boards/arm/stm32/nucleo-f446re: added support for ili9225 display

Signed-off-by: Michal Lenc <michallenc@seznam.cz>

boards/arm/stm32/nucleo-f446re/README.txt

@@ -558,3 +558,18 @@ Configurations
 
     Functionality of CAN driver can be tested by calling application
     "can" in NuttShell. This application sends 100 messages over CAN 1.
+
+  lcd:
+  ----
+    This is basically an nsh configuration (see above) with added support
+    of ILI9225 176x220 TFT display and test framebuffer application.
+
+    Display connection is set to SPI 3 and pinout is following:
+
+    CS    D8
+    RST   D6
+    RS    D7
+    SDA   D4
+    CLK   D3
+
+    Framebuffer application can be started from terminal by typing "fb".

boards/arm/stm32/nucleo-f446re/configs/lcd/defconfig

@@ -0,0 +1,63 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+# CONFIG_ARCH_FPU is not set
+# CONFIG_NSH_ARGCAT is not set
+# CONFIG_NSH_CMDOPT_HEXDUMP is not set
+# CONFIG_NSH_CMDPARMS is not set
+# CONFIG_NSH_DISABLE_IFCONFIG is not set
+# CONFIG_NSH_DISABLE_PS is not set
+# CONFIG_STM32_FLASH_PREFETCH is not set
+CONFIG_ARCH="arm"
+CONFIG_ARCH_BOARD="nucleo-f446re"
+CONFIG_ARCH_BOARD_NUCLEO_F446RE=y
+CONFIG_ARCH_BUTTONS=y
+CONFIG_ARCH_CHIP="stm32"
+CONFIG_ARCH_CHIP_STM32=y
+CONFIG_ARCH_CHIP_STM32F446R=y
+CONFIG_ARCH_INTERRUPTSTACK=2048
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_BOARD_LATE_INITIALIZE=y
+CONFIG_BOARD_LOOPSPERMSEC=8499
+CONFIG_BUILTIN=y
+CONFIG_DRIVERS_VIDEO=y
+CONFIG_EXAMPLES_FB=y
+CONFIG_HAVE_CXX=y
+CONFIG_HAVE_CXXINITIALIZE=y
+CONFIG_INTELHEX_BINARY=y
+CONFIG_LCD=y
+CONFIG_LCD_FRAMEBUFFER=y
+CONFIG_LCD_ILI9225=y
+CONFIG_LCD_PORTRAIT=y
+CONFIG_MAX_TASKS=16
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_FILEIOSIZE=512
+CONFIG_NSH_LINELEN=64
+CONFIG_NSH_READLINE=y
+CONFIG_PREALLOC_TIMERS=4
+CONFIG_RAM_SIZE=131072
+CONFIG_RAM_START=0x20000000
+CONFIG_RAW_BINARY=y
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_WAITPID=y
+CONFIG_SDCLONE_DISABLE=y
+CONFIG_SPI_CMDDATA=y
+CONFIG_START_DAY=14
+CONFIG_START_MONTH=10
+CONFIG_START_YEAR=2014
+CONFIG_STM32_CRC=y
+CONFIG_STM32_JTAG_SW_ENABLE=y
+CONFIG_STM32_OTGFS=y
+CONFIG_STM32_PWR=y
+CONFIG_STM32_SPI3=y
+CONFIG_STM32_USART2=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_TASK_NAME_SIZE=0
+CONFIG_TESTING_OSTEST=y
+CONFIG_USART2_SERIAL_CONSOLE=y
+CONFIG_USER_ENTRYPOINT="nsh_main"
+CONFIG_VIDEO_FB=y

boards/arm/stm32/nucleo-f446re/include/board.h

@@ -300,6 +300,10 @@
 #define GPIO_SPI2_MOSI   GPIO_SPI2_MOSI_1
 #define GPIO_SPI2_SCK    GPIO_SPI2_SCK_2
 
