mbed official
mbed library sources. Supersedes mbed-src.
Dependents: Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more
Diff: targets/TARGET_NXP/TARGET_LPC11UXX/device/system_LPC11Uxx.c
- Revision:
- 149:156823d33999
- Parent:
- 144:ef7eb2e8f9f7
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_NXP/TARGET_LPC11UXX/device/system_LPC11Uxx.c Fri Oct 28 11:17:30 2016 +0100
@@ -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);
+}
