From 0f011d53de504b164eec9ac9fd313d9cb43707e0 Mon Sep 17 00:00:00 2001
From: Dan Evans <dan.evans@nelsonirrigation.com>
Date: Tue, 23 Jan 2018 16:24:17 -0700
Subject: [PATCH] samd21/cpu DFLL lock loop error
---
cpu/samd21/cpu.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/cpu/samd21/cpu.c b/cpu/samd21/cpu.c
index f6c59bccb2..9590e9fccd 100644
--- a/cpu/samd21/cpu.c
+++ b/cpu/samd21/cpu.c
@@ -161,11 +161,10 @@ static void clk_init(void)
}
SYSCTRL->DFLLCTRL.bit.ENABLE = 1;
- while ((SYSCTRL->PCLKSR.reg & (SYSCTRL_PCLKSR_DFLLRDY |
- SYSCTRL_PCLKSR_DFLLLCKF |
- SYSCTRL_PCLKSR_DFLLLCKC)) == 0) {
- /* Wait for DFLLLXXX sync */
- }
+ uint32_t mask = SYSCTRL_PCLKSR_DFLLRDY |
+ SYSCTRL_PCLKSR_DFLLLCKF |
+ SYSCTRL_PCLKSR_DFLLLCKC;
+ while ((SYSCTRL->PCLKSR.reg & mask) != mask) { } /* Wait for DFLL lock */
/* select the DFLL as source for clock generator 0 (CPU core clock) */
GCLK->GENDIV.reg = (GCLK_GENDIV_DIV(1U) | GCLK_GENDIV_ID(0));
--
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