From 60259b544fa5dea73fc9c746bb46f1b74bd7055c Mon Sep 17 00:00:00 2001 From: patacongo Date: Fri, 12 Aug 2011 22:10:48 +0000 Subject: [PATCH] Add Kinesis watchdog, ramfuncs, idle loop, start of clock configuration git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3875 42af7a65-404d-4744-a932-0658087f49c3 --- arch/arm/src/common/up_internal.h | 30 ++++- arch/arm/src/kinetis/Make.defs | 8 +- arch/arm/src/kinetis/kinetis_clrpend.c | 104 +++++++++++++++++ arch/arm/src/kinetis/kinetis_idle.c | 104 +++++++++++++++++ arch/arm/src/kinetis/kinetis_internal.h | 16 ++- arch/arm/src/kinetis/kinetis_mcg.c | 139 ++++++++++++++++++++++ arch/arm/src/kinetis/kinetis_sim.h | 146 ++++++++++++------------ arch/arm/src/kinetis/kinetis_start.c | 31 ++++- arch/arm/src/kinetis/kinetis_wdog.c | 117 +++++++++++++++++++ 9 files changed, 610 insertions(+), 85 deletions(-) create mode 100755 arch/arm/src/kinetis/kinetis_clrpend.c create mode 100755 arch/arm/src/kinetis/kinetis_idle.c create mode 100644 arch/arm/src/kinetis/kinetis_mcg.c create mode 100644 arch/arm/src/kinetis/kinetis_wdog.c diff --git a/arch/arm/src/common/up_internal.h b/arch/arm/src/common/up_internal.h index 43c8bbeeb5..108dbd2ac6 100644 --- a/arch/arm/src/common/up_internal.h +++ b/arch/arm/src/common/up_internal.h @@ -147,7 +147,35 @@ extern uint32_t _sdata; /* Start of .data */ extern uint32_t _edata; /* End+1 of .data */ extern uint32_t _sbss; /* Start of .bss */ extern uint32_t _ebss; /* End+1 of .bss */ -#endif + +/* Sometimes, functions must be executed from RAM. In this case, the following + * macro may be used (with GCC!) to specify a function that will execute from + * RAM. For example, + * + * int __ramfunc__ foo (void); + * int __ramfunc__ foo (void) { return bar; } + * + * will create a function named foo that will execute from RAM. + */ + +#ifdef CONFIG_BOOT_RAMFUNCS + +# define __ramfunc__ __attribute__ ((section(".ramfunc"))) + +/* Functions decleared in the .ramfunc section will be packaged together + * by the linker script and stored in FLASH. During boot-up, the start + * logic must include logic to copy the RAM functions from their storage + * location in FLASH to their correct destination in SRAM. The following + * following linker-defined values provide the information to copy the + * functions from flash to RAM. + */ + +extern const uint32_t _framfuncs; /* Copy source address in FLASH */ +extern uint32_t _sramfuncs; /* Copy destination start address in RAM */ +extern uint32_t _eramfuncs; /* Copy destination start address in RAM */ + +#endif /* CONFIG_BOOT_RAMFUNCS */ +#endif /* __ASSEMBLY__ */ /**************************************************************************** * Inline Functions diff --git a/arch/arm/src/kinetis/Make.defs b/arch/arm/src/kinetis/Make.defs index bdf5739dff..8f2c67aa1f 100644 --- a/arch/arm/src/kinetis/Make.defs +++ b/arch/arm/src/kinetis/Make.defs @@ -1,7 +1,7 @@ ############################################################################ # arch/arm/src/kinetis/Make.defs # -# Copyright (C) 2010-2011 Gregory Nutt. All rights reserved. +# Copyright (C) 2011 Gregory Nutt. All rights reserved. # Author: Gregory Nutt # # Redistribution and use in source and binary forms, with or without @@ -57,10 +57,10 @@ endif # Required Kinetis files CHIP_ASRCS = -#CHIP_CSRCS = kinetis_allocateheap.c kinetis_can.c kinetis_clockconfig.c \ -# kinetis_clrpend.c kinetis_gpio.c kinetis_idle.c kinetis_lowputc.c \ +#CHIP_CSRCS = kinetis_allocateheap.c kinetis_can.c kinetis_gpio.c kinetis_lowputc.c \ # kinetis_serial.c kinetis_spi.c kinetis_ssp.c kinetis_timerisr.c -CHIP_CSRCS = kinetis_irq.c kinetis_start.c +CHIP_CSRCS = kinetis_clrpend.c kinetis_idle.c kinetis_irq.c kinetis_mcg.c kinetis_start.c \ + kinetis_wdog.c # Configuration-dependent Kinetis files diff --git a/arch/arm/src/kinetis/kinetis_clrpend.c b/arch/arm/src/kinetis/kinetis_clrpend.c new file mode 100755 index 0000000000..98997bf2ed --- /dev/null +++ b/arch/arm/src/kinetis/kinetis_clrpend.c @@ -0,0 +1,104 @@ +/**************************************************************************** + * arch/arm/src/kinetis/kinetis_clrpend.c + * arch/arm/src/chip/kinetis_clrpend.