Diff: vendor/NXP/LPC2368/cmsis/system_LPC23xx.c

Revision:

13:0645d8841f51

Parent:

12:5fa2273de5db

Child:

14:096882eb0961

--- a/vendor/NXP/LPC2368/cmsis/system_LPC23xx.c	Wed Jul 24 11:11:21 2013 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,144 +0,0 @@
-/* mbed Microcontroller Library
- * Copyright (C) 2008-2009 ARM Limited. All rights reserved.
- *
- * ARM7 version of CMSIS-like functionality - not advised for use outside mbed!
- */
-
-#include <stdint.h>
-#include "LPC23xx.h"
-
-#define CLOCK_SETUP           1
-#define SCS_Val               0x00000020
-#define CLKSRCSEL_Val         0x00000001
-
-#define PLL0_SETUP            1
-#define PLL0CFG_Val           0x00000013
-#define CCLKCFG_Val           0x00000007
-#define USBCLKCFG_Val         0x00000009
-#define PCLKSEL0_Val          0x00000000
-#define PCLKSEL1_Val          0x00000000
-#define PCONP_Val             0x042887DE
-#define CLKOUTCFG_Val         0x00000000
-#define MAMCR_Val             0x00000001  // there is a bug in the MAM so it should never be fully enabled (only disabled or partially enabled)
-#define MAMTIM_Val            0x00000004
-
-/*----------------------------------------------------------------------------
-  DEFINES
- *----------------------------------------------------------------------------*/
-    
-#define XTAL        (12000000UL)        /* Oscillator frequency               */
-#define OSC_CLK     (      XTAL)        /* Main oscillator frequency          */
-#define RTC_CLK     (   32000UL)        /* RTC oscillator frequency           */
-#define IRC_OSC     ( 4000000UL)        /* Internal RC oscillator frequency   */
-
-/* F_cco0 = (2 * M * F_in) / N  */
-#define __M               (((PLL0CFG_Val      ) & 0x7FFF) + 1)
-#define __N               (((PLL0CFG_Val >> 16) & 0x00FF) + 1)
-#define __FCCO(__F_IN)    ((2 * __M * __F_IN) / __N) 
-#define __CCLK_DIV        (((CCLKCFG_Val      ) & 0x00FF) + 1)
-
-/* Determine core clock frequency according to settings */
- #if (PLL0_SETUP)
-    #if   ((CLKSRCSEL_Val & 0x03) == 1)
-        #define __CORE_CLK (__FCCO(OSC_CLK) / __CCLK_DIV)
-    #elif ((CLKSRCSEL_Val & 0x03) == 2)
-        #define __CORE_CLK (__FCCO(RTC_CLK) / __CCLK_DIV)
-    #else 
-        #define __CORE_CLK (__FCCO(IRC_OSC) / __CCLK_DIV)
-    #endif
- #endif
-
-
-/*----------------------------------------------------------------------------
-  Clock Variable definitions
- *----------------------------------------------------------------------------*/
-uint32_t SystemCoreClock = __CORE_CLK;/*!< System Clock Frequency (Core Clock)*/
-
-/*----------------------------------------------------------------------------
-  Clock functions
- *----------------------------------------------------------------------------*/
-void SystemCoreClockUpdate (void)            /* Get Core Clock Frequency      */
-{
-  /* Determine clock frequency according to clock register values             */
-  if (((LPC_SC->PLL0STAT >> 24) & 3) == 3) { /* If PLL0 enabled and connected */
-    switch (LPC_SC->CLKSRCSEL & 0x03) {
-      case 0:                                /* Int. RC oscillator => PLL0    */
