see: http://mbed.org/users/okini3939/notebook/low-power-lpc81x/
Revision 1:f336c9774f7a, committed 2013-06-07
- Comitter:
- okini3939
- Date:
- Fri Jun 07 22:47:35 2013 +0000
- Parent:
- 0:349dc3aae37a
- Commit message:
- fix
Changed in this revision
diff -r 349dc3aae37a -r f336c9774f7a main.cpp --- a/main.cpp Thu Jun 06 09:52:40 2013 +0000 +++ b/main.cpp Fri Jun 07 22:47:35 2013 +0000 @@ -1,8 +1,8 @@ -/* system_LPC8xx.c - * #define CLOCK_SETUP 0 +/* + * Can not be compiled with mbed.org. + * I used MDK-ARM Lite + LPC-LINK2. */ -//#include "mbed.h" #include "LPC8xx.h" void SwitchMatrix_Init (void);
diff -r 349dc3aae37a -r f336c9774f7a mbed.bld --- a/mbed.bld Thu Jun 06 09:52:40 2013 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://mbed.org/users/mbed_official/code/mbed/builds/b3110cd2dd17 \ No newline at end of file
diff -r 349dc3aae37a -r f336c9774f7a swm.c --- a/swm.c Thu Jun 06 09:52:40 2013 +0000 +++ b/swm.c Fri Jun 07 22:47:35 2013 +0000 @@ -45,8 +45,7 @@ /* SWCLK */ /* SWDIO */ /* RESET */ - /* CLKIN */ - LPC_SWM->PINENABLE0 = 0xffffff33UL; + LPC_SWM->PINENABLE0 = 0xffffffb3UL; } /**********************************************************************
diff -r 349dc3aae37a -r f336c9774f7a system_LPC8xx.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/system_LPC8xx.c Fri Jun 07 22:47:35 2013 +0000 @@ -0,0 +1,374 @@ +// Updated - Code Red Technologies - 18 March 2013 +// +// Defines in system_LPC8xx.c changed so that clock setup is +// done based on IRC rather than XTAL, so as to function with +// LPC800-MAX board as well as LPCXpresso812. SystemCoreClock +// thus now defaults to 12MHz +// +/****************************************************************************** + * @file: system_LPC8xx.c + * @purpose: CMSIS Cortex-M0+ Device Peripheral Access Layer Source File + * for the NXP LPC8xx Device Series + * @version: V1.0 + * @date: 16. Aug. 2012 + *---------------------------------------------------------------------------- + * + * Copyright (C) 2012 ARM Limited. All rights reserved. + * + * ARM Limited (ARM) is supplying this software for use with Cortex-M0+ + * processor based microcontrollers. This file can be freely distributed + * within development tools that are supporting such ARM based processors. + * + * THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED + * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. + * ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR + * CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER. + * + ******************************************************************************/ +#include <stdint.h> +#include "LPC8xx.h" + +/* +//-------- <<< Use Configuration Wizard in Context Menu >>> ------------------ +*/ + +/*--------------------- Clock Configuration ---------------------------------- +// +// <e> Clock Configuration +// <h> System Oscillator Control Register (SYSOSCCTRL) +// <o1.0> BYPASS: System Oscillator Bypass Enable +// <i> If enabled then PLL input (sys_osc_clk) is fed +// <i> directly from XTALIN and XTALOUT pins. +// <o1.9> FREQRANGE: System Oscillator Frequency Range +// <i> Determines