From: Keith Packard <keithp@keithp.com>
Date: Sat, 7 Dec 2013 17:38:50 +0000 (-0800)
Subject: src/cc1111: Turn off RC osc after xtal is running
X-Git-Tag: 1.3~82
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=de2e812b02a99a2f6d85f15a9600265931f6f6b0;hp=473ae38ade0552c5ff3ca088b21345ed5dfad5d0;ds=sidebyside

src/cc1111: Turn off RC osc after xtal is running

There's no reason to keep running the RC oscillator after we switch to
the crystal, so turn it off.

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/src/cc1111/ao_timer.c b/src/cc1111/ao_timer.c
index 54af9605..75cc4ce8 100644
--- a/src/cc1111/ao_timer.c
+++ b/src/cc1111/ao_timer.c
@@ -95,6 +95,13 @@ ao_clock_init(void)
 	while (!(SLEEP & SLEEP_XOSC_STB))
 		;
 
+	/* Power down the unused HFRC oscillator */
+	SLEEP |= SLEEP_OSC_PD;
+
+	/* Wait for HFRC to power down */
+	while ((SLEEP & SLEEP_HFRC_STB) != 0)
+		;
+	
 	/* Crank up the timer tick and system clock speed */
 	CLKCON = ((CLKCON & ~(CLKCON_TICKSPD_MASK | CLKCON_CLKSPD_MASK)) |
 		  (CLKCON_TICKSPD_1 | CLKCON_CLKSPD_1));