+#define GPIO_SPI3_MISO   GPIO_SPI3_MISO_1
+#define GPIO_SPI3_MOSI   GPIO_SPI3_MOSI_1
+#define GPIO_SPI3_SCK    GPIO_SPI3_SCK_1
+
 /* CAN */
 
 #define GPIO_CAN1_RX     GPIO_CAN1_RX_2

boards/arm/stm32/nucleo-f446re/src/Make.defs

@@ -32,6 +32,10 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS +=  stm32_buttons.c
 endif
 
+ifeq ($(CONFIG_LCD_ILI9225),y)
+CSRCS +=  stm32_ili9225.c
+endif
+
 ifeq ($(CONFIG_ADC),y)
 CSRCS += stm32_adc.c
 ifeq ($(CONFIG_INPUT_AJOYSTICK),y)

boards/arm/stm32/nucleo-f446re/src/nucleo-f446re.h

@@ -58,6 +58,8 @@
 #  undef HAVE_MMCSD
 #endif
 
+#define HAVE_LCD 1
+
 /* LED.  User LD2: the green LED is a user LED connected to Arduino signal
  * D13 corresponding to MCU I/O PA5 (pin 21) or PB13 (pin 34) depending on
  * the STM32 target.
@@ -125,6 +127,15 @@
      GPIO_OUTPUT_SET | GPIO_PORTB | GPIO_PIN5)
 #endif
 
+#ifdef HAVE_LCD
+#define GPIO_LCD_CS  (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_2MHz | \
+                      GPIO_OUTPUT_SET | GPIO_PORTA | GPIO_PIN9)
+#define GPIO_LCD_RST (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_2MHz | \
+                      GPIO_OUTPUT_SET | GPIO_PORTB | GPIO_PIN10)
+#define GPIO_LCD_RS  (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_2MHz | \
+                      GPIO_OUTPUT_SET | GPIO_PORTA | GPIO_PIN8)
+#endif
+
 /* Devices on the onboard bus.
  *
  * Note that these are unshifted addresses.
@@ -220,6 +231,9 @@ extern struct spi_dev_s *g_spi1;
 #ifdef CONFIG_STM32_SPI2
 extern struct spi_dev_s *g_spi2;
 #endif
+#ifdef CONFIG_STM32_SPI3
+extern struct spi_dev_s *g_spi3;
+#endif
 #ifdef HAVE_MMCSD
 extern struct sdio_dev_s *g_sdio;
 #endif

boards/arm/stm32/nucleo-f446re/src/stm32_bringup.c

@@ -47,6 +47,10 @@
 #include "board_qencoder.h"
 #endif
 
+#ifdef CONFIG_VIDEO_FB
+#include <nuttx/video/fb.h>
+#endif
+
 #include "nucleo-f446re.h"
 
 /****************************************************************************
@@ -132,6 +136,16 @@ int stm32_bringup(void)
     }
 #endif
 
+#ifdef CONFIG_VIDEO_FB
+  /* Initialize and register the framebuffer driver */
+
+  ret  = fb_register(0, 0);
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "ERROR: fb_register() failed %d\n", ret);
+    }
+#endif
+
 #ifdef CONFIG_SENSORS_QENCODER
   /* Initialize and register the qencoder driver */
 

