diff options
Diffstat (limited to 'tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC11UXX/system_LPC11Uxx.c')
| -rw-r--r-- | tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC11UXX/system_LPC11Uxx.c | 450 |
1 files changed, 450 insertions, 0 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC11UXX/system_LPC11Uxx.c b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC11UXX/system_LPC11Uxx.c new file mode 100644 index 0000000000..7c4d7e73cf --- /dev/null +++ b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC11UXX/system_LPC11Uxx.c @@ -0,0 +1,450 @@ +/****************************************************************************** + * @file system_LPC11Uxx.c + * @purpose CMSIS Cortex-M3 Device Peripheral Access Layer Source File + * for the NXP LPC13xx Device Series + * @version V1.10 + * @date 24. November 2010 + * + * @note + * Copyright (C) 2009-2010 ARM Limited. All rights reserved. + * + * @par + * ARM Limited (ARM) is supplying this software for use with Cortex-M + * processor based microcontrollers. This file can be freely distributed + * within development tools that are supporting such ARM based processors. + * + * @par + * 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 "LPC11Uxx.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 * (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=> Reserved +// </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> +// +// <h> USB PLL Control Register (USBPLLCTRL) +// <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 +// <o7.0..4> MSEL: Feedback Divider Selection +// <i> M = MSEL + 1 +// <0-31> +// <o7.5..6> PSEL: Post Divider Selection +// <0=> P = 1 +// <1=> P = 2 +// <2=> P = 4 +// <3=> P = 8 +// </h> +// +// <h> USB PLL Clock Source Select Register (USBPLLCLKSEL) +// <o8.0..1> SEL: USB PLL Clock Source +// <i> USB PLL clock source must be switched to System Oscillator for correct USB operation +// <0=> IRC Oscillator +// <1=> System Oscillator +// <2=> Reserved +// <3=> Reserved +// </h> +// +// <h> USB Clock Source Select Register (USBCLKSEL) +// <o9.0..1> SEL: System PLL Clock Source +// <0=> USB PLL out +// <1=> Main clock +// <2=> Reserved +// <3=> Reserved +// </h> +// +// <h> USB Clock Divider Register (USBCLKDIV) +// <o10.0..7> DIV: USB Clock Divider +// <i> Divides USB clock to 48 MHz. +// <i> 0 = is disabled +// <0-255> +// </h> +// </e> +*/ +#define CLOCK_SETUP 1 +#define SYSOSCCTRL_Val 0x00000000 // Reset: 0x000 +#define WDTOSCCTRL_Val 0x00000000 // Reset: 0x000 +#define SYSPLLCTRL_Val 0x00000023 // Reset: 0x000 +#define SYSPLLCLKSEL_Val 0x00000001 // Reset: 0x000 +#define MAINCLKSEL_Val 0x00000003 // Reset: 0x000 +#define SYSAHBCLKDIV_Val 0x00000001 // Reset: 0x001 +#define USBPLLCTRL_Val 0x00000023 // Reset: 0x000 +#define USBPLLCLKSEL_Val 0x00000001 // Reset: 0x000 +#define USBCLKSEL_Val 0x00000000 // Reset: 0x000 +#define USBCLKDIV_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, 2)) + #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 + +#if (CHECK_RANGE((USBPLLCLKSEL_Val), 0, 1)) + #error "USBPLLCLKSEL: Value out of range!" +#endif + +#if (CHECK_RSVD((USBPLLCTRL_Val), ~0x000001FF)) + #error "USBPLLCTRL: Invalid values of reserved bits!" +#endif + +#if (CHECK_RANGE((USBCLKSEL_Val), 0, 1)) + #error "USBCLKSEL: Value out of range!" +#endif + +#if (CHECK_RANGE((USBCLKDIV_Val), 0, 255)) + #error "USBCLKDIV: 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 __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) + #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 */ + case 3: /* Reserved */ + SystemCoreClock = 0; + 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 */ + if (LPC_SYSCON->SYSPLLCTRL & 0x180) { + SystemCoreClock = __IRC_OSC_CLK; + } else { + SystemCoreClock = __IRC_OSC_CLK * ((LPC_SYSCON->SYSPLLCTRL & 0x01F) + 1); + } + break; + case 1: /* System oscillator */ + if (LPC_SYSCON->SYSPLLCTRL & 0x180) { + SystemCoreClock = __SYS_OSC_CLK; + } else { + SystemCoreClock = __SYS_OSC_CLK * ((LPC_SYSCON->SYSPLLCTRL & 0x01F) + 1); + } + break; + case 2: /* Reserved */ + case 3: /* Reserved */ + SystemCoreClock = 0; + 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; + +#if (CLOCK_SETUP) /* Clock Setup */ + +#if ((SYSPLLCLKSEL_Val & 0x03) == 1) + LPC_SYSCON->PDRUNCFG &= ~(1 << 5); /* Power-up System Osc */ + LPC_SYSCON->SYSOSCCTRL = SYSOSCCTRL_Val; + for (i = 0; i < 200; i++) __NOP(); +#endif + + LPC_SYSCON->SYSPLLCLKSEL = SYSPLLCLKSEL_Val; /* Select PLL Input */ + LPC_SYSCON->SYSPLLCLKUEN = 0x01; /* Update Clock Source */ + LPC_SYSCON->SYSPLLCLKUEN = 0x00; /* Toggle Update Register */ + LPC_SYSCON->SYSPLLCLKUEN = 0x01; + 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 &= ~(1 << 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 &= ~(1 << 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 */ + LPC_SYSCON->MAINCLKUEN = 0x00; /* Toggle Update Register */ + LPC_SYSCON->MAINCLKUEN = 0x01; + while (!(LPC_SYSCON->MAINCLKUEN & 0x01)); /* Wait Until Updated */ + + LPC_SYSCON->SYSAHBCLKDIV = SYSAHBCLKDIV_Val; + +#if ((USBCLKDIV_Val & 0x1FF) != 0) /* USB clock is used */ + LPC_SYSCON->PDRUNCFG &= ~(1 << 10); /* Power-up USB PHY */ + +#if ((USBCLKSEL_Val & 0x003) == 0) /* USB clock is USB PLL out */ + LPC_SYSCON->PDRUNCFG &= ~(1 << 8); /* Power-up USB PLL */ + LPC_SYSCON->USBPLLCLKSEL = USBPLLCLKSEL_Val; /* Select PLL Input */ + LPC_SYSCON->USBPLLCLKUEN = 0x01; /* Update Clock Source */ + LPC_SYSCON->USBPLLCLKUEN = 0x00; /* Toggle Update Register */ + LPC_SYSCON->USBPLLCLKUEN = 0x01; + while (!(LPC_SYSCON->USBPLLCLKUEN & 0x01)); /* Wait Until Updated */ + LPC_SYSCON->USBPLLCTRL = USBPLLCTRL_Val; + while (!(LPC_SYSCON->USBPLLSTAT & 0x01)); /* Wait Until PLL Locked */ + LPC_SYSCON->USBCLKSEL = 0x00; /* Select USB PLL */ +#endif + + LPC_SYSCON->USBCLKSEL = USBCLKSEL_Val; /* Select USB Clock */ + LPC_SYSCON->USBCLKDIV = USBCLKDIV_Val; /* Set USB clock divider */ + +#else /* USB clock is not used */ + LPC_SYSCON->PDRUNCFG |= (1 << 10); /* Power-down USB PHY */ + LPC_SYSCON->PDRUNCFG |= (1 << 8); /* Power-down USB PLL */ +#endif + +#endif + + /* System clock to the IOCON needs to be enabled or + most of the I/O related peripherals won't work. */ + LPC_SYSCON->SYSAHBCLKCTRL |= (1<<16); +} |