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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 + +#include + +#include "nvic.h" +#include "up_arch.h" +#include "kinetis_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: kinetis_clrpend + * + * Description: + * Clear a pending interrupt at the NVIC. This does not seem to be required + * for most interrupts. Don't know why... + * + * I keep it in a separate file so that it will not increase the footprint + * on Kinetis platforms that do not need this function. + * + ****************************************************************************/ + +void kinetis_clrpend(int irq) +{ + /* Check for external interrupt */ + + if (irq >= KINETIS_IRQ_EXTINT) + { + if (irq < (KINETIS_IRQ_EXTINT+32)) + { + putreg32(1 << (irq - KINETIS_IRQ_EXTINT), NVIC_IRQ0_31_CLRPEND); + } + else if (irq < (KINETIS_IRQ_EXTINT+64)) + { + putreg32(1 << (irq - KINETIS_IRQ_EXTINT - 32), NVIC_IRQ32_63_CLRPEND); + } + else if (irq < (KINETIS_IRQ_EXTINT+96)) + { + putreg32(1 << (irq - KINETIS_IRQ_EXTINT - 64), NVIC_IRQ64_95_CLRPEND); + } + else if (irq < NR_IRQS) + { + putreg32(1 << (irq - KINETIS_IRQ_EXTINT - 96), NVIC_IRQ96_127_CLRPEND); + } + } +} diff --git a/arch/arm/src/kinetis/kinetis_idle.c b/arch/arm/src/kinetis/kinetis_idle.c new file mode 100755 index 0000000000..8fc914f3f4 --- /dev/null +++ b/arch/arm/src/kinetis/kinetis_idle.c @@ -0,0 +1,104 @@ +/**************************************************************************** + * arch/arm/src/kinetis/kinetis_idle.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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 +#include + +#include +#include "up_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/* Does the board support an IDLE LED to indicate that the board is in the + * IDLE state? + */ + +#if defined(CONFIG_ARCH_LEDS) && defined(LED_IDLE) +# define BEGIN_IDLE() up_ledon(LED_IDLE) +# define END_IDLE() up_ledoff(LED_IDLE) +#else +# define BEGIN_IDLE() +# define END_IDLE() +#endif + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_idle + * + * Description: + * up_idle() is the logic that will be executed when their is no other + * ready-to-run task. This is processor idle time and will continue until + * some interrupt occurs to cause a context switch from the idle task. + * + * Processing in this state may be processor-specific. e.g., this is where + * power management operations might be performed. + * + ****************************************************************************/ + +void up_idle(void) +{ +#if defined(CONFIG_SUPPRESS_INTERRUPTS) || defined(CONFIG_SUPPRESS_TIMER_INTS) + /* If the system is idle and there are no timer interrupts, then process + * "fake" timer interrupts. Hopefully, something will wake up. + */ + + sched_process_timer(); +#else + + /* Sleep until an interrupt occurs to save power */ + + BEGIN_IDLE(); + asm("WFI"); + END_IDLE(); +#endif +} + diff --git a/arch/arm/src/kinetis/kinetis_internal.h b/arch/arm/src/kinetis/kinetis_internal.h index 9174700319..8f6a911a3c 100644 --- a/arch/arm/src/kinetis/kinetis_internal.h +++ b/arch/arm/src/kinetis/kinetis_internal.h @@ -290,9 +290,9 @@ extern "C" { * Name: kinetis_clockconfig * * Description: - * Called to initialize the KINETIS. This does whatever setup is needed to put the - * MCU in a usable state. This includes the initialization of clocking using the - * settings in board.h. + * Called to initialize the Kinetis chip. This