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/*
* File : board.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2009 RT-Thread Develop Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2009-01-05 Bernard first implementation
*/
#include <stdint.h>
#include <rthw.h>
#include <rtthread.h>
#include "board.h"
#include "usart.h"
/* ARM PLL configuration for RUN mode */
const clock_arm_pll_config_t armPllConfig = { .loopDivider = 100U };
/* SYS PLL configuration for RUN mode */
const clock_sys_pll_config_t sysPllConfig = { .loopDivider = 1U };
/* USB1 PLL configuration for RUN mode */
const clock_usb_pll_config_t usb1PllConfig = { .loopDivider = 0U };
static void BOARD_BootClockGate(void)
{
/* Disable all unused peripheral clock */
CCM->CCGR0 = 0x00C0000FU;
CCM->CCGR1 = 0x30000000U;
CCM->CCGR2 = 0x003F0030U;
CCM->CCGR3 = 0xF0000330U;
CCM->CCGR4 = 0x0000FF3CU;
CCM->CCGR5 = 0xF000330FU;
CCM->CCGR6 = 0x00FC0300U;
}
static void BOARD_BootClockRUN(void)
{
/* Boot ROM did initialize the XTAL, here we only sets external XTAL OSC freq */
CLOCK_SetXtalFreq(24000000U);
CLOCK_SetRtcXtalFreq(32768U);
CLOCK_SetMux(kCLOCK_PeriphClk2Mux, 0x1); /* Set PERIPH_CLK2 MUX to OSC */
CLOCK_SetMux(kCLOCK_PeriphMux, 0x1); /* Set PERIPH_CLK MUX to PERIPH_CLK2 */
/* Setting the VDD_SOC to 1.5V. It is necessary to config AHB to 600Mhz */
DCDC->REG3 = (DCDC->REG3 & (~DCDC_REG3_TRG_MASK)) | DCDC_REG3_TRG(0x12);
CLOCK_InitArmPll(&armPllConfig); /* Configure ARM PLL to 1200M */
#ifndef SKIP_SYSCLK_INIT
CLOCK_InitSysPll(&sysPllConfig); /* Configure SYS PLL to 528M */
#endif
#ifndef SKIP_USB_PLL_INIT
CLOCK_InitUsb1Pll(&usb1PllConfig); /* Configure USB1 PLL to 480M */
#endif
CLOCK_SetDiv(kCLOCK_ArmDiv, 0x1); /* Set ARM PODF to 0, divide by 2 */
CLOCK_SetDiv(kCLOCK_AhbDiv, 0x0); /* Set AHB PODF to 0, divide by 1 */
CLOCK_SetDiv(kCLOCK_IpgDiv, 0x3); /* Set IPG PODF to 3, divede by 4 */
CLOCK_SetMux(kCLOCK_PrePeriphMux, 0x3); /* Set PRE_PERIPH_CLK to PLL1, 1200M */
CLOCK_SetMux(kCLOCK_PeriphMux, 0x0); /* Set PERIPH_CLK MUX to PRE_PERIPH_CLK */
/* Disable unused clock */
BOARD_BootClockGate();
/* Power down all unused PLL */
CLOCK_DeinitAudioPll();
CLOCK_DeinitVideoPll();
CLOCK_DeinitEnetPll();
CLOCK_DeinitUsb2Pll();
/* Configure UART divider to default */
CLOCK_SetMux(kCLOCK_UartMux, 0); /* Set UART source to PLL3 80M */
CLOCK_SetDiv(kCLOCK_UartDiv, 0); /* Set UART divider to 1 */
/* Update core clock */
SystemCoreClockUpdate();
}
/**
* This is the timer interrupt service routine.
*
*/
void SysTick_Handler(void)
{
/* enter interrupt */
rt_interrupt_enter();
rt_tick_increase();
/* leave interrupt */
rt_interrupt_leave();
}
/**
* This function will initial LPC8XX board.
*/
void rt_hw_board_init()
{
BOARD_BootClockRUN();
SysTick_Config(SystemCoreClock / RT_TICK_PER_SECOND);
extern int imxrt_hw_usart_init(void);
imxrt_hw_usart_init();
#ifdef RT_USING_COMPONENTS_INIT
rt_components_board_init();
#endif
#ifdef RT_USING_CONSOLE
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif
#ifdef RT_USING_HEAP
rt_system_heap_init((void*)HEAP_BEGIN, (void*)HEAP_END);
#endif
}
/*@}*/
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