Commit 0ec969ef authored by Per's avatar Per

bare0 const

parent 32b5acee
......@@ -9,7 +9,7 @@
// Minimal runtime / startup for Cortex-M microcontrollers
extern crate cortex_m_rt;
const X_INIT: u32 = 0;
const X_INIT: u32 = 10;
static mut X: u32 = X_INIT;
static mut Y: u32 = 0;
......@@ -40,7 +40,7 @@ fn main() {
// and see how the (Local) Varibles are updated
// can you foresee what will eventually happen?
// ** place your answer here **
//
//
// commit your answers (bare0_1)
//
// 2. alter the constant X_INIT so that line 22 directly causes the x to wrap
......@@ -58,17 +58,17 @@ fn main() {
// ** your answer here **
//
// commit your answers (bare0_3)
//
// (if the program did not succed back to the breakpoint
//
// (if the program did not succed back to the breakpoint
// you have some fault in the program and go back to 3)
//
//
// 4. change the asserion to assert!(x == X && X == Y + 1), what happens
// ** place your answer here **
//
// commit your answers (bare0_4)
//
// 5. remove the assertion and
//
//
// make "safe" functions for reading and writing X and Y
// e.g. read_x, read_y, write_x, write_y
//
......@@ -78,13 +78,13 @@ fn main() {
// commit your solution (bare0_5)
//
// 6*. optional
// implement a read_u32/write_u32, taking a reference to a
// implement a read_u32/write_u32, taking a reference to a
// "static" variable
//
//
// rewrite the program to use this abstraction instead of "read_x", etc.
//
//
// commit your solution (bare0_6)
//
//
// As we are not using interrupts, we just register a dummy catch all handler
#[link_section = ".vector_table.interrupts"]
......
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