arch/arm/src/lpc54xx: Add reset logic. Some changes while debugging LDC. Does not yet work (hangs).

arch/arm/src/lpc54xx/Make.defs

@@ -81,7 +81,7 @@ endif
 
 CHIP_ASRCS  =
 CHIP_CSRCS  = lpc54_start.c lpc54_clockconfig.c lpc54_irq.c lpc54_clrpend.c
-CHIP_CSRCS += lpc54_allocateheap.c lpc54_lowputc.c lpc54_gpio.c
+CHIP_CSRCS += lpc54_allocateheap.c lpc54_lowputc.c lpc54_gpio.c lpc54_reset.c
 
 ifneq ($(CONFIG_SCHED_TICKLESS),y)
 CHIP_CSRCS += lpc54_timerisr.c

arch/arm/src/lpc54xx/chip/lpc54_syscon.h

@@ -819,12 +819,11 @@
 
 /* Asynchronous system configuration */
 
-/* Async peripheral reset control */
+/* Async peripheral reset control, set, and clear registers */
-#define SYSCON_ASYNCPRESETCTRL_
+
-/* Set bits in ASYNCPRESETCTRL */
+#define SYSCON_ASYNCPRESET_CTIMER3             (1 << 13) /* Bit 13:  CTIMER3 reset control */
-#define SYSCON_ASYNCPRESETCTRLSET_
+#define SYSCON_ASYNCPRESET_CTIMER4             (1 << 14) /* Bit 14:  CTIMER4 reset control */
-/* Clear bits in ASYNCPRESETCTRL */
+
-#define SYSCON_ASYNCPRESETCTRLCLR_
 /* Async peripheral clock control */
 #define SYSCON_ASYNCAPBCLKCTRL_
 /* Set bits in ASYNCAPBCLKCTRL  */

arch/arm/src/lpc54xx/lpc54_emc.c

@@ -54,6 +54,7 @@
 
 #include "chip/lpc54_syscon.h"
 #include "chip/lpc54_emc.h"
+#include "lpc54_reset.h"
 #include "lpc54_emc.h"
 
 #ifdef CONFIG_LPC54_EMC
@@ -240,8 +241,7 @@ void lpc54_emc_initialize(FAR const struct emc_config_s *config)
 
   /* Reset the EMC */
 
-  putreg32(SYSCON_PRESETCTRL2_EMC, LPC54_SYSCON_PRESETCTRLSET2);
+  lpc54_reset_emc();
-  putreg32(SYSCON_PRESETCTRL2_EMC, LPC54_SYSCON_PRESETCTRLCLR2);
 
   /* Set the EMC sytem configure */
 

arch/arm/src/lpc54xx/lpc54_lcd.c

@@ -53,6 +53,7 @@
 #include "chip/lpc54_syscon.h"
 #include "chip/lpc54_pinmux.h"
 #include "lpc54_gpio.h"
+#include "lpc54_reset.h"
 #include "lpc54_lcd.h"
 
 #include <arch/board/board.h>
@@ -192,10 +193,6 @@ struct fb_vtable_s g_fbobject =
 #endif
 };
 
-/****************************************************************************
- * Public Data
- ****************************************************************************/
-
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
@@ -534,6 +531,12 @@ int up_fbinitialize(int display)
   lpc54_gpio_config(GPIO_LCD_CLKIN); /* Optional clock input */
 #endif
 
+  lcdinfo("Enable clocking to the LCD controller\n");
+
+  /* Enable clocking to the LCD peripheral */
+
+  putreg32(SYSCON_AHBCLKCTRL2_LCD, LPC54_SYSCON_AHBCLKCTRLSET2);
+
   /* Route Main clock (or LCK CLKIN) to the LCD. */
 
 #ifdef CONFIG_LPC54_LCD_USE_CLKIN
@@ -542,6 +545,10 @@ int up_fbinitialize(int display)
   putreg32(SYSCON_LCDCLKSEL_MAINCLK, LPC54_SYSCON_LCDCLKSEL);
 #endif
 
