added st7735 LCD based support

added st7735 LCD based support

boards/arm/rp2040/common/src/Make.defs

@@ -38,6 +38,10 @@ ifeq ($(CONFIG_LCD_ST7789),y)
 CSRCS += rp2040_st7789.c
 endif
 
+ifeq ($(CONFIG_LCD_ST7735),y)
+CSRCS += rp2040_st7735.c
+endif
+
 ifeq ($(CONFIG_USBMSC),y)
 CSRCS += rp2040_usbmsc.c
 endif

boards/arm/rp2040/common/src/rp2040_st7735.c

@@ -0,0 +1,149 @@
+/****************************************************************************
+ * boards/arm/rp2040/common/src/rp2040_st7735.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/st7735.h>
+
+#include "rp2040_spi.h"
+#include "rp2040_gpio.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define LCD_SPI_PORTNO 1
+
+#if LCD_SPI_PORTNO
+#define LCD_DC         CONFIG_RP2040_SPI1_GPIO
+#define LCD_RST        10
+#define LCD_BL         11
+#else
+#define LCD_DC         CONFIG_RP2040_SPI0_GPIO
+#endif
+
+/****************************************************************************
+ * 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)
+{
+  g_spidev = rp2040_spibus_initialize(LCD_SPI_PORTNO);
+  if (!g_spidev)
+    {
+      lcderr("ERROR: Failed to initialize SPI port %d\n", LCD_SPI_PORTNO);
+      return -ENODEV;
+    }
+
+  /* SPI RX is not used. Same pin is used as LCD Data/Command control */
+
+  rp2040_gpio_init(LCD_DC);
+  rp2040_gpio_setdir(LCD_DC, true);
+  rp2040_gpio_put(LCD_DC, true);
+
+#if LCD_SPI_PORTNO
+
+  /* Pull LCD_RESET high */
+
+  rp2040_gpio_init(LCD_RST);
+  rp2040_gpio_setdir(LCD_RST, true);
+  rp2040_gpio_put(LCD_RST, true);
+
+  /* Set full brightness */
+
+  rp2040_gpio_init(LCD_BL);
+  rp2040_gpio_setdir(LCD_BL, true);
+  rp2040_gpio_put(LCD_BL, true);
+
+#endif
+
+  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 = st7735_lcdinitialize(g_spidev);
+  if (!g_lcd)
+    {
+      lcderr("ERROR: Failed to bind SPI port %d to LCD %d\n", LCD_SPI_PORTNO,
+      devno);
+    }
+  else
+    {
+      lcdinfo("SPI port %d bound to LCD %d\n", LCD_SPI_PORTNO, 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/rp2040/raspberrypi-pico/README.txt

@@ -106,6 +106,19 @@ Defconfigs
        DAT1          (NC)
     * Card hot swapping is not supported.
 
+- st7735
+    st7735 SPI LCD support      
+    Connection:
+      st7735         Raspberry Pi Pico
+           GND ----- GND             (Pin 3 or 38 or ...)
+           VCC ----- 5V Vbus         (Pin 40)
+           SDA ----- GP15 (SPI1 TX)  (Pin 20)
+           SCK ----- GP14 (SPI1 SCK) (Pin 19)
+            CS ----- GP13 (SPI1 CSn) (Pin 17)
+       AO(D/C) ----- GP12 (SPI1 RX)  (Pin 16)
+            BL ----- GP11            (Pin 15)
+         RESET ----- GP10            (Pin 14)  
+
 - enc28j60
     ENC28J60 SPI ethernet controller support
       - IP address is configured by DHCP.

boards/arm/rp2040/raspberrypi-pico/configs/st7735/defconfig

@@ -0,0 +1,62 @@
+#
+# 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_FS_PROCFS_EXCLUDE_ENVIRON is not set
+# CONFIG_LIBC_LONG_LONG is not set
+# CONFIG_NSH_ARGCAT is not set
+# CONFIG_NSH_CMDOPT_HEXDUMP is not set
+# CONFIG_NSH_DISABLE_DATE is not set
+# CONFIG_NSH_DISABLE_LOSMART is not set
+# CONFIG_NSH_DISABLE_PRINTF is not set
+# CONFIG_NSH_DISABLE_TRUNCATE is not set
+# CONFIG_STANDARD_SERIAL is not set
+CONFIG_ARCH="arm"
+CONFIG_ARCH_BOARD="raspberrypi-pico"
+CONFIG_ARCH_BOARD_RASPBERRYPI_PICO=y
+CONFIG_ARCH_CHIP="rp2040"
+CONFIG_ARCH_CHIP_RP2040=y
+CONFIG_ARCH_RAMVECTORS=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_BOARDCTL_RESET=y
+CONFIG_BOARD_LOOPSPERMSEC=10450
+CONFIG_BUILTIN=y
+CONFIG_DEBUG_FULLOPT=y
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_DISABLE_POSIX_TIMERS=y
+CONFIG_DRIVERS_VIDEO=y
+CONFIG_EXAMPLES_FB=y
+CONFIG_EXAMPLES_HELLO=y
+CONFIG_FS_PROCFS=y
+CONFIG_FS_PROCFS_REGISTER=y
+CONFIG_LCD=y
+CONFIG_LCD_FRAMEBUFFER=y
+CONFIG_LCD_PORTRAIT=y
+CONFIG_LCD_ST7735=y
+CONFIG_NFILE_DESCRIPTORS_PER_BLOCK=6
+CONFIG_NSH_ARCHINIT=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_READLINE=y
+CONFIG_RAM_SIZE=270336
+CONFIG_RAM_START=0x20000000
+CONFIG_READLINE_CMD_HISTORY=y
+CONFIG_RP2040_SPI1=y
+CONFIG_RP2040_SPI1_GPIO=12
+CONFIG_RP2040_SPI=y
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_WAITPID=y
+CONFIG_SDCLONE_DISABLE=y
+CONFIG_SPI_CMDDATA=y
+CONFIG_START_DAY=9
+CONFIG_START_MONTH=2
+CONFIG_START_YEAR=2021
+CONFIG_SYSLOG_CONSOLE=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_TESTING_GETPRIME=y
+CONFIG_TESTING_OSTEST=y
+CONFIG_UART0_SERIAL_CONSOLE=y
+CONFIG_USER_ENTRYPOINT="nsh_main"
+CONFIG_VIDEO_FB=y

boards/arm/rp2040/raspberrypi-pico/src/rp2040_spi.c

@@ -131,7 +131,7 @@ uint8_t rp2040_spi1status(FAR struct spi_dev_s *dev, uint32_t devid)
 #ifdef CONFIG_SPI_CMDDATA
 int rp2040_spi1cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
 {
-#ifdef CONFIG_LCD_ST7789
+#if defined (CONFIG_LCD_ST7789) || (CONFIG_LCD_ST7735)
   if (devid == SPIDEV_DISPLAY(0))
     {
       /*  This is the Data/Command control pad which determines whether the