stmhal: Enable machine.time_pulse_us() function.

Author: dpgeorge

stmhal/modmachine.c

@@ -31,6 +31,7 @@
 #include "py/runtime.h"
 #include "py/mphal.h"
 #include "extmod/machine_mem.h"
+#include "extmod/machine_pulse.h"
 #include "extmod/machine_i2c.h"
 #include "lib/fatfs/ff.h"
 #include "lib/fatfs/diskio.h"
@@ -517,6 +518,8 @@ STATIC const mp_map_elem_t machine_module_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_disable_irq),         (mp_obj_t)&pyb_disable_irq_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_enable_irq),          (mp_obj_t)&pyb_enable_irq_obj },
 
+    { MP_OBJ_NEW_QSTR(MP_QSTR_time_pulse_us),       (mp_obj_t)&machine_time_pulse_us_obj },
+
     { MP_ROM_QSTR(MP_QSTR_mem8),                    (mp_obj_t)&machine_mem8_obj },
     { MP_ROM_QSTR(MP_QSTR_mem16),                   (mp_obj_t)&machine_mem16_obj },
     { MP_ROM_QSTR(MP_QSTR_mem32),                   (mp_obj_t)&machine_mem32_obj },

stmhal/mpconfigport.h

@@ -95,6 +95,7 @@
 #define MICROPY_PY_UHEAPQ           (1)
 #define MICROPY_PY_UHASHLIB         (1)
 #define MICROPY_PY_MACHINE          (1)
+#define MICROPY_PY_MACHINE_PULSE    (1)
 #define MICROPY_PY_MACHINE_I2C      (1)
 #define MICROPY_PY_MACHINE_SPI      (1)
 #define MICROPY_PY_MACHINE_SPI_MIN_DELAY (0)

stmhal/mphalport.h

@@ -34,12 +34,12 @@ extern const unsigned char mp_hal_status_to_errno_table[4];
 NORETURN void mp_hal_raise(HAL_StatusTypeDef status);
 void mp_hal_set_interrupt_char(int c); // -1 to disable
 
-#define mp_hal_delay_ms HAL_Delay
-#define mp_hal_ticks_ms HAL_GetTick
-
-// needed for machine.I2C
+// timing functions
 #include "stmhal/systick.h"
+#define mp_hal_delay_ms HAL_Delay
 #define mp_hal_delay_us_fast(us) sys_tick_udelay(us)
+#define mp_hal_ticks_ms HAL_GetTick
+#define mp_hal_ticks_us() sys_tick_get_microseconds()
 
 // C-level pin HAL
 #include "stmhal/pin.h"