+  /* Reset the LCD */
+
+  lpc54_reset_lcd();
+
   lcdinfo("Configuring the LCD controller\n");
 
   /* Disable the cursor */
@@ -558,7 +565,7 @@ int up_fbinitialize(int display)
 
   putreg32(0, LPC54_LCD_CTRL);
 
-  /* Initialize pixel clock */
+  /* Initialize pixel clock.  Set the LCD clock divier. */
 
 #ifdef CONFIG_LPC54_LCD_USE_CLKIN
   lcddiv = ((uint32_t)CONFIG_LPC54_LCD_CLKIN_FREQUENCY /
@@ -707,7 +714,9 @@ int up_fbinitialize(int display)
   putreg32(0, LPC54_LCD_INTMSK);
   lcdinfo("Enabling the display\n");
 
-  for (i = LPC54_LCD_PWREN_DELAY; i; i--);
+  for (i = LPC54_LCD_PWREN_DELAY; i; i--)
+    {
+    }
 
   /* Enable LCD */
 
@@ -717,7 +726,9 @@ int up_fbinitialize(int display)
 
   /* Enable LCD power */
 
-  for (i = LPC54_LCD_PWREN_DELAY; i; i--);
+  for (i = LPC54_LCD_PWREN_DELAY; i; i--)
+    {
+    }
 
   regval  = getreg32(LPC54_LCD_CTRL);
   regval |= LCD_CTRL_LCDPWR;
@@ -793,7 +804,9 @@ void up_fbuninitialize(int display)
   regval &= ~LCD_CTRL_LCDPWR;
   putreg32(regval, LPC54_LCD_CTRL);
 
-  for (i = LPC54_LCD_PWRDIS_DELAY; i; i--);
+  for (i = LPC54_LCD_PWRDIS_DELAY; i; i--)
+    {
+    }
 
   regval &= ~LCD_CTRL_LCDEN;
   putreg32(regval, LPC54_LCD_CTRL);
@@ -801,6 +814,10 @@ void up_fbuninitialize(int display)
   /* Turn off clocking to the LCD. modifyreg32() can do this atomically. */
 
   putreg32(SYSCON_LCDCLKSEL_NONE, LPC54_SYSCON_LCDCLKSEL);
+
+  /* Disable clocking to the LCD peripheral */
+
+  putreg32(SYSCON_AHBCLKCTRL2_LCD, LPC54_SYSCON_AHBCLKCTRLCLR2);
 }
 
 /****************************************************************************

arch/arm/src/lpc54xx/lpc54_reset.c

@@ -0,0 +1,79 @@
+/****************************************************************************
+ * arch/arm/src/lpc54/lpc54_reset.c
+ *
+ *   Copyright (C) 2017 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include "up_arch.h"
+#include "lpc54_reset.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: lpc54_reset
+ *
+ * Description:
+ *   Reset the selected peripheral
+ *
+ ****************************************************************************/
+
+void lpc54_reset(uintptr_t setreg, uintptr_t clrreg,
+                 uintptr_t statreg, uint32_t mask)
+{
+  /* Set the bit to put the peripheral in reset */
+
+  putreg32(mask, setreg);
+
+  /* Wait until the peripheral is in reset */
+
+  while ((getreg32(statreg) & mask) == 0)
+    {
+    }
+
+  /* Clear the bit to take the peripheral out of reset */
+
+  putreg32(mask, clrreg);
+
+  /* Wait until the peripheral is out of reset */
+
+  while ((getreg32(statreg) & mask) != 0)
+    {
+    }
+}

