Add K64F reset reason reference implementation

targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_MCU_K64F/reset_reason.c

@@ -0,0 +1,79 @@
+#include "reset_reason_api.h"
+
+#include "fsl_rcm.h"
+
+reset_reason_t hal_reset_reason_get(void)
+{
+    const uint32_t reset_sources =
+        RCM_GetPreviousResetSources(RCM) & kRCM_SourceAll;
+
+    // Check POR flag first. During a POR reset there will be two reset sources
+    // set: POR and LVD. As during the power on phase the low voltage detector
+    // circuit will detect a low voltage while the voltage is initially ramping
+    // up and set the BROWN_OUT flag. Therefore, if LVD is set we must check the
+    // POR to determine what the actual cause was.
+    if ((reset_sources & kRCM_SourcePor) != 0) {
+        return RESET_REASON_POWER_ON;
+    }
+
+    if ((reset_sources & kRCM_SourceLvd) != 0) {
+        return RESET_REASON_BROWN_OUT;
+    }
+
+    if ((reset_sources & kRCM_SourceWdog) != 0) {
+        return RESET_REASON_WATCHDOG;
+    }
+
+    if ((reset_sources & kRCM_SourcePin) != 0) {
+        return RESET_REASON_PIN_RESET;
+    }
+
+    if ((reset_sources & kRCM_SourceSw) != 0) {
+        return RESET_REASON_SOFTWARE;
+    }
+
+#if (defined(FSL_FEATURE_RCM_HAS_LOC) && FSL_FEATURE_RCM_HAS_LOC)
+    if ((reset_sources & kRCM_SourceLoc) != 0) {
+        return RESET_REASON_PLATFORM;
+    }
+#endif
+
+#if (defined(FSL_FEATURE_RCM_HAS_LOL) && FSL_FEATURE_RCM_HAS_LOL)
+    if ((reset_sources & kRCM_SourceLol) != 0) {
+        return RESET_REASON_PLATFORM;
+    }
+#endif
+
+#if (defined(FSL_FEATURE_RCM_HAS_WAKEUP) && FSL_FEATURE_RCM_HAS_WAKEUP)
+    if ((reset_sources & kRCM_SourceWakeup) != 0) {
+        return RESET_REASON_PLATFORM;
+    }
+#endif
+
+#if (defined(FSL_FEATURE_RCM_HAS_JTAG) && FSL_FEATURE_RCM_HAS_JTAG)
+    if ((reset_sources & kRCM_SourceJtag) != 0) {
+        return RESET_REASON_PLATFORM;
+    }
+#endif
+
+#if (defined(FSL_FEATURE_RCM_HAS_MDM_AP) && FSL_FEATURE_RCM_HAS_MDM_AP)
+    if ((reset_sources & kRCM_SourceMdmap) != 0) {
+        return RESET_REASON_PLATFORM;
+    }
+#endif
+
+#if (defined(FSL_FEATURE_RCM_HAS_EZPORT) && FSL_FEATURE_RCM_HAS_EZPORT)
+    if ((reset_sources & kRCM_SourceEzpt) != 0) {
+        return RESET_REASON_PLATFORM;
+    }
+#endif
+
+    return RESET_REASON_UNKNOWN;
+}
+
+void hal_reset_reason_clear(void)
+{
+#if (defined(FSL_FEATURE_RCM_HAS_SSRS) && FSL_FEATURE_RCM_HAS_SSRS)
+    RCM_ClearStickyResetSources(RCM, kRCM_SourceAll);
+#endif
+}