From 801d9a5abcd912d81d3a6a95e8cc22635fced3ef Mon Sep 17 00:00:00 2001
From: Scott Shawcroft <scott@tannewt.org>
Date: Fri, 7 Dec 2018 16:11:21 -0800
Subject: Fix running the USB task on nRF.

It wasn't being run due to a rework done only on the atmel-samd port.
The rework itself isn't needed now that the heap check triggers safe
mode instead of throwing a Python exception. So, I've removed the
rework.
---
 main.c                          | 4 ++--
 ports/atmel-samd/background.c   | 8 ++------
 ports/atmel-samd/mpconfigport.h | 6 ++----
 ports/nrf/background.c          | 3 +++
 4 files changed, 9 insertions(+), 12 deletions(-)

diff --git a/main.c b/main.c
index aac2c5566..4e0b77cfd 100755
--- a/main.c
+++ b/main.c
@@ -215,8 +215,8 @@ bool run_code_py(safe_mode_t safe_mode) {
     rgb_status_animation_t animation;
     prep_rgb_status_animation(&result, found_main, safe_mode, &animation);
     while (true) {
-        #ifdef CIRCUITPY_SUPERVISOR_BACKGROUND
-            CIRCUITPY_SUPERVISOR_BACKGROUND
+        #ifdef MICROPY_VM_HOOK_LOOP
+            MICROPY_VM_HOOK_LOOP
         #endif
         if (reload_requested) {
             return true;
diff --git a/ports/atmel-samd/background.c b/ports/atmel-samd/background.c
index 94763bc43..439877d2e 100644
--- a/ports/atmel-samd/background.c
+++ b/ports/atmel-samd/background.c
@@ -39,6 +39,7 @@ volatile uint64_t last_finished_tick = 0;
 bool stack_ok_so_far = true;
 
 void run_background_tasks(void) {
+    assert_heap_ok();
     #if (defined(SAMD21) && defined(PIN_PA02)) || defined(SAMD51)
     audio_dma_background();
     #endif
@@ -50,16 +51,11 @@ void run_background_tasks(void) {
     network_module_background();
     #endif
     usb_background();
+    assert_heap_ok();
 
     last_finished_tick = ticks_ms;
 }
 
-void run_background_vm_tasks(void) {
-    assert_heap_ok();
-    run_background_tasks();
-    assert_heap_ok();
-}
-
 bool background_tasks_ok(void) {
     return ticks_ms - last_finished_tick < 1000;
 }
diff --git a/ports/atmel-samd/mpconfigport.h b/ports/atmel-samd/mpconfigport.h
index 4fc32157c..d0ebbfa39 100644
--- a/ports/atmel-samd/mpconfigport.h
+++ b/ports/atmel-samd/mpconfigport.h
@@ -451,10 +451,8 @@ extern const struct _mp_obj_module_t wiznet_module;
     NETWORK_ROOT_POINTERS \
 
 void run_background_tasks(void);
-void run_background_vm_tasks(void);
-#define MICROPY_VM_HOOK_LOOP run_background_vm_tasks();
-#define MICROPY_VM_HOOK_RETURN run_background_vm_tasks();
-#define CIRCUITPY_SUPERVISOR_BACKGROUND run_background_tasks();
+#define MICROPY_VM_HOOK_LOOP run_background_tasks();
+#define MICROPY_VM_HOOK_RETURN run_background_tasks();
 
 #define CIRCUITPY_AUTORELOAD_DELAY_MS 500
 #define CIRCUITPY_BOOT_OUTPUT_FILE "/boot_out.txt"
diff --git a/ports/nrf/background.c b/ports/nrf/background.c
index f614b6bd0..f022b5bc9 100644
--- a/ports/nrf/background.c
+++ b/ports/nrf/background.c
@@ -28,8 +28,11 @@
 #include "supervisor/usb.h"
 #endif
 
+#include "supervisor/shared/stack.h"
+
 void run_background_tasks(void) {
     #ifdef NRF52840
         usb_background();
     #endif
+    assert_heap_ok();
 }
-- 
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