From 2de4d5917172fcef180b6824da1da07fd8955b49 Mon Sep 17 00:00:00 2001
From: Damien George <damien.p.george@gmail.com>
Date: Mon, 19 May 2014 18:58:53 +0100
Subject: [PATCH] stmhal: Fix write_timed function for DAC(2).

Addresses issue #617.
---
 stmhal/dac.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/stmhal/dac.c b/stmhal/dac.c
index f0f723f853..9b73b2dae3 100644
--- a/stmhal/dac.c
+++ b/stmhal/dac.c
@@ -295,7 +295,11 @@ mp_obj_t pyb_dac_write_timed(uint n_args, const mp_obj_t *args, mp_map_t *kw_arg
     DMA_Handle.Init.PeriphBurst = DMA_PBURST_SINGLE;
     HAL_DMA_Init(&DMA_Handle);
 
-    __HAL_LINKDMA(&DAC_Handle, DMA_Handle1, DMA_Handle);
+    if (self->dac_channel == DAC_CHANNEL_1) {
+        __HAL_LINKDMA(&DAC_Handle, DMA_Handle1, DMA_Handle);
+    } else {
+        __HAL_LINKDMA(&DAC_Handle, DMA_Handle2, DMA_Handle);
+    }
 
     DAC_Handle.Instance = DAC;
     DAC_Handle.State = HAL_DAC_STATE_RESET;