fix(interrupt): make error values negative

epicardium/api/interrupt-sender.c

@@ -7,7 +7,7 @@ static bool enabled[API_INT_MAX + 1];
 int api_interrupt_trigger(api_int_id_t id)
 {
 	if (id > API_INT_MAX) {
-		return EINVAL;
+		return -EINVAL;
 	}
 
 	if (enabled[id]) {
@@ -32,7 +32,7 @@ void api_interrupt_init(void)
 int epic_interrupt_enable(api_int_id_t int_id)
 {
 	if (int_id > API_INT_MAX) {
-		return EINVAL;
+		return -EINVAL;
 	}
 
 	enabled[int_id] = true;
@@ -42,7 +42,7 @@ int epic_interrupt_enable(api_int_id_t int_id)
 int epic_interrupt_disable(api_int_id_t int_id)
 {
 	if (int_id > API_INT_MAX) {
-		return EINVAL;
+		return -EINVAL;
 	}
 
 	enabled[int_id] = false;

pycardium/mpconfigport.h

@@ -35,6 +35,8 @@
 #define MICROPY_PY_URE_MATCH_SPAN_START_END (1)
 #define MICROPY_PY_URE_SUB                  (1)
 #define MICROPY_PY_UTIME_MP_HAL             (1)
+#define MICROPY_PY_THREAD                           (1)
+#define MICROPY_PY_THREAD_GIL                       (1)
 
 /* Modules */
 #define MODULE_UTIME_ENABLED                (1)