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+// 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/hal/i2c/i2c_hard.hh"
+#include "ucoolib/hal/i2c/i2c_slave_data_buffer.hh"
+
+#include "ucoolib/arch/arch.hh"
+#include "ucoolib/hal/gpio/gpio.hh"
+#include "ucoolib/utils/delay.hh"
+#include "ucoolib/base/test/test.hh"
+
+#include <libopencm3/stm32/f4/rcc.h>
+
+#include <algorithm>
+#include <cstring>
+
+static const int buffer_size = 16;
+static const int margin = 5;
+static const uint8_t a1 = 0x2c, a2 = 0x2e;
+
+void
+test_basic (ucoo::TestSuite &tsuite, ucoo::I2cMaster &m,
+ ucoo::I2cSlaveDataBuffer &d, uint8_t addr)
+{
+ tsuite.group ("basic");
+ {
+ ucoo::Test test (tsuite, "recv");
+ // Slave is not able to signal its buffer end. Extra bytes will be
+ // read as 0xff.
+ const char *hello = "Hello world!";
+ char buf[buffer_size + margin];
+ d.update (hello, std::strlen (hello) + 1);
+ char ref[buffer_size + margin];
+ std::copy (hello, hello + std::strlen (hello) + 1, ref);
+ std::fill (ref + std::strlen (hello) + 1, ref + sizeof (ref), 0xff);
+ for (int len = 2; len < (int) sizeof (buf); len++)
+ {
+ std::fill (buf, buf + sizeof (buf), 42);
+ m.recv (addr, buf, len);
+ int r = m.wait ();
+ test_fail_break_unless (test, r == len);
+ test_fail_break_unless (test, std::equal (buf, buf + len, ref));
+ test_fail_break_unless (test, std::count (buf, buf + sizeof (buf), 42)
+ == (int) sizeof (buf) - len);
+ }
+ }
+ {
+ ucoo::Test test (tsuite, "send");
+ // Slave is supposed to signal when it received enough data, but this
+ // is not implemented.
+ char buf[buffer_size + margin];
+ for (int len = 1; len < (int) sizeof (buf); len++)
+ {
+ int r;
+ // Before transfer, no data.
+ r = d.poll (buf, sizeof (buf));
+ test_fail_break_unless (test, r == 0);
+ // Send data.
+ char c = '0' + len % 10;
+ std::fill (buf, buf + len, c);
+ m.send (addr, buf, len);
+ r = m.wait ();
+ test_fail_break_unless (test, r == len);
+ // Let some time for slave to finish reception.
+ ucoo::delay_ms (1);
+ // Check what is received.
+ r = d.poll (buf, sizeof (buf));
+ test_fail_break_unless (test, r == std::min (len, buffer_size));
+ test_fail_break_unless (test, std::count (buf, buf + r, c) == r);
+ }
+ }
+}
+
+int
+main (int argc, const char **argv)
+{
+ ucoo::arch_init (argc, argv);
+ ucoo::TestSuite tsuite ("i2c");
+ // I2C1: B6: SCL, B9: SDA
+ // I2C3: A8: SCL, C9: SDA
+ rcc_peripheral_enable_clock (&RCC_AHB1ENR, RCC_AHB1ENR_IOPAEN);
+ rcc_peripheral_enable_clock (&RCC_AHB1ENR, RCC_AHB1ENR_IOPBEN);
+ rcc_peripheral_enable_clock (&RCC_AHB1ENR, RCC_AHB1ENR_IOPCEN);
+ gpio_mode_setup (GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO6 | GPIO9);
+ gpio_mode_setup (GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO8);
+ gpio_mode_setup (GPIOC, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO9);
+ gpio_set_output_options (GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_2MHZ, GPIO6 | GPIO9);
+ gpio_set_output_options (GPIOA, GPIO_OTYPE_OD, GPIO_OSPEED_2MHZ, GPIO8);
+ gpio_set_output_options (GPIOC, GPIO_OTYPE_OD, GPIO_OSPEED_2MHZ, GPIO9);
+ gpio_set_af (GPIOB, GPIO_AF4, GPIO6 | GPIO9);
+ gpio_set_af (GPIOA, GPIO_AF4, GPIO8);
+ gpio_set_af (GPIOC, GPIO_AF4, GPIO9);
+ ucoo::I2cSlaveDataBufferSize<16, 16> data1, data2;
+ ucoo::I2cHard i2c1 (0, true);
+ ucoo::I2cHard i2c2 (2, true);
+ i2c1.register_data (a1, data1);
+ i2c2.register_data (a2, data2);
+ // Run tests.
+ test_basic (tsuite, i2c1, data2, a2);
+ test_basic (tsuite, i2c2, data1, a1);
+ return tsuite.report () ? 0 : 1;
+}