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-rw-r--r--libmaple/i2c.h2
-rw-r--r--libmaple/ring_buffer.h6
-rw-r--r--libmaple/systick.c2
-rw-r--r--libmaple/systick.h2
-rw-r--r--libmaple/util.h4
5 files changed, 9 insertions, 7 deletions
diff --git a/libmaple/i2c.h b/libmaple/i2c.h
index 21c17c1..a17e144 100644
--- a/libmaple/i2c.h
+++ b/libmaple/i2c.h
@@ -66,7 +66,7 @@ typedef struct i2c_dev {
uint8 clk_line;
uint8 ev_nvic_line;
uint8 er_nvic_line;
- volatile uint8 state;
+ __io uint8 state;
uint16 msgs_left;
i2c_msg *msg;
} i2c_dev;
diff --git a/libmaple/ring_buffer.h b/libmaple/ring_buffer.h
index ad6ad96..04f6499 100644
--- a/libmaple/ring_buffer.h
+++ b/libmaple/ring_buffer.h
@@ -35,6 +35,8 @@
#ifndef _RING_BUFFER_H_
#define _RING_BUFFER_H_
+#include "libmaple_types.h"
+
#ifdef __cplusplus
extern "C"{
#endif
@@ -49,7 +51,7 @@ extern "C"{
*
* One byte is left free to distinguish empty from full. */
typedef struct ring_buffer {
- volatile uint8 *buf; /**< Buffer items are stored into */
+ __io uint8 *buf; /**< Buffer items are stored into */
uint16 head; /**< Index of the next item to remove */
uint16 tail; /**< Index where the next item will get inserted */
uint16 size; /**< Buffer capacity minus one */
@@ -79,7 +81,7 @@ static inline void rb_init(ring_buffer *rb, uint16 size, uint8 *buf) {
* @param rb Buffer whose elements to count.
*/
static inline uint16 rb_full_count(ring_buffer *rb) {
- volatile ring_buffer *arb = rb;
+ __io ring_buffer *arb = rb;
int32 size = arb->tail - arb->head;
if (arb->tail < arb->head) {
size += arb->size + 1;
diff --git a/libmaple/systick.c b/libmaple/systick.c
index c04f4f3..103893e 100644
--- a/libmaple/systick.c
+++ b/libmaple/systick.c
@@ -28,7 +28,7 @@
#include "systick.h"
-volatile uint32 systick_timer_millis;
+__io uint32 systick_timer_millis;
/**
* @brief Initialize and enable SysTick.
diff --git a/libmaple/systick.h b/libmaple/systick.h
index 35b4cb9..4654c5f 100644
--- a/libmaple/systick.h
+++ b/libmaple/systick.h
@@ -73,7 +73,7 @@ typedef struct systick_reg_map {
#define SYSTICK_CVR_TENMS 0xFFFFFF
/** System elapsed time, in milliseconds */
-extern volatile uint32 systick_timer_millis;
+extern __io uint32 systick_timer_millis;
void systick_init(uint32 reload_val);
void systick_disable();
diff --git a/libmaple/util.h b/libmaple/util.h
index aff70e1..4c47764 100644
--- a/libmaple/util.h
+++ b/libmaple/util.h
@@ -50,8 +50,8 @@ extern "C"{
* Register reads and writes
*/
-#define __read(reg) (*(volatile uint32*)(reg))
-#define __write(reg, value) (*(volatile uint32*)(reg) = (value))
+#define __read(reg) (*(__io uint32*)(reg))
+#define __write(reg, value) (*(__io uint32*)(reg) = (value))
/*
* Failure routines