arch/arm/src/lpc54xx/lpc54_reset.h

@@ -0,0 +1,139 @@
+/****************************************************************************
+ * arch/arm/src/lpc54xx/lpc54_reset.h
+ *
+ *   Copyright (C) 2017 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_ARM_SRC_LPC54XX_LPC54_RESET_H
+#define __ARCH_ARM_SRC_LPC54XX_LPC54_RESET_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define lpc54_reset_peripheral0(m) \
+  lpc54_reset(LPC54_SYSCON_PRESETCTRLSET0, LPC54_SYSCON_PRESETCTRLCLR0, \
+              LPC54_SYSCON_PRESETCTRL0, (m))
+
+#define lpc54_reset_peripheral1(m) \
+  lpc54_reset(LPC54_SYSCON_PRESETCTRLSET1, LPC54_SYSCON_PRESETCTRLCLR1, \
+              LPC54_SYSCON_PRESETCTRL1, (m))
+
+#define lpc54_reset_peripheral2(m) \
+  lpc54_reset(LPC54_SYSCON_PRESETCTRLSET2, LPC54_SYSCON_PRESETCTRLCLR2, \
+              LPC54_SYSCON_PRESETCTRL2, (m))
+
+#define lpc54_reset_async_peripheral(m) \
+  lpc54_reset(LPC54_SYSCON_ASYNCPRESETCTRLSET, LPC54_SYSCON_ASYNCPRESETCTRLCLR, \
+              LPC54_SYSCON_ASYNCPRESETCTRL, (m))
+
+#define lpc54_reset_flash()     lpc54_reset_peripheral0(SYSCON_PRESETCTRL0_FLASH)
+#define lpc54_reset_fmc()       lpc54_reset_peripheral0(SYSCON_PRESETCTRL0_FMC)
+#define lpc54_reset_eeprom()    lpc54_reset_peripheral0(SYSCON_PRESETCTRL0_EEPROM)
+#define lpc54_reset_spifi()     lpc54_reset_peripheral0(SYSCON_PRESETCTRL0_SPIFI)
+#define lpc54_reset_inputmux()  lpc54_reset_peripheral0(SYSCON_PRESETCTRL0_INPUTMUX)
+#define lpc54_reset_iocon()     lpc54_reset_peripheral0(SYSCON_PRESETCTRL0_IOCON)
+#define lpc54_reset_gpio0()     lpc54_reset_peripheral0(SYSCON_PRESETCTRL0_GPIO0)
+#define lpc54_reset_gpio1()     lpc54_reset_peripheral0(SYSCON_PRESETCTRL0_GPIO1)
+#define lpc54_reset_gpio2()     lpc54_reset_peripheral0(SYSCON_PRESETCTRL0_GPIO2)
+#define lpc54_reset_gpio3()     lpc54_reset_peripheral0(SYSCON_PRESETCTRL0_GPIO3)
+#define lpc54_reset_pint()      lpc54_reset_peripheral0(SYSCON_PRESETCTRL0_PINT)
+#define lpc54_reset_gint()      lpc54_reset_peripheral0(SYSCON_PRESETCTRL0_GINT)
+#define lpc54_reset_dma()       lpc54_reset_peripheral0(SYSCON_PRESETCTRL0_DMA)
+#define lpc54_reset_crc()       lpc54_reset_peripheral0(SYSCON_PRESETCTRL0_CRC)
+#define lpc54_reset_wwdt()      lpc54_reset_peripheral0(SYSCON_PRESETCTRL0_WWDT)
+#define lpc54_reset_rtc()       lpc54_reset_peripheral0(SYSCON_PRESETCTRL0_RTC)
+#define lpc54_reset_adc0()      lpc54_reset_peripheral0(SYSCON_PRESETCTRL0_ADC0)
+
+#define lpc54_reset_mrt()       lpc54_reset_peripheral1(SYSCON_PRESETCTRL1_MRT)
+#define lpc54_reset_sct0()      lpc54_reset_peripheral1(SYSCON_PRESETCTRL1_SCT0)
+#define lpc54_reset_mcan0()     lpc54_reset_peripheral1(SYSCON_PRESETCTRL1_MCAN0)
+#define lpc54_reset_mcan1()     lpc54_reset_peripheral1SYSCON_PRESETCTRL1_MCAN1)
+#define lpc54_reset_utick()     lpc54_reset_peripheral1(SYSCON_PRESETCTRL1_UTICK)
+#define lpc54_reset_flexcomm0() lpc54_reset_peripheral1(SYSCON_PRESETCTRL1_FLEXCOMM0)
+#define lpc54_reset_flexcomm1() lpc54_reset_peripheral1(SYSCON_PRESETCTRL1_FLEXCOMM1)
+#define lpc54_reset_flexcomm2() lpc54_reset_peripheral1(SYSCON_PRESETCTRL1_FLEXCOMM2)
+#define lpc54_reset_flexcomm3() lpc54_reset_peripheral1(SYSCON_PRESETCTRL1_FLEXCOMM3)
+#define lpc54_reset_flexcomm4() lpc54_reset_peripheral1(SYSCON_PRESETCTRL1_FLEXCOMM4)
+#define lpc54_reset_flexcomm5() lpc54_reset_peripheral1(SYSCON_PRESETCTRL1_FLEXCOMM5)