does whatever setup is needed to + * put the MCU in a usable state. This includes the initialization of clocking + * using the settings in board.h. * ************************************************************************************/ @@ -310,6 +310,16 @@ EXTERN void kinetis_clockconfig(void); EXTERN void kinetis_lowsetup(void); +/************************************************************************************ + * Name: kinetis_wddisable + * + * Description: + * Disable the watchdog timer + * + ************************************************************************************/ + +EXTERN void kinetis_wddisable(void); + /************************************************************************************ * Name: kinetis_gpioirqinitialize * diff --git a/arch/arm/src/kinetis/kinetis_mcg.c b/arch/arm/src/kinetis/kinetis_mcg.c new file mode 100644 index 0000000000..c02b0a49c1 --- /dev/null +++ b/arch/arm/src/kinetis/kinetis_mcg.c @@ -0,0 +1,139 @@ +/**************************************************************************** + * arch/arm/src/kinetis/kinetis_mcg.c + * arch/arm/src/chip/kinetis_mcg.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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 + +#include "up_arch.h" + +#include "kinetis_internal.h" +#include "kinetis_mcg.h" +#include "kinetis_sim.h" +#include "kinetis_fmc.h" + +/**************************************************************************** + * Private Definitions + ****************************************************************************/ + +#ifndef CONFIG_BOOT_RAMFUNCS +# error "CONFIG_BOOT_RAMFUNCS must be defined for this logic" +#endif + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +static void __ramfunc__ +kinesis_setdividers(uint32_t div1, uint32_t div2, uint32_t div3, uint32_t div4); + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: kinesis_setdividers + * + * Description: + * "This routine must be placed in RAM. It is a workaround for errata e2448. + * Flash prefetch must be disabled when the flash clock divider is changed. + * This cannot be performed while executing out of flash. There must be a + * short delay after the clock dividers are changed before prefetch can be + * re-enabled." + * + ****************************************************************************/ + +static void __ramfunc__ +kinesis_setdividers(uint32_t div1, uint32_t div2, uint32_t div3, uint32_t div4) +{ + uint32_t regval; + int i; + + /* Save the current value of the Flash Access Protection Register */ + + regval = getreg32(KINETIS_FMC_PFAPR); + + /* Set M0PFD through M7PFD to 1 to disable prefetch */ + + putreg32(FMC_PFAPR_M7PFD | FMC_PFAPR_M6PFD | FMC_PFAPR_M5PFD | + FMC_PFAPR_M4PFD | FMC_PFAPR_M3PFD | FMC_PFAPR_M2PFD | + FMC_PFAPR_M1PFD | FMC_PFAPR_M0PFD, + KINETIS_FMC_PFAPR); + + /* Set clock dividers to desired value */ + + putreg32(SIM_CLKDIV1_OUTDIV1(div1) | SIM_CLKDIV1_OUTDIV2(div2) | + SIM_CLKDIV1_OUTDIV3(div3) | SIM_CLKDIV1_OUTDIV4(div4), + KINETIS_SIM_CLKDIV1); + + /* Wait for dividers to change */ + + for (i = 0 ; i < div4 ; i++); + + /* Re-store saved value of FMC_PFAPR */ + + putreg32(regval, KINETIS_FMC_PFAPR); +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/************************************************************************************ + * Name: kinetis_clockconfig + * + * Description: + * Called to initialize the Kinetis chip. This does whatever setup is needed to + * put the MCU in a usable state. This includes the initialization of clocking + * using the settings in board.h. + * + ************************************************************************************/ + +void kinetis_clockconfig(void) +{ +#warning "Missing logic" +} + diff --git a/arch/arm/src/kinetis/kinetis_sim.h b/arch/arm/src/kinetis/kinetis_sim.h index 47dcf6320a..67e7df2457 100644 --- a/arch/arm/src/kinetis/kinetis_sim.h +++ b/arch/arm/src/kinetis/kinetis_sim.h @@ -207,14 +207,14 @@ /* Bits 0-23: Reserved */ #define SIM_SOPT6_RSTFLTSEL_SHIFT (24) /* Bits 24-28: Reset pin filter select */ #define SIM_SOPT6_RSTFLTSEL_MASK (31 << SIM_SOPT6_RSTFLTSEL_SHIFT) -# SIM_SOPT6_RSTFLTSEL(n) (((n)-1) << SIM_SOPT6_RSTFLTSEL_SHIFT) /* Bux clock filter count n, n=1..32 */ +# define SIM_SOPT6_RSTFLTSEL(n) (((n)-1) << SIM_SOPT6_RSTFLTSEL_SHIFT) /* Bux clock filter count n, n=1..32 */ #define SIM_SOPT6_RSTFLTEN_SHIFT (29) /* Bits 29-31: Reset pin filter enable */ #define SIM_SOPT6_RSTFLTEN_MASK (7 << SIM_SOPT6_RSTFLTEN_SHIFT) #define SIM_SOPT6_RSTFLTEN_DISABLED (0 << SIM_SOPT6_RSTFLTEN_SHIFT) /* All filtering disabled */ -# define SIM_SOPT6_RSTFLTEN_ BUSCLK1 (1 << SIM_SOPT6_RSTFLTEN_SHIFT) /* Bus clock filter enabled (normal); LPO clock filter enabled (stop) */ -# define SIM_SOPT6_RSTFLTEN_ LPO1 (2 << SIM_SOPT6_RSTFLTEN_SHIFT) /* LPO clock filter enabled */ -# define SIM_SOPT6_RSTFLTEN_ BUSCLK2 (3 << SIM_SOPT6_RSTFLTEN_SHIFT) /* Bus clock filter enabled (normal); All filtering disabled (stop) */ -# define SIM_SOPT6_RSTFLTEN_ LPO2 (4 << SIM_SOPT6_RSTFLTEN_SHIFT) /* PO clock filter enabled (normal); All filtering disabled (stop) */ +# define SIM_SOPT6_RSTFLTEN_BUSCLK1 (1 << SIM_SOPT6_RSTFLTEN_SHIFT) /* Bus clock filter enabled (normal); LPO clock filter enabled (stop) */ +# define SIM_SOPT6_RSTFLTEN_LPO1 (2 << SIM_SOPT6_RSTFLTEN_SHIFT) /* LPO clock filter enabled */ +# define SIM_SOPT6_RSTFLTEN_BUSCLK2 (3 << SIM_SOPT6_RSTFLTEN_SHIFT) /* Bus clock filter enabled (normal); All filtering disabled (stop) */ +# define SIM_SOPT6_RSTFLTEN_LPO2 (4 << SIM_SOPT6_RSTFLTEN_SHIFT) /* PO clock filter enabled (normal); All filtering disabled (stop) */ /* System Options Register 7 */ @@ -385,80 +385,80 @@ /* Bits 0-15: Reserved */ #define SIM_CLKDIV1_OUTDIV4_SHIFT (16) /* Bits 16-19: Clock 4 output divider value */ #define SIM_CLKDIV1_OUTDIV4_MASK (15 << SIM_CLKDIV1_OUTDIV4_SHIFT) -# define SIM_CLKDIV1_OUTDIV4_DIV(n) (((n)-1) << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by n, n=1..16 */ -# define SIM_CLKDIV1_OUTDIV4_DIV1 (0 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 1 */ -# define SIM_CLKDIV1_OUTDIV4_DIV2 (1 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 2 */ -# define SIM_CLKDIV1_OUTDIV4_DIV3 (2 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 3 */ -# define SIM_CLKDIV1_OUTDIV4_DIV4 (3 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 4 */ -# define SIM_CLKDIV1_OUTDIV4_DIV5 (4 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 5 */ -# define SIM_CLKDIV1_OUTDIV4_DIV6 (5 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 6 */ -# define SIM_CLKDIV1_OUTDIV4_DIV7 (6 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 7 */ -# define SIM_CLKDIV1_OUTDIV4_DIV8 (7 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 8 */ -# define SIM_CLKDIV1_OUTDIV4_DIV9 (8 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 9 */ -# define SIM_CLKDIV1_OUTDIV4_DIV10 (9 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 10 */ -# define SIM_CLKDIV1_OUTDIV4_DIV11 (10 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 11 */ -# define SIM_CLKDIV1_OUTDIV4_DIV12 (11 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 12 */ -# define SIM_CLKDIV1_OUTDIV4_DIV13 (12 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 13 */ -# define SIM_CLKDIV1_OUTDIV4_DIV14 (13 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 14 */ -# define SIM_CLKDIV1_OUTDIV4_DIV15 (14 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 15 */ -# define SIM_CLKDIV1_OUTDIV4_DIV16 (15 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 16 */ +# define SIM_CLKDIV1_OUTDIV4(n) (((n)-1) << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by n, n=1..16 */ +# define