled (disabled if clear)
#define FLAG_ENABLE 0b00000100 // Bit 2, Enable
#define FLAG_RS_DATA 0b00000001 // Bit 0, RS=data (command if clear)
#define FLAG_RS_COMMAND 0b00000000 // Command
#define COMMAND_CLEAR_DISPLAY 0x01
#define COMMAND_RETURN_HOME 0x02
#define COMMAND_ENTRY_MODE_SET 0x04
#define COMMAND_DISPLAY_CONTROL 0x08
#define COMMAND_FUNCTION_SET 0x20
#define COMMAND_SET_DDRAM_ADDR 0x80
//
#define FLAG_DISPLAY_CONTROL_DISPLAY_ON 0x04
#define FLAG_DISPLAY_CONTROL_CURSOR_ON 0x02
//
#define FLAG_FUNCTION_SET_MODE_4BIT 0x00
#define FLAG_FUNCTION_SET_LINES_2 0x08
#define FLAG_FUNCTION_SET_DOTS_5X8 0x00
//
#define FLAG_ENTRY_MODE_SET_ENTRY_INCREMENT 0x02
#define FLAG_ENTRY_MODE_SET_ENTRY_SHIFT_ON 0x01
//
// Various macro's to mimic the ST7735 version of display functions
#define dsp_setRotation() // Use standard landscape format
#define dsp_print(a) // Print a string
#define dsp_println(a) // Print string plus newline
#define dsp_fillRect(a,b,c,d,e) // Fill a rectange
#define dsp_setTextSize(a) // Set the text size
#define dsp_setTextColor(a)
#define dsp_setCursor(a,b) // Position the cursor
#define dsp_erase() tft->sclear() // Clear the screen
#define dsp_getwidth() 20 // Get width of screen
#define dsp_getheight() 4 // Get height of screen
#define dsp_usesSPI() false // Does not use SPI
#define TFTSECS 4 // 4 sections, only 2 used
scrseg_struct tftdata[TFTSECS] = // Screen divided in 4 segments
{
{ false, WHITE, 0, 0, "" }, // 1 top line (dummy)
{ false, WHITE, 0, 0, "" }, // 8 lines in the middle
{ false, WHITE, 0, 0, "" }, // 4 lines at the bottom
{ false, WHITE, 0, 0, "" } // 4 lines at the bottom for rotary encoder
} ;
class LCD1602
{
public:
LCD1602 ( uint8_t sda, uint8_t scl ) ; // Constructor
void print ( char c ) ; // Send 1 char
void reset() ; // Perform reset
void sclear() ; // Clear the screen
void shome() ; // Go to home position
void scursor ( uint8_t col, uint8_t row ) ; // Position the cursor
void scroll ( bool son ) ; // Set scroll on/off
private:
i2c_config_t i2c_config ; // I2C configuration
i2c_cmd_handle_t hnd ; // Handle for driver
void scommand ( uint8_t cmd ) ;
void strobe ( uint8_t cmd ) ;
void swrite ( uint8_t val, uint8_t rs ) ;
void write_cmd ( uint8_t val ) ;
void write_data ( uint8_t val ) ;
uint8_t bl = FLAG_BACKLIGHT_ON ; // Backlight in every command
uint8_t xchar = 0 ; // Current cursor position (text)
uint8_t ychar = 0 ; // Current cursor position (text)
} ;
LCD1602* tft = NULL ;
bool dsp_begin()
{
dbgprint ( "Init LCD2004, I2C pins %d,%d", ini_block.tft_sda_pin,
ini_block.tft_scl_pin ) ;
if ( ( ini_block.tft_sda_pin >= 0 ) &&
( ini_block.tft_scl_pin >= 0 ) )
{
tft = new LCD1602 ( ini_block.tft_sda_pin,
ini_block.tft_scl_pin ) ; // Create an instance for TFT
}
else
{
dbgprint ( "Init LCD2004 failed!" ) ;
}
return ( tft != NULL ) ;
}
//***********************************************************************************************
// L C D 1 6 0 2 write functions *
//***********************************************************************************************
// Write functins for command, data and general. *
//***********************************************************************************************
void LCD1602::swrite ( uint8_t val, uint8_t rs ) // General write, 8 bits data
{
strobe ( ( val & 0xf0 ) | rs ) ; // Send 4 LSB bits
strobe ( ( val << 4 ) | rs ) ; // Send 4 MSB bits
}
void LCD1602::write_data ( uint8_t val )
{
swrite ( val, FLAG_RS_DATA ) ; // Send data (RS = HIGH)
}
void LCD1602::write_cmd ( uint8_t val )
{
swrite ( val, FLAG_RS_COMMAND ) ; // Send command (RS = LOW)
