Hi,
On 09/03/2011 09:33, Thomas Mayer wrote:
thanks a lot for your help!
I already started to think that I'm the first person who try to run
barebox from a sd-card :D
works fine here on i.MX25 & 35 (and I can't remember if I tested it on 51).
Another question, is there any good way to get a debug or something like
that at this very early point of boot process?
Because I think to switch on the board and hope that something will send
to the serial port isn't the best way to debug :D
In chapter 7.4.1.4.2 of the i.mx35 datasheet I found something
interresting. It seems to be possible to query boot errors via serial
protocol.
But I couldn't find a example or a list of possible errors.
Has anyone tried to query errors this way?
please find attached a quick and dirty (I'm not a programmer) soft to load the
i.MX (tested on i.MX25/35/51) through serial port and the init file for our
i.MX35 design (mDDR based).
The cfg file syntax is quite simple :
1st line :
file name_of_the_bin_file_to_load load RAM_ADDRESS_TO LOAD exec
ADDRESS_TO_JUMP_FOR_EXECUTION
then, the syntax of the register access is the one of the configuration files
of the peedi JTAG adapter we are using here :
http://download.ronetix.info/peedi/cfg_examples/ (so you can find init for DDR2)
With this tool you can easily initalize the CPU registers and test your ram
(take care when you touch to PLL or clocks as this can break the bootrom
execution or the serial line).
A future evolution will be a sort of shell to be able to read/write registers
in live from the command line.
Feel free to provide feedback.
Eric
file barebox-eukrea-cpuimx35.bin load 0x87f00000 exec 0x87f02000
memory write32 0x43f00040 0x00000000
memory write32 0x43f00044 0x00000000
memory write32 0x43f00048 0x00000000
memory write32 0x43f0004C 0x00000000
memory write32 0x43f00050 0x00000000
memory write32 0x43f00000 0x77777777
memory write32 0x43f00004 0x77777777
memory write32 0x53f00040 0x00000000
memory write32 0x53f00044 0x00000000
memory write32 0x53f00048 0x00000000
memory write32 0x53f0004C 0x00000000
memory write32 0x53f00050 0x00000000
memory write32 0x53f00000 0x77777777
memory write32 0x53f00004 0x77777777
memory write32 0x53F80000 0x003F4208
memory write32 0x53F8001C 0x000F2005
memory write32 0x53F80020 0x00031801
memory write32 0x53F80004 0x00821000
memory write32 0x53F80004 0x00821000
memory write32 0x43FAC368 0x00000002
memory write32 0x43FAC36C 0x00000002
memory write32 0x43FAC370 0x00000002
memory write32 0x43FAC374 0x00000002
memory write32 0x43FAC378 0x00000002
memory write32 0x43FAC37C 0x00000002
memory write32 0x43FAC380 0x00000002
memory write32 0x43FAC384 0x00000002
memory write32 0x43FAC388 0x00000002
memory write32 0x43FAC38C 0x00000002
memory write32 0x43FAC390 0x00000002
memory write32 0x43FAC394 0x00000002
memory write32 0x43FAC398 0x00000002
memory write32 0x43FAC39C 0x00000002
memory write32 0x43FAC3A0 0x00000002
memory write32 0x43FAC3A4 0x00000002
memory write32 0x43FAC3A8 0x00000002
memory write32 0x43FAC3AC 0x00000002
memory write32 0x43FAC3B0 0x00000002
memory write32 0x43FAC3B4 0x00000002
memory write32 0x43FAC3B8 0x00000002
