From 30d1bf490071c6beeeb3b6f1eb108f4450e0fdf6 Mon Sep 17 00:00:00 2001
From: syfre <syfre92@gmail.com>
Date: Sat, 6 May 2017 23:02:54 +0200
Subject: [PATCH] Fix, add ADC_CR2_EXTTRIG to adc_set_extsel() to enable the
 external trigger mode

---
 STM32F1/cores/maple/libmaple/adc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/STM32F1/cores/maple/libmaple/adc.c b/STM32F1/cores/maple/libmaple/adc.c
index 7c48ee4..416cfaa 100644
--- a/STM32F1/cores/maple/libmaple/adc.c
+++ b/STM32F1/cores/maple/libmaple/adc.c
@@ -59,6 +59,7 @@ void adc_set_extsel(adc_dev *dev, adc_extsel_event event) {
     uint32 cr2 = dev->regs->CR2;
     cr2 &= ~ADC_CR2_EXTSEL;
     cr2 |= event;
+    cr2 |= ADC_CR2_EXTTRIG;
     dev->regs->CR2 = cr2;
 }