}
//***********************************************************************************************
// L C D 1 6 0 2 :: S T R O B E *
//***********************************************************************************************
// Send data followed by strobe to clock data to LCD. *
//***********************************************************************************************
void LCD1602::strobe ( uint8_t cmd )
{
scommand ( cmd | FLAG_ENABLE ) ; // Send command with E high
scommand ( cmd ) ; // Same command with E low
delayMicroseconds ( DELAY_ENABLE_PULSE_SETTLE ) ; // Wait a short time
}
//***********************************************************************************************
// L C D 1 6 0 2 :: S C O M M A N D *
//***********************************************************************************************
// Send a command to the LCD. *
// Actual I/O. Open a channel to the I2C interface and write one byte. *
//***********************************************************************************************
void LCD1602::scommand ( uint8_t cmd )
{
hnd = i2c_cmd_link_create() ; // Create a link
if ( i2c_master_start ( hnd ) |
i2c_master_write_byte ( hnd, (I2C_ADDRESS << 1) | // Add I2C address to output buffer
I2C_MASTER_WRITE,
ACKENA ) |
i2c_master_write_byte ( hnd, cmd | bl, // Add command including BL state
ACKENA ) |
i2c_master_stop ( hnd ) | // End of data for I2C
i2c_master_cmd_begin ( I2C_NUM_0, hnd, // Send bufferd data to LCD
10 / portTICK_PERIOD_MS ) )
{
dbgprint ( "LCD2004 communication error!" ) ; // Something went wrong (not connected)
}
i2c_cmd_link_delete ( hnd ) ; // Link not needed anymore
}
//***********************************************************************************************
// L C D 1 6 0 2 :: P R I N T *
//***********************************************************************************************
// Put a character in the buffer. *
//***********************************************************************************************
void LCD1602::print ( char c )
{
write_data ( c ) ;
}
//***********************************************************************************************
// L C D 1 6 0 2 :: S C U R S O R *
//***********************************************************************************************
// Place the cursor at the requested position. *
//***********************************************************************************************
void LCD1602::scursor ( uint8_t col, uint8_t row )
{
const int row_offsets[] = { 0x00, 0x40, 0x14, 0x54 } ;
write_cmd ( COMMAND_SET_DDRAM_ADDR |
( col + row_offsets[row] ) ) ;
}
//***********************************************************************************************
// L C D 1 6 0 2 :: S C L E A R *
//***********************************************************************************************
// Clear the LCD. *
//***********************************************************************************************
void LCD1602::sclear()
{
write_cmd ( COMMAND_CLEAR_DISPLAY ) ;
}
//***********************************************************************************************
// L C D 1 6 0 2 :: S C R O L L *
//***********************************************************************************************
// Set scrolling on/off. *
//***********************************************************************************************
void LCD1602::scroll ( bool son )
{
uint8_t ecmd = COMMAND_ENTRY_MODE_SET | // Assume no scroll
FLAG_ENTRY_MODE_SET_ENTRY_INCREMENT ;
if ( son ) // Scroll on?
