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authorNicolas Schodet2015-06-03 13:46:44 +0200
committerNicolas Schodet2019-10-07 00:44:44 +0200
commit574480980dcffbfa7cd6dbe71e88253eb4c9feba (patch)
tree5f1c1261341a7c2a56de01d8c6d0815b164be8ba /ucoo/hal/i2c/i2c_slave_data_buffer.cc
parentd415a0646e874848cd06482c5d57916cca5cff4a (diff)
Rename ucoolib modules directory from ucoolib to ucoo
Diffstat (limited to 'ucoo/hal/i2c/i2c_slave_data_buffer.cc')
-rw-r--r--ucoo/hal/i2c/i2c_slave_data_buffer.cc80
1 files changed, 80 insertions, 0 deletions
diff --git a/ucoo/hal/i2c/i2c_slave_data_buffer.cc b/ucoo/hal/i2c/i2c_slave_data_buffer.cc
new file mode 100644
index 0000000..1ba3a3a
--- /dev/null
+++ b/ucoo/hal/i2c/i2c_slave_data_buffer.cc
@@ -0,0 +1,80 @@
+// ucoolib - Microcontroller object oriented library. {{{
+//
+// Copyright (C) 2013 Nicolas Schodet
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+//
+// }}}
+#include "i2c_slave_data_buffer.hh"
+
+#include <algorithm>
+
+namespace ucoo {
+
+I2cSlaveDataBuffer::I2cSlaveDataBuffer (char *send_buf, int send_size,
+ char *recv_buf, int recv_size)
+ : send_buf_ (send_buf), send_size_ (send_size), send_count_ (0),
+ recv_buf_ (recv_buf), recv_size_ (recv_size), recv_count_ (0)
+{
+}
+
+void
+I2cSlaveDataBuffer::update (const char *buf, int count)
+{
+ int r = std::min (count, send_size_);
+ irq_flags_t flags = irq_lock ();
+ std::copy (buf, buf + r, send_buf_);
+ send_count_ = r;
+ irq_restore (flags);
+}
+
+int
+I2cSlaveDataBuffer::poll (char *buf, int count)
+{
+ // Test to avoid superfluous irq lock. This is not a problem if
+ // condition become false before irq is locked.
+ if (recv_count_)
+ {
+ irq_flags_t flags = irq_lock ();
+ int r = std::min (count, recv_count_);
+ recv_count_ = 0;
+ std::copy (recv_buf_, recv_buf_ + r, buf);
+ irq_restore (flags);
+ return r;
+ }
+ else return 0;
+}
+
+int
+I2cSlaveDataBuffer::to_send (char *buf, int count)
+{
+ int r = std::min (count, send_count_);
+ std::copy (send_buf_, send_buf_ + r, buf);
+ return r;
+}
+
+void
+I2cSlaveDataBuffer::to_recv (const char *buf, int count)
+{
+ int r = std::min (count, recv_size_);
+ std::copy (buf, buf + r, recv_buf_);
+ recv_count_ = r;
+}
+
+} // namespace ucoo