1 files changed, 61 insertions, 0 deletions
diff --git a/system-clock/clock.h b/system-clock/clock.h
new file mode 100644
index 0000000..2ba6880
--- /dev/null
+++ b/system-clock/clock.h
@@ -0,0 +1,61 @@
+#ifndef CLOCK_H__
+#define CLOCK_H__
+
+#include <stdint.h>
+
+#define PERIPH_BASE    ((uint32_t)       0x40000000)
+#define AHBPERIPH_BASE (PERIPH_BASE +    0x00020000)
+#define RCC_BASE       (AHBPERIPH_BASE + 0x00001000)
+#define FLASH_R_BASE   (AHBPERIPH_BASE + 0x00003C00)
+#define PWR_BASE       (PERIPH_BASE + 0x7000)
+#define  PWR_CSR_VOSF                        ((uint16_t)0x0010)     /*!< Voltage Scaling select flag */
+
+
+#ifndef __IO
+#define __IO volatile
+#endif
+
+typedef struct {
+  __IO uint32_t cr;
+  __IO uint32_t csr;
+} pwr_t;
+
+typedef struct {
+  __IO uint32_t acr;
+  __IO uint32_t pecr;
+  __IO uint32_t pdkeyr;
+  __IO uint32_t pekeyr;
+  __IO uint32_t prgkeyr;
+  __IO uint32_t optkeyr;
+  __IO uint32_t sr;
+  __IO uint32_t obr;
+  __IO uint32_t wrpr;       
+} flash_t;
+
+typedef struct {
+  __IO uint32_t cr;
+  __IO uint32_t icscr;
+  __IO uint32_t cfgr;
+  __IO uint32_t cir;
+  __IO uint32_t ahbrstr;
+  __IO uint32_t apb2rstr;
+  __IO uint32_t apb1rstr;
+  __IO uint32_t ahbenr;
+  __IO uint32_t apb2enr;
+  __IO uint32_t apb1enr;
+  __IO uint32_t ahblpenr;
+  __IO uint32_t apb2lpenr;
+  __IO uint32_t apb1lpenr;      
+  __IO uint32_t csr;    
+} rcc_t;
+
+#define RCC (*(rcc_t*) (RCC_BASE))
+#define FLASH (*(flash_t*) (FLASH_R_BASE))
+#define PWR (*(pwr_t*) (PWR_BASE))
+
+/*
+ * Sets the system clock to a full 80Mhz.
+ */
+int set_sys_clock();
+
+#endif /* CLOCK_H__ */