Merge from main branch

1 files changed, 103 insertions, 0 deletions

diff --git a/hwdef-gchart-fet1-t1616.h b/hwdef-gchart-fet1-t1616.h
new file mode 100644
index 0000000..365ecd7
--- /dev/null
+++ b/hwdef-gchart-fet1-t1616.h
@@ -0,0 +1,103 @@
+#ifndef HWDEF_GCH_FET1_T1616_H
+#define HWDEF_GCH_FET1_T1616_H
+
+/* gChart's custom FET+1 driver layout
+
+PB0 - PWM for FET (TCA - WO0)
+PB1 - PWM for 7135 (TCA - WO1)
+PB2 - Switch pin, internal pullup
+PB3 - Aux LED with 4700 Ohm series resistor
+Read voltage from VCC pin, has diode with ~0.4v drop
+
+*/
+
+
+#define LAYOUT_DEFINED
+
+#ifdef ATTINY
+#undef ATTINY
+#endif
+#define ATTINY 1616
+#include <avr/io.h>
+
+#define PWM_CHANNELS 2
+
+#ifndef SWITCH_PIN
+#define SWITCH_PIN     PIN2_bp
+#define SWITCH_PORT    VPORTB.IN
+#define SWITCH_ISC_REG PORTB.PIN2CTRL
+#define SWITCH_VECT    PORTB_PORT_vect
+#define SWITCH_INTFLG  VPORTB.INTFLAGS
+#endif
+
+
+// 7135 channel
+#ifndef PWM1_PIN
+#define PWM1_PIN PB1               //
+#define PWM1_LVL TCA0.SINGLE.CMP1  // CMP1 is the output compare register for PB1
+#endif
+
+// FET channel
+#ifndef PWM2_PIN
+#define PWM2_PIN PB0               //
+#define PWM2_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 8  // 4 = add 0.20V
+#endif
+
+
+// lighted button
+#ifndef AUXLED_PIN
+#define AUXLED_PIN  PIN3_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 = 0b00000010;
+    VPORTB.DIR = PIN0_bm | PIN1_bm | PIN3_bm;
+    //VPORTC.DIR = 0b00000000;
+
+    // enable pullups on the input 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;
+    PORTA.PIN6CTRL = PORT_PULLUPEN_bm;
+    PORTA.PIN7CTRL = PORT_PULLUPEN_bm;
+
+    //PORTB.PIN0CTRL = PORT_PULLUPEN_bm; // FET channel
+    //PORTB.PIN1CTRL = PORT_PULLUPEN_bm; // 7135 channel
+    PORTB.PIN2CTRL = PORT_PULLUPEN_bm | PORT_ISC_BOTHEDGES_gc;  // switch
+    //PORTB.PIN3CTRL = PORT_PULLUPEN_bm; // Aux LED
+    PORTB.PIN4CTRL = PORT_PULLUPEN_bm;
+    PORTB.PIN5CTRL = PORT_PULLUPEN_bm;
+
+    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
+    // TODO: measure 5 MHz fast PWM vs 10 MHz phase-correct, to see if it
+    //       still has issues at 0/255 and 255/255 like older models did
+    //       (and maybe switch to phase-correct@10MHz)
+    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