linux 下标准spi操作程序

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdarg.h> #include <stdarg.h> #include <fcntl.h> #include <unistd.h> #include "imx6ull_mtd_flash_api.h" void usage(char **argv) { printf("usage:\n"); printf("%s -f {0/1} -e {addr len} / -w {addr val} / -r {addr len} \n",argv[0]); } int main(int argc, char **argv) { int fd; int ret; unsigned int i; extern char *optarg; signed char command; char flash_mtd_path[32]; char flash_mtdblock_path[32]; unsigned int flash_node; unsigned int flash_mode=-1; unsigned int addr; unsigned char val; unsigned int len; unsigned char data[128]; if (argc < 2) { usage(argv); return -1; } while ((command = getopt(argc, argv, "f:e:w:r:")) != -1) { switch (command) { case 'f': flash_node = strtol(optarg,NULL,10); break; case 'e': flash_mode = 1; break; case 'w': flash_mode = 2; break; case 'r': flash_mode = 3; break; default: usage(argv); return -1; } } sprintf(flash_mtd_path, "%s%d", "/dev/mtd",flash_node); sprintf(flash_mtdblock_path, "%s%d", "/dev/mtdblock",flash_node); #if 0 printf("flash_mtd_path=%s\n",flash_mtd_path); printf("flash_mtdblock_path=%s\n",flash_mtdblock_path); #endif switch(flash_mode) { case 1: addr = strtol(argv[4],NULL,16); len = atoi(argv[5]); ret = erase_flash(flash_mtd_path, addr, len); if(ret < 0) { printf("fail to erase flash %s, in %s\n", flash_mtd_path, __func__); return -1; } break; case 2: addr = strtol(argv[4],NULL,16); val = strtol(argv[5],NULL,16); ret = write_flash(flash_mtdblock_path, &val, 1, addr); if(ret < 0) { printf("fail to write flash %s, in %s\n", flash_mtdblock_path, __func__); return -1; } break; case 3: addr = strtol(argv[4],NULL,16); len = atoi(argv[5]); ret = read_flash(flash_mtdblock_path, addr, len, data); if(ret < 0) { printf("fail to read flash %s, in %s\n", flash_mtdblock_path, __func__); return -1; } #if 1 for(i=0; i<len; i++) { if(i%8 == 0) printf("\n"); printf("0x%x\t",data[i]); } #endif break; default : break; } return 0; }