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+#ifndef ucoolib_hal_i2c_i2c_hard_stm32_hh
+#define ucoolib_hal_i2c_i2c_hard_stm32_hh
+// 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 "ucoolib/intf/i2c.hh"
+
+#include "config/hal/i2c.hh"
+
+namespace ucoo {
+
+/// I2C interface, using dedicated hardware.
+class I2cHard : public I2c
+{
+ public:
+ /// Initialise the Nth I2C.
+ I2cHard (int n, bool enable, int speed = 100000);
+ /// Shutdown.
+ ~I2cHard ();
+ /// Enable or disable.
+ void setup (bool enable, int speed = 100000);
+ /// See I2cMaster::send.
+ void send (uint8_t addr, const char *buf, int count);
+ /// See I2cMaster::recv.
+ void recv (uint8_t addr, char *buf, int count);
+ /// See I2cMaster::status.
+ int status ();
+ /// See I2cMaster::wait.
+ int wait ();
+ /// See I2cSlave::register_data.
+ void register_data (uint8_t addr, DataHandler &data_handler);
+ /// Event ISR.
+ static void ev_isr (int n);
+ /// Error ISR.
+ static void er_isr (int n);
+ private:
+ /// Start a master transfer, send or recv, depending on addr LSB.
+ void transfer (uint8_t addr, char *buf, int count);
+ private:
+ /// I2C number.
+ int n_;
+ /// Is it enabled?
+ bool enable_;
+ /// Slave address.
+ uint8_t slave_addr_;
+ /// Handler called to source or sink data for slave exchanges.
+ DataHandler *slave_data_handler_;
+ /// Slave buffer.
+ char slave_buf_[UCOO_CONFIG_HAL_I2C_SLAVE_BUFFER_SIZE];
+ /// Current buffer count (bytes to send), or buffer size (available room).
+ int buf_count_;
+ /// Current buffer index (position to read byte to send or write received
+ /// byte).
+ int buf_index_;
+ /// Master access granted.
+ bool master_;
+ /// Current master transfer status.
+ int master_status_;
+ /// Current master transfer buffer.
+ char *master_buf_;
+ /// Current master transfer size, copied to buf_count_ when active.
+ int master_count_;
+ /// Current master transfer slave address, LSB is set for receiver mode.
+ uint8_t master_slave_addr_;
+};
+
+} // namespace ucoo
+
+#endif // ucoolib_hal_i2c_i2c_hard_stm32_hh