Delete lcd_backlight_hal.c

The functionality can now be found in the infinity_erogodox.c file
instead.

keyboards/infinity_ergodox/infinity_ergodox.c

@@ -2,10 +2,75 @@
 #include "ch.h"
 #include "hal.h"
 #include "serial_link/system/serial_link.h"
+#include "lcd_backlight.h"
 
 void init_serial_link_hal(void) {
     PORTA->PCR[1] = PORTx_PCRn_PE | PORTx_PCRn_PS | PORTx_PCRn_PFE | PORTx_PCRn_MUX(2);
     PORTA->PCR[2] = PORTx_PCRn_DSE | PORTx_PCRn_SRE | PORTx_PCRn_MUX(2);
     PORTE->PCR[0] = PORTx_PCRn_PE | PORTx_PCRn_PS | PORTx_PCRn_PFE | PORTx_PCRn_MUX(3);
     PORTE->PCR[1] = PORTx_PCRn_DSE | PORTx_PCRn_SRE | PORTx_PCRn_MUX(3);
 }
+
+#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;
+}

quantum/visualizer/visualizer.mk

@@ -34,9 +34,6 @@ endif
 
 ifdef LCD_BACKLIGHT_ENABLE
 SRC += $(VISUALIZER_DIR)/lcd_backlight.c
-ifndef EMULATOR
-SRC += lcd_backlight_hal.c
-endif
 OPT_DEFS += -DLCD_BACKLIGHT_ENABLE
 endif