城市奇幻冒險之旅

2019年6月30日星期日

電腦dpkg lsit 安照日期方式

$ find /var/lib/dpkg/info -name "*.list" -exec stat -c $'%n\t%y' {} \; | \

sed -e 's,/var/lib/dpkg/info/,,' -e 's,\.list\t,\t,' | \

sort > ~/dpkglist.dates

adduser 2018-07-26 13:50:36.000000000 +0000 adwaita-icon-theme 2018-09-03 16:40:03.000000000 +0000 apt 2018-07-26 13:52:37.000000000 +0000 apt-transport-https 2018-08-08 23:54:04.000000000 +0000 aspell 2018-09-03 16:40:04.000000000 +0000 aspell-en 2018-09-03 16:40:04.000000000 +0000 base-files 2018-07-26 13:52:15.000000000 +0000 base-passwd 2018-07-26 13:50:36.000000000 +0000 bash 2018-07-26 13:52:16.000000000 +0000 binutils 2018-08-08 23:57:07.000000000 +0000 bsdutils 2018-07-26 13:52:16.000000000 +0000 build-essential 2018-08-08 23:57:17.000000000 +0000 bzip2 2018-08-08 23:57:07.000000000 +0000 ca-certificates 2018-08-08 23:54:05.000000000 +0000 cmake 2018-10-16 05:40:57.000000000 +0000 cmake-data 2018-10-16 05:40:56.000000000 +0000 coreutils 2018-07-26 13:52:17.000000000 +0000 cpp 2018-08-08 23:57:11.000000000 +0000 cpp-5 2018-08-08 23:57:11.000000000 +0000 cuda-command-line-tools-9-0 2018-08-08 23:57:21.000000000 +0000 cuda-core-9-0 2018-08-08 23:57:19.000000000 +0000 cuda-cublas-9-0 2018-08-08 23:55:25.000000000 +0000 cuda-cublas-dev-9-0 2018-08-08 23:57:28.000000000 +0000 cuda-cudart-9-0 2018-08-08 23:54:18.000000000 +0000 cuda-cudart-dev-9-0 2018-08-08 23:57:20.000000000 +0000 cuda-cufft-9-0 2018-08-08 23:55:35.000000000 +0000 cuda-cufft-dev-9-0 2018-08-08 23:57:35.000000000 +0000 cuda-curand-9-0 2018-08-08 23:55:37.000000000 +0000 cuda-curand-dev-9-0 2018-08-08 23:57:41.000000000 +0000 cuda-cusolver-9-0 2018-08-08 23:55:41.000000000 +0000 cuda-cusolver-dev-9-0 2018-08-08 23:57:42.000000000 +0000 cuda-cusparse-9-0 2018-08-08 23:55:45.000000000 +0000 cuda-cusparse-dev-9-0 2018-08-08 23:57:45.000000000 +0000 cuda-driver-dev-9-0 2018-08-08 23:57:20.000000000 +0000 cuda-libraries-9-0 2018-08-08 23:55:53.000000000 +0000 cuda-libraries-dev-9-0 2018-08-08 23:57:53.000000000 +0000 cuda-license-9-0 2018-08-08 23:54:18.000000000 +0000 cuda-minimal-build-9-0 2018-08-08 23:57:53.000000000 +0000 cuda-misc-headers-9-0 2018-08-08 23:57:18.000000000 +0000 cuda-npp-9-0 2018-08-08 23:55:52.000000000 +0000 cuda-npp-dev-9-0 2018-08-08 23:57:53.000000000 +0000 cuda-nvgraph-9-0 2018-08-08 23:55:47.000000000 +0000 cuda-nvgraph-dev-9-0 2018-08-08 23:57:47.000000000 +0000 cuda-nvml-dev-9-0 2018-08-08 23:57:53.000000000 +0000 cuda-nvrtc-9-0 2018-08-08 23:55:46.000000000 +0000 cuda-nvrtc-dev-9-0 2018-08-08 23:57:46.000000000 +0000 dash 2018-07-26 13:50:37.000000000 +0000 dbus 2018-09-03 16:39:49.000000000 +0000 dbus-x11 2018-09-03 16:40:04.000000000 +0000 dconf-gsettings-backend:amd64 2018-09-03 16:39:44.000000000 +0000 dconf-service 2018-09-03 16:39:44.000000000 +0000 debconf 2018-07-26 13:50:37.000000000 +0000 debianutils 2018-07-26 13:50:38.000000000 +0000 dh-python 2018-09-03 16:39:34.000000000 +0000 dictionaries-common 2018-09-03 16:40:04.000000000 +0000 diffutils 2018-07-26 13:50:38.000000000 +0000 dpkg 2018-07-26 13:52:18.000000000 +0000 dpkg-dev 2018-08-08 23:57:17.000000000 +0000 e2fslibs:amd64 2018-07-26 13:50:38.000000000 +0000 e2fsprogs 2018-07-26 13:50:39.000000000 +0000 emacs 2018-09-03 16:40:10.000000000 +0000 emacs24 2018-09-03 16:40:09.000000000 +0000 emacs24-bin-common 2018-09-03 16:40:07.000000000 +0000 emacs24-common 2018-09-03 16:40:07.000000000 +0000 emacs24-common-non-dfsg 2018-09-03 16:40:04.000000000 +0000 emacsen-common 2018-09-03 16:40:04.000000000 +0000 ffmpeg 2018-09-03 16:53:10.000000000 +0000 findutils 2018-07-26 13:50:39.000000000 +0000 fontconfig 2018-09-03 16:39:40.000000000 +0000 fontconfig-config 2018-09-03 16:39:39.000000000 +0000 fonts-arphic-bkai00mp 2018-10-16 05:39:56.000000000 +0000 fonts-arphic-bsmi00lp 2018-10-16 05:39:57.000000000 +0000 fonts-arphic-gbsn00lp 2018-10-16 05:39:57.000000000 +0000 fonts-arphic-gkai00mp 2018-10-16 05:39:57.000000000 +0000 fonts-arphic-ukai 2018-10-16 05:40:01.000000000 +0000 fonts-arphic-uming 2018-10-16 05:39:58.000000000 +0000 fonts-cabin 2018-09-03 16:40:10.000000000 +0000 fonts-cns11643-kai 2018-10-16 05:40:15.000000000 +0000 fonts-cns11643-sung 2018-10-16 05:40:21.000000000 +0000 fonts-comfortaa 2018-09-03 16:40:10.000000000 +0000 fonts-crosextra-caladea 2018-09-03 16:40:10.000000000 +0000 fonts-crosextra-carlito 2018-09-03 16:40:10.000000000 +0000 fonts-cwtex-fs 2018-10-16 05:40:02.000000000 +0000 fonts-cwtex-heib 2018-10-16 05:40:02.000000000 +0000 fonts-cwtex-kai 2018-10-16 05:40:03.000000000 +0000 fonts-cwtex-ming 2018-10-16 05:40:04.000000000 +0000 fonts-cwtex-yen 2018-10-16 05:40:05.000000000 +0000 fonts-dejavu 2018-10-16 05:40:05.000000000 +0000 fonts-dejavu-core 2018-09-03 16:39:38.000000000 +0000 fonts-dejavu-extra 2018-09-03 16:40:11.000000000 +0000 fonts-ebgaramond 2018-09-03 16:40:11.000000000 +0000 fonts-ebgaramond-extra 2018-09-03 16:40:11.000000000 +0000 fonts-font-awesome 2018-09-03 16:40:11.000000000 +0000 fonts-freefont-otf 2018-09-03 16:40:11.000000000 +0000 fonts-freefont-ttf 2018-09-03 16:39:39.000000000 +0000 fonts-gfs-artemisia 2018-09-03 16:40:12.000000000 +0000 fonts-gfs-complutum 2018-09-03 16:40:12.000000000 +0000 fonts-gfs-didot 2018-09-03 16:40:12.000000000 +0000 fonts-gfs-neohellenic 2018-09-03 16:40:12.000000000 +0000 fonts-gfs-olga 2018-09-03 16:40:12.000000000 +0000 fonts-gfs-solomos 2018-09-03 16:40:12.000000000 +0000 fonts-junicode 2018-09-03 16:40:12.000000000 +0000 fonts-lato 2018-09-03 16:39:40.000000000 +0000 fonts-liberation 2018-09-03 16:28:06.000000000 +0000 fonts-linuxlibertine 2018-09-03 16:40:12.000000000 +0000 fonts-lmodern 2018-09-03 16:40:13.000000000 +0000 fonts-lobster 2018-09-03 16:40:13.000000000 +0000 fonts-lobstertwo 2018-09-03 16:40:14.000000000 +0000 fonts-oflb-asana-math 2018-09-03 16:40:14.000000000 +0000 fonts-roboto-hinted 2018-09-03 16:40:14.000000000 +0000 fonts-sil-gentium 2018-09-03 16:40:14.000000000 +0000 fonts-sil-gentium-basic 2018-09-03 16:40:14.000000000 +0000 fonts-sil-gentiumplus 2018-09-03 16:40:15.000000000 +0000 fonts-stix 2018-09-03 16:40:36.000000000 +0000 fonts-wqy-zenhei 2018-10-16 05:39:59.000000000 +0000 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gsettings-desktop-schemas 2018-09-03 16:39:44.000000000 +0000 gzip 2018-07-26 13:50:39.000000000 +0000 hicolor-icon-theme 2018-09-03 16:39:50.000000000 +0000 hostname 2018-07-26 13:50:39.000000000 +0000 humanity-icon-theme 2018-09-03 16:40:02.000000000 +0000 imagemagick-common 2018-09-03 16:39:40.000000000 +0000 init 2018-07-26 13:52:20.000000000 +0000 initscripts 2018-07-26 13:50:39.000000000 +0000 init-system-helpers 2018-07-26 13:52:19.000000000 +0000 inkscape 2018-09-03 16:40:22.000000000 +0000 insserv 2018-07-26 13:50:39.000000000 +0000 jed 2018-09-03 16:40:22.000000000 +0000 jed-common 2018-09-03 16:40:22.000000000 +0000 libacl1:amd64 2018-07-26 13:50:39.000000000 +0000 libapparmor1:amd64 2018-07-26 13:52:27.000000000 +0000 libapt-pkg5.0:amd64 2018-07-26 13:52:35.000000000 +0000 libarchive13:amd64 2018-10-16 05:40:57.000000000 +0000 libasan2:amd64 2018-08-08 23:57:12.000000000 +0000 libasn1-8-heimdal:amd64 2018-08-08 23:54:03.000000000 +0000 libasound2:amd64 2018-09-03 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http://www.kbase101.com/question/21310.html

