stm32/rcc: refactor and unify f4 into f7.

5 files changed, 81 insertions, 16 deletions

diff --git a/examples/stm32f4/src/bin/eth.rs b/examples/stm32f4/src/bin/eth.rs
index ddf8596ae..1747bbf4b 100644
--- a/examples/stm32f4/src/bin/eth.rs
+++ b/examples/stm32f4/src/bin/eth.rs
@@ -10,7 +10,7 @@ use embassy_stm32::eth::generic_smi::GenericSMI;
 use embassy_stm32::eth::{Ethernet, PacketQueue};
 use embassy_stm32::peripherals::ETH;
 use embassy_stm32::rng::Rng;
-use embassy_stm32::time::mhz;
+use embassy_stm32::time::Hertz;
 use embassy_stm32::{bind_interrupts, eth, peripherals, rng, Config};
 use embassy_time::Timer;
 use embedded_io_async::Write;
@@ -32,7 +32,25 @@ async fn net_task(stack: &'static Stack<Device>) -> ! {
 #[embassy_executor::main]
 async fn main(spawner: Spawner) -> ! {
     let mut config = Config::default();
-    config.rcc.sys_ck = Some(mhz(200));
+    {
+        use embassy_stm32::rcc::*;
+        config.rcc.hse = Some(Hse {
+            freq: Hertz(8_000_000),
+            mode: HseMode::Bypass,
+        });
+        config.rcc.pll_src = PllSource::HSE;
+        config.rcc.pll = Some(Pll {
+            prediv: PllPreDiv::DIV4,
+            mul: PllMul::MUL180,
+            divp: Some(Pllp::DIV2), // 8mhz / 4 * 180 / 2 = 180Mhz.
+            divq: None,
+            divr: None,
+        });
+        config.rcc.ahb_pre = AHBPrescaler::DIV1;
+        config.rcc.apb1_pre = APBPrescaler::DIV4;
+        config.rcc.apb2_pre = APBPrescaler::DIV2;
+        config.rcc.sys = Sysclk::PLL1_P;
+    }
     let p = embassy_stm32::init(config);
 
     info!("Hello World!");
diff --git a/examples/stm32f4/src/bin/hello.rs b/examples/stm32f4/src/bin/hello.rs
index 27ee83aa5..a2a287110 100644
--- a/examples/stm32f4/src/bin/hello.rs
+++ b/examples/stm32f4/src/bin/hello.rs
@@ -4,15 +4,13 @@
 
 use defmt::info;
 use embassy_executor::Spawner;
-use embassy_stm32::time::Hertz;
 use embassy_stm32::Config;
 use embassy_time::Timer;
 use {defmt_rtt as _, panic_probe as _};
 
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) -> ! {
-    let mut config = Config::default();
-    config.rcc.sys_ck = Some(Hertz(84_000_000));
+    let config = Config::default();
     let _p = embassy_stm32::init(config);
 
     loop {
diff --git a/examples/stm32f4/src/bin/sdmmc.rs b/examples/stm32f4/src/bin/sdmmc.rs
index 6ec7d0fec..37e42384b 100644
--- a/examples/stm32f4/src/bin/sdmmc.rs
+++ b/examples/stm32f4/src/bin/sdmmc.rs
@@ -5,7 +5,7 @@
 use defmt::*;
 use embassy_executor::Spawner;
 use embassy_stm32::sdmmc::{DataBlock, Sdmmc};
-use embassy_stm32::time::mhz;
+use embassy_stm32::time::{mhz, Hertz};
 use embassy_stm32::{bind_interrupts, peripherals, sdmmc, Config};
 use {defmt_rtt as _, panic_probe as _};
 
@@ -20,8 +20,25 @@ bind_interrupts!(struct Irqs {
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
     let mut config = Config::default();
-    config.rcc.sys_ck = Some(mhz(48));
-    config.rcc.pll48 = true;
+    {
+        use embassy_stm32::rcc::*;
+        config.rcc.hse = Some(Hse {
+            freq: Hertz(8_000_000),
+            mode: HseMode::Bypass,
+        });
+        config.rcc.pll_src = PllSource::HSE;
+        config.rcc.pll = Some(Pll {
+            prediv: PllPreDiv::DIV4,
+            mul: PllMul::MUL168,
+            divp: Some(Pllp::DIV2), // 8mhz / 4 * 168 / 2 = 168Mhz.
+            divq: Some(Pllq::DIV7), // 8mhz / 4 * 168 / 7 = 48Mhz.
+            divr: None,
+        });
+        config.rcc.ahb_pre = AHBPrescaler::DIV1;
+        config.rcc.apb1_pre = APBPrescaler::DIV4;
+        config.rcc.apb2_pre = APBPrescaler::DIV2;
+        config.rcc.sys = Sysclk::PLL1_P;
+    }
     let p = embassy_stm32::init(config);
     info!("Hello World!");
 