{
ecmd |= FLAG_ENTRY_MODE_SET_ENTRY_SHIFT_ON ; // Yes, change function
}
write_cmd ( ecmd ) ; // Perform command
}
//***********************************************************************************************
// L C D 1 6 0 2 :: S H O M E *
//***********************************************************************************************
// Go to home position. *
//***********************************************************************************************
void LCD1602::shome()
{
write_cmd ( COMMAND_RETURN_HOME ) ;
}
//***********************************************************************************************
// L C D 1 6 0 2 :: R E S E T *
//***********************************************************************************************
// Reset the LCD. *
//***********************************************************************************************
void LCD1602::reset()
{
scommand ( 0 ) ; // Put expander to known state
delayMicroseconds ( 1000 ) ;
for ( int i = 0 ; i < 3 ; i++ ) // Repeat 3 times
{
strobe ( 0x03 << 4 ) ; // Select 4-bit mode
delayMicroseconds ( 4500 ) ;
}
strobe ( 0x02 << 4 ) ; // 4-bit
delayMicroseconds ( 4500 ) ;
write_cmd ( COMMAND_FUNCTION_SET |
FLAG_FUNCTION_SET_MODE_4BIT |
FLAG_FUNCTION_SET_LINES_2 |
FLAG_FUNCTION_SET_DOTS_5X8 ) ;
write_cmd ( COMMAND_DISPLAY_CONTROL |
FLAG_DISPLAY_CONTROL_DISPLAY_ON ) ;
sclear() ;
write_cmd ( COMMAND_ENTRY_MODE_SET |
FLAG_ENTRY_MODE_SET_ENTRY_INCREMENT ) ;
shome() ;
for ( char a = 'a' ; a < 'q' ; a++ )
{
print ( a ) ;
}
}
//***********************************************************************************************
// L C D 1 6 0 2 *
//***********************************************************************************************
// Constructor for the display. *
//***********************************************************************************************
LCD1602::LCD1602 ( uint8_t sda, uint8_t scl )
{
esp_err_t espRc ;
i2c_config.mode = I2C_MODE_MASTER,
i2c_config.sda_io_num = (gpio_num_t)sda ;
i2c_config.sda_pullup_en = GPIO_PULLUP_DISABLE ;
i2c_config.scl_io_num = (gpio_num_t)scl ;
i2c_config.scl_pullup_en = GPIO_PULLUP_DISABLE ;
i2c_config.master.clk_speed = 100000 ;
if ( i2c_param_config ( I2C_NUM_0, &i2c_config ) != ESP_OK )
{
dbgprint ( "param_config error!" ) ;
}
else if ( i2c_driver_install ( I2C_NUM_0, I2C_MODE_MASTER, 0, 0, 0 ) != ESP_OK )
{
dbgprint ( "driver_install error!" ) ;
}
reset() ;
}
struct dsp_str
{
String str ;
uint16_t len ; // Length of string to show
uint16_t pos ; // Start on this position of string
uint8_t row ; // Row on display
} ;
dsp_str dline[4] = { { "", 0, 0, 0 },
{ "", 0, 0, 0 },
{ "", 0, 0, 0 },
{ "", 0, 0, 0 }
} ;
//***********************************************************************************************
// D S P _U P D A T E _ L I N E *
//***********************************************************************************************
// Show a selected line *
//***********************************************************************************************
void dsp_update_line ( uint8_t lnr )
{
uint8_t i ; // Index in string
const char* p ;
p = dline[lnr].str.c_str() ;
dline[lnr].len = strlen ( p ) ;
//dbgprint ( "Strlen is %d, str is %s", len, p ) ;
if ( dline[lnr].len > dsp_getwidth() )
{
if ( dline[lnr].pos >= dline[lnr].len )
{
dline[lnr].pos = 0 ;
}
else
{
p += dline[lnr].pos ;
}
dline[lnr].len -= dline[lnr].pos ;
if ( dline[lnr].len > dsp_getwidth() )
{
dline[lnr].len = dsp_getwidth() ;
}
}
else
{
dline[lnr].pos = 0 ; // String fits on screen
}
dline[lnr].pos++ ;
tft->scursor ( 0, lnr ) ;
for ( i = 0 ; i < dline[lnr].len ; i++ )
{
if ( ( *p >= ' ' ) && ( *p <= '~' ) ) // Printable?