SIM_CLKDIV1_OUTDIV4_1 (0 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 1 */ +# define SIM_CLKDIV1_OUTDIV4_2 (1 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 2 */ +# define SIM_CLKDIV1_OUTDIV4_3 (2 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 3 */ +# define SIM_CLKDIV1_OUTDIV4_4 (3 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 4 */ +# define SIM_CLKDIV1_OUTDIV4_5 (4 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 5 */ +# define SIM_CLKDIV1_OUTDIV4_6 (5 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 6 */ +# define SIM_CLKDIV1_OUTDIV4_7 (6 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 7 */ +# define SIM_CLKDIV1_OUTDIV4_8 (7 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 8 */ +# define SIM_CLKDIV1_OUTDIV4_9 (8 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 9 */ +# define SIM_CLKDIV1_OUTDIV4_10 (9 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 10 */ +# define SIM_CLKDIV1_OUTDIV4_11 (10 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 11 */ +# define SIM_CLKDIV1_OUTDIV4_12 (11 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 12 */ +# define SIM_CLKDIV1_OUTDIV4_13 (12 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 13 */ +# define SIM_CLKDIV1_OUTDIV4_14 (13 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 14 */ +# define SIM_CLKDIV1_OUTDIV4_15 (14 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 15 */ +# define SIM_CLKDIV1_OUTDIV4_16 (15 << SIM_CLKDIV1_OUTDIV4_SHIFT) /* Divide by 16 */ #define SIM_CLKDIV1_OUTDIV3_SHIFT (20) /* Bits 20-23: Clock 3 output divider value */ #define SIM_CLKDIV1_OUTDIV3_MASK (15 << SIM_CLKDIV1_OUTDIV3_SHIFT) -# define SIM_CLKDIV1_OUTDIV3_DIV(n) (((n)-1) << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by n, n=1..16 */ -# define SIM_CLKDIV1_OUTDIV3_DIV1 (0 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 1 */ -# define SIM_CLKDIV1_OUTDIV3_DIV2 (1 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 2 */ -# define SIM_CLKDIV1_OUTDIV3_DIV3 (2 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 3 */ -# define SIM_CLKDIV1_OUTDIV3_DIV4 (3 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 4 */ -# define SIM_CLKDIV1_OUTDIV3_DIV5 (4 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 5 */ -# define SIM_CLKDIV1_OUTDIV3_DIV6 (5 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 6 */ -# define SIM_CLKDIV1_OUTDIV3_DIV7 (6 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 7 */ -# define SIM_CLKDIV1_OUTDIV3_DIV8 (7 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 8 */ -# define SIM_CLKDIV1_OUTDIV3_DIV9 (8 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 9 */ -# define SIM_CLKDIV1_OUTDIV3_DIV10 (9 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 10 */ -# define SIM_CLKDIV1_OUTDIV3_DIV11 (10 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 11 */ -# define SIM_CLKDIV1_OUTDIV3_DIV12 (11 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 12 */ -# define SIM_CLKDIV1_OUTDIV3_DIV13 (12 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 13 */ -# define SIM_CLKDIV1_OUTDIV3_DIV14 (13 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 14 */ -# define SIM_CLKDIV1_OUTDIV3_DIV15 (14 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 15 */ -# define SIM_CLKDIV1_OUTDIV3_DIV16 (15 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 16 */ +# define SIM_CLKDIV1_OUTDIV3(n) (((n)-1) << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by n, n=1..16 */ +# define SIM_CLKDIV1_OUTDIV3_1 (0 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 1 */ +# define SIM_CLKDIV1_OUTDIV3_2 (1 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 2 */ +# define SIM_CLKDIV1_OUTDIV3_3 (2 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 3 */ +# define SIM_CLKDIV1_OUTDIV3_4 (3 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 