stm32g071b-disco: add OLED support

boards/arm/stm32f0l0g0/stm32g071b-disco/configs/oled/defconfig

@@ -0,0 +1,82 @@
+#
+# 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_LEDS is not set
+# CONFIG_EXAMPLES_NXLINES_DEFAULT_COLORS is not set
+# CONFIG_NSH_ARGCAT is not set
+# CONFIG_NX_DISABLE_1BPP is not set
+CONFIG_ARCH="arm"
+CONFIG_ARCH_BOARD="stm32g071b-disco"
+CONFIG_ARCH_BOARD_COMMON=y
+CONFIG_ARCH_BOARD_STM32G071B_DISCO=y
+CONFIG_ARCH_CHIP="stm32f0l0g0"
+CONFIG_ARCH_CHIP_STM32G071RB=y
+CONFIG_ARCH_CHIP_STM32G0=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_BOARD_LOOPSPERMSEC=2796
+CONFIG_BUILTIN=y
+CONFIG_DEBUG_FEATURES=y
+CONFIG_DEBUG_FULLOPT=y
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_DISABLE_ENVIRON=y
+CONFIG_DISABLE_MOUNTPOINT=y
+CONFIG_DISABLE_POSIX_TIMERS=y
+CONFIG_DISABLE_PSEUDOFS_OPERATIONS=y
+CONFIG_EXAMPLES_DJOYSTICK=y
+CONFIG_EXAMPLES_HELLO=y
+CONFIG_EXAMPLES_NXHELLO=y
+CONFIG_EXAMPLES_NXHELLO_BPP=1
+CONFIG_EXAMPLES_NXLINES=y
+CONFIG_EXAMPLES_NXLINES_BORDERWIDTH=1
+CONFIG_EXAMPLES_NXLINES_BPP=1
+CONFIG_EXAMPLES_NXLINES_LINECOLOR=0xff
+CONFIG_EXAMPLES_NXLINES_LINEWIDTH=1
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_INIT_STACKSIZE=1536
+CONFIG_INPUT=y
+CONFIG_INPUT_DJOYSTICK=y
+CONFIG_INTELHEX_BINARY=y
+CONFIG_LCD=y
+CONFIG_LCD_MAXCONTRAST=255
+CONFIG_LCD_RLANDSCAPE=y
+CONFIG_LCD_SSD1306_CUSTOM=y
+CONFIG_MM_SMALL=y
+CONFIG_MQ_MAXMSGSIZE=64
+CONFIG_NFILE_DESCRIPTORS_PER_BLOCK=6
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_FILEIOSIZE=64
+CONFIG_NSH_LINELEN=64
+CONFIG_NSH_READLINE=y
+CONFIG_NUNGET_CHARS=0
+CONFIG_NX=y
+CONFIG_NXFONTS_DISABLE_1BPP=y
+CONFIG_NXFONT_MONO5X8=y
+CONFIG_NX_BLOCKING=y
+CONFIG_PREALLOC_TIMERS=0
+CONFIG_PTHREAD_MUTEX_UNSAFE=y
+CONFIG_PTHREAD_STACK_DEFAULT=1536
+CONFIG_RAM_SIZE=32760
+CONFIG_RAM_START=0x20000000
+CONFIG_RAW_BINARY=y
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_WAITPID=y
+CONFIG_SPI_CMDDATA=y
+CONFIG_START_DAY=19
+CONFIG_START_MONTH=5
+CONFIG_START_YEAR=2013
+CONFIG_STDIO_DISABLE_BUFFERING=y
+CONFIG_STM32F0L0G0_PWR=y
+CONFIG_STM32F0L0G0_SPI1=y
+CONFIG_STM32F0L0G0_SPI1_COMMTYPE=1
+CONFIG_STM32F0L0G0_USART3=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_TASK_NAME_SIZE=0
+CONFIG_TASK_SPAWN_DEFAULT_STACKSIZE=1536
+CONFIG_TLS_NELEM=0
+CONFIG_USART3_SERIAL_CONSOLE=y
+CONFIG_USERLED=y
+CONFIG_USERLED_LOWER=y

boards/arm/stm32f0l0g0/stm32g071b-disco/include/board.h

@@ -171,7 +171,7 @@
  *   SPI1_SCK  - PA1
  */
 
-#undef  GPIO_SPI1_MISO                  /* Not used */
+#define GPIO_SPI1_MISO 0                /* Not used - simplex tx */
 #define GPIO_SPI1_MOSI GPIO_SPI1_MOSI_1 /* PA2 */
 #define GPIO_SPI1_SCK  GPIO_SPI1_SCK_1  /* PA1 */
 

boards/arm/stm32f0l0g0/stm32g071b-disco/src/Make.defs

@@ -31,10 +31,18 @@ ifeq ($(CONFIG_BOARDCTL),y)
 CSRCS += stm32_appinit.c
 endif
 
+ifeq ($(CONFIG_SPI),y)
+CSRCS += stm32_spi.c
+endif
+
 ifeq ($(CONFIG_INPUT_DJOYSTICK),y)
 CSRCS += stm32_djoystick.c
 endif
 