frequency range for Low-power oscillator. +// <0=> 1 - 20 MHz +// <1=> 15 - 25 MHz +// </h> +// +// <h> Watchdog Oscillator Control Register (WDTOSCCTRL) +// <o2.0..4> DIVSEL: Select Divider for Fclkana +// <i> wdt_osc_clk = Fclkana/ (2 ・ス (1 + DIVSEL)) +// <0-31> +// <o2.5..8> FREQSEL: Select Watchdog Oscillator Analog Output Frequency (Fclkana) +// <0=> Undefined +// <1=> 0.5 MHz +// <2=> 0.8 MHz +// <3=> 1.1 MHz +// <4=> 1.4 MHz +// <5=> 1.6 MHz +// <6=> 1.8 MHz +// <7=> 2.0 MHz +// <8=> 2.2 MHz +// <9=> 2.4 MHz +// <10=> 2.6 MHz +// <11=> 2.7 MHz +// <12=> 2.9 MHz +// <13=> 3.1 MHz +// <14=> 3.2 MHz +// <15=> 3.4 MHz +// </h> +// +// <h> System PLL Control Register (SYSPLLCTRL) +// <i> F_clkout = M * F_clkin = F_CCO / (2 * P) +// <i> F_clkin must be in the range of 10 MHz to 25 MHz +// <i> F_CCO must be in the range of 156 MHz to 320 MHz +// <o3.0..4> MSEL: Feedback Divider Selection +// <i> M = MSEL + 1 +// <0-31> +// <o3.5..6> PSEL: Post Divider Selection +// <0=> P = 1 +// <1=> P = 2 +// <2=> P = 4 +// <3=> P = 8 +// </h> +// +// <h> System PLL Clock Source Select Register (SYSPLLCLKSEL) +// <o4.0..1> SEL: System PLL Clock Source +// <0=> IRC Oscillator +// <1=> System Oscillator +// <2=> Reserved +// <3=> CLKIN pin +// </h> +// +// <h> Main Clock Source Select Register (MAINCLKSEL) +// <o5.0..1> SEL: Clock Source for Main Clock +// <0=> IRC Oscillator +// <1=> Input Clock to System PLL +// <2=> WDT Oscillator +// <3=> System PLL Clock Out +// </h> +// +// <h> System AHB Clock Divider Register (SYSAHBCLKDIV) +// <o6.0..7> DIV: System AHB Clock Divider +// <i> Divides main clock to provide system clock to core, memories, and peripherals. +// <i> 0 = is disabled +// <0-255> +// </h> +// </e> +*/ +#define CLOCK_SETUP 0 +#define SYSOSCCTRL_Val 0x00000000 // Reset: 0x000 +#define WDTOSCCTRL_Val 0x00000000 // Reset: 0x000 +#define SYSPLLCTRL_Val 0x00000041 // Reset: 0x000 +#define SYSPLLCLKSEL_Val 0x00000000 // Reset: 0x000 +#define MAINCLKSEL_Val 0x00000000 // Reset: 0x000 +#define SYSAHBCLKDIV_Val 0x00000001 // Reset: 0x001 + +/* +//-------- <<< end of configuration section >>> ------------------------------ +*/ + +/*---------------------------------------------------------------------------- + Check the register settings + *----------------------------------------------------------------------------*/ +#define CHECK_RANGE(val, min, max) ((val < min) || (val > max)) +#define CHECK_RSVD(val, mask) (val & mask) + +/* Clock Configuration -------------------------------------------------------*/ +#if (CHECK_RSVD((SYSOSCCTRL_Val), ~0x00000003)) + #error "SYSOSCCTRL: Invalid values of reserved bits!" +#endif + +#if (CHECK_RSVD((WDTOSCCTRL_Val), ~0x000001FF)) + #error "WDTOSCCTRL: Invalid values of reserved bits!" +#endif + +#if (CHECK_RANGE((SYSPLLCLKSEL_Val), 0, 3)) + #error "SYSPLLCLKSEL: Value out of range!" +#endif + +#if (CHECK_RSVD((SYSPLLCTRL_Val), ~0x000001FF)) + #error "SYSPLLCTRL: Invalid values of reserved bits!" +#endif + +#if (CHECK_RSVD((MAINCLKSEL_Val), ~0x00000003)) + #error "MAINCLKSEL: Invalid values of reserved bits!" +#endif + +#if (CHECK_RANGE((SYSAHBCLKDIV_Val), 