nalydmerc/gameboy_rs
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I2C communications are working. <3

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nalydmerc
2025-04-08 18:16:41 -04:00
parent 3578ea097b
commit 04195a2122
1 changed files with 2 additions and 25 deletions
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27
src/main.rs
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@@ -33,30 +33,6 @@ fn toggle_mcu_led(gpioa: &mut stm32f103::GPIOA) {
});
}
fn i2c1_write(addr: &u8, data: &[u8]) {
cortex_m::interrupt::free(|cs| {
if let Some(ref mut i2c1) = *I2C1.borrow(cs).borrow_mut() {
i2c1.cr1.modify(|_,w| w.start().set_bit());
while i2c1.sr1.read().sb().bit_is_clear() {}
i2c1.dr.write(|w| w.dr().bits(*addr));
while i2c1.sr1.read().addr().bit_is_clear() {}
let _ = i2c1.sr2.read();
for byte in data {
i2c1.dr.write(|w| w.dr().bits(*byte));
while i2c1.sr1.read().tx_e().bit_is_clear() {}
}
while i2c1.sr1.read().btf().bit_is_clear() {}
i2c1.cr1.modify(|_,w| w.stop().set_bit());
}
});
}
#[interrupt]
fn I2C1_EV() {
cortex_m::interrupt::free(|cs| {
@@ -108,7 +84,8 @@ fn main() -> ! {
// Configure peripheral
i2c1.cr1.modify(|_,w| w.pe().enabled());
i2c1.cr1.modify(|_,w| w.smbus().i2c());
i2c1.oar1.modify(|_,w| w.add().bits(0x32));
i2c1.cr1.modify(|_, w| w.ack().set_bit());
i2c1.oar1.modify(|_,w| w.add().bits(0x32 << 1));
i2c1.oar1.modify(|_,w| w.addmode().add7());
// Pass peripheral reference to global static