2019年6月14日星期五

Jetson nano系統從sd card搬移到usb3 ssd dongle

考慮將Jetson nano系統從sd card搬移到usb3 ssd dongle

https://devtalk.nvidia.com/default/topic/1051171/jetson-nano/how-to-connect-ssd-to-jetson-nano/

jetson nano監測cpu gpu 溫度

第一個方法，顯示的內容較為完整
$sudo jtop

這裡是github來源

https://github.com/rbonghi/jetson_stats

第二個方法，是早期監測gpu的方法，內容較為簡單

$sudo tegrastats

有關tegrastats操作可以查詢這裡

https://docs.nvidia.com/jetson/l4t/index.html#page/Tegra%2520Linux%2520Driver%2520Package%2520Development%2520Guide%2FAppendixTegraStats.html%23wwconnect_header

2016年8月26日星期五

Ubuntu14.04+win10雙系統破壞還原

參考連結
https://www.linux.com/learn/how-rescue-non-booting-grub-2-linux
grub rescue> ls
(Hd0) (hd0,msdos4)

grub rescue> set prefix=(hd0,msdos4)/boot/grub
grub rescue> set root=(hd0,msdos4)
grub rescue> insmod normal
grub rescue> normal

========================
grub rescue> insmod linux
grub rescue> linux /boot/vmlinuz-3.13.0-29-generic root=/dev/sda1
grub rescue> initrd /boot/initrd.img-3.13.0-29-generic
grub rescue> boot

2016年7月29日星期五

i2c沒問題版

#include <stdio.h>

#include <linux/types.h>

#include <stdlib.h>

#include <fcntl.h>

#include <unistd.h>

#include <sys/types.h>

#include <sys/ioctl.h>

#include <errno.h>

#include "delay.h"