0, 255)) + #error "SYSAHBCLKDIV: Value out of range!" +#endif + + +/*---------------------------------------------------------------------------- + DEFINES + *----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- + Define clocks + *----------------------------------------------------------------------------*/ +#define __XTAL (12000000UL) /* Oscillator frequency */ +#define __SYS_OSC_CLK ( __XTAL) /* Main oscillator frequency */ +#define __IRC_OSC_CLK (12000000UL) /* Internal RC oscillator frequency */ +#define __CLKIN_CLK (12000000UL) /* CLKIN pin frequency */ + + +#define __FREQSEL ((WDTOSCCTRL_Val >> 5) & 0x0F) +#define __DIVSEL (((WDTOSCCTRL_Val & 0x1F) << 1) + 2) + +#if (CLOCK_SETUP) /* Clock Setup */ + #if (__FREQSEL == 0) + #define __WDT_OSC_CLK ( 0) /* undefined */ + #elif (__FREQSEL == 1) + #define __WDT_OSC_CLK ( 500000 / __DIVSEL) + #elif (__FREQSEL == 2) + #define __WDT_OSC_CLK ( 800000 / __DIVSEL) + #elif (__FREQSEL == 3) + #define __WDT_OSC_CLK (1100000 / __DIVSEL) + #elif (__FREQSEL == 4) + #define __WDT_OSC_CLK (1400000 / __DIVSEL) + #elif (__FREQSEL == 5) + #define __WDT_OSC_CLK (1600000 / __DIVSEL) + #elif (__FREQSEL == 6) + #define __WDT_OSC_CLK (1800000 / __DIVSEL) + #elif (__FREQSEL == 7) + #define __WDT_OSC_CLK (2000000 / __DIVSEL) + #elif (__FREQSEL == 8) + #define __WDT_OSC_CLK (2200000 / __DIVSEL) + #elif (__FREQSEL == 9) + #define __WDT_OSC_CLK (2400000 / __DIVSEL) + #elif (__FREQSEL == 10) + #define __WDT_OSC_CLK (2600000 / __DIVSEL) + #elif (__FREQSEL == 11) + #define __WDT_OSC_CLK (2700000 / __DIVSEL) + #elif (__FREQSEL == 12) + #define __WDT_OSC_CLK (2900000 / __DIVSEL) + #elif (__FREQSEL == 13) + #define __WDT_OSC_CLK (3100000 / __DIVSEL) + #elif (__FREQSEL == 14) + #define __WDT_OSC_CLK (3200000 / __DIVSEL) + #else + #define __WDT_OSC_CLK (3400000 / __DIVSEL) + #endif + + /* sys_pllclkin calculation */ + #if ((SYSPLLCLKSEL_Val & 0x03) == 0) + #define __SYS_PLLCLKIN (__IRC_OSC_CLK) + #elif ((SYSPLLCLKSEL_Val & 0x03) == 1) + #define __SYS_PLLCLKIN (__SYS_OSC_CLK) + #elif ((SYSPLLCLKSEL_Val & 0x03) == 3) + #define __SYS_PLLCLKIN (__CLKIN_CLK) + #else + #define __SYS_PLLCLKIN (0) + #endif + + #define __SYS_PLLCLKOUT (__SYS_PLLCLKIN * ((SYSPLLCTRL_Val & 0x01F) + 1)) + + /* main clock calculation */ + #if ((MAINCLKSEL_Val & 0x03) == 0) + #define __MAIN_CLOCK (__IRC_OSC_CLK) + #elif ((MAINCLKSEL_Val & 0x03) == 1) + #define __MAIN_CLOCK (__SYS_PLLCLKIN) + #elif ((MAINCLKSEL_Val & 0x03) == 2) + #if (__FREQSEL == 0) + #error "MAINCLKSEL: WDT Oscillator selected but FREQSEL is undefined!" + #else + #define __MAIN_CLOCK (__WDT_OSC_CLK) + #endif + #elif ((MAINCLKSEL_Val & 0x03) == 3) + #define __MAIN_CLOCK (__SYS_PLLCLKOUT) + #else + #define __MAIN_CLOCK (0) + #endif + + #define __SYSTEM_CLOCK (__MAIN_CLOCK / SYSAHBCLKDIV_Val) + +#else + #define __SYSTEM_CLOCK (__IRC_OSC_CLK) +#endif // CLOCK_SETUP + + +/*---------------------------------------------------------------------------- + Clock Variable definitions + *----------------------------------------------------------------------------*/ +uint32_t SystemCoreClock = __SYSTEM_CLOCK;/*!