base of 1wire, need to make async

platform/platform.c

@@ -12,6 +12,7 @@
 #include "units/digital_in/unit_din.h"
 #include "units/neopixel/unit_neopixel.h"
 #include "units/i2c/unit_i2c.h"
+#include "units/1wire/unit_1wire.h"
 #include "units/test/unit_test.h"
 #include "units/usart/unit_usart.h"
 #include "units/spi/unit_spi.h"
@@ -82,6 +83,7 @@ void plat_init_resources(void)
     ureg_add_type(&UNIT_I2C);
     ureg_add_type(&UNIT_SPI);
     ureg_add_type(&UNIT_USART);
+    ureg_add_type(&UNIT_1WIRE);
 
     // Free all present resources
     {

platform/timebase.c

@@ -5,6 +5,8 @@
 #include "platform.h"
 #include "timebase.h"
 
+// ---------------------------- HAL TIMEBASE -----------------------------
+
 #define TIMEBASE_TIMER TIM14
 
 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
@@ -67,9 +69,8 @@ void HAL_ResumeTick(void)
     LL_TIM_EnableIT_UPDATE(TIMEBASE_TIMER);
 }
 
-// -------------------------------------------------------------------------------------
 
-// Timestamping functions ...
+// -------------------------- DELAY FUNCTIONS AND TS -----------------------------
 
 /*
  * I wanted to freeze time. I wanted to savor that moment, to live in that moment
@@ -96,3 +97,15 @@ uint64_t PTIM_GetMicrotime(void)
 
     return (uint64_t)uwMillis*1000 + uwMicros;
 }
+
+/** microsecond delay */
+void PTIM_MicroDelay(uint16_t usec)
+{
+    usec++; // rounding up
+    assert_param(usec < 1000);
+
+    uint16_t end = (uint16_t) (TIMEBASE_TIMER->CNT + usec);
+    if (end > 999) end -= 1000;
+
+    while (TIMEBASE_TIMER->CNT != end);
+}

platform/timebase.h

@@ -21,4 +21,11 @@
  */
 uint64_t PTIM_GetMicrotime(void);
 
+/**
+ * Microseconds busy delay
+ *
+ * @param usec - max 998
+ */
+void PTIM_MicroDelay(uint16_t usec);
+
 #endif //GEX_F072_TIMEBASE_H