move lpc_chip_13xx files

hw/mcu/nxp/lpc_chip_13xx/src/sysinit_13xx.c

@@ -0,0 +1,132 @@
+/*
+ * @brief LPC13xx Chip specific SystemInit
+ *
+ * @note
+ * Copyright(C) NXP Semiconductors, 2013
+ * 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.
+ */
+
+#include "chip.h"
+
+/*****************************************************************************
+ * Private types/enumerations/variables
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Public types/enumerations/variables
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Private functions
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Public functions
+ ****************************************************************************/
+
+/* Setup system clocking */
+void Chip_SetupXtalClocking(void)
+{
+	volatile int i;
+
+	/* Powerup main oscillator */
+	Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_SYSOSC_PD);
+
+	/* Wait an estimated 200us for OSC to be stablized, no status
+	indication, dummy wait */
+	for (i = 0; i < 0x200; i++) {}
+
+	/* Set system PLL input to main oscillator */
+	Chip_Clock_SetSystemPLLSource(SYSCTL_PLLCLKSRC_SYSOSC);
+
+	/* Power down PLL to change the PLL divider ratio */
+	Chip_SYSCTL_PowerDown(SYSCTL_POWERDOWN_SYSPLL_PD);
+
+	/* Setup PLL for main oscillator rate (FCLKIN = 12MHz) * 6 = 72MHz
+	MSEL = 5 (this is pre-decremented), PSEL = 1 (for P = 2)
+	FCLKOUT = FCLKIN * (MSEL + 1) = 12MHz * 6 = 72MHz
+	FCCO = FCLKOUT * 2 * P = 72MHz * 2 * 2 = 288MHz (within FCCO range) */
+	Chip_Clock_SetupSystemPLL(5, 1);
+
+	/* Powerup system PLL */
+	Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_SYSPLL_PD);
+
+	/* Wait for PLL to lock */
+	while (!Chip_Clock_IsSystemPLLLocked()) {}
+
+	/* Set system clock divider to 1 */
+	Chip_Clock_SetSysClockDiv(1);
+
+	/* Setup FLASH access to 3 clocks (72MHz clock) */
+	Chip_FMC_SetFLASHAccess(FLASHTIM_72MHZ_CPU);
+
+	/* Set main clock source to the system PLL. This will drive 72MHz
+	for the main clock and 72MHz for the system clock */
+	Chip_Clock_SetMainClockSource(SYSCTL_MAINCLKSRC_PLLOUT);
+}
+
+/* Set up and initialize hardware prior to call to main */
+void Chip_SetupIrcClocking(void)
+{
+	/* IRC should be powered up */
+	Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_IRC_PD);
+	Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_IRCOUT_PD);
+
+	/* Set system PLL input to main oscillator */
+	Chip_Clock_SetSystemPLLSource(SYSCTL_PLLCLKSRC_IRC);
+
+	/* Power down PLL to change the PLL divider ratio */
+	Chip_SYSCTL_PowerDown(SYSCTL_POWERDOWN_SYSPLL_PD);
+
+	/* Setup PLL for main oscillator rate (FCLKIN = 12MHz) * 6 = 72MHz
+	MSEL = 5 (this is pre-decremented), PSEL = 1 (for P = 2)
+	FCLKOUT = FCLKIN * (MSEL + 1) = 12MHz * 6 = 72MHz
+	FCCO = FCLKOUT * 2 * P = 72MHz * 2 * 2 = 288MHz (within FCCO range) */
+	Chip_Clock_SetupSystemPLL(5, 1);
+
+	/* Powerup system PLL */
+	Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_SYSPLL_PD);
+
+	/* Wait for PLL to lock */
+	while (!Chip_Clock_IsSystemPLLLocked()) {}
+
+	/* Set system clock divider to 1 */
+	Chip_Clock_SetSysClockDiv(1);
+
+	/* Setup FLASH access to 3 clocks */
+	Chip_FMC_SetFLASHAccess(FLASHTIM_72MHZ_CPU);
+
+	/* Set main clock source to the system PLL. This will drive 48MHz
+	   for the main clock and 48MHz for the system clock */
+	Chip_Clock_SetMainClockSource(SYSCTL_MAINCLKSRC_PLLOUT);
+}
+
+/* Set up and initialize hardware prior to call to main */
+void Chip_SystemInit(void)
+{
+	/* Initial internal clocking */
+	Chip_SetupIrcClocking();
+}