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Adding cli API call to set LCD backlight brightness (16 bit per channel)

connect
Jacob Alexander 8 years ago
parent
64b232c878
commit
5ca169abd7
2 changed files with 66 additions and 30 deletions
Split View Show Diff Stats
  1. 16
    12
      Scan/STLcd/capabilities.kll
  2. 50
    18
      Scan/STLcd/lcd_scan.c

+ 16
- 12
Scan/STLcd/capabilities.kll View File

@@ -15,15 +15,19 @@ Date = 2015-08-01;
#
# Here's a calculation table valid at a 72 MHz system clock
# Prescalars range from 0 to 7 (1 to 128)
# 0 - 72 MHz - Highest power usage/best result
# 1 - 36 MHz
# 2 - 18 MHz
# 3 - 9 MHz - Slightly visible flicker (peripheral vision)
# 4 - 4 500 kHz - Visible flickering
# 5 - 2 250 kHz
# 6 - 1 125 kHz
# 7 - 562 500 Hz
# Defaulting to no prescalar, looks the best

# Base FTM clock selection (72 MHz system clock)
# @ 0xFFFF period, 72 MHz / 0xFFFF * 2 = Actual period
# Higher pre-scalar will use the most power (also look the best)
# Pre-scalar calculations
# 0 - 72 MHz -> 549 Hz
# 1 - 36 MHz -> 275 Hz
# 2 - 18 MHz -> 137 Hz
# 3 - 9 MHz -> 69 Hz (Slightly visible flicker)
# 4 - 4 500 kHz -> 34 Hz (Visible flickering)
# 5 - 2 250 kHz -> 17 Hz
# 6 - 1 125 kHz -> 9 Hz
# 7 - 562 500 Hz -> 4 Hz
STLcdBacklightPrescalar => STLcdBacklightPrescalar_define;
STLcdBacklightPrescalar = 0;

@@ -38,7 +42,7 @@ STLcdBacklightGreen => STLcdBacklightGreen_define;
STLcdBacklightBlue => STLcdBacklightBlue_define;

# Defaults to 6% brightness, white
STLcdBacklightRed = 0xFFF;
STLcdBacklightGreen = 0xFFF;
STLcdBacklightBlue = 0xFFF;
STLcdBacklightRed = 0x0FFF;
STLcdBacklightGreen = 0x0FFF;
STLcdBacklightBlue = 0x0FFF;


+ 50
- 18
Scan/STLcd/lcd_scan.c View File

@@ -49,9 +49,10 @@
// ----- Function Declarations -----

// CLI Functions
void cliFunc_lcdCmd( char* args );
void cliFunc_lcdInit( char* args );
void cliFunc_lcdTest( char* args );
void cliFunc_lcdCmd ( char* args );
void cliFunc_lcdColor( char* args );
void cliFunc_lcdInit ( char* args );
void cliFunc_lcdTest ( char* args );



@@ -65,11 +66,13 @@ uint8_t cliNormalReverseToggleState = 0;

// Scan Module command dictionary
CLIDict_Entry( lcdCmd, "Send byte via SPI, second argument enables a0. Defaults to control." );
CLIDict_Entry( lcdColor, "Set backlight color. 3 16-bit numbers: R G B. i.e. 0xFFF 0x1444 0x32" );
CLIDict_Entry( lcdInit, "Re-initialize the LCD display." );
CLIDict_Entry( lcdTest, "Test out the LCD display." );

CLIDict_Def( lcdCLIDict, "ST LCD Module Commands" ) = {
CLIDict_Item( lcdCmd ),
CLIDict_Item( lcdColor ),
CLIDict_Item( lcdInit ),
CLIDict_Item( lcdTest ),
{ 0, 0, 0 } // Null entry for dictionary end
@@ -290,25 +293,23 @@ inline void LCD_setup()
FTM0_C2SC = 0x24;

// Base FTM clock selection (72 MHz system clock)
// @ 0xFFFF period, 72 MHz / 0xFFFF * 2 = Actual period
// Higher pre-scalar will use the most power (also look the best)
// Pre-scalar calculations
// 0 - 72 MHz - Highest power usage/best result
// 1 - 36 MHz
// 2 - 18 MHz
// 3 - 9 MHz - Slightly visible flicker (peripheral vision)
// 4 - 4 500 kHz - Visible flickering
// 5 - 2 250 kHz
// 6 - 1 125 kHz
// 7 - 562 500 Hz
// 0 - 72 MHz -> 549 Hz
// 1 - 36 MHz -> 275 Hz
// 2 - 18 MHz -> 137 Hz
// 3 - 9 MHz -> 69 Hz (Slightly visible flicker)
// 4 - 4 500 kHz -> 34 Hz (Visible flickering)
// 5 - 2 250 kHz -> 17 Hz
// 6 - 1 125 kHz -> 9 Hz
// 7 - 562 500 Hz -> 4 Hz
// Using a higher pre-scalar without flicker is possible but FTM0_MOD will need to be reduced
// Which will reduce the brightness range

// System clock, /w prescalar setting
FTM0_SC = FTM_SC_CLKS(1) | FTM_SC_PS( STLcdBacklightPrescalar_define );

/* Write frequency TODO API
FTM0_SC = 0;
FTM0_CNT = 0;
FTM0_MOD = mod;
FTM0_SC = FTM_SC_CLKS(1) | FTM_SC_PS(prescale);
*/

// Red
FTM0_C0V = STLcdBacklightRed_define;
PORTC_PCR1 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(4);
@@ -400,3 +401,34 @@ cmd:
LCD_writeControlReg( cmd );
}

void cliFunc_lcdColor( char* args )
{
char* curArgs;
char* arg1Ptr;
char* arg2Ptr = args;

// Colors
uint16_t rgb[3]; // Red, Green, Blue

// Parse integers from 3 arguments
for ( uint8_t color = 0; color < 3; color++ )
{
curArgs = arg2Ptr;
CLI_argumentIsolation( curArgs, &arg1Ptr, &arg2Ptr );

// Give up if not enough args given
if ( *arg1Ptr == '\0' )
return;

// Convert argument to integer
rgb[ color ] = numToInt( arg1Ptr );
}

// Set PWM channels
FTM0_C0V = rgb[0];
FTM0_C1V = rgb[1];
FTM0_C2V = rgb[2];

print( NL ); // No \r\n by default after the command is entered
}