Add basic thermal printer control

src/pinning.h

@@ -0,0 +1,23 @@
+#pragma once
+
+// Port A
+#define PIN_STEPPER_AP          0   // PA0  - Stepper phase A positive
+#define PIN_STEPPER_BP          1   // PA1  - Stepper phase B positive
+#define PIN_HEAD                2   // PA2  - Head up sensor
+#define PIN_PAPER               3   // PA3  - Paper detect
+#define PIN_STEPPER_AM          4   // PA4  - Stepper phase A negative
+#define PIN_STEPPER_BM          5   // PA5  - Stepper phase B negative
+
+#define PIN_USB_DM              11  // PA11 - USB D-
+#define PIN_USB_DP              12  // PA12 - USB D+
+
+// Port B
+#define PIN_THERMISTOR          0   // PB0  - Thermistor
+#define PIN_DST1                10  // PB10 - Head drive signal 1 (TIM2_CH3)
+#define PIN_DST2                11  // PB11 - Head drive signal 2 (TIM2_CH4)
+#define PIN_SCK                 13  // PB13 - Thermal printer SCK (SPI2)
+#define PIN_LATCH               14  // PB14 - Thermal printer data latch
+#define PIN_DIN                 15  // PB15 - Thermal printer MOSI (SPI2)
+
+// Port C
+#define PIN_LED                 13  // PC13 - Status LED