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-rw-r--r--digital/ucoolib/ucoolib/hal/spi/Module1
-rw-r--r--digital/ucoolib/ucoolib/hal/spi/spi_soft.cc125
-rw-r--r--digital/ucoolib/ucoolib/hal/spi/spi_soft.hh62
-rw-r--r--digital/ucoolib/ucoolib/hal/spi/test/Makefile9
-rw-r--r--digital/ucoolib/ucoolib/hal/spi/test/test_spi.cc111
5 files changed, 308 insertions, 0 deletions
diff --git a/digital/ucoolib/ucoolib/hal/spi/Module b/digital/ucoolib/ucoolib/hal/spi/Module
new file mode 100644
index 00000000..a6df136f
--- /dev/null
+++ b/digital/ucoolib/ucoolib/hal/spi/Module
@@ -0,0 +1 @@
+hal_spi_SOURCES := spi_soft.cc
diff --git a/digital/ucoolib/ucoolib/hal/spi/spi_soft.cc b/digital/ucoolib/ucoolib/hal/spi/spi_soft.cc
new file mode 100644
index 00000000..af5ac124
--- /dev/null
+++ b/digital/ucoolib/ucoolib/hal/spi/spi_soft.cc
@@ -0,0 +1,125 @@
+// 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 "spi_soft.hh"
+
+#include "ucoolib/utils/delay.hh"
+#include "ucoolib/common.hh"
+
+namespace ucoo {
+
+SpiSoftMaster::SpiSoftMaster (Io &sck, Io &mosi, Io &miso, int speed,
+ SpiMode mode)
+ : sck_ (sck), mosi_ (mosi), miso_ (miso)
+{
+ setup (speed, mode);
+}
+
+SpiSoftMaster::~SpiSoftMaster ()
+{
+ setup (0);
+}
+
+void
+SpiSoftMaster::setup (int speed, SpiMode mode)
+{
+ if (speed)
+ {
+ // Take pins ownership, set SCK according to CPOL.
+ sck_.set (mode >= SPI_MODE_2);
+ sck_.output ();
+ mosi_.reset ();
+ mosi_.output ();
+ miso_.input ();
+ // Set clock period and clock phase.
+ half_period_ns_ = 1000 * 1000 * 1000 / 2 / speed;
+ cpha_ = mode & 1;
+ }
+ else
+ {
+ // Release pins.
+ sck_.input ();
+ sck_.reset ();
+ mosi_.input ();
+ }
+}
+
+void
+SpiSoftMaster::send_and_recv (const char *tx_buf, char *rx_buf, int count)
+{
+ while (count--)
+ *rx_buf++ = send_and_recv (*tx_buf++);
+}
+
+char
+SpiSoftMaster::send_and_recv (char tx)
+{
+ uint8_t i, rx = 0;
+ // Depending on clock phase, sample is done on first transition or second
+ // transition.
+ for (i = 0x80; i; i >>= 1)
+ {
+ // Setup stage.
+ if (cpha_)
+ sck_.toggle ();
+ mosi_.set (tx & i);
+ delay_ns (half_period_ns_);
+ // Sample stage.
+ sck_.toggle ();
+ if (miso_.get ())
+ rx |= i;
+ delay_ns (half_period_ns_);
+ // SCK toggle for next setup stage.
+ if (!cpha_)
+ sck_.toggle ();
+ }
+ return rx;
+}
+
+void
+SpiSoftMaster::send (const char *tx_buf, int count)
+{
+ while (count--)
+ send (*tx_buf++);
+}
+
+void
+SpiSoftMaster::send (char tx)
+{
+ send_and_recv (tx);
+}
+
+void
+SpiSoftMaster::recv (char *rx_buf, int count)
+{
+ while (count--)
+ *rx_buf++ = recv ();
+}
+
+char
+SpiSoftMaster::recv ()
+{
+ return send_and_recv (0);
+}
+
+} // namespace ucoo
diff --git a/digital/ucoolib/ucoolib/hal/spi/spi_soft.hh b/digital/ucoolib/ucoolib/hal/spi/spi_soft.hh
new file mode 100644
index 00000000..dcf0441d
--- /dev/null
+++ b/digital/ucoolib/ucoolib/hal/spi/spi_soft.hh
@@ -0,0 +1,62 @@
+#ifndef ucoolib_hal_spi_spi_soft_hh
+#define ucoolib_hal_spi_spi_soft_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/spi_master.hh"
+#include "ucoolib/intf/io.hh"
+
+namespace ucoo {
+
+/// Software implementation of a SPI master.
+class SpiSoftMaster : public SpiMaster
+{
+ public:
+ /// Constructor, need all SPI pins. Speed is given in Hz.
+ SpiSoftMaster (Io &sck, Io &mosi, Io &miso, int speed = 0,
+ SpiMode mode = SPI_MODE_0);
+ /// Destructor, release SPI pins.
