review7: add keil-c51 examples

1 files changed, 48 insertions, 7 deletions

diff --git a/tests/projects/embed/c51/hello/src/main.c b/tests/projects/embed/c51/hello/src/main.c
index 2c391f151..296324e0a 100644
--- a/tests/projects/embed/c51/hello/src/main.c
+++ b/tests/projects/embed/c51/hello/src/main.c
@@ -1,9 +1,50 @@
-//
-// Created by DawnManget on 2022/5/10.
-//
 #include <reg52.h>
-sbit light = P0 ^ 3;
-void main() {
-    light = 0;
-    while (1);
+
+#define REP(i, j) for(i = 0; i < j; ++i)
+sbit control = P3 ^ 2;
+
+void delay_ms(unsigned int n) {
+    unsigned int i, j;
+    for (j = n; j > 0; j--)
+        for (i = 112; i > 0; i--);
+}
+
+/*——————宏定义——————*/
+int i;
+
+void set(unsigned int x) {
+    P1 = x;
+    delay_ms(100);
+}
+
+void left_fill() {
+    REP(i, 8) set(0xFF >> i);
+}
+
+void right_fill() {
+    REP(i, 8) set((0xFF >> (7 - i)) ^ 0xFF);
+}
+
+void left_erase() {
+    REP(i, 8) set((0xFF >> (7 - i)));
+}
+
+void right_erase() {
+    REP(i, 8) set((0xFF >> i) ^ 0xFF);
+}
+
+int main() {
+    P1 = 0xFF;
+    P3 = 0xFF;
+    while (1) {
+        if (control == 0) {
+            left_fill();
+            left_erase();
+            right_fill();
+            right_erase();
+        } else {
+            set(0x55);
+            set(0xAA);
+        }
+    }
 }
\ No newline at end of file