#define I2C_RETRIES 0x0701

#define I2C_TIMEOUT 0x0702

#define I2C_RDWR 0x0707

#include <string.h>

#define STORAGE_DEV 0x56 /*Slave Device Address*/ //讀取位址是eeprom

struct i2c_msg {

unsigned short addr;

unsigned short flags;

#define I2C_M_TEN 0x0010

#define I2C_M_RD 0x0001

unsigned short len;

unsigned char *buf;

};

struct i2c_rdwr_ioctl_data{

struct i2c_msg *msgs;

int nmsgs;

};

struct i2c_rdwr_ioctl_data storage_data;

struct i2c_msg storage_msg[2];

int i2c_write(int fd, unsigned char slvAddr, unsigned char index, unsigned char * const data, unsigned char len )//將unsigned short index改為 unsigned char index

{

int ret;

unsigned char *tmp = (unsigned char*) malloc(1024);

if (tmp == NULL) {

perror("memory allocate error(write)!!");

return -1;

}

memcpy(tmp, (unsigned char *)&index, sizeof(unsigned char));

//printf("tmp firtst memcpy=%d\n",tmp);
memcpy((tmp + sizeof(unsigned char)), data, len);
//printf("tmp 2nd memcpy=%d\n",tmp);
len += sizeof(unsigned char);

/***write data to storage**/

storage_data.nmsgs = 1;

(storage_data.msgs[0]).len = len; // Data length

(storage_data.msgs[0]).addr = slvAddr;//Device Addr

(storage_data.msgs[0]).flags = 0; //write

(storage_data.msgs[0]).buf = tmp;

ret = ioctl(fd, I2C_RDWR, &storage_data);

if (tmp)

free(tmp);

return (ret < 0) ? -1 : 0;

}

int i2c_read(int fd, unsigned char slvAddr, unsigned short index, unsigned char *data, int len)

{

storage_data.nmsgs = 2;

(storage_data.msgs[0]).len = sizeof(unsigned short);

(storage_data.msgs[0]).addr = slvAddr;

(storage_data.msgs[0]).flags = 0; //Dummy write

(storage_data.msgs[0]).buf = (unsigned char *)&index;

(storage_data.msgs[1]).len = len;

(storage_data.msgs[1]).addr = slvAddr;

(storage_data.msgs[1]).flags = 1;

(storage_data.msgs[1]).buf = data;

if(ioctl(fd,I2C_RDWR, &storage_data) < 0){

perror("ioctl error");

return -1;

}

return 0;

}

int

i2c_transmit_data(int fd, unsigned char *data_ptr, unsigned char start_word_address ,unsigned char write_data_length)

{

int i, ret = 0;

unsigned char write_data_buffer[1024];

unsigned char transmit_legth = 4; //限制寫入的單位

memset(write_data_buffer, 0, 1024);

write_data_length = ((write_data_length > 1024) ? 1024 : write_data_length);

memcpy(write_data_buffer, data_ptr, write_data_length);
//printf("write_data_buffer=%s\n",write_data_buffer);

for (i = 0; i < write_data_length; i ++) {

if ((i % transmit_legth) == 0) {

int retry = 5;

do {

ret = i2c_write(fd, STORAGE_DEV, (start_word_address + i), (write_data_buffer + i), transmit_legth);
//i2c_write(fd, 0x56, 0x47, tmp_buffer1, 1 );
if(ret == 0) {

break;

}

mdelay(1);

} while (-- retry);

if (ret) {

printf("i2c write %i error!!!\n", i);

}

}

}

return ret;

}

int

i2c_receive_data(int fd, unsigned char *data_ptr, unsigned short start_word_address ,unsigned short read_data_length)

{

int i, ret = 0;

unsigned char read_data_buffer[1024];

unsigned short receive_legth = 16;

memset(read_data_buffer, 0x00, 1024);

read_data_length = ((read_data_length > 1024) ? 1024 : read_data_length);

for (i = 0; i < read_data_length; i ++) {

if ((i % receive_legth) == 0) {

int retry = 5;

do {

ret = i2c_read(fd, STORAGE_DEV, (start_word_address + i), (read_data_buffer + i), receive_legth);

if(ret == 0) {

break;

