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-rw-r--r--digital/lcd/src/Makefile9
-rw-r--r--digital/lcd/src/lcd.cc224
-rw-r--r--digital/lcd/src/lcd.hh61
-rw-r--r--digital/lcd/src/main.cc47
4 files changed, 341 insertions, 0 deletions
diff --git a/digital/lcd/src/Makefile b/digital/lcd/src/Makefile
new file mode 100644
index 00000000..f6926f6d
--- /dev/null
+++ b/digital/lcd/src/Makefile
@@ -0,0 +1,9 @@
+BASE = ../../ucoolib
+
+TARGETS = stm32f4
+stm32f4_PROGS = lcd
+lcd_SOURCES = lcd.cc main.cc
+
+MODULES = hal/gpio utils
+
+include $(BASE)/build/top.mk
diff --git a/digital/lcd/src/lcd.cc b/digital/lcd/src/lcd.cc
new file mode 100644
index 00000000..f2171025
--- /dev/null
+++ b/digital/lcd/src/lcd.cc
@@ -0,0 +1,224 @@
+// {{{
+//
+// 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 "lcd.hh"
+#include "ucoolib/utils/delay.hh"
+
+LCD::LCD ()
+ : cs_ (GPIOB, 10), rs_ (GPIOB, 11), wr_ (GPIOC, 9), rd_ (GPIOC, 6),
+ reset_ (GPIOC, 7), bl_ (GPIOA, 8)
+{
+ // Setup GPIOs.
+ cs_.set (); rs_.set (); wr_.set (); rd_.set (); reset_.set ();
+ bl_.reset ();
+ gpio_mode_setup (GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,
+ GPIO0 | GPIO1 | GPIO2 | GPIO3 | GPIO4
+ | GPIO5 | GPIO6 | GPIO7 | GPIO8);
+ gpio_mode_setup (GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,
+ GPIO0 | GPIO1 | GPIO10 | GPIO11);
+ gpio_mode_setup (GPIOC, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,
+ GPIO0 | GPIO1 | GPIO2 | GPIO3 | GPIO4
+ | GPIO5 | GPIO6 | GPIO7 | GPIO9);
+ gpio_set_output_options (GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,
+ GPIO0 | GPIO1 | GPIO2 | GPIO3 | GPIO4
+ | GPIO5 | GPIO6 | GPIO7 | GPIO8);
+ gpio_set_output_options (GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,
+ GPIO0 | GPIO1 | GPIO10 | GPIO11);
+ gpio_set_output_options (GPIOC, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,
+ GPIO0 | GPIO1 | GPIO2 | GPIO3 | GPIO4
+ | GPIO5 | GPIO6 | GPIO7 | GPIO9);
+ // Initialisation.
+ // Reset pulse.
+ reset_.reset ();
+ ucoo::delay_ms (100);
+ reset_.set ();
+ // Read device code.
+ uint16_t device_code = read_reg (0);
+ ucoo::assert (device_code == 0x8989);
+ // Run manufacturer init code.
+ write_reg (0x0000, 0x0001); ucoo::delay_ms (50);
+ write_reg (0x0003, 0xa8a4); ucoo::delay_ms (50);
+ write_reg (0x000c, 0x0000); ucoo::delay_ms (50);
+ write_reg (0x000d, 0x080c); ucoo::delay_ms (50);
+ write_reg (0x000e, 0x2b00); ucoo::delay_ms (50);
+ write_reg (0x001e, 0x00b0); ucoo::delay_ms (50);
+ write_reg (0x0001, 0x2b3f); ucoo::delay_ms (50);
+ write_reg (0x0002, 0x0600); ucoo::delay_ms (50);
+ write_reg (0x0010, 0x0000); ucoo::delay_ms (50);
+ write_reg (0x0011, 0x6058); ucoo::delay_ms (50);
+ write_reg (0x0005, 0x0000); ucoo::delay_ms (50);
+ write_reg (0x0006, 0x0000); ucoo::delay_ms (50);
+ write_reg (0x0016, 0xef1c); ucoo::delay_ms (50);
+ write_reg (0x0017, 0x0003); ucoo::delay_ms (50);
