From: Keith Packard <keithp@keithp.com>
Date: Sat, 22 Jun 2013 02:40:59 +0000 (-0700)
Subject: altos/lpc: Don't disable all interrupts when disabling one interrupt
X-Git-Tag: 1.2.9.4~151
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=58eda6f873f5d6e8e219f769bdf67ce4dbc96fd7

altos/lpc: Don't disable all interrupts when disabling one interrupt

The nvic iser and icer registers read value indicates all enabled
interrupts, icer writes disable the set interrupts. Re-writing icer
with the current value ends up disabling all interrupts, not exactly
what we wanted.

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

diff --git a/src/lpc/lpc.h b/src/lpc/lpc.h
index f13ec615..8fb78649 100644
--- a/src/lpc/lpc.h
+++ b/src/lpc/lpc.h
@@ -1014,12 +1014,12 @@ extern struct lpc_nvic lpc_nvic;
 
 static inline void
 lpc_nvic_set_enable(int irq) {
-	lpc_nvic.iser |= (1 << irq);
+	lpc_nvic.iser = (1 << irq);
 }
 
 static inline void
 lpc_nvic_clear_enable(int irq) {
-	lpc_nvic.icer |= (1 << irq);
+	lpc_nvic.icer = (1 << irq);
 }
 
 static inline int