4 */ +# define SIM_CLKDIV1_OUTDIV3_5 (4 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 5 */ +# define SIM_CLKDIV1_OUTDIV3_6 (5 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 6 */ +# define SIM_CLKDIV1_OUTDIV3_7 (6 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 7 */ +# define SIM_CLKDIV1_OUTDIV3_8 (7 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 8 */ +# define SIM_CLKDIV1_OUTDIV3_9 (8 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 9 */ +# define SIM_CLKDIV1_OUTDIV3_10 (9 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 10 */ +# define SIM_CLKDIV1_OUTDIV3_11 (10 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 11 */ +# define SIM_CLKDIV1_OUTDIV3_12 (11 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 12 */ +# define SIM_CLKDIV1_OUTDIV3_13 (12 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 13 */ +# define SIM_CLKDIV1_OUTDIV3_14 (13 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 14 */ +# define SIM_CLKDIV1_OUTDIV3_15 (14 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 15 */ +# define SIM_CLKDIV1_OUTDIV3_16 (15 << SIM_CLKDIV1_OUTDIV3_SHIFT) /* Divide by 16 */ #define SIM_CLKDIV1_OUTDIV2_SHIFT (24) /* Bits 24-27: Clock 2 output divider value */ #define SIM_CLKDIV1_OUTDIV2_MASK (15 << SIM_CLKDIV1_OUTDIV2_SHIFT) -# define SIM_CLKDIV1_OUTDIV2_DIV(n) (((n)-1) << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by n, n=1..16 */ -# define SIM_CLKDIV1_OUTDIV2_DIV1 (0 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 1 */ -# define SIM_CLKDIV1_OUTDIV2_DIV2 (1 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 2 */ -# define SIM_CLKDIV1_OUTDIV2_DIV3 (2 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 3 */ -# define SIM_CLKDIV1_OUTDIV2_DIV4 (3 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 4 */ -# define SIM_CLKDIV1_OUTDIV2_DIV5 (4 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 5 */ -# define SIM_CLKDIV1_OUTDIV2_DIV6 (5 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 6 */ -# define SIM_CLKDIV1_OUTDIV2_DIV7 (6 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 7 */ -# define SIM_CLKDIV1_OUTDIV2_DIV8 (7 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 8 */ -# define SIM_CLKDIV1_OUTDIV2_DIV9 (8 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 9 */ -# define SIM_CLKDIV1_OUTDIV2_DIV10 (9 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 10 */ -# define SIM_CLKDIV1_OUTDIV2_DIV11 (10 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 11 */ -# define SIM_CLKDIV1_OUTDIV2_DIV12 (11 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 12 */ -# define SIM_CLKDIV1_OUTDIV2_DIV13 (12 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 13 */ -# define SIM_CLKDIV1_OUTDIV2_DIV14 (13 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 14 */ -# define SIM_CLKDIV1_OUTDIV2_DIV15 (14 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 15 */ -# define SIM_CLKDIV1_OUTDIV2_DIV16 (15 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 16 */ +# define SIM_CLKDIV1_OUTDIV2(n) (((n)-1) << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by n, n=1..16 */ +# define SIM_CLKDIV1_OUTDIV2_1 (0 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 1 */ +# define SIM_CLKDIV1_OUTDIV2_2 (1 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 2 */ +# define SIM_CLKDIV1_OUTDIV2_3 (2 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 3 */ +# define SIM_CLKDIV1_OUTDIV2_4 (3 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 4 */ +# define SIM_CLKDIV1_OUTDIV2_5 (4 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 5 */ +# define SIM_CLKDIV1_OUTDIV2_6 (5 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 6 */ +# define SIM_CLKDIV1_OUTDIV2_7 (6 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 7 */ +# define SIM_CLKDIV1_OUTDIV2_8 (7 