1 #include "infinity_ergodox.h"
4 #include "serial_link/system/serial_link.h"
5 #include "lcd_backlight.h"
7 void init_serial_link_hal(void) {
8 PORTA->PCR[1] = PORTx_PCRn_PE | PORTx_PCRn_PS | PORTx_PCRn_PFE | PORTx_PCRn_MUX(2);
9 PORTA->PCR[2] = PORTx_PCRn_DSE | PORTx_PCRn_SRE | PORTx_PCRn_MUX(2);
10 PORTE->PCR[0] = PORTx_PCRn_PE | PORTx_PCRn_PS | PORTx_PCRn_PFE | PORTx_PCRn_MUX(3);
11 PORTE->PCR[1] = PORTx_PCRn_DSE | PORTx_PCRn_SRE | PORTx_PCRn_MUX(3);
17 #define CHANNEL_RED FTM0->CHANNEL[0]
18 #define CHANNEL_GREEN FTM0->CHANNEL[1]
19 #define CHANNEL_BLUE FTM0->CHANNEL[2]
21 #define RGB_PORT PORTC
22 #define RGB_PORT_GPIO GPIOC
24 // Base FTM clock selection (72 MHz system clock)
25 // @ 0xFFFF period, 72 MHz / (0xFFFF * 2) = Actual period
26 // Higher pre-scalar will use the most power (also look the best)
27 // Pre-scalar calculations
28 // 0 - 72 MHz -> 549 Hz
29 // 1 - 36 MHz -> 275 Hz
30 // 2 - 18 MHz -> 137 Hz
31 // 3 - 9 MHz -> 69 Hz (Slightly visible flicker)
32 // 4 - 4 500 kHz -> 34 Hz (Visible flickering)
33 // 5 - 2 250 kHz -> 17 Hz
34 // 6 - 1 125 kHz -> 9 Hz
35 // 7 - 562 500 Hz -> 4 Hz
36 // Using a higher pre-scalar without flicker is possible but FTM0_MOD will need to be reduced
37 // Which will reduce the brightness range
38 #define PRESCALAR_DEFINE 0
40 void lcd_backlight_hal_init(void) {
42 SIM->SCGC6 |= SIM_SCGC6_FTM0;
43 FTM0->CNT = 0; // Reset counter
49 // Set FTM to PWM output - Edge Aligned, Low-true pulses
50 #define CNSC_MODE FTM_SC_CPWMS | FTM_SC_PS(4) | FTM_SC_CLKS(0)
51 CHANNEL_RED.CnSC = CNSC_MODE;
52 CHANNEL_GREEN.CnSC = CNSC_MODE;
53 CHANNEL_BLUE.CnSC = CNSC_MODE;
55 // System clock, /w prescalar setting
56 FTM0->SC = FTM_SC_CLKS(1) | FTM_SC_PS(PRESCALAR_DEFINE);
59 CHANNEL_GREEN.CnV = 0;
62 RGB_PORT_GPIO->PDDR |= (1 << RED_PIN);
63 RGB_PORT_GPIO->PDDR |= (1 << GREEN_PIN);
64 RGB_PORT_GPIO->PDDR |= (1 << BLUE_PIN);
66 #define RGB_MODE PORTx_PCRn_SRE | PORTx_PCRn_DSE | PORTx_PCRn_MUX(4)
67 RGB_PORT->PCR[RED_PIN] = RGB_MODE;
68 RGB_PORT->PCR[GREEN_PIN] = RGB_MODE;
69 RGB_PORT->PCR[BLUE_PIN] = RGB_MODE;
72 void lcd_backlight_hal_color(uint16_t r, uint16_t g, uint16_t b) {
74 CHANNEL_GREEN.CnV = g;