}

mdelay(1);

} while (-- retry);

if(ret == 0) {

#if 0

int count;

for (count = i; count < (i + receive_legth); count += 16) {

printf("%d. [%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x]\n", count

, read_data_buffer[count + 0]

, read_data_buffer[count + 1]

, read_data_buffer[count + 2]

, read_data_buffer[count + 3]

, read_data_buffer[count + 4]

, read_data_buffer[count + 5]

, read_data_buffer[count + 6]

, read_data_buffer[count + 7]

, read_data_buffer[count + 8]

, read_data_buffer[count + 9]

, read_data_buffer[count + 10]

, read_data_buffer[count + 11]

, read_data_buffer[count + 12]

, read_data_buffer[count + 13]

, read_data_buffer[count + 14]

, read_data_buffer[count + 15]

);

}

#endif

} else {

printf("i2c read %i error!!!\n", i);

}

}

}

if (ret == 0) {

memcpy(data_ptr, read_data_buffer, read_data_length);

}

return ret;

}

int str_isxdigit(char *tmp)

{

int i;

for (i = 0; i < strlen(tmp); i++) {

if (!isxdigit(tmp[i]))

return -1;

}

return 0;

}

int str_isdigit(char *tmp)

{

int i;

for (i = 0; i < strlen(tmp); i++) {//strlen是擷取字元長度 s[] = "You may go farther and fare worse."長度為 printf("%d\n", strlen(s)); =====>34

if (!isdigit(tmp[i])) //isdigit()判斷是否為數字還是字元，isdigit()為真是數字 isdigit()為假是字元

return -1;

}

return 0;

}

int main(int argc, char **argv)

{

int fd = 0, ret = 0;

int mode_type = 0; /*0: Read, 1: Write*/

unsigned long test_value = 0;

if ((argc == 3) && ((argv[1][0] == 'w') || (argv[1][0] == 'W'))) { //&&是and ||是or ((argv[1][0] == 'w') || (argv[1][0] == 'W'))則一成立即可，與(argc == 3) 都必成立

mode_type = 1; /*0: Read, 1: Write*/

if (str_isdigit(argv[2]) == 0) { //str_isdigit(argv[1])錯誤改為str_isdigit(argv[2])

if (str_isxdigit(argv[2]) == 0) { //傳入值錯誤造成,且執行ret為真

sscanf(argv[2], "%lx", &test_value);

printf("test_value = %08lx\n", test_value);

} else {

ret = -1;

}

} else {

ret = -1;

}

}

else if ((argc == 2) && ((argv[1][0] == 'r') || (argv[1][0] == 'R'))) {

mode_type = 0; /*0: Read, 1: Write*/

}

else {

ret = -1;

}

if (ret) {

printf("%s r ==> Read Double Word.\n", argv[0]);

printf("%s w 0x12345678 ==> Write Double Word.\n", argv[0]);

return 0;

}

storage_data.nmsgs = 2;

storage_data.msgs = storage_msg;

printf("hello\n");

fd = open("/dev/i2c-0",O_RDWR);

if(fd < 0){

perror("open I2C Dev error!!");

exit(1);

}

ioctl(fd, I2C_TIMEOUT, 1);/*set timeout value*/

ioctl(fd, I2C_RETRIES, 2);/*set retry times*/

#if 1

if (mode_type == 1) /*0: Read, 1: Write*/

{

//I2C Write

//Step 1. Transfer da16

unsigned char write_api_cmd_buf[64]={

/*Byte 0, Byte 1, Byte 2, Byte 3*/

/*DW00*/ 0x00, 0x00, 0x00, 0x00,

};

unsigned char i2c_data_length = 4;

//memcpy((write_api_cmd_buf + (0 * 4)), &test_value, 4); //<=====看不懂(write_api_cmd_buf + (0 * 4)) ==memcpy( write_api_cmd_buf , &test_value, 4);

memcpy(write_api_cmd_buf + (0 * 4), &test_value, 4);
//memcpy(write_api_cmd_buf + (1 * 4), &test_value, 4); //實驗新增
//memcpy(write_api_cmd_buf + (2 * 4), &test_value, 4); //實驗新增
//memcpy(write_api_cmd_buf + (3 * 4), &test_value, 4); /實驗新增