+ifeq ($(CONFIG_LCD_SSD1306),y)
+CSRCS += stm32_lcd_ssd1306.c
+endif
+
 DEPPATH += --dep-path board
 VPATH += :board
 CFLAGS += $(shell $(INCDIR) "$(CC)" $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)board$(DELIM)board)

boards/arm/stm32f0l0g0/stm32g071b-disco/src/stm32_bringup.c

@@ -83,6 +83,12 @@ int stm32_bringup(void)
   syslog(LOG_INFO, "Successfully registered the joystick driver\n");
 #endif
 
+#ifdef CONFIG_LCD_SSD1306_SPI
+  /* NOTE: SSD1315Z is compatible with the SSD1306 driver */
+
+  board_lcd_initialize();
+#endif
+
   UNUSED(ret);
   return OK;
 }

boards/arm/stm32f0l0g0/stm32g071b-disco/src/stm32_lcd_ssd1306.c

@@ -0,0 +1,101 @@
+/****************************************************************************
+ * boards/arm/stm32f0l0g0/stm32g071b-disco/src/stm32_lcd_ssd1306.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 <debug.h>
+
+#include <nuttx/board.h>
+#include <nuttx/lcd/lcd.h>
+#include <nuttx/lcd/ssd1306.h>
+
+#include "stm32_gpio.h"
+
+#include "stm32g071b-disco.h"
+
+#include "stm32_ssd1306.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define OLED_SPI_PORT         1 /* OLED display connected to SPI1 */
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_lcd_initialize
+ ****************************************************************************/
+
+int board_lcd_initialize(void)
+{
+  int ret;
+
+  /* Configure the OLED GPIOs. This initial configuration is RESET low,
+   * putting the OLED into reset state.
+   */
+
+  stm32_configgpio(GPIO_SSD1306_RST);
+  stm32_gpiowrite(GPIO_SSD1306_RST, 0);
+
+  /* Wait a bit then release the OLED from the reset state */
+
+  up_mdelay(20);
+  stm32_gpiowrite(GPIO_SSD1306_RST, 1);
+
+  /* Initialize OLED */
+
+  ret = board_ssd1306_initialize(OLED_SPI_PORT);
+  if (ret < 0)
+    {
+      lcderr("ERROR: Failed to initialize SSD1306\n");
+      return ret;
+    }
+
+  return OK;
+}
+
+/****************************************************************************
+ * Name: board_lcd_getdev
+ ****************************************************************************/
+
+struct lcd_dev_s *board_lcd_getdev(int devno)
+{
+  return board_ssd1306_getdev();
+}
+
+/****************************************************************************
+ * Name: board_lcd_uninitialize
+ ****************************************************************************/
+
+void board_lcd_uninitialize(void)
+{
+  /* TO-FIX */
+}

