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Option to detect Ethernet PHY address automatically

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This commit is contained in:
nikvoid 2025-01-22 13:23:29 +02:00
parent 27fb1f4dd0
commit 5885369f47
1 changed files with 20 additions and 2 deletions
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22
embassy-stm32/src/eth/generic_smi.rs
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@ -51,6 +51,8 @@ pub struct GenericSMI {
impl GenericSMI { impl GenericSMI {
/// Construct the PHY. It assumes the address `phy_addr` in the SMI communication /// Construct the PHY. It assumes the address `phy_addr` in the SMI communication
///
/// Set `phy_addr` to `0xFF` for automatic detection
pub fn new(phy_addr: u8) -> Self { pub fn new(phy_addr: u8) -> Self {
Self { Self {
phy_addr, phy_addr,
@ -62,8 +64,24 @@ impl GenericSMI {
unsafe impl PHY for GenericSMI { unsafe impl PHY for GenericSMI {
fn phy_reset<S: StationManagement>(&mut self, sm: &mut S) { fn phy_reset<S: StationManagement>(&mut self, sm: &mut S) {
sm.smi_write(self.phy_addr, PHY_REG_BCR, PHY_REG_BCR_RESET); // Detect SMI address
while sm.smi_read(self.phy_addr, PHY_REG_BCR) & PHY_REG_BCR_RESET == PHY_REG_BCR_RESET {} if self.phy_addr == 0xFF {
for addr in 0..32 {
sm.smi_write(addr, PHY_REG_BCR, PHY_REG_BCR_RESET);
for _ in 0..10 {
if sm.smi_read(addr, PHY_REG_BCR) & PHY_REG_BCR_RESET != PHY_REG_BCR_RESET {
trace!("Found ETH PHY on address {}", addr);
self.phy_addr = addr;
return;
}
cortex_m::asm::delay(1000);
}
}
panic!("PHY did not respond");
} else {
sm.smi_write(self.phy_addr, PHY_REG_BCR, PHY_REG_BCR_RESET);
while sm.smi_read(self.phy_addr, PHY_REG_BCR) & PHY_REG_BCR_RESET == PHY_REG_BCR_RESET {}
}
} }
fn phy_init<S: StationManagement>(&mut self, sm: &mut S) { fn phy_init<S: StationManagement>(&mut self, sm: &mut S) {