-      case 3:                                /* Reserved, default to Int. RC  */
-        SystemCoreClock = (IRC_OSC * 
-                          (((2 * ((LPC_SC->PLL0STAT & 0x7FFF) + 1))) /
-                          (((LPC_SC->PLL0STAT >> 16) & 0xFF) + 1))   /
-                          ((LPC_SC->CCLKCFG & 0xFF)+ 1));
-        break;
-      case 1:                                /* Main oscillator => PLL0       */
-        SystemCoreClock = (OSC_CLK * 
-                          (((2 * ((LPC_SC->PLL0STAT & 0x7FFF) + 1))) /
-                          (((LPC_SC->PLL0STAT >> 16) & 0xFF) + 1))   /
-                          ((LPC_SC->CCLKCFG & 0xFF)+ 1));
-        break;
-      case 2:                                /* RTC oscillator => PLL0        */
-        SystemCoreClock = (RTC_CLK * 
-                          (((2 * ((LPC_SC->PLL0STAT & 0x7FFF) + 1))) /
-                          (((LPC_SC->PLL0STAT >> 16) & 0xFF) + 1))   /
-                          ((LPC_SC->CCLKCFG & 0xFF)+ 1));
-        break;
-    }
-  } else {
-    switch (LPC_SC->CLKSRCSEL & 0x03) {
-      case 0:                                /* Int. RC oscillator => PLL0    */
-      case 3:                                /* Reserved, default to Int. RC  */
-        SystemCoreClock = IRC_OSC / ((LPC_SC->CCLKCFG & 0xFF)+ 1);
-        break;
-      case 1:                                /* Main oscillator => PLL0       */
-        SystemCoreClock = OSC_CLK / ((LPC_SC->CCLKCFG & 0xFF)+ 1);
-        break;
-      case 2:                                /* RTC oscillator => PLL0        */
-        SystemCoreClock = RTC_CLK / ((LPC_SC->CCLKCFG & 0xFF)+ 1);
-        break;
-    }
-  }
-}
-
-/**
- * Initialize the system
- *
- * @param  none
- * @return none
- *
- * @brief  Setup the microcontroller system.
- *         Initialize the System and update the SystemFrequency variable.
- */
-void SystemInit (void)
-{
-#if (CLOCK_SETUP)                       /* Clock Setup                        */
-  LPC_SC->SCS       = SCS_Val;
-  if (SCS_Val & (1 << 5)) {             /* If Main Oscillator is enabled      */
-    while ((LPC_SC->SCS & (1 << 6)) == 0);  /* Wait for Oscillator to be ready    */
-  }
-
-  LPC_SC->CCLKCFG   = CCLKCFG_Val;          /* Setup Clock Divider                */
-
-#if (PLL0_SETUP)
-  LPC_SC->CLKSRCSEL = CLKSRCSEL_Val;        /* Select Clock Source for PLL0       */
-  LPC_SC->PLL0CFG   = PLL0CFG_Val;
-  LPC_SC->PLL0CON   = 0x01;                 /* PLL0 Enable                        */
-  LPC_SC->PLL0FEED  = 0xAA;
-  LPC_SC->PLL0FEED  = 0x55;
-  while (!(LPC_SC->PLL0STAT & (1 << 26)));  /* Wait for PLOCK0                    */
-
-  LPC_SC->PLL0CON   = 0x03;                 /* PLL0 Enable & Connect              */
-  LPC_SC->PLL0FEED  = 0xAA;
-  LPC_SC->PLL0FEED  = 0x55;
-#endif
-
-  LPC_SC->USBCLKCFG = USBCLKCFG_Val;        /* Setup USB Clock Divider            */
-#endif
-
-  LPC_SC->PCLKSEL0  = PCLKSEL0_Val;         /* Peripheral Clock Selection         */
-  LPC_SC->PCLKSEL1  = PCLKSEL1_Val;
-
-  LPC_SC->PCONP     = PCONP_Val;            /* Power Control for Peripherals      */
-    
-  // Setup MAM
-  LPC_SC->MAMTIM      = MAMTIM_Val;
-  LPC_SC->MAMCR       = MAMCR_Val;
-}