LPC1788配置XIP[NOR]+SDRAM

花了接近30个小时,网上资料聊聊无几,从如何用Keil下载NOR Flash,到如何执行,怎么让SDRAM用起来,一步一步,坑很多,但是都过去了.首先给个下载地址好了:LPC1788空白工程

先一步一步说说,首先就是初始化EMC[SDRAM+NOR],如果不会?那其实就是初始化各种IO,配置时序,还是不会吗?那算了,下面好像对你没什么意义了,我先发一下我的配置:

    LPC_SC->PCONP   	|= (1 << 11);
    LPC_SC->EMCDLYCTL   = 0x00101010;
    LPC_EMC->Control = 1;
    LPC_EMC->DynamicReadConfig = 1;
    LPC_EMC->DynamicRasCas0 = 0x00000303;
    LPC_EMC->DynamicRP = 0x00000002;
    LPC_EMC->DynamicRAS = 0x00000005;
    LPC_EMC->DynamicSREX = 0x00000009;
    LPC_EMC->DynamicAPR = 0x00000001;
    LPC_EMC->DynamicDAL = 0x00000005;
    LPC_EMC->DynamicWR = 0x00000002;
    LPC_EMC->DynamicRC = 0x00000007;
    LPC_EMC->DynamicRFC = 0x00000008;
    LPC_EMC->DynamicXSR = 0x00000009;
    LPC_EMC->DynamicRRD = 0x00000001;
    LPC_EMC->DynamicMRD = 0x00000003;
    LPC_EMC->DynamicConfig0 = 0x0000680;
    LPC_EMC->DynamicControl = 0x0183;
    for(i = 200 * 30; i; i--);
    LPC_EMC->DynamicControl = 0x0103;
    LPC_EMC->DynamicRefresh = 2;
    for(i = 256; i; --i);
    LPC_EMC->DynamicRefresh = 0x0000003A;
    LPC_EMC->DynamicControl    = 0x00000083;
    i = *((volatile uint32_t *)(0xA0000000 | (0x33 << 12)));
    LPC_EMC->DynamicControl = 0x0000;
    LPC_EMC->DynamicConfig0 |= (1 << 19);
    LPC_EMC->StaticConfig1   = 0x00000081;
    LPC_EMC->StaticWaitWen1  = 0x01;
    LPC_EMC->StaticWaitOen1  = 0x01;
    LPC_EMC->StaticWaitRd1   = 0x1f;
    LPC_EMC->StaticWaitPage1 = 0x1f;
    LPC_EMC->StaticWaitWr1   = 0x1f;
    LPC_EMC->StaticWaitTurn1 = 0x0f;

CPU运行在120MHz,我的SDRAM型号是W9825G6JH[32MB],我的NOR Flash型号是SST39VF3201B[4MB].然后点开Target Options:

QQ截图20150629232335

然后填写ROM,RAM大小:

QQ截图20150629232532

当然,如果你愿意分区的话,你甚至可以拆开几个段来写.而且一般代码都在外部的话,可以默认ROM在外部,IROM是非默认的.另外所谓分段加载的SCT文件,不需要,我们每个文件自己定义~

QQ截图20150629232939

然后需要编写Flash的算法,找来找去,就一个近似NOR的,拿来就改.切换到目录C:Keil_v5ARMFlashM29W640F,因为这个NOR时序跟我的还一样呢,于是打开FlashDev.c,加内容:

#ifdef SST39VF3201B
struct FlashDevice const FlashDevice  =  {
   FLASH_DRV_VERS,             // Driver Version, do not modify!
   "SST39VF3201B Flash",          // Device Na	 me
   EXT16BIT,                   // Device Type
   0x90000000,                 // Device Start Address
   0x00400000,                   // Device Size in Bytes (4MB)
   1024,                       // Programming Page Size
   0,                          // Reserved, must be 0
   0xFF,                       // Initial Content of Erased Memory
   100,                        // Program Page Timeout 100 mSec
   3000,                       // Erase Sector Timeout 3000 mSec
// Specify Size and Address of Sectors
   0x01000, 0x000000,          // Sector Size  8kB (  8 Sectors)
   SECTOR_END
};
#endif

然后,打开选择编译,生成目标FLM文件,你需要这个工程么,给你提供下载好了.M29W640F

找到刚才工程生成的FLM文件[FLM文件也提供下载:SST39VF3201B],然后别忘了给自己仿真器多加点目标RAM[用的是目标芯片SRAM].

