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Diffstat (limited to 'digital/ucoolib/ucoolib/hal/gpio/gpio.stm32f4.cc')
-rw-r--r--digital/ucoolib/ucoolib/hal/gpio/gpio.stm32f4.cc85
1 files changed, 85 insertions, 0 deletions
diff --git a/digital/ucoolib/ucoolib/hal/gpio/gpio.stm32f4.cc b/digital/ucoolib/ucoolib/hal/gpio/gpio.stm32f4.cc
new file mode 100644
index 00000000..60f540c8
--- /dev/null
+++ b/digital/ucoolib/ucoolib/hal/gpio/gpio.stm32f4.cc
@@ -0,0 +1,85 @@
+// ucoolib - Microcontroller object oriented library. {{{
+//
+// Copyright (C) 2012 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 "gpio.stm32f4.hh"
+
+namespace ucoo {
+
+void
+Gpio::set ()
+{
+ GPIO_BSRR (port_) = mask_;
+}
+
+void
+Gpio::reset ()
+{
+ GPIO_BSRR (port_) = mask_ << 16;
+}
+
+/// Helper to avoid virtual dance.
+static inline void
+Gpio_set (uint32_t port, uint16_t mask, bool state)
+{
+ if (state)
+ GPIO_BSRR (port) = mask;
+ else
+ GPIO_BSRR (port) = mask << 16;
+}
+
+void
+Gpio::set (bool state)
+{
+ Gpio_set (port_, mask_, state);
+}
+
+void
+Gpio::toggle ()
+{
+ // Avoid read/modify/write ODR, to achieve atomic operation.
+ Gpio_set (port_, mask_, !(GPIO_ODR (port_) & mask_));
+}
+
+bool
+Gpio::get () const
+{
+ return GPIO_IDR (port_) & mask_;
+}
+
+void
+Gpio::input ()
+{
+ uint32_t mask = mask_;
+ uint32_t dmask = mask * mask;
+ GPIO_MODER (port_) &= ~(dmask | dmask << 1);
+}
+
+void
+Gpio::output ()
+{
+ uint32_t mask = mask_;
+ uint32_t dmask = mask * mask;
+ GPIO_MODER (port_) = (GPIO_MODER (port_) & ~(dmask << 1)) | dmask;
+}
+
+} // namespace ucoo