{
tft->print ( *p ) ; // Yes
}
else
{
tft->print ( ' ' ) ; // Yes, print space
}
p++ ;
}
for ( i = 0 ; i < ( dsp_getwidth() - dline[lnr].len ) ; i++ ) // Fill remainder
{
tft->print ( ' ' ) ;
}
if ( *p == '\0' ) // At end of line?
{
dline[lnr].pos = 0 ; // Yes, start allover
}
}
//***********************************************************************************************
// D S P _U P D A T E *
//***********************************************************************************************
// Show a selection of the 4 sections *
//***********************************************************************************************
void dsp_update()
{
static uint16_t cnt = 0 ; // Reduce updates
if ( cnt++ != 8 ) // Action every 8 calls
{
return ;
}
cnt = 0 ;
if ( enc_menu_mode != VOLUME ) // Encoder menu mode?
{
dline[1].str = tftdata[3].str.substring(0,dsp_getwidth()) ; // Yes, different lines
dline[2].str = tftdata[3].str.substring(dsp_getwidth()) ;
}
else
{
dline[2].str = tftdata[1].str ; // Local copy
dline[1].str = tftdata[2].str ; // Local copy
}
dline[2].str.trim() ; // Remove non printing
dline[1].str.trim() ; // Remove non printing
if ( dline[2].str.length() > dsp_getwidth() )
{
dline[2].str += String ( " " ) ;
}
if ( dline[1].str.length() > dsp_getwidth() )
{
dline[1].str += String ( " " ) ;
}
dsp_update_line ( 1 ) ;
dsp_update_line ( 2 ) ;
}
//**************************************************************************************************
// D I S P L A Y B A T T E R Y *
//**************************************************************************************************
// Dummy routine for this type of display. *
//**************************************************************************************************
void displaybattery()
{
}
//**************************************************************************************************
// D I S P L A Y V O L U M E *
//**************************************************************************************************
// Dummy routine for this type of display. *
//**************************************************************************************************
void displayvolume(){
static uint8_t oldvol = 0 ; // Previous volume
uint8_t newvol ; // Current setting
uint16_t pos ; // Positon of volume indicator
dline[3].str = "";
newvol = vs1053player->getVolume() ; // Get current volume setting
if ( newvol != oldvol ) // Volume changed?
{
oldvol = newvol ; // Remember for next compare
pos = map ( newvol-39, 0, 100, 0, dsp_getwidth() ) ; // Compute position on TFT (-39 as I can hear nothing with this volume)
for ( int i = 0 ; i < pos ; i++ ) // Set oldstr to dots
dline[3].str += "-"; // Local copy
for ( int i = 0 ; i < dsp_getwidth()-pos ; i++ )
dline[3].str += " ";
dsp_update_line(3);
}
}
//**************************************************************************************************
// D I S P L A Y T I M E *
//**************************************************************************************************
// *
//**************************************************************************************************
void displaytime ( const char* str, uint16_t color ){
const char* WDAYS [] ={"Mon","Tue","Wed","Thu","Fri","Sat","Sun"};
char datetxt[21] ;
sprintf ( datetxt, "%03s %02d.%02d. %08s", // Format new time to a string
WDAYS[timeinfo.tm_wday-1],
timeinfo.tm_mday,
timeinfo.tm_mon,
str) ;
char oldstr[21] = "...................." ; // For compare
uint8_t i ; // Index in strings
if ( datetxt[14] == '0' ) { // Empty string?
for ( int i = 0 ; i < 21 ; i++ ) // Set oldstr to dots
oldstr[i] = '.' ;
return ; // No actual display yet
}
if ( datetxt != oldstr ) { // Difference?
dline[0].str = datetxt;
dsp_update_line(0);
for ( int i = 0 ; i < 21 ; i++ ) // Set oldstr to dots
oldstr[i] = datetxt[i] ;
}
}
ememem13
h1aji
Edzelf
I think it would be nice to have bigger display that would be more informative and will show volume level bitrate and time with date.
Since there is not much difference in price.