py/mphal.h: Introduce mp_hal_time_ns and implement on various ports.

This should return a 64-bit value being the number of nanoseconds since
1970/1/1.

Signed-off-by: Damien George <damien@micropython.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/ports/esp32/mphalport.c b/ports/esp32/mphalport.c
index 99548ad62..5e526df66 100644
--- a/ports/esp32/mphalport.c
+++ b/ports/esp32/mphalport.c
@@ -28,6 +28,7 @@
 
 #include <stdio.h>
 #include <string.h>
+#include <sys/time.h>
 
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
@@ -195,6 +196,12 @@ void mp_hal_delay_us(uint32_t us) {
     }
 }
 
+uint64_t mp_hal_time_ns(void) {
+    struct timeval tv;
+    gettimeofday(&tv, NULL);
+    return (uint64_t)tv.tv_sec * 1000000000ULL + (uint64_t)tv.tv_usec * 1000ULL;
+}
+
 // Wake up the main task if it is sleeping
 void mp_hal_wake_main_task_from_isr(void) {
     BaseType_t xHigherPriorityTaskWoken = pdFALSE;