From 869ed39e4c28ebb9813a8b28192d4ca92f72bf22 Mon Sep 17 00:00:00 2001
From: Perry Hung <iperry@alum.mit.edu>
Date: Tue, 30 Mar 2010 22:50:18 -0400
Subject: Removed STM32 flash code, replaced with barebones hacks for now.

At this point, there shouldn't be any STM code being compiled and linked
against. There are still a bunch of STM header includes, though.
---
 libmaple/flash.c | 29 +++++++++++++++++++++++++++++
 libmaple/flash.h | 16 ++++++++++++++++
 libmaple/nvic.c  |  4 +++-
 libmaple/nvic.h  |  2 --
 libmaple/rcc.c   |  6 +++---
 libmaple/usb.h   |  1 -
 6 files changed, 51 insertions(+), 7 deletions(-)
 create mode 100644 libmaple/flash.c
 create mode 100644 libmaple/flash.h

(limited to 'libmaple')

diff --git a/libmaple/flash.c b/libmaple/flash.c
new file mode 100644
index 0000000..a3ee26b
--- /dev/null
+++ b/libmaple/flash.c
@@ -0,0 +1,29 @@
+#include "libmaple.h"
+#include "flash.h"
+
+#define ACR_PRFTBE                ((uint32)0xFFFFFFEF)
+#define ACR_PRFTBE_ENABLE ((uint32)0x00000010)  /* FLASH Prefetch Buffer Enable */
+#define ACR_PRFTBE_DISABLE ((uint32)0x00000000)  /* FLASH Prefetch Buffer Disable */
+
+#define ACR_LATENCY               ((uint32)0x00000038)
+#define ACR_LATENCY_0                ((uint32)0x00000000)  /* FLASH Zero Latency cycle */
+#define ACR_LATENCY_1                ((uint32)0x00000001)  /* FLASH One Latency cycle */
+#define ACR_LATENCY_2                ((uint32)0x00000002)  /* FLASH Two Latency cycles */
+
+void flash_enable_prefetch(void) {
+   uint32 acr = __read(FLASH_ACR);
+
+   acr &= ACR_PRFTBE;
+   acr |= ACR_PRFTBE_ENABLE;
+
+   __write(FLASH_ACR, acr);
+}
+
+void flash_set_latency(void) {
+   uint32 acr = __read(FLASH_ACR);
+
+   acr &= ACR_LATENCY;
+   acr |= ACR_LATENCY_2;
+
+   __write(FLASH_ACR, acr);
+}
diff --git a/libmaple/flash.h b/libmaple/flash.h
new file mode 100644
index 0000000..741a444
--- /dev/null
+++ b/libmaple/flash.h
@@ -0,0 +1,16 @@
+/**
+ *  @brief 
+ */
+
+#ifndef _FLASH_H_
+#define _FLASH_H_
+
+#define FLASH_BASE              0x40022000
+#define FLASH_ACR               FLASH_BASE
+
+void flash_enable_prefetch(void);
+void flash_set_latency(void);
+
+#endif
+
+
diff --git a/libmaple/nvic.c b/libmaple/nvic.c
index 9b8c84f..45c1902 100644
--- a/libmaple/nvic.c
+++ b/libmaple/nvic.c
@@ -38,7 +38,7 @@ void nvic_disable_interrupts(void) {
 
 
 void nvic_set_vector_table(uint32_t *addr, uint32_t offset) {
-//    SCB->VTOR = NVIC_VectTab | (Offset & (u32)0x1FFFFF80);
+   __write(SCB_VTOR, (uint32_t)addr | (offset & 0x1FFFFF80));
 }
 
 
@@ -57,3 +57,5 @@ void nvic_enable_interrupt(uint32 n) {
         REG_SET_BIT(NVIC_ISER1, n - 32);
     }
 }
+
+
diff --git a/libmaple/nvic.h b/libmaple/nvic.h
index 5908e9c..89b66fc 100644
--- a/libmaple/nvic.h
+++ b/libmaple/nvic.h
@@ -18,8 +18,6 @@
  * ****************************************************************************/
 
 /**
- *  @file nvic.h
- *
  *  @brief Nested interrupt controller defines and prototypes
  */
 
diff --git a/libmaple/rcc.c b/libmaple/rcc.c
index bf76eb0..98b115a 100644
--- a/libmaple/rcc.c
+++ b/libmaple/rcc.c
@@ -6,8 +6,8 @@
  */
 
 #include "libmaple.h"
+#include "flash.h"
 #include "rcc.h"
-#include "stm32f10x_flash.h"
 
 static void set_ahb_prescaler(uint32_t divider) {
    uint32_t cfgr = __read(RCC_CFGR);
@@ -95,10 +95,10 @@ void rcc_init(void) {
 
    /* Leave this here for now...  */
    /* Enable Prefetch Buffer */
-   FLASH_PrefetchBufferCmd( (u32)FLASH_PrefetchBuffer_Enable);
+   flash_enable_prefetch();
 
    /* Flash 2 wait state */
-   FLASH_SetLatency(FLASH_Latency_2);
+   flash_set_latency();
 
    set_ahb_prescaler(SYSCLK_DIV_1);
    set_apb1_prescaler(HCLK_DIV_2);
diff --git a/libmaple/usb.h b/libmaple/usb.h
index 3b7a971..960e1f4 100644
--- a/libmaple/usb.h
+++ b/libmaple/usb.h
@@ -3,7 +3,6 @@
 
 #include <inttypes.h>
 #include "util.h"
-#include "cortexm3_macro.h"
 #include "usb_regs.h"
 #include "bootVect.h"
 
-- 
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