< System Clock Frequency (Core Clock)*/ + + +/*---------------------------------------------------------------------------- + Clock functions + *----------------------------------------------------------------------------*/ +void SystemCoreClockUpdate (void) /* Get Core Clock Frequency */ +{ + uint32_t wdt_osc = 0; + + /* Determine clock frequency according to clock register values */ + switch ((LPC_SYSCON->WDTOSCCTRL >> 5) & 0x0F) { + case 0: wdt_osc = 0; break; + case 1: wdt_osc = 500000; break; + case 2: wdt_osc = 800000; break; + case 3: wdt_osc = 1100000; break; + case 4: wdt_osc = 1400000; break; + case 5: wdt_osc = 1600000; break; + case 6: wdt_osc = 1800000; break; + case 7: wdt_osc = 2000000; break; + case 8: wdt_osc = 2200000; break; + case 9: wdt_osc = 2400000; break; + case 10: wdt_osc = 2600000; break; + case 11: wdt_osc = 2700000; break; + case 12: wdt_osc = 2900000; break; + case 13: wdt_osc = 3100000; break; + case 14: wdt_osc = 3200000; break; + case 15: wdt_osc = 3400000; break; + } + wdt_osc /= ((LPC_SYSCON->WDTOSCCTRL & 0x1F) << 1) + 2; + + switch (LPC_SYSCON->MAINCLKSEL & 0x03) { + case 0: /* Internal RC oscillator */ + SystemCoreClock = __IRC_OSC_CLK; + break; + case 1: /* Input Clock to System PLL */ + switch (LPC_SYSCON->SYSPLLCLKSEL & 0x03) { + case 0: /* Internal RC oscillator */ + SystemCoreClock = __IRC_OSC_CLK; + break; + case 1: /* System oscillator */ + SystemCoreClock = __SYS_OSC_CLK; + break; + case 2: /* Reserved */ + SystemCoreClock = 0; + break; + case 3: /* CLKIN pin */ + SystemCoreClock = __CLKIN_CLK; + break; + } + break; + case 2: /* WDT Oscillator */ + SystemCoreClock = wdt_osc; + break; + case 3: /* System PLL Clock Out */ + switch (LPC_SYSCON->SYSPLLCLKSEL & 0x03) { + case 0: /* Internal RC oscillator */ + SystemCoreClock = __IRC_OSC_CLK * ((LPC_SYSCON->SYSPLLCTRL & 0x01F) + 1); + break; + case 1: /* System oscillator */ + SystemCoreClock = __SYS_OSC_CLK * ((LPC_SYSCON->SYSPLLCTRL & 0x01F) + 1); + break; + case 2: /* Reserved */ + SystemCoreClock = 0; + break; + case 3: /* CLKIN pin */ + SystemCoreClock = __CLKIN_CLK * ((LPC_SYSCON->SYSPLLCTRL & 0x01F) + 1); + break; + } + break; + } + + SystemCoreClock /= LPC_SYSCON->SYSAHBCLKDIV; + +} + +/** + * Initialize the system + * + * @param none + * @return none + * + * @brief Setup the microcontroller system. + * Initialize the System. + */ +void SystemInit (void) { + volatile uint32_t i; + + /* System clock to the IOCON & the SWM need to be enabled or + most of the I/O related peripherals won't work. */ + LPC_SYSCON->SYSAHBCLKCTRL |= ( (0x1 << 7) | (0x1 << 18) ); + +#if (CLOCK_SETUP) /* Clock Setup */ + +#if ((SYSPLLCLKSEL_Val & 0x03) == 1) + LPC_IOCON->PIO0_8 &= ~(0x3 << 3); + LPC_IOCON->PIO0_9 &= ~(0x3 << 3); + LPC_SWM->PINENABLE0 &= ~(0x3 << 4); + LPC_SYSCON->PDRUNCFG &= ~(0x1 << 5); /* Power-up System Osc */ + LPC_SYSCON->SYSOSCCTRL = SYSOSCCTRL_Val; + for (i = 0; i < 200; i++) __NOP(); +#endif +#if ((SYSPLLCLKSEL_Val & 0x03) == 3) + LPC_IOCON->PIO0_1 &= ~(0x3 << 3); + LPC_SWM->PINENABLE0 &= ~(0x1 << 7); + for (i = 0; i < 200; i++) __NOP(); +#endif + + LPC_SYSCON->SYSPLLCLKSEL = SYSPLLCLKSEL_Val; /* Select PLL Input */ + LPC_SYSCON->SYSPLLCLKUEN = 0x01; /* Update Clock Source */ + while (!