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 8 */ +# define SIM_CLKDIV1_OUTDIV2_9 (8 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 9 */ +# define SIM_CLKDIV1_OUTDIV2_10 (9 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 10 */ +# define SIM_CLKDIV1_OUTDIV2_11 (10 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 11 */ +# define SIM_CLKDIV1_OUTDIV2_12 (11 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 12 */ +# define SIM_CLKDIV1_OUTDIV2_13 (12 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 13 */ +# define SIM_CLKDIV1_OUTDIV2_14 (13 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 14 */ +# define SIM_CLKDIV1_OUTDIV2_15 (14 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 15 */ +# define SIM_CLKDIV1_OUTDIV2_16 (15 << SIM_CLKDIV1_OUTDIV2_SHIFT) /* Divide by 16 */ #define SIM_CLKDIV1_OUTDIV1_SHIFT (28) /* Bits 28-31: Clock 1 output divider value */ #define SIM_CLKDIV1_OUTDIV1_MASK (15 << SIM_CLKDIV1_OUTDIV1_SHIFT) -# define SIM_CLKDIV1_OUTDIV1_DIV(n) (((n)-1) << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by n, n=1..16 */ -# define SIM_CLKDIV1_OUTDIV1_DIV1 (0 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 1 */ -# define SIM_CLKDIV1_OUTDIV1_DIV2 (1 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 2 */ -# define SIM_CLKDIV1_OUTDIV1_DIV3 (2 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 3 */ -# define SIM_CLKDIV1_OUTDIV1_DIV4 (3 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 4 */ -# define SIM_CLKDIV1_OUTDIV1_DIV5 (4 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 5 */ -# define SIM_CLKDIV1_OUTDIV1_DIV6 (5 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 6 */ -# define SIM_CLKDIV1_OUTDIV1_DIV7 (6 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 7 */ -# define SIM_CLKDIV1_OUTDIV1_DIV8 (7 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 8 */ -# define SIM_CLKDIV1_OUTDIV1_DIV9 (8 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 9 */ -# define SIM_CLKDIV1_OUTDIV1_DIV10 (9 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 10 */ -# define SIM_CLKDIV1_OUTDIV1_DIV11 (10 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 11 */ -# define SIM_CLKDIV1_OUTDIV1_DIV12 (11 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 12 */ -# define SIM_CLKDIV1_OUTDIV1_DIV13 (12 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 13 */ -# define SIM_CLKDIV1_OUTDIV1_DIV14 (13 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 14 */ -# define SIM_CLKDIV1_OUTDIV1_DIV15 (14 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 15 */ -# define SIM_CLKDIV1_OUTDIV1_DIV16 (15 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 16 */ +# define SIM_CLKDIV1_OUTDIV1(n) (((n)-1) << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by n, n=1..16 */ +# define SIM_CLKDIV1_OUTDIV1_1 (0 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 1 */ +# define SIM_CLKDIV1_OUTDIV1_2 (1 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 2 */ +# define SIM_CLKDIV1_OUTDIV1_3 (2 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 3 */ +# define SIM_CLKDIV1_OUTDIV1_4 (3 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 4 */ +# define SIM_CLKDIV1_OUTDIV1_5 (4 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 5 */ +# define SIM_CLKDIV1_OUTDIV1_6 (5 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 6 */ +# define SIM_CLKDIV1_OUTDIV1_7 (6 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 7 */ +# define SIM_CLKDIV1_OUTDIV1_8 (7 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 8 */ +# define SIM_CLKDIV1_OUTDIV1_9 (8 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 9 */ +# define SIM_CLKDIV1_OUTDIV1_10 (9 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 10 */ +# define SIM_CLKDIV1_OUTDIV1_11 (10 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 11 */ +# define SIM_CLKDIV1_OUTDIV1_12 (11 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 12 */ +# define SIM_CLKDIV1_OUTDIV1_13 (12 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 13 */ +# define SIM_CLKDIV1_OUTDIV1_14 (13 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 14 */ +# define SIM_CLKDIV1_OUTDIV1_15 (14 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 15 */ +# define SIM_CLKDIV1_OUTDIV1_16 (15 << SIM_CLKDIV1_OUTDIV1_SHIFT) /* Divide by 16 */ /* System Clock Divider Register 2 */ diff --git a/arch/arm/src/kinetis/kinetis_start.c b/arch/arm/src/kinetis/kinetis_start.c index eab6787602..403424da2d 100755 --- a/arch/arm/src/kinetis/kinetis_start.c +++ b/arch/arm/src/kinetis/kinetis_start.c @@ -99,6 +99,10 @@ void __start(void) const uint32_t *src; uint32_t *dest; + /* Disable the watchdog timer */ + + kinetis_wddisable(); + /* Configure the uart so that we can get debug output as soon as possible */ kinetis_clockconfig(); @@ -127,22 +131,41 @@ void __start(void) } showprogress('C'); + /* Copy any necessary code sections from FLASH to RAM. The correct + * destination in SRAM is geive by _sramfuncs and _eramfuncs. The + * temporary location is in flash after the data initalization code + * at _framfuncs + */ + +#ifndef CONFIG_BOOT_RAMFUNCS + for (src = &_framfuncs, dest = &_sramfuncs; dest < &_eramfuncs; ) + { + *dest++ = *src++; + } +#endif + showprogress('E'); + + /* Perform early serial initialization */ #ifdef CONFIG_USE_EARLYSERIALINIT up_earlyserialinit(); #endif - showprogress('D'); + showprogress('F'); /* Initialize onboard resources */ kinetis_boardinitialize(); - showprogress('E'); + showprogress('G'); + showprogress('\r'); + showprogress('\n'); + + /* Show reset status */ + + dbg("Reset status: %02x:%02x\n", getreg8(KINETIS_SMC_SRSH), getreg8(KINETIS_SMC_SRSL)); /* Then start NuttX */ - showprogress('\r'); - showprogress('\n'); os_start(); /* Shouldn't get here */ diff --git a/arch/arm/src/kinetis/kinetis_wdog.c b/arch/arm/src/kinetis/kinetis_wdog.c new file mode 100644 index 0000000000..9ba49306fa --- /dev/null +++ b/arch/arm/src/kinetis/kinetis_wdog.c @@ -0,0 +1,117 @@ +/**************************************************************************** + * arch/arm/src/kinetis/kinetis_wdog.c + * arch/arm/src/chip/kinetis_wdog.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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 + +#include + +#include "up_arch.h" +#include "kinetis_internal.h" +#include "kinetis_wdog.h" + +/**************************************************************************** + * Private Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: kinetis_wdunlock + * + * Description: + * Watchdog timer unlock routine. Writing 0xc520 followed by 0xd928 will + * unlock the write once registers in the WDOG so they are writable + * within the WCT period. + * + ****************************************************************************/ + +static void kinetis_wdunlock(void) +{ + irqstate_t flags; + + /* This sequence must execute within 20 clock cycles. Disable interrupts + * to assure that the following steps are atomic. + */ + + flags = irqsave(); + + /* Write 0xC520 followed by 0xD928 to the unlock register */ + + putreg16(0xc520, KINETIS_WDOG_UNLOCK); + putreg16(0xd928, KINETIS_WDOG_UNLOCK); + irqrestore(flags); +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: kinetis_wddisable + * + * Description: + * Disable the watchdog timer + * + ****************************************************************************/ + +void kinetis_wddisable(void) +{ + uint16_t regval; + + /* Unlock the watchdog so that we can write to registers */ + + kinetis_wdunlock(); + + /* Clear the WDOGEN bit to disable the watchdog */ + + regval = getreg16(KINETIS_WDOG_STCTRLH); + regval &= ~WDOG_STCTRLH_WDOGEN; + putreg16(regval, KINETIS_WDOG_STCTRLH); +}