memory write32 0x43FAC3BC 0x00000002
memory write32 0x43FAC3C0 0x00000002
memory write32 0x43FAC3C4 0x00000002
memory write32 0x43FAC3C8 0x00000002
memory write32 0x43FAC3CC 0x00000002
memory write32 0x43FAC3D0 0x00000002
memory write32 0x43FAC3D4 0x00000002
memory write32 0x43FAC3D8 0x00000002
memory write32 0x43FAC3DC 0x00000082
memory write32 0x43FAC3E0 0x00000082
memory write32 0x43FAC3E4 0x00000082
memory write32 0x43FAC3E8 0x00000082
memory write32 0x43FAC3EC 0x00000082
memory write32 0x43FAC3F0 0x00000082
memory write32 0x43FAC3F4 0x00000082
memory write32 0x43FAC3F8 0x00000082
memory write32 0x43FAC3FC 0x00000082
memory write32 0x43FAC400 0x00000082
memory write32 0x43FAC404 0x00000082
memory write32 0x43FAC408 0x00000082
memory write32 0x43FAC40C 0x00000082
memory write32 0x43FAC410 0x00000082
memory write32 0x43FAC414 0x00000082
memory write32 0x43FAC418 0x00000082
memory write32 0x43FAC41c 0x00000082
memory write32 0x43FAC420 0x00000082
memory write32 0x43FAC424 0x00000082
memory write32 0x43FAC428 0x00000082
memory write32 0x43FAC42c 0x00000082
memory write32 0x43FAC430 0x00000082
memory write32 0x43FAC434 0x00000082
memory write32 0x43FAC438 0x00000082
memory write32 0x43FAC43c 0x00000082
memory write32 0x43FAC440 0x00000082
memory write32 0x43FAC444 0x00000082
memory write32 0x43FAC448 0x00000082
memory write32 0x43FAC44c 0x00000082
memory write32 0x43FAC450 0x00000082
memory write32 0x43FAC454 0x00000082
memory write32 0x43FAC458 0x00000082
memory write32 0x43FAC45c 0x00000082
memory write32 0x43FAC460 0x00000082
memory write32 0x43FAC464 0x00000082
memory write32 0x43FAC468 0x00000082
memory write32 0x43FAC46c 0x00000002
memory write32 0x43FAC470 0x00000002
memory write32 0x43FAC474 0x00000002
memory write32 0x43FAC478 0x00000002
memory write32 0x43FAC47c 0x00000002
memory write32 0x43FAC480 0x00000002 ; CSD0
memory write32 0x43FAC484 0x00000002 ; CSD1
memory write32 0x43FAC488 0x00000002
memory write32 0x43FAC48c 0x00000002
memory write32 0x43FAC490 0x00000002
memory write32 0x43FAC494 0x00000002
memory write32 0x43FAC498 0x00000002
memory write32 0x43FAC49c 0x00000002
memory write32 0x43FAC4A0 0x00000002
memory write32 0x43FAC4A4 0x00000002
memory write32 0x43FAC4A8 0x00000002
memory write32 0x43FAC4Ac 0x00000002
memory write32 0x43FAC4B0 0x00000002
memory write32 0x43FAC4B4 0x00000002
memory write32 0x43FAC4B8 0x00000002
memory write32 0x43FAC4Bc 0x00000082
memory write32 0x43FAC4C0 0x00000082
memory write32 0x43FAC4C4 0x00000082
memory write32 0x43FAC4C8 0x00000082
memory write32 0xB8001010 0x00000004
memory write32 0xB8001010 0x0000000C
memory write32 0xB8001010 0x00000004
wait 10
memory write32 0xB8001010 0x0000000C
wait 10
memory write32 0xB8001004 0x0009572B
memory write32 0xB8001000 0x92220000
memory write8 0x80000400 0xda
memory write32 0xB8001000 0xA2220000
memory write32 0x80000000 0x87654321
memory write32 0x80000000 0x87654321
memory write32 0xB8001000 0xB2220000
memory write8 0x80000033 0xda
memory write8 0x82000000 0xda
memory write32 0xB8001000 0x82224080
memory write32 0xB8001010 0x00000004
