From c8ab4f8865a7f2b15f1edf398640dc85caaed843 Mon Sep 17 00:00:00 2001
From: "(no author)" <(no author)@6dc7ffe9-61d6-0310-9af1-9938baff3ed1>
Date: Tue, 8 Aug 2006 22:23:55 +0000
Subject: prevent CARRIER_DIV_HELP from becoming permanently zero

git-svn-id: https://svn.openpcd.org:2342/trunk@90 6dc7ffe9-61d6-0310-9af1-9938baff3ed1
---
 openpcd/firmware/src/tc.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/openpcd/firmware/src/tc.c b/openpcd/firmware/src/tc.c
index 5318644..4a0189b 100644
--- a/openpcd/firmware/src/tc.c
+++ b/openpcd/firmware/src/tc.c
@@ -19,14 +19,20 @@ void tc_cdiv_set_divider(u_int16_t div)
 	tcb->TCB_TC0.TC_RC = div;
 
 	/* set to 50% duty cycle */
-	tcb->TCB_TC0.TC_RA = 0;
-	tcb->TCB_TC0.TC_RB = div >> 1;
+	tcb->TCB_TC0.TC_RA = 1;
+	tcb->TCB_TC0.TC_RB = 1 + (div >> 1);
 }
 
 void tc_cdiv_phase_add(int16_t inc)
 {
 	tcb->TCB_TC0.TC_RA = (tcb->TCB_TC0.TC_RA + inc) % tcb->TCB_TC0.TC_RC;
 	tcb->TCB_TC0.TC_RB = (tcb->TCB_TC0.TC_RB + inc) % tcb->TCB_TC0.TC_RC;
+
+	/* FIXME: can this be done more elegantly? */
+	if (tcb->TCB_TC0.TC_RA == 0) {
+		tcb->TCB_TC0.TC_RA += 1;
+		tcb->TCB_TC0.TC_RB += 1;
+	}
 }
 
 void tc_cdiv_init(void)
-- 
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