boards/arm/stm32f0l0g0/stm32g071b-disco/src/stm32_spi.c

@@ -0,0 +1,211 @@
+/****************************************************************************
+ * boards/arm/stm32f0l0g0/stm32g071b-disco/src/stm32_spi.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 <stdint.h>
+#include <stdbool.h>
+#include <debug.h>
+#include <errno.h>
+
+#include <nuttx/spi/spi.h>
+
+#include "stm32_gpio.h"
+#include "stm32_spi.h"
+
+#include <arch/board/board.h>
+
+#include "stm32g071b-disco.h"
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/* Global driver instances */
+
+#ifdef CONFIG_STM32F0L0G0_SPI1
+struct spi_dev_s *g_spi1;
+#endif
+#ifdef CONFIG_STM32F0L0G0_SPI2
+struct spi_dev_s *g_spi2;
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: stm32_spidev_initialize
+ *
+ * Description:
+ *   Called to configure SPI chip select GPIO pins for the Nucleo-F401RE and
+ *   Nucleo-F411RE boards.
+ *
+ ****************************************************************************/
+
+void weak_function stm32_spidev_initialize(void)
+{
+#ifdef CONFIG_STM32F0L0G0_SPI1
+  /* Configure SPI-based devices */
+
+  g_spi1 = stm32_spibus_initialize(1);
+  if (!g_spi1)
+    {
+      spierr("ERROR: FAILED to initialize SPI port 1\n");
+    }
+#endif
+
+#ifdef CONFIG_LCD_SSD1306_SPI
+  stm32_configgpio(GPIO_SSD1306_CS);    /* SSD1306 chip select */
+  stm32_configgpio(GPIO_SSD1306_CMD);   /* SSD1306 data/!command */
+#endif
+}
+
+/****************************************************************************
+ * Name:  stm32_spi1/2/3select and stm32_spi1/2/3status
+ *
+ * Description:
+ *   The external functions, stm32_spi1/2/3select and stm32_spi1/2/3status
+ *   must be provided by board-specific logic.  They are implementations of
+ *   the select and status methods of the SPI interface defined by struct
+ *   spi_ops_s (see include/nuttx/spi/spi.h). All other methods (including
+ *   stm32_spibus_initialize()) are provided by common STM32 logic. To use
+ *   this common SPI logic on your board:
+ *
+ *   1. Provide logic in stm32_boardinitialize() to configure SPI chip select
+ *      pins.
+ *   2. Provide stm32_spi1/2/3select() and stm32_spi1/2/3status() functions
+ *      in your board-specific logic.  These functions will perform chip
+ *      selection and status operations using GPIOs in the way your board is
+ *      configured.
+ *   3. Add a calls to stm32_spibus_initialize() in your low level
+ *      application initialization logic
+ *   4. The handle returned by stm32_spibus_initialize() may then be used to
+ *      bind the SPI driver to higher level logic (e.g., calling
+ *      mmcsd_spislotinitialize(), for example, will bind the SPI driver to
+ *      the SPI MMC/SD driver).
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_STM32F0L0G0_SPI1
+void stm32_spi1select(struct spi_dev_s *dev, uint32_t devid,
+                      bool selected)
+{
+  spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" :
+          "de-assert");
+
+#if defined(CONFIG_LCD_SSD1306_SPI)
+  if (devid == SPIDEV_DISPLAY(0))
+    {
+      stm32_gpiowrite(GPIO_SSD1306_CS, !selected);
+    }
+#endif
+}
+
+uint8_t stm32_spi1status(struct spi_dev_s *dev, uint32_t devid)
+{
+  return 0;
+}
+#endif
+
+#ifdef CONFIG_STM32F0L0G0_SPI2
+void stm32_spi2select(struct spi_dev_s *dev, uint32_t devid,
+                      bool selected)
+{
+  spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" :
+          "de-assert");
+}
+
+uint8_t stm32_spi2status(struct spi_dev_s *dev, uint32_t devid)
+{
+  return 0;
+}
+#endif
+
+#ifdef CONFIG_STM32F0L0G0_SPI3
+void stm32_spi3select(struct spi_dev_s *dev, uint32_t devid,
+                      bool selected)
+{
+  spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" :
+          "de-assert");
+}
+
+uint8_t stm32_spi3status(struct spi_dev_s *dev, uint32_t devid)
+{
+  return 0;
+}
+#endif
+
+/****************************************************************************
+ * Name: stm32_spi1cmddata
+ *
+ * Description:
+ *   Set or clear the SD1306 D/C n bit to select data (true) or command
+ *   (false). This function must be provided by platform-specific
+ *   logic. This is an implementation of the cmddata method of the SPI
+ *   interface defined by struct spi_ops_s (see include/nuttx/spi/spi.h).
+ *
+ * Input Parameters:
+ *
+ *   spi - SPI device that controls the bus the device that requires the CMD/
+ *         DATA selection.
+ *   devid - If there are multiple devices on the bus, this selects which one
+ *         to select cmd or data.  NOTE:  This design restricts, for example,
+ *         one one SPI display per SPI bus.
+ *   cmd - true: select command; false: select data
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_SPI_CMDDATA
+#ifdef CONFIG_STM32F0L0G0_SPI1
+int stm32_spi1cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd)
+{
+#if defined(CONFIG_LCD_SSD1306_SPI)
+  if (devid == SPIDEV_DISPLAY(0))
+    {
+      stm32_gpiowrite(GPIO_SSD1306_CMD, !cmd);
+    }
+#endif
+
+  return OK;
+}
+#endif
+
+#ifdef CONFIG_STM32F0L0G0_SPI2
+int stm32_spi2cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd)
+{
+  return OK;
+}
+#endif
+
+#ifdef CONFIG_STM32F0L0G0_SPI3
+int stm32_spi3cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd)
+{
+  return OK;
+}
+#endif
+#endif /* CONFIG_SPI_CMDDATA */

boards/arm/stm32f0l0g0/stm32g071b-disco/src/stm32g071b-disco.h

@@ -57,6 +57,17 @@
 #define GPIO_JOY_UP      (GPIO_INPUT | GPIO_PULLDOWN | GPIO_EXTI | \
                           GPIO_PORTC | GPIO_PIN4)
 
+/* OLED definitions *********************************************************/
+
+#define GPIO_SSD1306_CS    (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_HIGH | \
+                            GPIO_OUTPUT_SET | GPIO_PORTA | GPIO_PIN3)
+
+#define GPIO_SSD1306_CMD   (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_HIGH | \
+                            GPIO_OUTPUT_SET | GPIO_PORTA | GPIO_PIN7)
+
+#define GPIO_SSD1306_RST   (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_HIGH | \
+                            GPIO_OUTPUT_SET | GPIO_PORTA | GPIO_PIN6)
+
 /****************************************************************************
  * Public Data
  ****************************************************************************/
@@ -81,6 +92,16 @@
 
 int stm32_bringup(void);
 
+/****************************************************************************
+ * Name: stm32_spidev_initialize
+ *
+ * Description:
+ *   Called to configure SPI chip select GPIO pins.
+ *
+ ****************************************************************************/
+
+void stm32_spidev_initialize(void);
+
 /****************************************************************************
  * Name: stm32_djoy_initialization
  *