1 files changed, 107 insertions, 0 deletions
diff --git a/hwdef-BLF_LT1-t1616.h b/hwdef-BLF_LT1-t1616.h
new file mode 100644
index 0000000..8e5c58b
--- /dev/null
+++ b/hwdef-BLF_LT1-t1616.h
@@ -0,0 +1,107 @@
+#ifndef HWDEF_BLF_LANTERN_T1616_H
+#define HWDEF_BLF_LANTERN_T1616_H
+
+/* BLF LT1 driver layout using the Attiny1616
+
+Driver pinout:
+ * eSwitch:    PA5
+ * Aux LED:    PB5
+ * PWM FET:    PB0 (TCA0 WO0)
+ * PWM 1x7135: PB1 (TCA0 WO1)
+ * Voltage:    VCC
+
+*/
+
+
+#define LAYOUT_DEFINED
+
+#ifdef ATTINY
+#undef ATTINY
+#endif
+#define ATTINY 1616
+#include <avr/io.h>
+
+#define PWM_CHANNELS 1
+
+#ifndef SWITCH_PIN
+#define SWITCH_PIN     PIN5_bp
+#define SWITCH_PORT    VPORTA.IN
+#define SWITCH_ISC_REG PORTA.PIN2CTRL
+#define SWITCH_VECT    PORTA_PORT_vect
+#define SWITCH_INTFLG  VPORTA.INTFLAGS
+#endif
+
+
+// usually PWM1_LVL would be a hardware register, but we need to abstract
+// it out to a soft brightness value, in order to handle tint ramping
+// (this allows smooth thermal regulation to work, and makes things
+//  otherwise simpler and easier)
+uint8_t PWM1_LVL;
+
+// warm tint channel
+#ifndef PWM1_PIN
+#define PWM1_PIN PB1                //
+#define TINT1_LVL TCA0.SINGLE.CMP1  // CMP1 is the output compare register for PB1
+#endif
+
+// cold tint channel
+#ifndef PWM2_PIN
+#define PWM2_PIN PB0                //
+#define TINT2_LVL TCA0.SINGLE.CMP0  // CMP0 is the output compare register for PB0
+#endif
+
+// average drop across diode on this hardware
+#ifndef VOLTAGE_FUDGE_FACTOR
+#define VOLTAGE_FUDGE_FACTOR 7  // add 0.35V
+#endif
+
+
+// lighted button
+#ifndef AUXLED_PIN
+#define AUXLED_PIN  PIN5_bp
+#define AUXLED_PORT PORTB
+#endif
+
+
+// with so many pins, doing this all with #ifdefs gets awkward...
+// ... so just hardcode it in each hwdef file instead
+inline void hwdef_setup() {
+
+    // set up the system clock to run at 5 MHz instead of the default 3.33 MHz
+    _PROTECTED_WRITE( CLKCTRL.MCLKCTRLB, CLKCTRL_PDIV_4X_gc | CLKCTRL_PEN_bm );
+
+    //VPORTA.DIR = ...;
+    VPORTB.DIR = PIN0_bm | PIN1_bm | PIN5_bm;  // Outputs: Aux LED and PWMs
+    //VPORTC.DIR = ...;
+
+    // enable pullups on the unused pins to reduce power
+    PORTA.PIN0CTRL = PORT_PULLUPEN_bm;
+    PORTA.PIN1CTRL = PORT_PULLUPEN_bm;
+    PORTA.PIN2CTRL = PORT_PULLUPEN_bm;
+    PORTA.PIN3CTRL = PORT_PULLUPEN_bm;
+    PORTA.PIN4CTRL = PORT_PULLUPEN_bm;
+    PORTA.PIN5CTRL = PORT_PULLUPEN_bm | PORT_ISC_BOTHEDGES_gc;  // eSwitch
+    PORTA.PIN6CTRL = PORT_PULLUPEN_bm;
+    PORTA.PIN7CTRL = PORT_PULLUPEN_bm;
+
+    //PORTB.PIN0CTRL = PORT_PULLUPEN_bm; // cold tint channel
+    //PORTB.PIN1CTRL = PORT_PULLUPEN_bm; // warm tint channel
+    PORTB.PIN2CTRL = PORT_PULLUPEN_bm;
+    PORTB.PIN3CTRL = PORT_PULLUPEN_bm;
+    PORTB.PIN4CTRL = PORT_PULLUPEN_bm;
+    //PORTB.PIN5CTRL = PORT_PULLUPEN_bm; // Aux LED
+
+    PORTC.PIN0CTRL = PORT_PULLUPEN_bm;
+    PORTC.PIN1CTRL = PORT_PULLUPEN_bm;
+    PORTC.PIN2CTRL = PORT_PULLUPEN_bm;
+    PORTC.PIN3CTRL = PORT_PULLUPEN_bm;
+
+    // set up the PWM
+    // TODO: add references to MCU documentation
+    TCA0.SINGLE.CTRLB = TCA_SINGLE_CMP0EN_bm | TCA_SINGLE_CMP1EN_bm | TCA_SINGLE_WGMODE_SINGLESLOPE_gc;
+    TCA0.SINGLE.PER = 255;
+    TCA0.SINGLE.CTRLA = TCA_SINGLE_CLKSEL_DIV1_gc | TCA_SINGLE_ENABLE_bm;
+}
+
+
+#endif