+ write_reg (0x0007, 0x0133); ucoo::delay_ms (50);
+ write_reg (0x000b, 0x0000); ucoo::delay_ms (50);
+ write_reg (0x000f, 0x0000); ucoo::delay_ms (50);
+ write_reg (0x0041, 0x0000); ucoo::delay_ms (50);
+ write_reg (0x0042, 0x0000); ucoo::delay_ms (50);
+ write_reg (0x0048, 0x0000); ucoo::delay_ms (50);
+ write_reg (0x0049, 0x013f); ucoo::delay_ms (50);
+ write_reg (0x004a, 0x0000); ucoo::delay_ms (50);
+ write_reg (0x004b, 0x0000); ucoo::delay_ms (50);
+ write_reg (0x0044, 0xef00); ucoo::delay_ms (50);
+ write_reg (0x0045, 0x0000); ucoo::delay_ms (50);
+ write_reg (0x0046, 0x013f); ucoo::delay_ms (50);
+ write_reg (0x0030, 0x0707); ucoo::delay_ms (50);
+ write_reg (0x0031, 0x0204); ucoo::delay_ms (50);
+ write_reg (0x0032, 0x0204); ucoo::delay_ms (50);
+ write_reg (0x0033, 0x0502); ucoo::delay_ms (50);
+ write_reg (0x0034, 0x0507); ucoo::delay_ms (50);
+ write_reg (0x0035, 0x0204); ucoo::delay_ms (50);
+ write_reg (0x0036, 0x0204); ucoo::delay_ms (50);
+ write_reg (0x0037, 0x0502); ucoo::delay_ms (50);
+ write_reg (0x003a, 0x0302); ucoo::delay_ms (50);
+ write_reg (0x003b, 0x0302); ucoo::delay_ms (50);
+ write_reg (0x0023, 0x0000); ucoo::delay_ms (50);
+ write_reg (0x0024, 0x0000); ucoo::delay_ms (50);
+ write_reg (0x0025, 0x8000); ucoo::delay_ms (50);
+ write_reg (0x004f, 0);
+ write_reg (0x004e, 0);
+ // OK, display on.
+ rainbow ();
+ on ();
+}
+
+void
+LCD::on ()
+{
+ bl_.set ();
+}
+
+void
+LCD::off ()
+{
+ bl_.reset ();
+}
+
+void
+LCD::clear (uint16_t color)
+{
+ set_cursor (0, 0);
+ cs_.reset ();
+ write_index (0x0022);
+ for (int i = 0; i < x_max * y_max; i++)
+ write_data (color);
+ cs_.set ();
+}
+
+void
+LCD::rainbow ()
+{
+ set_cursor (0, 0);
+ cs_.reset ();
+ write_index (0x0022);
+ for (int y = 0; y < y_max; y++)
+ for (int x = 0; x < x_max; x++)
+ {
+ int r = x * 0xff / (x_max - 1);
+ int g = y * 0xff / (y_max - 1);
+ int b = 0xff - r;
+ write_data (color (r, g, b));
+ }
+ cs_.set ();
+}
+
+
+void
+LCD::set_cursor (int x, int y)
+{
+ write_reg (0x004e, y);
+ write_reg (0x004f, x_max - 1 - x);
+}
+
+void
+LCD::write_index (uint16_t index)
+{
+ rs_.reset ();
+ GPIOC_ODR = (GPIOC_ODR & ~0x3f) | (index & 0x3f);
+ GPIOA_ODR = (GPIOA_ODR & ~0xff) | ((index >> 6) & 0xff);
+ GPIOB_ODR = (GPIOB_ODR & ~0x3) | ((index >> 14) & 0x3);
+ wr_.reset ();
+ wr_.set ();
+}
+
+void
+LCD::write_data (uint16_t data)
+{
+ rs_.set ();
+ GPIOC_ODR = (GPIOC_ODR & ~0x3f) | (data & 0x3f);
+ GPIOA_ODR = (GPIOA_ODR & ~0xff) | ((data >> 6) & 0xff);
+ GPIOB_ODR = (GPIOB_ODR & ~0x3) | ((data >> 14) & 0x3);
+ wr_.reset ();
+ wr_.set ();
+}
+
+uint16_t
+LCD::read_data ()
+{
+ uint16_t value;
+ gpio_mode_setup (GPIOA, GPIO_MODE_INPUT, GPIO_PUPD_NONE,
+ GPIO0 | GPIO1 | GPIO2 | GPIO3 | GPIO4
+ | GPIO5 | GPIO6 | GPIO7);
+ gpio_mode_setup (GPIOB, GPIO_MODE_INPUT, GPIO_PUPD_NONE,
+ GPIO0 | GPIO1);