memory write32 0x53F80028 0x7D000028
/*
* Copyright
* (c) 2010 Eukrea Electromatique, Eric Bénard <eric@xxxxxxxxxx>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; version 2 of
* the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
* v0.1 - 11-03-09 - initial release to barebox users
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>
#include <string.h>
#include <pthread.h>
#include <errno.h>
#include <sys/stat.h>
#include <arpa/inet.h>
#define BLACK 0
#define RED 1
#define GREEN 2
#define BROWN 3
#define BLUE 4
#define MAGENTA 5
#define CYAN 6
#define GRAY 7
#define BLACK2 8
#define WHITE 9
#define FG_COLOR BLACK
#define BG_COLOR WHITE
#define LOG_DEBUG 1
#define LOG_INFO 1
#define LOG_DATA 1
#define LOG_ERROR 1
#define LOG_CMD 1
#define setcolor(fg,bg) printf("\033[%d;%dm", fg +30, bg+40)
#ifdef LOG_DEBUG
#define DBG(fmt...) \
do{ setcolor(RED,BLACK); \
printf(fmt); \
setcolor(FG_COLOR,BG_COLOR); \
fflush(stdout); \
} while(0)
#else
#define DBG(fmt...) while (0) {};
#endif
#ifdef LOG_INFO
#define INFO(fmt...) \
do{ setcolor(GREEN,BLACK); \
printf(fmt); \
setcolor(FG_COLOR,BG_COLOR); \
fflush(stdout); \
} while(0)
#else
#define INFO(fmt...) while (0) {};
#endif
#ifdef LOG_ERROR
#define ERROR(fmt...) \
do{ setcolor(BLACK,RED); \
printf(fmt); \
setcolor(FG_COLOR,BG_COLOR); \
fflush(stdout); \
} while(0)
#else
#define ERROR(fmt...) while (0) {};
#endif
#ifdef LOG_DATA
#define DATA(fmt...) \
do{ setcolor(MAGENTA,BLACK); \
printf(fmt); \
setcolor(FG_COLOR,BG_COLOR); \
fflush(stdout); \
} while(0)
#else
#define DATA(fmt...) while (0) {};
#endif
#ifdef LOG_CMD
#define CMD(a) \
do{ int tmp; \
setcolor(BLUE,BLACK); \
for (tmp = 0; tmp < sizeof(a); tmp++) \
printf("%02x ", *(unsigned char *)((void *)& a +tmp)); \
printf("\n"); \
setcolor(FG_COLOR,BG_COLOR); \
fflush(stdout); \
} while(0)
#else
#define CMD(fmt) while (0) {};
#endif
#define DEFAULT_SPEED B115200
struct termios sauvegarde;
#define B 0x08
#define HW 0x10
#define W 0x20
#define TIMEOUT 5
int init_UART(char * port, int speed) {
struct termios configuration;
int fd;
if (! port) {
DBG("\n%s: error, no port!", __FUNCTION__);
return -1;
}
if ((fd = open(port, O_RDWR | O_NOCTTY | O_NDELAY )) < 0) {
DBG("error %i - %s\n", errno, strerror(errno));
return -1;
};
fcntl(fd, F_SETFL, 0);
INFO("UART opened on %s ....\n", port);
tcgetattr(fd, &configuration);
INFO("serial open - speed : %08x\n", speed);
tcgetattr(fd, &configuration);
bzero(&configuration, sizeof(configuration));
cfsetispeed(&configuration, speed);
cfsetospeed(&configuration, speed);
configuration.c_cflag |= (CLOCAL | CREAD);
configuration.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
configuration.c_oflag &= ~OPOST;
configuration.c_cc[VMIN] = 0;
configuration.c_cc[VTIME] = 1;
configuration.c_cflag &= ~(CSIZE | PARENB | CSTOPB);
configuration.c_cflag |= CS8;
configuration.c_cflag &= ~CRTSCTS;
configuration.c_iflag &= ~(IXON | IXOFF | IXANY);
if (tcsetattr(fd, TCSANOW, &configuration) < 0) {
DBG("error %i - %s\n", errno, strerror(errno));
return -1;
}
INFO("%s:Serial port configured.\n", __FUNCTION__);
return fd;
}
struct command_t {
unsigned short cmd;
