Add Sofirn SP10S (adapter) and dual-voltage logic

1 files changed, 124 insertions, 0 deletions

diff --git a/hwdef-Sofirn-SP10S.h b/hwdef-Sofirn-SP10S.h
new file mode 100644
index 0000000..4e33246
--- /dev/null
+++ b/hwdef-Sofirn-SP10S.h
@@ -0,0 +1,124 @@
+#ifndef HWDEF_SOFIRN_SP10S_H
+#define HWDEF_SOFIRN_SP10S_H
+
+/* gChart's PIC12 to ATTINY1616 v1 adapter for the SP10S
+https://oshpark.com/shared_projects/rljCF1NN
+
+EDIT: modify the PCB, cutting the Pin 6 trace and use an airwire to route it to SOIC Pin 2 (PA5)
+NOTE: a v2 (no airwire) is on the way and this HWDEF file will need to be updated accordingly
+
+PIC12 Pinout:
+1 - VDD
+2 - No Connect
+3 - Low Channel FET (series 4.7K Ohms)
+4 - Switch
+5 - High Channel FET (main PWM)
+6 - Voltage Divider (300K:100K Ohms)
+7 - Boost chip enable
+8 - GND
+
+ATTINY1616 Mapping:
+2 - PA5 : ADC0 - AIN5
+3 - PB5 : TCA0 - WO2 Alternate MUX
+4 - PB4
+5 - PB0 : TCA0 - WO0
+7 - PA1
+
+*/
+
+
+#define LAYOUT_DEFINED
+
+#ifdef ATTINY
+#undef ATTINY
+#endif
+#define ATTINY 1616
+#include <avr/io.h>
+
+#ifndef SWITCH_PIN
+#define SWITCH_PIN     4    
+#define SWITCH_PORT    VPORTB.IN
+#define SWITCH_ISC_REG PORTB.PIN4CTRL
+#define SWITCH_VECT    PORTB_PORT_vect
+#define SWITCH_INTFLG  VPORTB.INTFLAGS
+#endif
+
+#define PWM_CHANNELS 2
+
+// Small channel
+#ifndef PWM1_PIN
+#define PWM1_PIN PB5
+#define PWM1_LVL TCA0.SINGLE.CMP2  // PB5 is Alternate MUX for TCA Compare 2
+#endif
+
+// Big channel
+#ifndef PWM2_PIN
+#define PWM2_PIN PB0
+#define PWM2_LVL TCA0.SINGLE.CMP0  // PB0 is TCA Compare 0
+#endif
+
+#define LED_ENABLE_PIN   PIN1_bp
+#define LED_ENABLE_PORT  PORTA_OUT
+
+#define USE_VOLTAGE_DIVIDER       // use a dedicated pin, not VCC, because VCC input is flattened
+#define DUAL_VOLTAGE_FLOOR    20  // for AA/14500 boost drivers, don't indicate low voltage if below this level
+#define DUAL_VOLTAGE_LOW_LOW  07  // the lower voltage range's danger zone 0.7 volts
+#define ADMUX_VOLTAGE_DIVIDER ADC_MUXPOS_AIN5_gc  // which ADC channel to read
+
+// Raw ADC readings at 4.4V and 2.2V
+// calibrate the voltage readout here
+// estimated / calculated values are:
+//   (voltage - D1) * (R2/(R2+R1) * 1024 / 1.1)
+// Resistors are 300,000 and 100,000
+#ifndef ADC_44
+#define ADC_44 1023  // raw value at 4.40V
+#endif
+#ifndef ADC_22
+#define ADC_22 512  // raw value at 2.20V
+#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 = PIN1_bm;  // Boost enable pin
+    VPORTB.DIR = PIN0_bm | PIN5_bm;  // PWM pins as output
+    //VPORTC.DIR = ...;
+
+
+    // enable pullups on the input pins to reduce power
+    PORTA.PIN0CTRL = PORT_PULLUPEN_bm;
+    //PORTA.PIN1CTRL = PORT_PULLUPEN_bm; // Boost enable pin
+    PORTA.PIN2CTRL = PORT_PULLUPEN_bm;
+    PORTA.PIN3CTRL = PORT_PULLUPEN_bm;
+    PORTA.PIN4CTRL = PORT_PULLUPEN_bm;
+    //PORTA.PIN5CTRL = PORT_PULLUPEN_bm; // Voltage divider
+    PORTA.PIN6CTRL = PORT_PULLUPEN_bm;
+    PORTA.PIN7CTRL = PORT_PULLUPEN_bm;
+    
+    //PORTB.PIN0CTRL = PORT_PULLUPEN_bm; // Big PWM channel
+    PORTB.PIN1CTRL = PORT_PULLUPEN_bm;
+    PORTB.PIN2CTRL = PORT_PULLUPEN_bm;
+    PORTB.PIN3CTRL = PORT_PULLUPEN_bm;
+    PORTB.PIN4CTRL = PORT_PULLUPEN_bm | PORT_ISC_BOTHEDGES_gc;  // Switch
+    //PORTB.PIN5CTRL = PORT_PULLUPEN_bm; // Small PWM channel
+    
+    //PORTC.PIN0CTRL = PORT_PULLUPEN_bm; connected to the ADC via airwire
+    PORTC.PIN1CTRL = PORT_PULLUPEN_bm;
+    PORTC.PIN2CTRL = PORT_PULLUPEN_bm;
+    PORTC.PIN3CTRL = PORT_PULLUPEN_bm;
+  
+  	// set up the PWM
+  	PORTMUX.CTRLC = PORTMUX_TCA02_ALTERNATE_gc;  // Use alternate pin for TCA0:WO2
+    TCA0.SINGLE.CTRLB = TCA_SINGLE_CMP0EN_bm | TCA_SINGLE_CMP2EN_bm | TCA_SINGLE_WGMODE_SINGLESLOPE_gc;
+    TCA0.SINGLE.PER = 255;
+    TCA0.SINGLE.CTRLA = TCA_SINGLE_CLKSEL_DIV1_gc | TCA_SINGLE_ENABLE_bm;
+}
+
+
+#endif