(LPC_SYSCON->SYSPLLCLKUEN & 0x01)); /* Wait Until Updated */ +#if ((MAINCLKSEL_Val & 0x03) == 3) /* Main Clock is PLL Out */ + LPC_SYSCON->SYSPLLCTRL = SYSPLLCTRL_Val; + LPC_SYSCON->PDRUNCFG &= ~(0x1 << 7); /* Power-up SYSPLL */ + while (!(LPC_SYSCON->SYSPLLSTAT & 0x01)); /* Wait Until PLL Locked */ +#endif + +#if (((MAINCLKSEL_Val & 0x03) == 2) ) + LPC_SYSCON->WDTOSCCTRL = WDTOSCCTRL_Val; + LPC_SYSCON->PDRUNCFG &= ~(0x1 << 6); /* Power-up WDT Clock */ + for (i = 0; i < 200; i++) __NOP(); +#endif + + LPC_SYSCON->MAINCLKSEL = MAINCLKSEL_Val; /* Select PLL Clock Output */ + LPC_SYSCON->MAINCLKUEN = 0x01; /* Update MCLK Clock Source */ + while (!(LPC_SYSCON->MAINCLKUEN & 0x01)); /* Wait Until Updated */ + + LPC_SYSCON->SYSAHBCLKDIV = SYSAHBCLKDIV_Val; +#endif +}
diff -r 349dc3aae37a -r f336c9774f7a type.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/type.h Fri Jun 07 22:47:35 2013 +0000 @@ -0,0 +1,60 @@ +/* +* @brief +* This file contains different type definition. +* +* @note +* Copyright(C) NXP Semiconductors, 2012 +* All rights reserved. +* +* @par +* Software that is described herein is for illustrative purposes only +* which provides customers with programming information regarding the +* LPC products. This software is supplied "AS IS" without any warranties of +* any kind, and NXP Semiconductors and its licensor disclaim any and +* all warranties, express or implied, including all implied warranties of +* merchantability, fitness for a particular purpose and non-infringement of +* intellectual property rights. NXP Semiconductors assumes no responsibility +* or liability for the use of the software, conveys no license or rights under any +* patent, copyright, mask work right, or any other intellectual property rights in +* or to any products. NXP Semiconductors reserves the right to make changes +* in the software without notification. NXP Semiconductors also makes no +* representation or warranty that such application will be suitable for the +* specified use without further testing or modification. +* +* @par +* Permission to use, copy, modify, and distribute this software and its +* documentation is hereby granted, under NXP Semiconductors' and its +* licensor's relevant copyrights in the software, without fee, provided that it +* is used in conjunction with NXP Semiconductors microcontrollers. This +* copyright, permission, and disclaimer notice must appear in all copies of +* this code. +*/ + +#ifndef __TYPE_H__ +#define __TYPE_H__ + +/* exact-width signed integer types */ +typedef signed char int8_t; +typedef signed short int int16_t; +typedef signed int int32_t; +typedef signed __int64 int64_t; + + /* exact-width unsigned integer types */ +typedef unsigned char uint8_t; +typedef unsigned short int uint16_t; +typedef unsigned int uint32_t; +typedef unsigned __int64 uint64_t; + +#ifndef NULL +#define NULL ((void *)0) +#endif + +#ifndef FALSE +#define FALSE (0) +#endif + +#ifndef TRUE +#define TRUE (1) +#endif + +#endif /* __TYPE_H__ */