unsigned int a;
unsigned char ds;
unsigned int c;
unsigned int d;
unsigned char ft;
} __attribute__((__packed__));
int close_UART(int fd) {
if (tcsetattr(fd, TCSANOW, &sauvegarde) < 0) {
DBG("error %i - %s\n", errno, strerror(errno));
return -1;
}
close(fd);
return 0;
}
int get_sync(int fd) {
struct command_t getstatus;
unsigned int tmp;
memset(&getstatus, 0, sizeof(getstatus));
getstatus.cmd = 0x0505;
CMD(getstatus);
tmp = write(fd, &getstatus, sizeof(getstatus));
if (tmp != sizeof(getstatus)) {
DBG("error %i - %s\n", errno, strerror(errno));
return -1;
}
return 0;;
}
int get_status(int fd) {
struct command_t getstatus;
unsigned char answer[4];
unsigned int tmp;
int timeout = 0;
memset(&getstatus, 0, sizeof(getstatus));
getstatus.cmd = 0x0505;
CMD(getstatus);
tmp = write(fd, &getstatus, sizeof(getstatus));
if (tmp != sizeof(getstatus)) {
DBG("error %i - %s\n", errno, strerror(errno));
return -1;
}
tmp = 0;
while (tmp < 4) {
tmp += read(fd, answer + tmp, 1);
if (timeout++ > TIMEOUT)
return -1;
}
if (tmp != 4)
DBG("error didn't receive 4 bytes\n");
DATA("Status : %x %x %x %x\n", answer[0], answer[1], answer[2], answer[3]);
return answer[0];
}
int write_memory(int fd, unsigned int a, unsigned char ds, unsigned int d) {
struct command_t writemem;
unsigned int answer;
int tmp;
int timeout = 0;
tcflush(fd, TCIOFLUSH);
memset(&writemem, 0, sizeof(writemem));
writemem.cmd = 0x0202;
writemem.a = htonl(a);
writemem.ds = ds;
writemem.d = htonl(d);
CMD(writemem);
tmp = write(fd, &writemem, sizeof(writemem));
if (tmp != sizeof(writemem)) {
DBG("error %i - %s\n", errno, strerror(errno));
return -1;
}
tmp = 0;
while (tmp < 4) {
tmp += read(fd, (unsigned char *) &answer + tmp, 1);
if (timeout++ > TIMEOUT)
return -1;
}
if (tmp != 4)
DBG("error didn't receive 4 bytes but : %i\n", tmp);
if (answer != 0x56787856) {
ERROR("bad answer : 0x%08x\n", answer);
return -1;
}
DATA("Answer : %08x\n", answer);
tmp = 0;
timeout = 0;
while (tmp < 4) {
tmp += read(fd, (unsigned char *) &answer + tmp, 1);
if (timeout++ > TIMEOUT)
return -1;
}
if (tmp != 4)
DBG("error didn't receive 4 bytes but : %i\n", tmp);
if (answer != 0x128a8a12) {
ERROR("bad answer : 0x%08x\n", answer);
return -1;
}
DATA("Answer : %08x\n", answer);
return answer;
}
int read_memory(int fd, unsigned int a, unsigned int ds, unsigned int c, void * data) {
struct command_t writemem;
unsigned int answer;
int tmp;
int timeout = 0;
memset(&writemem, 0, sizeof(writemem));
writemem.cmd = 0x0101;
writemem.a = htonl(a);
writemem.ds = ds;
writemem.c = htonl(c);
CMD(writemem);
tmp = write(fd, &writemem, sizeof(writemem));
if (tmp != sizeof(writemem)) {
DBG("error %i - %s\n", errno, strerror(errno));
free(data);
return -1;
}
tmp = 0;
while (tmp < 4) {
tmp += read(fd, (unsigned char *) &answer + tmp, 1);
if (timeout++ > TIMEOUT)
return -1;
}
if (tmp != 4)
DBG("error didn't receive 4 bytes but : %i\n", tmp);
if (answer != 0x56787856) {
ERROR("bad answer : 0x%08x\n", answer);
free(data);
return -1;
}
DATA("Answer : %08x\n", answer);
tmp = 0;
timeout = 0;
while (tmp < (c * (ds >> 3))) {
tmp += read(fd, data + tmp, 16);
if (timeout++ > TIMEOUT)