+ ~SpiSoftMaster ();
+ /// Change settings, use speed 0 to stop.
+ void setup (int speed, SpiMode mode = SPI_MODE_0);
+ /// See SpiMaster::send_and_recv.
+ void send_and_recv (const char *tx_buf, char *rx_buf, int count);
+ /// Send and receive one byte.
+ char send_and_recv (char tx);
+ /// See SpiMaster::send.
+ void send (const char *tx_buf, int count);
+ /// Send one byte.
+ void send (char tx);
+ /// See SpiMaster::recv.
+ void recv (char *rx_buf, int count);
+ /// Receive one byte.
+ char recv ();
+ private:
+ Io &sck_, &mosi_, &miso_;
+ int half_period_ns_;
+ bool cpha_;
+};
+
+} // namespace ucoo
+
+#endif // ucoolib_hal_spi_spi_soft_hh
diff --git a/digital/ucoolib/ucoolib/hal/spi/test/Makefile b/digital/ucoolib/ucoolib/hal/spi/test/Makefile
new file mode 100644
index 00000000..76b82304
--- /dev/null
+++ b/digital/ucoolib/ucoolib/hal/spi/test/Makefile
@@ -0,0 +1,9 @@
+BASE = ../../../..
+
+TARGETS = stm32f4
+PROGS = test_spi
+test_spi_SOURCES = test_spi.cc
+
+MODULES = hal/spi hal/gpio utils base/test hal/usb
+
+include $(BASE)/build/top.mk
diff --git a/digital/ucoolib/ucoolib/hal/spi/test/test_spi.cc b/digital/ucoolib/ucoolib/hal/spi/test/test_spi.cc
new file mode 100644
index 00000000..4814f921
--- /dev/null
+++ b/digital/ucoolib/ucoolib/hal/spi/test/test_spi.cc
@@ -0,0 +1,111 @@
+// 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/spi/spi_soft.hh"
+#include "ucoolib/hal/gpio/gpio.hh"
+#include "ucoolib/utils/delay.hh"
+
+#include "ucoolib/arch/arch.hh"
+#include "ucoolib/base/test/test.hh"
+
+#include <libopencm3/stm32/f4/rcc.h>
+
+#include <algorithm>
+#include <cstdio>
+
+int
+main (int argc, const char **argv)
+{
+ ucoo::arch_init (argc, argv);
+ ucoo::Stream &ts = ucoo::test_stream ();
+ // Use connection to LIS302DL device on discovery board.
+ rcc_peripheral_enable_clock (&RCC_AHB1ENR, RCC_AHB1ENR_IOPAEN
+ | RCC_AHB1ENR_IOPEEN);
+ ucoo::Gpio ss (GPIOE, 3);
+ ss.set ();
+ gpio_mode_setup (GPIOE, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO3);
+ ucoo::Gpio sck (GPIOA, 5), mosi (GPIOA, 7), miso (GPIOA, 6);
+ ucoo::SpiSoftMaster spi (sck, mosi, miso, 1000000, ucoo::SPI_MODE_3);
+ // Loop with simple IU.
+ char buf[64];
+ unsigned int r;
+ int8_t x, y, z;
+ while (1)
+ {
+ ucoo::delay_ms (200);
+ // Read X, Y, Z.
+ ss.reset ();
+ spi.send (0xe9);
+ x = spi.recv ();
+ spi.recv ();
+ y = spi.recv ();
+ spi.recv ();
+ z = spi.recv ();
+ ss.set ();
+ ucoo::delay_ns (100);
+ r = snprintf (buf, sizeof (buf), "x: %4d, y: %4d, z: %4d\r", x, y, z);
+ r = std::min (sizeof (buf) - 1, r);
+ ts.write (buf, r);
+ // Simple UI.
+ while (ts.poll ())
+ {
+ char c = ts.getc ();
+ switch (c)
+ {
+ case '?':
+ static const char help[] =
+ "\n? - help\n"
+ "w - who am I\n"
+ "o - turn on\n"
+ "f - turn off\n";
+ ts.write (help, sizeof (help));
+ break;
+ case 'w':
+ {
+ // Read Who am I register.
+ ss.reset ();
+ spi.send (0x8f);
+ char rsp = spi.recv ();
+ ss.set ();
+ ucoo::delay_ns (100);
+ // Report result.
+ r = snprintf (buf, sizeof (buf), "\nI am 0x%02x\n",
+ static_cast<unsigned char> (rsp));
+ r = std::min (sizeof (buf) - 1, r);
+ ts.write (buf, r);
+ }
+ break;
+ case 'o':
+ case 'f':
+ {
+ char cmd[] = { 0x20, c == 'o' ? 0x47 : 0x07 };
+ ss.reset ();
+ spi.send (cmd, sizeof (cmd));
+ ss.set ();
+ ucoo::delay_ns (100);
+ }
+ break;
+ }
+ }
+ }
+}