rust/comprehensive-rust
1
0
Fork 0
mirror of https://github.com/google/comprehensive-rust.git synced 2025-03-28 00:26:44 +02:00
Code Issues Releases Activity

Wrap comments in example at 80 columns to fit in code block.

Browse Source
This commit is contained in:
Andrew Walbran 2023-03-07 10:58:40 +00:00
parent e751c30061
commit b1fa8da341
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/bare-metal/microcontrollers/examples/src/bin/mmio.rs
View File

@ -43,7 +43,8 @@ fn main() -> ! {
// Configure GPIO 0 pins 21 and 28 as push-pull outputs. // Configure GPIO 0 pins 21 and 28 as push-pull outputs.
let pin_cnf_21 = (GPIO_P0 + PIN_CNF + 21 * size_of::<u32>()) as *mut u32; let pin_cnf_21 = (GPIO_P0 + PIN_CNF + 21 * size_of::<u32>()) as *mut u32;
let pin_cnf_28 = (GPIO_P0 + PIN_CNF + 28 * size_of::<u32>()) as *mut u32; let pin_cnf_28 = (GPIO_P0 + PIN_CNF + 28 * size_of::<u32>()) as *mut u32;
// Safe because the pointers are to valid peripheral control registers, and no aliases exist. // Safe because the pointers are to valid peripheral control registers, and
// no aliases exist.
unsafe { unsafe {
pin_cnf_21.write_volatile( pin_cnf_21.write_volatile(
DIR_OUTPUT | INPUT_DISCONNECT | PULL_DISABLED | DRIVE_S0S1 | SENSE_DISABLED, DIR_OUTPUT | INPUT_DISCONNECT | PULL_DISABLED | DRIVE_S0S1 | SENSE_DISABLED,
@ -56,7 +57,8 @@ fn main() -> ! {
// Set pin 28 low and pin 21 high to turn the LED on. // Set pin 28 low and pin 21 high to turn the LED on.
let gpio0_outset = (GPIO_P0 + OUTSET) as *mut u32; let gpio0_outset = (GPIO_P0 + OUTSET) as *mut u32;
let gpio0_outclr = (GPIO_P0 + OUTCLR) as *mut u32; let gpio0_outclr = (GPIO_P0 + OUTCLR) as *mut u32;
// Safe because the pointers are to valid peripheral control registers, and no aliases exist. // Safe because the pointers are to valid peripheral control registers, and
// no aliases exist.
unsafe { unsafe {
gpio0_outclr.write_volatile(1 << 28); gpio0_outclr.write_volatile(1 << 28);
gpio0_outset.write_volatile(1 << 21); gpio0_outset.write_volatile(1 << 21);