return -1;
}
if (tmp != c*(ds >> 3))
DBG("error didn't receive %i bytes\n", ds*c);
DATA("Read : ");
for (tmp = 0; tmp < c*(ds >>3); tmp+=(ds >> 3)) {
DATA("0x");
switch (ds) {
case B :
DATA("%02x", (* (unsigned int *) (data + tmp)));
break;
case HW :
DATA("%04x", (* (unsigned short *) (data + tmp)));
break;
case W :
DATA("%08x", (* (unsigned int *) (data + tmp)));
break;
default :
break;
}
DATA(" ");
}
DATA("\n");
return answer;
}
int read_reg32(int fd, unsigned int a) {
unsigned int reg;
read_memory(fd, a, W, 1, ®);
return reg;
}
int read_reg16(int fd, unsigned int a) {
unsigned short reg;
read_memory(fd, a, HW, 1, ®);
return reg;
}
int read_reg8(int fd, unsigned int a) {
unsigned char reg;
read_memory(fd, a, B, 1, ®);
return reg;
}
#define SET_REG32(reg, value) \
write_memory(fd, reg, W, value);
#define SET_REG16(reg, value) \
write_memory(fd, reg, HW, value);
#define SET_REG8(reg, value) \
write_memory(fd, reg, B, value);
#define GET_REG32(reg) \
read_reg32(fd, reg);
#define GET_REG16(reg) \
read_reg16(fd, reg);
#define GET_REG8(reg) \
read_reg8(fd, reg);
int write_file(int fd, unsigned int a, char * file) {
struct command_t writemem;
unsigned int answer;
int tmp;
struct stat status;
FILE * bin;
int size;
int timeout = 0;
tcflush(fd, TCIOFLUSH);
if (stat(file, &status) < 0) {
ERROR("file : %s - %i %s\n", file, errno, strerror(errno));
return -1;
}
size = status.st_size;
INFO("file size : %i\n", size);
bin = fopen(file, "rb");
memset(&writemem, 0, sizeof(writemem));
writemem.cmd = 0x0404;
writemem.a = htonl(a);
writemem.c = htonl(size);
writemem.ft = 0xAA;
CMD(writemem);
tcflush(fd, TCIOFLUSH);
tmp = write(fd, &writemem, sizeof(writemem));
if (tmp != sizeof(writemem)) {
DBG("error %i - %s\n", errno, strerror(errno));
return -1;
}
tmp = 0;
while (tmp < 4) {
tmp += read(fd, (unsigned char *) &answer + tmp, 1);
if (timeout++ > TIMEOUT)
return -1;
}
if (tmp != 4)
DBG("error didn't receive 4 bytes but : %i\n", tmp);
if (answer != 0x56787856) {
ERROR("bad answer : 0x%08x\n", answer);
return -1;
}
DATA("Answer : %08x\n", answer);
tcflush(fd, TCIOFLUSH);
tmp = 0;
while (tmp < size) {
char data;
tmp += fread(&data, sizeof(char), 1, bin);
if (write(fd, &data, 1) != 1)
printf("Error writing file !\n");
}
INFO("file %s uploaded to 0x%08x\n", file, a);
fclose(bin);
return answer;
}
int exec_file(int fd, unsigned int a) {
struct command_t writemem;
unsigned int answer;
int tmp;
memset(&writemem, 0, sizeof(writemem));
writemem.cmd = 0x0404;
writemem.a = htonl(a);
writemem.ds = 0;
writemem.c = 4;
writemem.d = htonl(a);
writemem.ft = 0xAA;
CMD(writemem);
tmp = write(fd, &writemem, sizeof(writemem));
if (tmp != sizeof(writemem)) {
DBG("error %i - %s\n", errno, strerror(errno));
return -1;
}
tmp = 0;
while (tmp < 4) {
tmp += read(fd, (unsigned char *) &answer + tmp, 1);
}
if (tmp != 4)
DBG("error didn't receive 4 bytes but : %i\n", tmp);
if (answer != 0x56787856) {
ERROR("bad answer : 0x%08x\n", answer);
return -1;
}
DATA("Answer : %08x\n", answer);
return answer;
}
int main(int argc, char *argv[]) {
int fd;
unsigned int tmp;
FILE * conf_file;
char * line = NULL;
