LPC3250 Perpheral Base Registers

LPC3250 Perpheral Base Registers

基地址定义：

    LPC3250外设众多，无法将全部的寄存器做成一个头文件，或者列出全部的寄存器和地址。

移植代码将每个外围部件的基地址做成一个文件platform.h，然后为每个外设再编写单独的外设寄存器列表（偏移量），如lpc32xx_gpio.h等等。

platform.h文件内容如下：

/*

 * asm-arm/arch-lpc32xx/platform.h

 *

 * Author: Kevin Wells

 *

 * Copyright (C) 2008 NXP Semiconductors

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

#ifndef __LPC32XX_PLATFORM_H__

#define __LPC32XX_PLATFORM_H__

#include

/*

 * AHB 0 physical base addresses

 */

#define SLC_BASE  0x20020000

#define SSP0_BASE       0x20084000

#define SPI1_BASE  0x20088000

#define SSP1_BASE       0x2008C000

#define SPI2_BASE       0x20090000

#define I2S0_BASE       0x20094000

#define SD_BASE         0x20098000

#define I2S1_BASE       0x2009C000

#define MLC_BASE        0x200A8000

#define AHB0_START      SLC_BASE

#define AHB0_SIZE       ((MLC_BASE - SLC_BASE) + SZ_4K)

/*

 * AHB 1 physical base addresses

 */

#define DMA_BASE        0x31000000

#define USB_BASE        0x31020000

#define USBH_BASE       0x31020000

#define USB_OTG_BASE    0x31020000

#define OTG_I2C_BASE    0x31020300

#define LCD_BASE        0x31040000

#define ETHERNET_BASE  0x31060000

#define EMC_BASE        0x31080000

#define ETB_CFG_BASE  0x310C0000

#define ETB_DATA_BASE  0x310E0000

#define AHB1_START      DMA_BASE

#define AHB1_SIZE       ((EMC_BASE - DMA_BASE) + SZ_4K)

/*

 * FAB physical base addresses

 */

#define CLK_PM_BASE  0x40004000

#define MIC_BASE        0x40008000

#define SIC1_BASE       0x4000C000

#define SIC2_BASE       0x40010000

#define HS_UART1_BASE  0x40014000

#define HS_UART2_BASE  0x40018000

#define HS_UART7_BASE  0x4001C000

#define RTC_BASE        0x40024000

#define RTC_RAM_BASE  0x40024080

#define GPIO_BASE       0x40028000

#define PWM3_BASE       0x4002C000

#define PWM4_BASE       0x40030000

#define MSTIM_BASE      0x40034000

#define HSTIM_BASE  0x40038000

#define WDTIM_BASE      0x4003C000

#define DEBUG_CTRL_BASE 0x40040000

#define TIMER0_BASE     0x40044000

#define ADC_BASE        0x40048000

#define TIMER1_BASE     0x4004C000

#define KSCAN_BASE  0x40050000

#define UART_CTRL_BASE  0x40054000

#define TIMER2_BASE     0x40058000

#define PWM1_BASE  0x4005C000

#define PWM2_BASE  0x4005C004

#define TIMER3_BASE     0x40060000

/*

 * APB physical base addresses

 */

#define UART3_BASE  0x40080000

#define UART4_BASE  0x40088000

#define UART5_BASE  0x40090000

#define UART6_BASE  0x40098000

#define I2C1_BASE  0x400A0000

#define I2C2_BASE  0x400A8000

/* FAB and APB base and sizing */

#define FABAPB_START    CLK_PM_BASE

#define FABAPB_SIZE     ((I2C2_BASE - CLK_PM_BASE) + SZ_4K)

/*

 * Internal memory Bases

 */

#define IRAM_BASE       0x08000000

#define IROM_BASE       0x0C000000

/*

 * External Static Memory Bank Address Space Bases

 */

#define EMC_CS0_BASE  0xE0000000

#define EMC_CS1_BASE  0xE1000000

#define EMC_CS2_BASE  0xE2000000

#define EMC_CS3_BASE  0xE3000000

/*

 * External SDRAM Memory Bank Address Space Bases

 */

#define EMC_DYCS0_BASE  0x80000000

#define EMC_DYCS1_BASE  0xA0000000

/*

 * Clock and crystal information

 */

#define MAIN_OSC_FREQ    13000000

#define CLOCK_OSC_FREQ   32768

#endif

寄存器操作示例：

    首先定义各个外设寄存器的偏移地址：

#define GPIO_P3_INP_STATE(x) (x + 0x000)

#define GPIO_P3_OUTP_SET(x) (x + 0x004)

#define GPIO_P3_OUTP_CLR(x) (x + 0x008)

#define GPIO_P3_OUTP_STATE(x) (x + 0x00C)

#define GPIO_P3_MUX_SET(x) (x + 0x110)

#define GPIO_P3_MUX_CLR(x) (x + 0x114)

#define GPIO_P3_MUX_STATE(x) (x + 0x118)

    

    然后通过io_p2v将各基地址的物理地址转换成虚拟地址：

#define TIMER0_IOBASE io_p2v(TIMER0_BASE)

#define CLKPWR_IOBASE io_p2v(CLK_PM_BASE)

#define GPIO_IOBASE io_p2v(GPIO_BASE)

    最后使用__raw_writel或者__raw_readl函数进行操作：

__raw_writel(OUTP_STATE_GPO(1), GPIO_P3_OUTP_SET(GPIO_IOBASE));