diff options
Diffstat (limited to 'keyboards/infinity_ergodox/infinity_ergodox.c')
| -rw-r--r-- | keyboards/infinity_ergodox/infinity_ergodox.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/keyboards/infinity_ergodox/infinity_ergodox.c b/keyboards/infinity_ergodox/infinity_ergodox.c index 85054775e8..87ed40fabf 100644 --- a/keyboards/infinity_ergodox/infinity_ergodox.c +++ b/keyboards/infinity_ergodox/infinity_ergodox.c @@ -2,6 +2,7 @@ #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); @@ -9,3 +10,67 @@ void init_serial_link_hal(void) { 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; +} |