boards/arm/stm32/nucleo-f446re/src/stm32_ili9225.c

@@ -0,0 +1,125 @@
+/****************************************************************************
+ * boards/arm/stm32/nucleo-f446re/src/stm32_ili9225.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <debug.h>
+#include <errno.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/board.h>
+#include <nuttx/spi/spi.h>
+#include <nuttx/lcd/lcd.h>
+#include <nuttx/lcd/ili9225.h>
+
+#include "stm32_spi.h"
+#include "nucleo-f446re.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define LCD_SPI_PORTNO 3
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static struct spi_dev_s *g_spidev;
+static struct lcd_dev_s *g_lcd = NULL;
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name:  board_lcd_initialize
+ *
+ * Description:
+ *   Initialize the LCD video hardware.  The initial state of the LCD is
+ *   fully initialized, display memory cleared, and the LCD ready to use, but
+ *   with the power setting at 0 (full off).
+ *
+ ****************************************************************************/
+
+int board_lcd_initialize(void)
+{
+  stm32_configgpio(GPIO_LCD_RST);
+
+  g_spidev = stm32_spibus_initialize(LCD_SPI_PORTNO);
+  if (!g_spidev)
+    {
+      lcderr("ERROR: Failed to initialize SPI port %d\n", LCD_SPI_PORTNO);
+      return -ENODEV;
+    }
+
+  stm32_gpiowrite(GPIO_LCD_RST, 0);
+  up_mdelay(1);
+  stm32_gpiowrite(GPIO_LCD_RST, 1);
+  up_mdelay(120);
+
+  return OK;
+}
+
+/****************************************************************************
+ * Name:  board_lcd_getdev
+ *
+ * Description:
+ *   Return a a reference to the LCD object for the specified LCD.  This
+ *   allows support for multiple LCD devices.
+ *
+ ****************************************************************************/
+
+FAR struct lcd_dev_s *board_lcd_getdev(int devno)
+{
+  g_lcd = ili9225_lcdinitialize(g_spidev);
+  if (!g_lcd)
+    {
+      lcderr("ERROR: Failed to bind SPI port 3 to LCD %d\n", devno);
+    }
+  else
+    {
+      lcdinfo("SPI port 3 bound to LCD %d\n", devno);
+      return g_lcd;
+    }
+
+  return NULL;
+}
+
+/****************************************************************************
+ * Name:  board_lcd_uninitialize
+ *
+ * Description:
+ *   Uninitialize the LCD support
+ *
+ ****************************************************************************/
+
+void board_lcd_uninitialize(void)
+{
+  /* Turn the display off */
+
+  g_lcd->setpower(g_lcd, 0);
+}

boards/arm/stm32/nucleo-f446re/src/stm32_spi.c

@@ -53,6 +53,9 @@ struct spi_dev_s *g_spi1;
 #ifdef CONFIG_STM32_SPI2
 struct spi_dev_s *g_spi2;
 #endif
+#ifdef CONFIG_STM32_SPI3
+struct spi_dev_s *g_spi3;
+#endif
 
 /****************************************************************************
  * Public Functions
@@ -88,6 +91,18 @@ void weak_function stm32_spidev_initialize(void)
 
   g_spi2 = stm32_spibus_initialize(2);
 #endif
+
+#ifdef CONFIG_STM32_SPI3
+  /* Configure SPI-based devices */
+
+  g_spi3 = stm32_spibus_initialize(3);
+
+#ifdef HAVE_LCD
+  stm32_configgpio(GPIO_LCD_CS);
+  stm32_configgpio(GPIO_LCD_RS);
+#endif
+
+#endif
 }
 
 /****************************************************************************
@@ -157,6 +172,10 @@ void stm32_spi3select(FAR struct spi_dev_s *dev, uint32_t devid,
 {
   spiinfo("devid: %d CS: %s\n",
           (int)devid, selected ? "assert" : "de-assert");
+
+#ifdef HAVE_LCD
+      stm32_gpiowrite(GPIO_LCD_CS, !selected);
+#endif
 }
 
 uint8_t stm32_spi3status(FAR struct spi_dev_s *dev, uint32_t devid)
@@ -206,7 +225,8 @@ int stm32_spi2cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
 #ifdef CONFIG_STM32_SPI3
 int stm32_spi3cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
 {
-  return OK;
+      stm32_gpiowrite(GPIO_LCD_RS, !cmd);
+      return OK;
 }
 #endif
 #endif /* CONFIG_SPI_CMDDATA */