wip on stepper movement

some bug occurs on reversiong direction when declining in position

Inc/stepper.h

@@ -0,0 +1,22 @@
+#include "stm32g0b1xx.h"
+
+typedef struct {
+    GPIO_TypeDef* en_port;
+    uint8_t en_pin;
+    GPIO_TypeDef* dir_port;
+    uint8_t dir_pin;
+    GPIO_TypeDef* step_port;
+    uint8_t step_pin;
+    GPIO_TypeDef* home_port;
+    uint8_t home_pin;
+    uint8_t homed:1;
+    uint8_t moving:1;
+    int16_t pos;
+    int16_t speed;
+    int16_t ramp_to_speed;
+    uint32_t next_step;
+} stepper_T;
+  
+void Timer1_Init(void);
+void stepper_gpio_init();
+void do_steps();

Inc/uart_dmx.h

@@ -0,0 +1,9 @@
+#include "stm32g0b1xx.h"
+
+#define BUFFER_SIZE 515
+
+extern uint8_t rxBuffer[BUFFER_SIZE];
+extern uint16_t rxBufferPos;
+
+void init_UART1_it();
+void init_UART1_dma();