Add README.

[gps-watch.git] / src / common / clock.rs

diff --git a/src/common/clock.rs b/src/common/clock.rs
index 3d46016cb0558c86c45dc8483da96eb8ac932f17..1189fdd58a45ac49f9de05d39f5ae9c8fc11b4ec 100644 (file)
--- a/src/common/clock.rs
+++ b/src/common/clock.rs
@@ -75,6 +75,10 @@ const MCG_S_CLKST_MASK: u8 = 3 << MCG_S_CLKST_SHIFT;
 const MCG_S_IREFST: u8 = 1 << 4;
 const MCG_S_LOCK0: u8 = 1 << 6;
 
+const OSC0_CR: u32 = 0x40065000;
+
+const OSC_CR_ERCLKEN: u8 = 1 << 7;
+
 fn configure_clkdiv() {
     let mut clkdiv1 = Reg32::new(SIM_CLKDIV1);
 
@@ -164,6 +168,15 @@ pub unsafe fn configure() {
     });
 }
 
+pub unsafe fn reset() {
+    switch_to_pbe();
+    switch_to_fbe();
+}
+
+pub unsafe fn enable_osc0() {
+    Reg8::new(OSC0_CR).write(OSC_CR_ERCLKEN);
+}
+
 pub unsafe fn configure_usb() {
     let mut scgc4 = Reg32::new(SIM_SCGC4);
     scgc4.modify(|v| v & !SIM_SCGC4_USBOTG);