+#define lpc54_reset_flexcomm6() lpc54_reset_peripheral1(SYSCON_PRESETCTRL1_FLEXCOMM6)
+#define lpc54_reset_flexcomm7() lpc54_reset_peripheral1(SYSCON_PRESETCTRL1_FLEXCOMM7)
+#define lpc54_reset_dmic()      lpc54_reset_peripheral1(SYSCON_PRESETCTRL1_DMIC)
+#define lpc54_reset_ctimer2()   lpc54_reset_peripheral1(SYSCON_PRESETCTRL1_CTIMER2)
+#define lpc54_reset_usb0d()     lpc54_reset_peripheral1(SYSCON_PRESETCTRL1_USB0D)
+#define lpc54_reset_ctimer0()   lpc54_reset_peripheral1(SYSCON_PRESETCTRL1_CTIMER0)
+#define lpc54_reset_ctimer1()   lpc54_reset_peripheral1(SYSCON_PRESETCTRL1_CTIMER1)
+
+#define lpc54_reset_lcd()       lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_LCD)
+#define lpc54_reset_sdio()      lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_SDIO)
+#define lpc54_reset_usb1h()     lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_USB1H)
+#define lpc54_reset_usb1d()     lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_USB1D)
+#define lpc54_reset_usb1ram()   lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_USB1RAM)
+#define lpc54_reset_emc()       lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_EMC)
+#define lpc54_reset_eth()       lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_ETH)
+#define lpc54_reset_gpio4()     lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_GPIO4)
+#define lpc54_reset_gpio5()     lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_GPIO5)
+#define lpc54_reset_otp()       lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_OTP)
+#define lpc54_reset_rng()       lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_RNG)
+#define lpc54_reset_flexcomm8() lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_FLEXCOMM8)
+#define lpc54_reset_flexcomm9() lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_FLEXCOMM9)
+#define lpc54_reset_usb0hmr()   lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_USB0HMR)
+#define lpc54_reset_usb0hsl()   lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_USB0HSL)
+#define lpc54_reset_sha()       lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_SHA)
+#define lpc54_reset_sc0()       lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_SC0)
+#define lpc54_reset_sc1()       lpc54_reset_peripheral2(SYSCON_PRESETCTRL2_SC1)
+
+#define lpc54_reset_ctimer3()   lpc54_reset_async_peripheral(SYSCON_ASYNCPRESET_CTIMER3)
+#define lpc54_reset_ctimer4()   lpc54_reset_async_peripheral(SYSCON_ASYNCPRESET_CTIMER4)
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: lpc54_reset
+ *
+ * Description:
+ *   Reset the selected peripheral
+ *
+ ****************************************************************************/
+
+void lpc54_reset(uintptr_t setreg, uintptr_t clrreg,
+                 uintptr_t statreg, uint32_t mask);
+
+#endif /* __ARCH_ARM_SRC_LPC54XX_LPC54_RESET_H */

configs/lpcxpresso-lpc54628/README.txt

@@ -40,9 +40,8 @@ STATUS
     minor clock source setting).  That port required modifications only
     for differences in some SYSCON and pin-related settings.
   2017-12-13:  Created the fb configuration for testing the LCD.  Only
-    minimal testing has been performed.  As of this writing, there is
+    minimal testing has been performed.  As of this writing, the system
-    no video output from the apps/examples/fb test:  The backlight is on
+    hangs while initializing the LCD.
-    but the display is blank/white.
 
 Configurations
 ==============