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-rw-r--r--digital/ucoolib/ucoolib/hal/adc/adc_hard.stm32f4.cc69
1 files changed, 69 insertions, 0 deletions
diff --git a/digital/ucoolib/ucoolib/hal/adc/adc_hard.stm32f4.cc b/digital/ucoolib/ucoolib/hal/adc/adc_hard.stm32f4.cc
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+++ b/digital/ucoolib/ucoolib/hal/adc/adc_hard.stm32f4.cc
@@ -0,0 +1,69 @@
+// ucoolib - Microcontroller object oriented library. {{{
+//
+// Copyright (C) 2013 Nicolas Schodet
+//
+// APBTeam:
+// Web: http://apbteam.org/
+// Email: team AT apbteam DOT org
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+//
+// }}}
+#include "adc_hard.stm32f4.hh"
+
+#include <libopencm3/stm32/f4/adc.h>
+#include <libopencm3/stm32/f4/rcc.h>
+
+namespace ucoo {
+
+AdcHard::AdcHard (int n)
+ : n_ (n)
+{
+ static const uint32_t bases[] = { ADC1, ADC2, ADC3 };
+ assert (n < (int) lengthof (bases));
+ base_ = bases[n];
+}
+
+AdcHard::~AdcHard ()
+{
+ disable ();
+}
+
+void
+AdcHard::enable ()
+{
+ rcc_peripheral_enable_clock (&RCC_APB2ENR, RCC_APB2ENR_ADC1EN << n_);
+ ADC_CR2 (base_) = ADC_CR2_ADON;
+}
+
+void
+AdcHard::disable ()
+{
+ ADC_CR2 (base_) = 0;
+ rcc_peripheral_disable_clock (&RCC_APB2ENR, RCC_APB2ENR_ADC1EN << n_);
+}
+
+int
+AdcHard::read (int channel)
+{
+ ADC_SQR3 (base_) = channel;
+ ADC_CR2 (base_) |= ADC_CR2_SWSTART;
+ while (!(ADC_SR (base_) & ADC_SR_EOC))
+ yield ();
+ ADC_SR (base_) = ~ADC_SR_EOC;
+ return ADC_DR (base_);
+}
+
+} // namespace ucoo