Revision 0:b77812004bbd, committed 2014-10-02

Comitter:

okini3939

Date:

Thu Oct 02 13:36:10 2014 +0000

Commit message:

1st build;

Changed in this revision

diff -r 000000000000 -r b77812004bbd main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Oct 02 13:36:10 2014 +0000
@@ -0,0 +1,87 @@
+/*
+ * MPU (Memory Protection Unit)
+ *
+ * Reference:
+ *   http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0337gj/BIHHGADD.html
+ *   http://www.phoenix-c.or.jp/~olfa/lpcxpresso/27_mpu.html
+ */
+
+#include "mbed.h"
+
+DigitalOut myled(LED1);
+Serial pc(USBTX, USBRX);
+
+int mpu_config (int region, void *addr, int size, bool readable, bool writable, bool executable, int sub) {
+    int a, s, ap, xn;
+
+    for (s = 4; s < 0x20; s ++) {
+        if (size == (1<<(s + 1))) break;
+    }
+    if (s == 0x20) error("Invalid size");
+
+    a = (int)addr & (0xffffffff<<(s + 1));
+    if (a != (int)addr) error("Invalid addr");
+
+    if (size <= 128) {
+        sub = 0;
+    }
+
+    ap = 0;
+    if (readable) {
+        ap = writable ? 0x03 : 0x07;
+    }
+    xn = executable ? 0 : 1;
+
+    MPU->CTRL = (1<<2)|(1<<0);
+    MPU->RBAR = a|(1<<4)|(region & 0x0f);
+    MPU->RASR = (xn<<28)|(ap<<24)|(0x1<<19)|((sub & 0xff)<<8)|(s<<1)|(1<<0);
+    return 0;
+}
+
+
+extern "C" {
+void HardFault_Handler () {
+    error(" *** HardFault\r\n");
+}
+void MemManage_Handler () {
+    error(" *** MemManage\r\n");
+}
+}
+
+int main() {
+    char *buf1 = (char*)0x2007c000;
+    char *buf2 = (char*)0x20080000;
+    int i;
+    volatile int c;
+
+    pc.baud(115200);
+    pc.printf("--- mem test\r\n");
+
+    if (mpu_config(0, buf1, 0x4000, true, false, false, 0x01)) return -1;
+    if (mpu_config(1, buf2, 0x4000, false, false, false, 0x03)) return -1;
+    SCB->SHCSR |= (1<<16); // Enable Memory Management Fault
+
+    pc.printf("\r\nwrite 1\r\n");
+    for (i = 0; i < 0x4000; i += 1024) {
+        pc.printf(" %d", i);
+        c = buf1[i];
+    }
+
+    pc.printf("\r\nread 1\r\n");
+    for (i = 0; i < 0x4000; i += 1024) {
+        pc.printf(" %d", i);
+        buf1[i] = c;
+    }
+
+    pc.printf("\r\nwrite 2\r\n");
+    for (i = 0; i < 0x4000; i += 1024) {
+        pc.printf(" %d", i);
+        c = buf2[i];
+    }
+
+    pc.printf("\r\nread 2\r\n");
+    for (i = 0; i < 0x4000; i += 1024) {
+        pc.printf(" %d", i);
+        buf2[i] = c;
+    }
+}

diff -r 000000000000 -r b77812004bbd mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Thu Oct 02 13:36:10 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/552587b429a1
\ No newline at end of file