FM25L256的驱动测试

存储技术

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描述

  FM25L256是由RAMTRON生产,以铁电存储介质的256Kb(32K字节)串行3V非易失性存储器,采用SPI总线控制,构成的系统具有简单,占用硬件资源少,存取快速的特点。下面将具体的来说说FM25L256的驱动测试。

  基于linux2.6.30实现spi驱动的应用层测试程序如下:

  #include 《stdio.h》

  #include 《stdint.h》

  #include 《string.h》

  #include 《fcntl.h》

  #include 《sys/ioctl.h》

  #include 《linux/types.h》

  #include 《linux/spi/spidev.h》

  #define SPI_DEVICE “/dev/spidev1.0”

  //fm25L256 cmd

  #define FM_OPT_WREN 0x06

  #define FM_OPT_WRDI 0x04

  #define FM_OPT_RDSR 0x05

  #define FM_OPT_WRSR 0x01

  #define FM_OPT_ERAD 0x03

  #define FM_OPT_WRIT 0x02

  //fm25l256 para

  #define FM_ADDR_MAX 0x7fff

  #define FM_MODE SPI_MODE_0

  #define FM_BITS 8

  #define FM_FREQ_MAX 50000000

  #define FM_OPT_ADDR 0x0

  static uint8_t gMode = FM_MODE;

  static uint8_t gBits = FM_BITS;

  static uint32_t gSpeed = FM_FREQ_MAX;

  static uint16_t gOptAddr = FM_OPT_ADDR;

  uint8_t gLsb;

  static int spi_write_read(int fd, const uint8_t *wbuf, int wlen, uint8_t *rbuf, int rlen){

  int ret = 0;

  struct spi_ioc_transfer tr[2] = {

  {

  .tx_buf = (unsigned long)wbuf,

  .rx_buf = 0,

  .len = wlen,

  .speed_hz = 5000000,

  },

  {

  .tx_buf = 0,

  .rx_buf = (unsigned long)rbuf,

  .len = rlen,

  .speed_hz = 5000000,

  },

  };

  ret = ioctl(fd, SPI_IOC_MESSAGE(2), tr);

  return ret;

  }

  static int spi_write_only(int fd, const uint8_t *wbuf, int wlen, uint8_t *rbuf, int rlen){

  int ret = 0;

  struct spi_ioc_transfer tr[1] = {

  {

  .tx_buf = (unsigned long)wbuf,

  .rx_buf = 0,

  .len = wlen,

  .speed_hz = 5000000,

  },

  };

  ret = ioctl(fd, SPI_IOC_MESSAGE(1), tr);

  return ret;

  }

  int main(int argc, char *argv[]){

  int fd;

  int index;

  int optSize;

  int ret;

  int i;

  int tmpSize;

  uint8_t rdBuf[128];

  uint8_t wrBuf[128];

  uint8_t cmd;

  if(argc != 2){

  printf(“argc error.\n”);

  return -1;

  }

  tmpSize = atoi(argv[1]);

  fd = open(SPI_DEVICE, O_RDWR);

  if(fd 《 0){

  printf(“open spi file error.\n”);

  return -1;

  }

  //mode

  ret = ioctl(fd, SPI_IOC_WR_MODE, &gMode);

  if(ret 《 0){

  printf(“set wr mode error.\n”);

  close(fd);

  return -1;

  }

  //bits

  ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &gBits);

  if(ret 《 0){

  printf(“set bits error.\n”);

  close(fd);

  return -1;

  }

  //speed

  ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &gSpeed);

  if(ret 《 0){

  printf(“set speed error.\n”);

  close(fd);

  return -1;

  }

  //get mode

  ret = ioctl(fd, SPI_IOC_RD_MODE, &gMode);

  printf(“FM Mode: %d.\n”,gMode);

  //get bits

  ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &gBits);

  printf(“FM bits:%d.\n”, gBits);

  //get speed

  ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &gSpeed);

  printf(“FM speed:%d.\n”, gSpeed);

  //get lsb

  ret = ioctl(fd, SPI_IOC_RD_LSB_FIRST, &gLsb);

  printf(“FM lsb:%d.\n”, gLsb);

