From effd2fd66f3f67e42a3fc8c0e3c7a82f30dc2e44 Mon Sep 17 00:00:00 2001
From: Marti Bolivar <mbolivar@leaflabs.com>
Date: Mon, 21 Mar 2011 04:21:12 -0400
Subject: More convenient bit-banding interface

---
 libmaple/bitband.h | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/libmaple/bitband.h b/libmaple/bitband.h
index b817f73..3e02702 100644
--- a/libmaple/bitband.h
+++ b/libmaple/bitband.h
@@ -47,6 +47,26 @@ static inline __io uint32* bb_sramp(__io void *address, uint32 bit) {
     return __bb_addr(address, bit, BB_SRAM_BASE, BB_SRAM_REF);
 }
 
+/**
+ * @brief Get a bit from an address in the SRAM bit-band region.
+ * @param address Address in the SRAM bit-band region to read from
+ * @param bit Bit in address to read
+ * @return bit's value in address.
+ */
+static inline uint8 bb_sram_get_bit(__io void *address, uint32 bit) {
+    return *bb_sramp(address, bit);
+}
+
+/**
+ * @brief Set a bit in an address in the SRAM bit-band region.
+ * @param address Address in the SRAM bit-band region to write to
+ * @param bit Bit in address to write to
+ * @param val Value to write for bit, either 0 or 1.
+ */
+static inline void bb_sram_set_bit(__io void *address, uint32 bit, uint8 val) {
+    *bb_sramp(address, bit) = val;
+}
+
 /**
  * @brief Obtain a pointer to the bit-band address corresponding to a
  * bit in a peripheral address.
@@ -57,6 +77,26 @@ static inline __io uint32* bb_perip(__io void *address, uint32 bit) {
     return __bb_addr(address, bit, BB_PERI_BASE, BB_PERI_REF);
 }
 
+/**
+ * @brief Get a bit from an address in the peripheral bit-band region.
+ * @param address Address in the peripheral bit-band region to read from
+ * @param bit Bit in address to read
+ * @return bit's value in address.
+ */
+static inline uint8 bb_peri_get_bit(__io void *address, uint32 bit) {
+    return *bb_perip(address, bit);
+}
+
+/**
+ * @brief Set a bit in an address in the peripheral bit-band region.
+ * @param address Address in the peripheral bit-band region to write to
+ * @param bit Bit in address to write to
+ * @param val Value to write for bit, either 0 or 1.
+ */
+static inline void bb_peri_set_bit(__io void *address, uint32 bit, uint8 val) {
+    *bb_perip(address, bit) = val;
+}
+
 static inline __io uint32* __bb_addr(__io void *address,
                                      uint32 bit,
                                      uint32 bb_base,
-- 
cgit v1.2.3