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This commit is contained in:
Alexander Neuhäuser
2025-06-08 21:49:36 +02:00
parent 8c193f5c15
commit 1ff752e3dd
3 changed files with 86 additions and 18 deletions
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34
src/peripherals/gpio.rs
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@@ -90,30 +90,28 @@ pub fn gpio_pull_down(gpio: u8) {
}
fn gpio_pull_up_down(gpio: u8, val: u32) {
unsafe {
// Determine GPPUDCLK Register
let register_addr = GPPUDCLK_BASE + 4 * (gpio as u32 / 32);
let register_offset = gpio % 32;
// Determine GPPUDCLK Register
let register_addr = GPPUDCLK_BASE + 4 * (gpio as u32 / 32);
let register_offset = gpio % 32;
// 1. Write Pull up
mmio_write(GPPUD, val);
// 1. Write Pull up
mmio_write(GPPUD, val);
// 2. Delay 150 cycles
delay_nops(150);
// 2. Delay 150 cycles
delay_nops(150);
// 3. Write to clock
let new_val = 0b1 << register_offset;
mmio_write(register_addr, new_val);
// 3. Write to clock
let new_val = 0b1 << register_offset;
mmio_write(register_addr, new_val);
// 4. Delay 150 cycles
delay_nops(150);
// 4. Delay 150 cycles
delay_nops(150);
// 5. reset GPPUD
mmio_write(GPPUD, 0);
// 5. reset GPPUD
mmio_write(GPPUD, 0);
// 6. reset clock
mmio_write(register_addr, 0);
}
// 6. reset clock
mmio_write(register_addr, 0);
}
/// Get the current status if falling edge detection is set