  #if 0 //---------------------- method 1 ----------------------------

  cmd = FM_OPT_WREN;

  ret = write(fd, &cmd, sizeof(cmd));

  if(ret 《 0 )

  printf(“write wren error.err = %d\n”, ret);

  else

  printf(“write wren ok.\n”);

  index = 0;

  wrBuf[index++] = FM_OPT_WRIT;

  wrBuf[index++] = (gOptAddr》》8)&0xff;

  wrBuf[index++] = (gOptAddr》》0)&0xff;

  srand((unsigned)time(NULL));

  printf(“write data = \n”);

  if(tmpSize){

  for(i = 0; i 《 tmpSize; i++){

  rdBuf[i] = 1 + rand()%100+1;

  printf(“%02x ”, rdBuf[i]);

  }

  }

  else{

  tmpSize = 128;

  for(i = 0; i 《 tmpSize; i++){

  rdBuf[i] = 0;

  printf(“%02x ”, rdBuf[i]);

  }

  }

  printf(“\n”);

  memcpy(&wrBuf[index], rdBuf,tmpSize);

  index += tmpSize;

  optSize = index;

  //ret = spi_write_read(fd, wrBuf, optSize, 0, 0);

  ret = spi_write_only(fd, wrBuf,optSize, 0, 0);

  if(ret 《 0)

  printf(“write error,err = %d\n”, ret);

  else

  printf(“write ok.ret = %d\n”, ret);

  memset(rdBuf, 0, sizeof(rdBuf));

  cmd = FM_OPT_ERAD;

  index = 0;

  wrBuf[index++] = cmd;

  wrBuf[index++] = (gOptAddr》》8)&0xff;

  wrBuf[index++] = (gOptAddr》》0)&0xff;

  ret = spi_write_read(fd, wrBuf, index, rdBuf, sizeof(rdBuf));

  if(ret 《 0){

  printf(“read error, err = %d\n”, ret);

  }

  else{

  printf(“read ok.ret = %d, data = \n”, ret);

  for(index = 0; index 《 sizeof(rdBuf); index++){

  printf(“%02x ”, rdBuf[index]);

  }

  printf(“\n”);

  }

  #endif //endof method 1 ------------------------------

  #if 1

  //**************** method 2 *******************

  cmd = FM_OPT_WREN;

  ret = write(fd, &cmd, sizeof(cmd));

  if(ret 《 0 )

  printf(“write wren error.err = %d\n”, ret);

  else

  printf(“write wren ok.\n”);

  index = 0;

  //wrBuf[index++] = FM_OPT_WREN; //fail

  wrBuf[index++] = FM_OPT_WRIT;

  wrBuf[index++] = (gOptAddr》》8)&0xff;

  wrBuf[index++] = (gOptAddr》》0)&0xff;

  srand((unsigned)time(NULL));

  printf(“write data = \n”);

  if(tmpSize){

  for(i = 0; i 《 tmpSize; i++){

  rdBuf[i] = 1 + rand()%100+1;

  printf(“%02x ”, rdBuf[i]);

  }

  }

  else{

  tmpSize = 128;

  for(i = 0; i 《 tmpSize; i++){

  rdBuf[i] = 0;

  printf(“%02x ”, rdBuf[i]);

  }

  }

  printf(“\n”);

  memcpy(&wrBuf[index], rdBuf,tmpSize);

  index += tmpSize;

  ret = write(fd, wrBuf, index);

  if(ret 《 0 )

  printf(“write error.err = %d\n”, ret);

  else

  printf(“write ok.ret = %d\n”, ret);

  memset(rdBuf, 0, sizeof(rdBuf));

  index = 0;

  wrBuf[index++] = FM_OPT_ERAD;

  wrBuf[index++] = (gOptAddr》》8)&0xff;

  wrBuf[index++] = (gOptAddr》》0)&0xff;

  ret = spi_write_read(fd, wrBuf, index, rdBuf, sizeof(rdBuf));

  if(ret 《 0 )

  printf(“read error.err = %d\n”, ret);

  else

  printf(“read ok.ret = %d\n”, ret);

  #if 0 //-- fail

  ret = write(fd, wrBuf, index);

  ret = read(fd, rdBuf, 100);

  if(ret 《 0 )

  printf(“read error.err = %d\n”, ret);

  else

  printf(“read wren ok.ret = %d\n”, ret);

  #endif

  printf(“data = \n”);

  for(index = 0; index 《 sizeof(rdBuf); index++){

  printf(“%02x ”, rdBuf[index]);

  }

  printf(“\n”);

  #endif

  //********************************************************************************/

  close(fd);

  return 0;

  }

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