diff --git a/examples/stm32f4/src/bin/usb_ethernet.rs b/examples/stm32f4/src/bin/usb_ethernet.rs
index 763e3a9e7..7c0644aeb 100644
--- a/examples/stm32f4/src/bin/usb_ethernet.rs
+++ b/examples/stm32f4/src/bin/usb_ethernet.rs
@@ -7,7 +7,7 @@ use embassy_executor::Spawner;
 use embassy_net::tcp::TcpSocket;
 use embassy_net::{Stack, StackResources};
 use embassy_stm32::rng::{self, Rng};
-use embassy_stm32::time::mhz;
+use embassy_stm32::time::Hertz;
 use embassy_stm32::usb_otg::Driver;
 use embassy_stm32::{bind_interrupts, peripherals, usb_otg, Config};
 use embassy_usb::class::cdc_ncm::embassy_net::{Device, Runner, State as NetState};
@@ -46,9 +46,25 @@ async fn main(spawner: Spawner) {
     info!("Hello World!");
 
     let mut config = Config::default();
-    config.rcc.pll48 = true;
-    config.rcc.sys_ck = Some(mhz(48));
-
+    {
+        use embassy_stm32::rcc::*;
+        config.rcc.hse = Some(Hse {
+            freq: Hertz(8_000_000),
+            mode: HseMode::Bypass,
+        });
+        config.rcc.pll_src = PllSource::HSE;
+        config.rcc.pll = Some(Pll {
+            prediv: PllPreDiv::DIV4,
+            mul: PllMul::MUL168,
+            divp: Some(Pllp::DIV2), // 8mhz / 4 * 168 / 2 = 168Mhz.
+            divq: Some(Pllq::DIV7), // 8mhz / 4 * 168 / 7 = 48Mhz.
+            divr: None,
+        });
+        config.rcc.ahb_pre = AHBPrescaler::DIV1;
+        config.rcc.apb1_pre = APBPrescaler::DIV4;
+        config.rcc.apb2_pre = APBPrescaler::DIV2;
+        config.rcc.sys = Sysclk::PLL1_P;
+    }
     let p = embassy_stm32::init(config);
 
     // Create the driver, from the HAL.
diff --git a/examples/stm32f4/src/bin/usb_serial.rs b/examples/stm32f4/src/bin/usb_serial.rs
index 4ff6452ef..004ff038d 100644
--- a/examples/stm32f4/src/bin/usb_serial.rs
+++ b/examples/stm32f4/src/bin/usb_serial.rs
@@ -4,7 +4,7 @@
 
 use defmt::{panic, *};
 use embassy_executor::Spawner;
-use embassy_stm32::time::mhz;
+use embassy_stm32::time::Hertz;
 use embassy_stm32::usb_otg::{Driver, Instance};
 use embassy_stm32::{bind_interrupts, peripherals, usb_otg, Config};
 use embassy_usb::class::cdc_acm::{CdcAcmClass, State};
@@ -22,9 +22,25 @@ async fn main(_spawner: Spawner) {
     info!("Hello World!");
 
     let mut config = Config::default();
-    config.rcc.pll48 = true;
-    config.rcc.sys_ck = Some(mhz(48));
-
+    {
+        use embassy_stm32::rcc::*;
+        config.rcc.hse = Some(Hse {
+            freq: Hertz(8_000_000),
+            mode: HseMode::Bypass,
+        });
+        config.rcc.pll_src = PllSource::HSE;
+        config.rcc.pll = Some(Pll {
+            prediv: PllPreDiv::DIV4,
+            mul: PllMul::MUL168,
+            divp: Some(Pllp::DIV2), // 8mhz / 4 * 168 / 2 = 168Mhz.
+            divq: Some(Pllq::DIV7), // 8mhz / 4 * 168 / 7 = 48Mhz.
+            divr: None,
+        });
+        config.rcc.ahb_pre = AHBPrescaler::DIV1;
+        config.rcc.apb1_pre = APBPrescaler::DIV4;
+        config.rcc.apb2_pre = APBPrescaler::DIV2;
+        config.rcc.sys = Sysclk::PLL1_P;
+    }
     let p = embassy_stm32::init(config);
 
     // Create the driver, from the HAL.