//printf("write_api_cmd_buf=%s\n",write_api_cmd_buf);
//}

i2c_transmit_data(fd, write_api_cmd_buf,0x00, i2c_data_length);

#if 0

{

int i;

unsigned char tmp_buffer[1024];

memset(tmp_buffer, 0x00, 1024);

i2c_receive_data(fd, tmp_buffer, 0x0000, i2c_data_length);

}

#endif

}

#endif

#if 1

if (mode_type == 0) /*0: Read, 1: Write*/

{

//test Read

//Step 1. Receive data

unsigned char write_api_cmd_buf[64]={

/*Byte 0, Byte 1, Byte 2, Byte 3*/

/*DW00*/ 0x00, 0x00, 0x00, 0x00,

};

unsigned short i2c_data_length = 4;

//i2c_transmit_data(fd, write_api_cmd_buf, 0x0000, i2c_data_length);

{

int i, ret;

unsigned char tmp_buffer[64];

memset(tmp_buffer, 0x00, 64);

ret = i2c_receive_data(fd, tmp_buffer, 0x0000, i2c_data_length);

if (ret == 0) {

printf("Data ==> 0x%08lX\n", *((unsigned long *)tmp_buffer + 0));

}

}

}

#endif

if (fd)

close(fd);

return 0;

}

2016年7月27日星期三

i2c讀取

#include <stdio.h>

#include <linux/types.h>

#include <stdlib.h>

#include <fcntl.h>

#include <unistd.h>

#include <sys/types.h>

#include <sys/ioctl.h>

#include <errno.h>

#include "delay.h"

#define I2C_RETRIES 0x0701

#define I2C_TIMEOUT 0x0702

#define I2C_RDWR 0x0707

#include <string.h>

#define STORAGE_DEV 0x56 /*Slave Device Address*/ //讀取位址是eeprom

struct i2c_msg {

unsigned short addr;

unsigned short flags;

#define I2C_M_TEN 0x0010

#define I2C_M_RD 0x0001

unsigned short len;

unsigned char *buf;

};

struct i2c_rdwr_ioctl_data{

struct i2c_msg *msgs;

int nmsgs;

};

struct i2c_rdwr_ioctl_data storage_data;

struct i2c_msg storage_msg[2];

int i2c_write(int fd, unsigned char slvAddr, unsigned short index, unsigned char * const data, unsigned char len )

{

int ret;

unsigned char *tmp = (unsigned char*) malloc(1024);

if (tmp == NULL) {

perror("memory allocate error(write)!!");

return -1;

}

memcpy(tmp, (unsigned char *)&index, sizeof(unsigned short));

memcpy((tmp + sizeof(unsigned short)), data, len);

len += sizeof(unsigned short);

/***write data to storage**/

storage_data.nmsgs = 1;

(storage_data.msgs[0]).len = len; // Data length

(storage_data.msgs[0]).addr = slvAddr;//Device Addr

(storage_data.msgs[0]).flags = 0; //write

(storage_data.msgs[0]).buf = tmp;

ret = ioctl(fd, I2C_RDWR, &storage_data);

if (tmp)

free(tmp);

return (ret < 0) ? -1 : 0;

}

int i2c_read(int fd, unsigned char slvAddr, unsigned short index, unsigned char *data, int len)

{

storage_data.nmsgs = 2;

(storage_data.msgs[0]).len = sizeof(unsigned short);

(storage_data.msgs[0]).addr = slvAddr;

(storage_data.msgs[0]).flags = 0; //Dummy write

(storage_data.msgs[0]).buf = (unsigned char *)&index;

(storage_data.msgs[1]).len = len;

(storage_data.msgs[1]).addr = slvAddr;

(storage_data.msgs[1]).flags = 1;

(storage_data.msgs[1]).buf = data;

if(ioctl(fd,I2C_RDWR, &storage_data) < 0){

perror("ioctl error");

return -1;

}

return 0;

}

int

i2c_transmit_data(int fd, unsigned char *data_ptr, unsigned short start_word_address ,unsigned short write_data_length)

