basic memory management and uart wait fix

[cortex-from-scratch] / main.c

diff --git a/main.c b/main.c
index 57a199e..84496d5 100644 (file)
--- a/main.c
+++ b/main.c
@@ -1,7 +1,72 @@
-void main(void);
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stm32.h> // <-- your own header file located located in ./include
+#include <mmap.h>
 
-void main(void ) {
 
-       int i = 1;
-       for (;;);
+void *memcpy(void *dest, void *src, size_t count)
+{   
+    const char *sp = (const char *)src;
+    char *dp = (char *)dest;
+    for(; count != 0; count--) *dp++ = *sp++;
+    return dest;
+}
+
+/* fillout memory with 'val' (i.e. all zeroes)
+ */
+void *memset(void *dest, unsigned char val, size_t count)
+{
+    char *temp = (char *)dest;
+    for( ; count != 0; count--) *temp++ = val;
+    return dest;
+}
+
+/* same as above but shorter */
+unsigned short *memsetw(unsigned short *dest, unsigned short val, size_t count)
+{
+    unsigned short *temp = (unsigned short *)dest;
+    for( ; count != 0; count--) *temp++ = val;
+    return dest;
+}
+
+int strlen(const char *str)
+{
+    int retval;
+    for(retval = 0; *str != '\0'; str++) retval++;
+    return retval;
+}
+
+
+
+
+void main()
+{
+
+       ivt_init();
+//     clock_init();
+       uart_init();
+       systick_init();
+       uart_puts("LOADING SYSTEM 0.1 ...\n");
+       sysinfo();
+       mm_init();
+
+       int * p2 = mm_alloc(200);
+       *p2 = 0x12345678;
+
+       test_memory(p2);
+
+       addrtohex(p2);
+       addrtohex(*p2);
+
+
+       //addrtohex((volatile uint32_t) 0x12345678 );
+       //addrtohex((volatile uint32_t) SCB_VTOR );
+
+//     asm("cpsie i"); // enable irq , cpsied f (disable faukts(
+
+       // loop
+       for(;;) {
+
+       }
 }