Jacob Alexander
8 years ago
2 changed files with 88 additions and 10 deletions
+ 44
- 0
Scan/STLcd/capabilities.kll
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| @@ -0,0 +1,44 @@ | |||
| Name = STLcdCapabilities; | |||
| Version = 0.1; | |||
| Author = "HaaTa (Jacob Alexander) 2015"; | |||
| KLL = 0.3c; | |||
| # Modified Date | |||
| Date = 2015-08-01; | |||
| # Defines available to the STLcd sub-module | |||
| # PWM Prescalar | |||
| # In general this can be left alone | |||
| # A higher prescalar should be lower power usage (less switching) | |||
| # However, flickering may be noticeable. | |||
| # | |||
| # 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 | |||
| STLcdBacklightPrescalar => STLcdBacklightPrescalar_define; | |||
| STLcdBacklightPrescalar = 0; | |||
| # Default Backlight Channel Brightness | |||
| # There are 3 channels, RGB | |||
| # In order to get other colors you must mix the 3 colors | |||
| # Each channel is a 16-bit register (65536 levels) | |||
| # Technically, this means, the backlight is a 48-bit RGB pixel | |||
| # In practice, it may be difficult to get color consistency at times if too bright or too dim | |||
| STLcdBacklightRed => STLcdBacklightRed_define; | |||
| STLcdBacklightGreen => STLcdBacklightGreen_define; | |||
| STLcdBacklightBlue => STLcdBacklightBlue_define; | |||
| # Defaults to 6% brightness, white | |||
| STLcdBacklightRed = 0xFFF; | |||
| STLcdBacklightGreen = 0xFFF; | |||
| STLcdBacklightBlue = 0xFFF; | |||
+ 44
- 10
Scan/STLcd/lcd_scan.c
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| @@ -21,6 +21,7 @@ | |||
| // Project Includes | |||
| #include <cli.h> | |||
| #include <kll.h> | |||
| #include <led.h> | |||
| #include <print.h> | |||
| @@ -276,16 +277,49 @@ inline void LCD_setup() | |||
| // Setup Backlight | |||
| // TODO Expose default settings | |||
| // TODO Setup PWM | |||
| GPIOC_PDDR |= (1<<1); | |||
| PORTC_PCR1 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1); | |||
| GPIOC_PCOR |= (1<<1); | |||
| GPIOC_PDDR |= (1<<2); | |||
| PORTC_PCR2 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1); | |||
| GPIOC_PCOR |= (1<<2); | |||
| GPIOC_PDDR |= (1<<3); | |||
| PORTC_PCR3 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1); | |||
| GPIOC_PCOR |= (1<<3); | |||
| SIM_SCGC6 |= SIM_SCGC6_FTM0; | |||
| FTM0_CNT = 0; // Reset counter | |||
| // PWM Period | |||
| // 16-bit maximum | |||
| FTM0_MOD = 0xFFFF; | |||
| // Set FTM to PWM output - Edge Aligned, Low-true pulses | |||
| FTM0_C0SC = 0x24; // MSnB:MSnA = 10, ELSnB:ELSnA = 01 | |||
| FTM0_C1SC = 0x24; | |||
| FTM0_C2SC = 0x24; | |||
| // Base FTM clock selection (72 MHz system clock) | |||
| // 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 | |||
| // 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); | |||
| // Green | |||
| FTM0_C1V = STLcdBacklightGreen_define; | |||
| PORTC_PCR2 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(4); | |||
| // Blue | |||
| FTM0_C2V = STLcdBacklightBlue_define; | |||
| PORTC_PCR3 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(4); | |||
| } | |||