{

int i, ret = 0;

unsigned char write_data_buffer[1024];

unsigned short transmit_legth = 16;

memset(write_data_buffer, 0, 1024);

write_data_length = ((write_data_length > 1024) ? 1024 : write_data_length);

memcpy(write_data_buffer, data_ptr, write_data_length);

for (i = 0; i < write_data_length; i ++) {

if ((i % transmit_legth) == 0) {

int retry = 5;

do {

ret = i2c_write(fd, STORAGE_DEV, (start_word_address + i), (write_data_buffer + i), transmit_legth);
//i2c_write(fd, 0x56, 0x47, tmp_buffer1, 1 );
if(ret == 0) {

break;

}

mdelay(1);

} while (-- retry);

if (ret) {

printf("i2c write %i error!!!\n", i);

}

}

}

return ret;

}

int

i2c_receive_data(int fd, unsigned char *data_ptr, unsigned short start_word_address ,unsigned short read_data_length)

{

int i, ret = 0;

unsigned char read_data_buffer[1024];

unsigned short receive_legth = 16;

memset(read_data_buffer, 0x00, 1024);

read_data_length = ((read_data_length > 1024) ? 1024 : read_data_length);

for (i = 0; i < read_data_length; i ++) {

if ((i % receive_legth) == 0) {

int retry = 5;

do {

ret = i2c_read(fd, STORAGE_DEV, (start_word_address + i), (read_data_buffer + i), receive_legth);

if(ret == 0) {

break;

}

mdelay(1);

} while (-- retry);

if(ret == 0) {

#if 0

int count;

for (count = i; count < (i + receive_legth); count += 16) {

printf("%d. [%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x]\n", count

, read_data_buffer[count + 0]

, read_data_buffer[count + 1]

, read_data_buffer[count + 2]

, read_data_buffer[count + 3]

, read_data_buffer[count + 4]

, read_data_buffer[count + 5]

, read_data_buffer[count + 6]

, read_data_buffer[count + 7]

, read_data_buffer[count + 8]

, read_data_buffer[count + 9]

, read_data_buffer[count + 10]

, read_data_buffer[count + 11]

, read_data_buffer[count + 12]

, read_data_buffer[count + 13]

, read_data_buffer[count + 14]

, read_data_buffer[count + 15]

);

}

#endif

} else {

printf("i2c read %i error!!!\n", i);

}

}

}

if (ret == 0) {

memcpy(data_ptr, read_data_buffer, read_data_length);

}

return ret;

}

int str_isxdigit(char *tmp)

{

int i;

for (i = 0; i < strlen(tmp); i++) {

if (!isxdigit(tmp[i]))

return -1;

}

return 0;

}

int str_isdigit(char *tmp)

{

int i;

for (i = 0; i < strlen(tmp); i++) {//strlen是擷取字元長度 s[] = "You may go farther and fare worse."長度為 printf("%d\n", strlen(s)); =====>34

if (!isdigit(tmp[i])) //isdigit()判斷是否為數字還是字元，isdigit()為真是數字 isdigit()為假是字元

return -1;

}

return 0;

}

int main(int argc, char **argv)

{

int fd = 0, ret = 0;

int mode_type = 0; /*0: Read, 1: Write*/

unsigned long test_value = 0;

if ((argc == 3) && ((argv[1][0] == 'w') || (argv[1][0] == 'W'))) { //&&是and ||是or ((argv[1][0] == 'w') || (argv[1][0] == 'W'))則一成立即可，與(argc == 3) 都必成立

mode_type = 1; /*0: Read, 1: Write*/

if (str_isdigit(argv[2]) == 0) { //str_isdigit(argv[1])錯誤改為str_isdigit(argv[2])

if (str_isxdigit(argv[2]) == 0) { //傳入值錯誤造成,且執行ret為真

sscanf(argv[2], "%lx", &test_value);

printf("test_value = %08lx\n", test_value);

} else {

ret = -1;

}

} else {

ret = -1;

}

}

else if ((argc == 2) && ((argv[1][0] == 'r') || (argv[1][0] == 'R'))) {

mode_type = 0; /*0: Read, 1: Write*/

}

else {

ret = -1;

}

if (ret) {

printf("%s r ==> Read Double Word.\n", argv[0]);

printf("%s w 0x12345678 ==> Write Double Word.\n", argv[0]);

return 0;