+ gpio_mode_setup (GPIOC, GPIO_MODE_INPUT, GPIO_PUPD_NONE,
+ GPIO0 | GPIO1 | GPIO2 | GPIO3 | GPIO4
+ | GPIO5);
+ rs_.set ();
+ rd_.reset ();
+ ucoo::delay_us (1);
+ value = (GPIOC_IDR & 0x3f)
+ | ((GPIOA_IDR & 0xff) << 6)
+ | ((GPIOB_IDR & 0x3) << 14);
+ rd_.set ();
+ gpio_mode_setup (GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,
+ GPIO0 | GPIO1 | GPIO2 | GPIO3 | GPIO4
+ | GPIO5 | GPIO6 | GPIO7);
+ gpio_mode_setup (GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,
+ GPIO0 | GPIO1);
+ gpio_mode_setup (GPIOC, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,
+ GPIO0 | GPIO1 | GPIO2 | GPIO3 | GPIO4
+ | GPIO5);
+ return value;
+}
+
+void
+LCD::write_reg (uint16_t index, uint16_t data)
+{
+ cs_.reset ();
+ write_index (index);
+ write_data (data);
+ cs_.set ();
+}
+
+uint16_t
+LCD::read_reg (uint16_t index)
+{
+ uint16_t data;
+ cs_.reset ();
+ write_index (index);
+ data = read_data ();
+ cs_.set ();
+ return data;
+}
+
diff --git a/digital/lcd/src/lcd.hh b/digital/lcd/src/lcd.hh
new file mode 100644
index 00000000..e054c2e5
--- /dev/null
+++ b/digital/lcd/src/lcd.hh
@@ -0,0 +1,61 @@
+#ifndef lcd_hh
+#define lcd_hh
+// {{{
+//
+// 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/common.hh"
+#include "ucoolib/hal/gpio/gpio.hh"
+
+/// Control LCD.
+class LCD
+{
+ public:
+ static const int x_max = 320, y_max = 240;
+ public:
+ /// Constructor.
+ LCD ();
+ /// Turn display on.
+ void on ();
+ /// Turn display off.
+ void off ();
+ /// Clear the whole screen with the same color (default to black).
+ void clear (uint16_t color = 0);
+ /// Fill screen with colors.
+ void rainbow ();
+ /// Convert from RGB to hardware color format.
+ static inline uint16_t color (uint8_t r, uint8_t g, uint8_t b)
+ {
+ return (r >> 3 << 11) | (g >> 2 << 5) | (b >> 3);
+ }
+ private:
+ void set_cursor (int x, int y);
+ void write_index (uint16_t index);
+ void write_data (uint16_t data);
+ uint16_t read_data ();
+ void write_reg (uint16_t index, uint16_t data);
+ uint16_t read_reg (uint16_t index);
+ private:
+ ucoo::Gpio cs_, rs_, wr_, rd_, reset_, bl_;
+};
+
+#endif // lcd_hh
diff --git a/digital/lcd/src/main.cc b/digital/lcd/src/main.cc
new file mode 100644
index 00000000..ec7441b1
--- /dev/null
+++ b/digital/lcd/src/main.cc
@@ -0,0 +1,47 @@
+// {{{
+//
+// 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 "lcd.hh"
+
+#include "ucoolib/arch/arch.hh"
+#include "ucoolib/utils/delay.hh"
+#include <libopencm3/stm32/f4/rcc.h>
+
+int
+main (int argc, const char **argv)
+{
+ ucoo::arch_init (argc, argv);
+ rcc_peripheral_enable_clock (&RCC_AHB1ENR, RCC_AHB1ENR_IOPAEN
+ | RCC_AHB1ENR_IOPBEN | RCC_AHB1ENR_IOPCEN);
+ LCD lcd;
+ ucoo::delay (1);
+ lcd.clear (LCD::color (255, 0, 0));
+ ucoo::delay (1);
+ lcd.clear (LCD::color (0, 255, 0));
+ ucoo::delay (1);
+ lcd.clear (LCD::color (0, 0, 255));
+ ucoo::delay (1);
+ lcd.rainbow ();
+ while (1)
+ ;
+}