Import YEEP-144 library 1.2 sources

Source-only snapshot of the 1.2 release. Drivers/ (the vendored ST HAL and
CMSIS) is excluded at 173 MB; fetch it from STMicroelectronics/STM32CubeH5 to
build.

YEEP144lib/include/YEEP144_DCMotor.h

@@ -0,0 +1,39 @@
+#ifndef __YEEP144_DCMOTOR_H
+#define __YEEP144_DCMOTOR_H
+
+#include <stdint.h>
+
+// Defines
+#define DCMOTOR1 1
+#define DCMOTOR2 2
+#define DCMOTOR3 3
+#define DCMOTOR4 4
+
+#define DCMOTOR_STOP       0 // 0b00
+#define DCMOTOR_CCW        1 // 0b01
+#define DCMOTOR_CW         2 // 0b10
+#define DCMOTOR_SHORTBRAKE 3 // 0b11
+
+#define DCMOTOR_MIN_SPEED 0
+#define DCMOTOR_MAX_SPEED 4095 // This corresponds to the Period of the timer
+
+// Function prototypes
+
+// Init functions
+void YEEP144_DCMotor_Init(void);
+void YEEP144_Encoder1_Init(void);
+void YEEP144_Encoder2_Init(void);
+void YEEP144_Encoder3_Init(void);
+void YEEP144_Encoder4_Init(void);
+
+// Motor functions
+void YEEP144_DCMotor_SetSpeed(uint8_t motor, uint16_t speed);
+void YEEP144_DCMotor_SetDirection(uint8_t motor, uint8_t direction);
+
+// Encoder functions
+uint16_t YEEP144_Encoder1_Get(void);
+uint16_t YEEP144_Encoder2_Get(void);
+uint16_t YEEP144_Encoder3_Get(void);
+uint16_t YEEP144_Encoder4_Get(void);
+
+#endif