TMS320VC5509使用nof flash AM29LV400

佚名 6年前 (2019-04-16) 随笔 515人围观抢沙发百度已收录

1. 硬件接口如下，其中nor flash的使用方法，写的时候和NAND FLASH是一样的，读的时候和DRAM是一样的

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2. 看下擦除指令和编程指令

3. 代码如下

#include <csl.h> #include <csl_pll.h> #include <csl_emif.h> #include <csl_chip.h> #include <stdio.h> #include <csl_gpio.h>

//#define AM29_FLASH_ADDR_BEGIN (*((unsigned int *)0x200000))
#define AM29_FLASH_ADDR_BEGIN   ((unsigned int *)0x200000)
#define DATA_BUF_LEN 20
/*锁相环的设置*/ PLL_Config myConfig = { 0,    //IAI: the PLL locks using the same process that was underway //before the idle mode was entered
  1,    //IOB: If the PLL indicates a break in the phase lock, //it switches to its bypass mode and restarts the PLL phase-locking //sequence
  6,    //PLL multiply value; multiply 12 times
  12             //Divide by 2 PLL divide value; it can be either PLL divide value //(when PLL is enabled), or Bypass-mode divide value //(PLL in bypass mode, if PLL multiply value is set to 1)
}; /*SDRAM的EMIF设置*/ EMIF_Config emiffig = { 0x221,     //EGCR : the MEMFREQ = 00,the clock for the memory is equal to cpu frequence // the WPE = 0 ,forbiden the writing posting when we debug the EMIF // the MEMCEN = 1,the memory clock is reflected on the CLKMEM pin // the NOHOLD = 1,HOLD requests are not recognized by the EMIF
  0xFFFF,    //EMI_RST: any write to this register resets the EMIF state machine
  0x3FFF,    //CE0_1: CE0 space control register 1 // MTYPE = 011,Synchronous DRAM(SDRAM),16-bit data bus width
  0xFFFF,   //CE0_2: CE0 space control register 2
  0x00FF,   //CE0_3: CE0 space control register 3 // TIMEOUT = 0xFF;
  0x1FFF,    //CE1_1: CE0 space control register 1 // Asynchronous, 16Bit
  0xFFFF,    //CE1_2: CE0 space control register 2
  0x00FF,    //CE1_3: CE0 space control register 3
  0x1FFF,    //CE2_1: CE0 space control register 1 // Asynchronous, 16Bit
  0xFFFF,    //CE2_2: CE0 space control register 2
  0x00FF,    //CE2_3: CE0 space control register 3

  0x1FFF,    //CE3_1: CE0 space control register 1
  0xFFFF,    //CE3_2: CE0 space control register 2
  0x00FF,    //CE3_3: CE0 space control register 3

  0x2911,   //SDC1: SDRAM control register 1 // TRC = 8 // SDSIZE = 0;SDWID = 0 // RFEN = 1 // TRCD = 2 // TRP = 2
  0x0410,    //SDPER : SDRAM period register // 7ns *4096
  0x07FF,    //SDINIT: SDRAM initialization register // any write to this register to init the all CE spaces, // do it after hardware reset or power up the C55x device
  0x0131    //SDC2: SDRAM control register 2 // SDACC = 0; // TMRD = 01; // TRAS = 0101; // TACTV2ACTV = 0001;
 }; 
void  delay(unsigned int d_time) { unsigned int loop = 0; while(d_time--) { loop = 1000; while(loop--); } } Uint16 ChipErase(void) { Uint16 i,Data; Uint32 TimeOut; *(AM29_FLASH_ADDR_BEGIN + 0x555) = 0xAA; *(AM29_FLASH_ADDR_BEGIN + 0x2AA) = 0x55; *(AM29_FLASH_ADDR_BEGIN + 0x555) = 0x80; *(AM29_FLASH_ADDR_BEGIN + 0x555) = 0xAA; *(AM29_FLASH_ADDR_BEGIN + 0x2AA) = 0x55; *(AM29_FLASH_ADDR_BEGIN + 0x555) = 0x10; i = 0; TimeOut = 0; delay(8000); while(i<5) { Data = *(AM29_FLASH_ADDR_BEGIN +  0x1FF); if    (Data == 0xFFFF)    i++; else    i=0; if ( ++TimeOut>0x1000000)    return (0); } for    (i=0;i<0x400;i++) { Data = *(AM29_FLASH_ADDR_BEGIN + i); if (Data !=0xFFFF)    return (0); } return  (1); } Uint16 FlashWrite(Uint32 RomStart, Uint16* buf_start, Uint16 Length) { Uint32 i,TimeOut; Uint16 Data1,Data2,j; for    (i=0;i<Length;i++) { *(AM29_FLASH_ADDR_BEGIN + 0x555)= 0xAA; *(AM29_FLASH_ADDR_BEGIN + 0x2AA)= 0x55; *(AM29_FLASH_ADDR_BEGIN + 0x555) = 0xA0; *(AM29_FLASH_ADDR_BEGIN + RomStart + i) = *(buf_start++); TimeOut = 0; j=0; delay(10); } while(j<5) { Data1 = *(AM29_FLASH_ADDR_BEGIN + RomStart + i); Data2 = *(AM29_FLASH_ADDR_BEGIN + RomStart + i); if    (Data1 == Data2)    j++; else    j=0; if ( ++TimeOut>0x1000000)    return (0); } return  (1); } void    FlashRead(Uint32    RomStart, Uint16* buf_start, Uint16 Length) { Uint32 i; for    (i=0;i<Length;i++) { *(buf_start++) =  (*((volatile    unsigned  int  *)(AM29_FLASH_ADDR_BEGIN + RomStart + i))); } } main() { Uint16 data_buf[DATA_BUF_LEN] = {0}; unsigned int i = 0; Uint16 write_buf[DATA_BUF_LEN] = {0x0001,0x0002,0x0003,0x0004,0x0005,0x0006,0x0007,0x0008,0x0009,0x0000, 0x0011,0x0012,0x0013,0x0014,0x0015,0x0016,0x0017,0x0018,0x0019,0x0010}; unsigned int test_data = 0; /*初始化CSL库*/ CSL_init(); /*EMIF为全EMIF接口*/ CHIP_RSET(XBSR,0x0a01); /*设置系统的运行速度为144MHz*/ PLL_config(&myConfig); /*初始化DSP的EMIF*/ EMIF_config(&emiffig); /*确定方向为输出*/ GPIO_RSET(IODIR,0xFF); GPIO_RSET(IODATA,0x00); ChipErase(); FlashWrite(0, write_buf, DATA_BUF_LEN); delay(1000); FlashRead(0, data_buf, DATA_BUF_LEN); for(i=0;i<DATA_BUF_LEN;i++) { if(write_buf[i] != data_buf[i]) { printf("test data error:%d",i); } } if(i == DATA_BUF_LEN) { printf("test data ok"); } for(;;); }