No more need for the delay after selecting PHY

dgoodlad · Cryowatt · commit 5935cad2c52c · 2023-05-10T12:43:20.000-07:00
diff --git a/src/bus.rs b/src/bus.rs
@@ -431,13 +431,6 @@ impl<USB: UsbPeripheral> usb_device::bus::UsbBus for UsbBus<USB> {
                 }
             }
 
-            // Delay a few cycles after selecting PHY before doing a core reset
-            // https://community.st.com/s/question/0D53W00000znL7jSAE/stm32h745-usbotg-intermittently-fails-to-respond-to-core-reset
-            #[cfg(not(feature = "cortex-m"))]
-            for _ in 0..500000 {};
-            #[cfg(feature = "cortex-m")]
-            cortex_m::asm::delay(25600);
-
             // Perform core soft-reset
             while read_reg!(otg_global, regs.global(), GRSTCTL, AHBIDL) == 0 {}
             modify_reg!(otg_global, regs.global(), GRSTCTL, CSRST: 1);

Original file line number	Diff line number	Diff line change
`@@ -431,13 +431,6 @@ impl<USB: UsbPeripheral> usb_device::bus::UsbBus for UsbBus<USB> {`
`431`	`431`	`}`
`432`	`432`	`}`
`433`	`433`
`434`		`- // Delay a few cycles after selecting PHY before doing a core reset`
`435`		`- // https://community.st.com/s/question/0D53W00000znL7jSAE/stm32h745-usbotg-intermittently-fails-to-respond-to-core-reset`
`436`		`- #[cfg(not(feature = "cortex-m"))]`
`437`		`- for _ in 0..500000 {};`
`438`		`- #[cfg(feature = "cortex-m")]`
`439`		`- cortex_m::asm::delay(25600);`
`440`		`-`
`441`	`434`	`// Perform core soft-reset`
`442`	`435`	`while read_reg!(otg_global, regs.global(), GRSTCTL, AHBIDL) == 0 {}`
`443`	`436`	`modify_reg!(otg_global, regs.global(), GRSTCTL, CSRST: 1);`