QQ截图20150629234206

然而还不能下载,别急,因为你下载啊,需要一定的配置,比如说… 你还得先初始化总线,才能烧写对吧.所以我新建了一个文件叫SST39VF1601.ini啊,里面的内容,就是初始化了~

FUNC void PinSel(int p1, int n1, int f1)
{
    _WDWORD(0x4002C000 + (p1 * 32 + n1) * 4, 0x8 | f1);
}
FUNC void InitNORFlash(void)
{
    int i;
    PinSel(2,16,1);
    PinSel(2,17,1);
    PinSel(2,18,1);
    PinSel(2,20,1);
    PinSel(2,24,1);
    PinSel(2,28,1);
    PinSel(2,29,1);
    PinSel(2,30,1);
    PinSel(2,31,1);
    for(i = 0; i < 32; i++)
        PinSel(3,i,1);
    for(i = 0; i < 21; i++)
        PinSel(4,i,1);
    PinSel(4,24,1);
    PinSel(4,25,1);
    PinSel(4,30,1);
    PinSel(4,31,1);
    /* PCONP |= 1 << 11 */
    _WDWORD(0x400FC0C4, 0x04288FDE);    // Power On EMC
    /* EMCCONTROL |= 1 */
    _WDWORD(0x2009C000, 0x00000001);    // Enable EMC
    /* EMCDLYCTL */
    _WDWORD(0x400FC1DC, 0x00081818);    // Config data read delay
    /* EMCCONFIG */
    _WDWORD(0x2009C008, 0x00000000);    // Little endian mode
    /* STATICCONFIG1 */
    _WDWORD(0x2009C220, 0x00000081);    // 16bit data width
                                        // Disable asynchronous page mode
                                        // Read when active bits are low
                                        // No extend wait
    /* STATICWAITWEN1 */
    _WDWORD(0x2009C224, 0x00000001);    // WaitWEn
    /* STATICWAITOEN1 */
    _WDWORD(0x2009C228, 0x00000001);    // WaitOEn
    /* STATICWAITRD1 */
    _WDWORD(0x2009C22C, 0x0000001F);    // WaitRd
    /* STATICWAITPAGE1 */
    _WDWORD(0x2009C230, 0x0000001F);    // WaitPage
    /* STATICWAITWR1 */
    _WDWORD(0x2009C234, 0x0000001F);    // WaitWr
    /* STATICWAITTURN1 */
    _WDWORD(0x2009C238, 0x0000000F);    // WaitTurn
    _sleep_(100);
}

对了,这不是C函数,只是语法有点相近.然后再新一个文件JLink_Flash.ini啊,内容:

INCLUDE SST39VF1601.ini
InitNORFlash();                                 // Initialize memory

然后把文件载入到这儿:

QQ截图20150629234710

现在,Jlink 烧写片外Flash已经没压力,然而我要测试一下,所以新建了一个文件,内容如下:

#include 
#include "LPC177x_8x.h"
#include "SDRAM_TB.h"
uint32_t SDRAM_TB_RAM_A[0x400000];
uint32_t SDRAM_TB_RAM_B[0x400000];
void SDRAM_TB_RAM_FUNC(void){
	uint32_t i;
	for(i = 0;i<0x400000;i++){
		SDRAM_TB_RAM_A[i] = SDRAM_TB_RAM_B[i];
	}
	for(i = 0;i<0x400000;i++){
		if(SDRAM_TB_RAM_A[i] == SDRAM_TB_RAM_B[i]){
			SDRAM_TB_RAM_B[i]++;
		}else{
			while(1);
		}
	}
}

然后右击这个文件,编辑属性,指定所用RAM和ROM的位置:

QQ截图20150629235013

执行,爽吧:

QQ截图20150629235258

另外发现了没,片外RAM根本没初始化数值哦~ 对了EMC,总线配置了这么多,是不是还差个NAND,NAND可以干嘛,当然是... 存图片啊,字库啊.因为我板子上还有一块K9F1G08U0C-PCB0,我擦,如果字库在这儿,然后XIP NOR执行,片内还有,我究竟什么时候才用的完这些资源啊.

配置NAND就简单了,初始化EMC时候多初始化一下,就OK了.

LPC_EMC->Config         = 0x00000000;
LPC_EMC->StaticConfig2  = 0x00000080;
LPC_EMC->StaticWaitWen2 = 0x0;
LPC_EMC->StaticWaitRd2  = 0x2;
LPC_EMC->StaticWaitPage2 = 0x0;
LPC_EMC->StaticWaitWr2	= 0x0;
LPC_EMC->StaticWaitTurn2 = 0x0;
*NandFlash_CLE = NandFlash_RESET;

但是,我想详细就下回分解..

《LPC1788配置XIP[NOR]+SDRAM》有2个想法

  1. 老师好,咨询一下,我现在用的是LPC1788+SST39VF3201 需要把字库的BIN文件存储到SST39VF3201内,通过jflash进行烧写,但是无法直接写,那个算法文件该怎么写啊,还有写好了算法文件该怎么通过jflash添加进去呢?

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