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Fix bit-band access

master
Levi Pearson 2019-03-27 04:52:31 -06:00
parent aaacf82f39
commit c16a43cdd3
1 changed files with 4 additions and 4 deletions
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8
src/bitband.rs
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@ -23,7 +23,7 @@ const PERIPHERAL_LIMIT: usize = 0x4010_0000;
const ALIAS_OFFSET: usize = 0x0200_0000;
const REGION_MASK: usize = 0xF000_0000;
const WORD_MASK: usize = 0x0FFF_0000;
const WORD_MASK: usize = 0x0FFF_FFFF;
/// Atomically sets (via read/modify/write) a single bit at the given address
/// without affecting other bits in that memory location.
@ -31,7 +31,7 @@ const WORD_MASK: usize = 0x0FFF_0000;
pub unsafe fn set_bit<T>(address: *const T, bit: u8) {
let address = address as usize;
let bit_address = bitband_alias_of(address, bit);
write_volatile(bit_address as *mut _, 0x01);
write_volatile(bit_address as *mut u16, 0x01);
}
/// Atomically clears (via read/modify/write) a single bit at the given address
@ -40,7 +40,7 @@ pub unsafe fn set_bit<T>(address: *const T, bit: u8) {
pub unsafe fn clear_bit<T>(address: *const T, bit: u8) {
let address = address as usize;
let bit_address = bitband_alias_of(address, bit);
write_volatile(bit_address as *mut _, 0x00);
write_volatile(bit_address as *mut u16, 0x00);
}
/// Reads a single bit at the given address without affecting other
@ -49,7 +49,7 @@ pub unsafe fn clear_bit<T>(address: *const T, bit: u8) {
pub unsafe fn read_bit<T>(address: *const T, bit: u8) -> T {
let address = address as usize;
let bit_address = bitband_alias_of(address, bit);
read_volatile(bit_address as *const _)
read_volatile(bit_address as *const T)
}
/// Calculate the address in the bitband region of the given bit