diff options
Diffstat (limited to 'quantum/visualizer/example_integration/lcd_backlight_hal.c')
| -rw-r--r-- | quantum/visualizer/example_integration/lcd_backlight_hal.c | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/quantum/visualizer/example_integration/lcd_backlight_hal.c b/quantum/visualizer/example_integration/lcd_backlight_hal.c deleted file mode 100644 index 913131b16..000000000 --- a/quantum/visualizer/example_integration/lcd_backlight_hal.c +++ /dev/null @@ -1,91 +0,0 @@ -/* -The MIT License (MIT) - -Copyright (c) 2016 Fred Sundvik - -Permission is hereby granted, free of charge, to any person obtaining a copy -of this software and associated documentation files (the "Software"), to deal -in the Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -copies of the Software, and to permit persons to whom the Software is -furnished to do so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. -*/ - -#include "lcd_backlight.h" -#include "hal.h" - -#define RED_PIN 1 -#define GREEN_PIN 2 -#define BLUE_PIN 3 -#define CHANNEL_RED FTM0->CHANNEL[0] -#define CHANNEL_GREEN FTM0->CHANNEL[1] -#define CHANNEL_BLUE FTM0->CHANNEL[2] - -#define RGB_PORT PORTC -#define RGB_PORT_GPIO GPIOC - -// 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 -// Using a higher pre-scalar without flicker is possible but FTM0_MOD will need to be reduced -// Which will reduce the brightness range -#define PRESCALAR_DEFINE 0 - -void lcd_backlight_hal_init(void) { - // Setup Backlight - 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 -#define CNSC_MODE FTM_SC_CPWMS | FTM_SC_PS(4) | FTM_SC_CLKS(0) - CHANNEL_RED.CnSC = CNSC_MODE; - CHANNEL_GREEN.CnSC = CNSC_MODE; - CHANNEL_BLUE.CnSC = CNSC_MODE; - - // System clock, /w prescalar setting - FTM0->SC = FTM_SC_CLKS(1) | FTM_SC_PS(PRESCALAR_DEFINE); - - CHANNEL_RED.CnV = 0; - CHANNEL_GREEN.CnV = 0; - CHANNEL_BLUE.CnV = 0; - - RGB_PORT_GPIO->PDDR |= (1 << RED_PIN); - RGB_PORT_GPIO->PDDR |= (1 << GREEN_PIN); - RGB_PORT_GPIO->PDDR |= (1 << BLUE_PIN); - -#define RGB_MODE PORTx_PCRn_SRE | PORTx_PCRn_DSE | PORTx_PCRn_MUX(4) - RGB_PORT->PCR[RED_PIN] = RGB_MODE; - RGB_PORT->PCR[GREEN_PIN] = RGB_MODE; - RGB_PORT->PCR[BLUE_PIN] = RGB_MODE; -} - -void lcd_backlight_hal_color(uint16_t r, uint16_t g, uint16_t b) { - CHANNEL_RED.CnV = r; - CHANNEL_GREEN.CnV = g; - CHANNEL_BLUE.CnV = b; -} - |