}

storage_data.nmsgs = 2;

storage_data.msgs = storage_msg;

printf("hello\n");

fd = open("/dev/i2c-0",O_RDWR);

if(fd < 0){

perror("open I2C Dev error!!");

exit(1);

}

ioctl(fd, I2C_TIMEOUT, 1);/*set timeout value*/

ioctl(fd, I2C_RETRIES, 2);/*set retry times*/

#if 1

if (mode_type == 1) /*0: Read, 1: Write*/

{

//I2C Write

//Step 1. Transfer data

unsigned char write_api_cmd_buf[64]={

/*Byte 0, Byte 1, Byte 2, Byte 3*/

/*DW00*/ 0x01, 0x00, 0x00, 0x00,

};

unsigned short i2c_data_length = 4;

memcpy((write_api_cmd_buf + (0 * 4)), &test_value, 4); //<=====看不懂(write_api_cmd_buf + (0 * 4))

//memcpy(write_api_cmd_buf, &test_value, 4);

printf("write_api_cmd_buf=%s\n",write_api_cmd_buf);
i2c_transmit_data(fd, write_api_cmd_buf,(0x0000), i2c_data_length);

#if 0

{

int i;

unsigned char tmp_buffer[1024];

memset(tmp_buffer, 0x00, 1024);

i2c_receive_data(fd, tmp_buffer, 0x0000, i2c_data_length);

}

#endif

}

#endif

#if 1

if (mode_type == 0) /*0: Read, 1: Write*/

{

//test Read

//Step 1. Receive data

unsigned char write_api_cmd_buf[64]={

/*Byte 0, Byte 1, Byte 2, Byte 3*/

/*DW00*/ 0x00, 0x00, 0x00, 0x00,

};

unsigned short i2c_data_length = 4;

//i2c_transmit_data(fd, write_api_cmd_buf, 0x0000, i2c_data_length);

{

int i, ret;

unsigned char tmp_buffer[64];

memset(tmp_buffer, 0x00, 64);

ret = i2c_receive_data(fd, tmp_buffer, 0x0000, i2c_data_length);

if (ret == 0) {

printf("Data ==> 0x%08lX\n", *((unsigned long *)tmp_buffer + 0));

}

}

}

#endif

if (fd)

close(fd);

return 0;

}

2016年7月19日星期二

10轉16進制

10轉16進制
http://forum.slime.com.tw/thread277654.html
#include<stdio.h>
#include<stdlib.h>

int main(void){
int num,i,j,x;
char s[999];
//char str[999]; 這是多餘的
// while(scanf("%d",&num)!=EOF) 這行 scanf 沒有輸入提示，會搞到後面很難除錯
while(1)
{
printf("\nInput DEC Number: "); // 增加的輸入提示
scanf("%d",&num)!=EOF;
j=0; // 把最下面的 j=0; 移上來比較容易了解作用: s 字串陣列 index 歸零
while (num!=0)
{
i=num%16; // 取餘數
switch(i)
{
case 10:
s[j]='a';
break;

case 11:
s[j]='b';
break;

case 12:
s[j]='c';
break;

case 13:
s[j]='d';
break;

case 14:
s[j]='e';
break;

case 15:
s[j]='f';
break;

default:
// s[j]=i; 資料格式錯誤，必須要把數值格式轉換成 "文字格式"。
s[j]=48+i; // 這一行是以 ASCII 編碼直接做換算。
}
num=num/16; //取商數，下一回的被除數
j+=1;
}
s[j]='\0'; // 以據 C/C++ 語言的字串特性，給予的字串結尾符號。

// j-=1; 可以直接並到接下來的 for loop 中。

printf("Otput HEX Number:["); // 增加的輸出顯示
//for (i=j;i>=0;i--)
// { printf("%s",s[i]); } 這是錯的，要顯示出字元，要用 %c 不然會錯誤，編譯後出現錯誤當機應該也是這裡

for (i=j-1;i>=0;i--)
{ printf("%c",s[i]); }

printf("]"); // 增加的輸出顯示
// j=0; 這行正確的作法，應該是要移到在上面的地方，需要明確的讓 s[j] 一開始規零的地方。
printf("\n");
}

return 0;
}

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