From 5bdcd8ad93542743042622db51705098084c5c8c Mon Sep 17 00:00:00 2001
From: Miducc <phamminhduc00025121@gmail.com>
Date: Fri, 23 Jun 2023 09:43:06 +0700
Subject: [PATCH] Delete RAM data and delay function

---
 inc/system_function.h | 12 ++++++++++++
 src/system_function.c | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+)
 create mode 100644 inc/system_function.h
 create mode 100644 src/system_function.c

diff --git a/inc/system_function.h b/inc/system_function.h
new file mode 100644
index 0000000..4356522
--- /dev/null
+++ b/inc/system_function.h
@@ -0,0 +1,12 @@
+#ifndef _SYSTEM_FUNCTION_
+#define _SYSTEM_FUNCTION_
+
+#include "stdint.h"
+
+#define RAM_ADDR_START 0x80
+#define RAM_ADDR_END   0xff
+
+void ram_erase(uint8_t ram_bank);
+void delay(uint16_t count);
+
+#endif
\ No newline at end of file
diff --git a/src/system_function.c b/src/system_function.c
new file mode 100644
index 0000000..0c1dfaf
--- /dev/null
+++ b/src/system_function.c
@@ -0,0 +1,34 @@
+#include "BA45F5250.h"
+#include "stdint.h"
+#include "build-in.h"
+#include "system_function.h"
+#include "macro_define.h"
+
+void ram_erase(uint8_t ram_bank)
+{
+	_mp1h = ram_bank;
+    _mp1l = RAM_ADDR_START;
+    _acc = RAM_ADDR_END - RAM_ADDR_START + 1;
+    while (_acc != 0)
+    {
+        _iar1 = 0;
+        ++_mp1l;
+        _acc--;
+    }
+    
+}
+
+void delay(uint16_t count)
+{
+    uint8_t i;
+    for(i = 0; i < count; i++)
+    {
+        #if _HIRCC_8M
+            GCC_DELAY(9993);
+        #elif _HIRCC_4M
+            GCC_DELAY(4993);
+        #else
+            GCC_DELAY(2493);
+        #endif
+    }
+}
\ No newline at end of file