diff options
Diffstat (limited to 'src/bsp/drivers/gpio/mod.rs')
-rw-r--r-- | src/bsp/drivers/gpio/mod.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/bsp/drivers/gpio/mod.rs b/src/bsp/drivers/gpio/mod.rs new file mode 100644 index 0000000..a94c6e5 --- /dev/null +++ b/src/bsp/drivers/gpio/mod.rs @@ -0,0 +1,28 @@ +/// # GPIO Register +pub mod GPPUD { + const ADDR: u32 = 0x3F200094; + pub fn set(v: u32) { + use crate::cpu::store32; + store32(ADDR, v) + } + pub fn clear() { + set(0) + } +} +/// # GPIO Clock 0 Register +pub mod GPPUDCLK0 { + const ADDR: u32 = 0x3F200098; + const MASK: u32 = (1 << 14) | (1 << 15); + pub fn set(v: u32) { + use crate::cpu::store32; + store32(ADDR, v) + } + pub fn init() { + use crate::cpu::spin_for_n_cycles; + super::GPPUD::clear(); + spin_for_n_cycles(150); + set(MASK); + spin_for_n_cycles(150); + set(0); + } +} |