size_t length = 0;
char binfile[256];
int load_adr;
int exec_adr;
struct stat status;
fd_set mux;
struct timeval timeout;
if (argc != 3) {
printf("Usage: %s uart_device config_file.cfg\n", argv[0]);
return 1;
}
conf_file = fopen(argv[2], "r");
if (conf_file == NULL) {
ERROR("Can't open file %s\n", argv[2]);
return 1;
}
fd = init_UART(argv[1], DEFAULT_SPEED);
if (fd < 0) {
fclose(conf_file);
return 1;
}
if (get_status(fd) < 0) {
fclose(conf_file);
close_UART(fd);
setcolor(FG_COLOR,BG_COLOR);
return 1;
};
if (getline(&line, &length, conf_file) != -1) {
if (sscanf(line, "file %s load 0x%x exec 0x%x", binfile, &load_adr, &exec_adr) != 3) {
DBG("sscan failed with line : %s\n", line);
ERROR("Bad config file format");
if (line)
free(line);
fclose(conf_file);
close_UART(fd);
setcolor(FG_COLOR,BG_COLOR);
return 1;
} else {
DBG("file : %s @ load : %x - exec : %x\n", binfile, load_adr, exec_adr);
if (stat(binfile, &status) < 0) {
ERROR("Can't open file %s\n", binfile);
if (line)
free(line);
fclose(conf_file);
close_UART(fd);
setcolor(FG_COLOR,BG_COLOR);
return -1;
}
}
if (line)
free(line);
line = NULL;
} else {
ERROR("Can't read data from config file\n");
fclose(conf_file);
close_UART(fd);
setcolor(FG_COLOR,BG_COLOR);
return 1;
}
while (getline(&line, &length, conf_file) != -1) {
char type[256];
char size[256];
int adr;
int val;
DBG("line : %s\n", line);
if (sscanf(line, "%s %s 0x%x %x", type, size, &adr, &val) != 4) {
DBG("sscan failed with line : %s\n", line);
} else {
int ret;
DBG("@ %x - %x - %s - %s\n", adr, val, size, type);
if ((strcmp("wr", size) == 0) | (strcmp("write32", size) == 0) | (strcmp("write", size) == 0)) {
ret = SET_REG32(adr, val);
} else if ((strcmp("wr16", size) == 0) | (strcmp("write16", size) == 0)) {
ret = SET_REG16(adr, val);
} else if ((strcmp("wr8", size) == 0) | (strcmp("write8", size) == 0)) {
ret = SET_REG8(adr, val);
}
if ((strcmp("rd", size) == 0) | (strcmp("read32", size) == 0) | (strcmp("read", size) == 0)) {
ret = GET_REG32(adr);
} else if ((strcmp("rd16", size) == 0) | (strcmp("read16", size) == 0)) {
ret = GET_REG16(adr);
} else if ((strcmp("rd8", size) == 0) | (strcmp("read8", size) == 0)) {
ret = GET_REG8(adr);
}
if (ret < 0) {
fclose(conf_file);
close_UART(fd);
setcolor(FG_COLOR,BG_COLOR);
return -1;
}
}
if (line)
free(line);
line = NULL;
length = 0;
}
if (line)
free(line);
if (write_file(fd, load_adr, binfile) < 0) {
fclose(conf_file);
close_UART(fd);
setcolor(FG_COLOR,BG_COLOR);
return -1;
}
/* the bootrom expects a "app_code_jump_vector" at the
* base address of the flash header so make him happy */
INFO("Now executing @ 0x%x08x\n", exec_adr);
tmp = SET_REG32(load_adr, exec_adr);
if (tmp < 0) {
fclose(conf_file);
close_UART(fd);
setcolor(FG_COLOR,BG_COLOR);
return -1;
}
get_sync(fd);
printf("%i %i\n", fd, fileno(stdin));
while (1) {
char out[256];
int tmp;
FD_ZERO(&mux);
FD_SET(fd, &mux);
FD_SET(0, &mux);
timeout.tv_sec = 0;
timeout.tv_usec = 1000;
if ((tmp = select(FD_SETSIZE, &mux, NULL, NULL, &timeout)) < 0) {
DBG("select error %i - %s\n", errno, strerror(errno));
}
if (FD_ISSET(fd, &mux)) {
memset(out, 0, 256);
tmp = read(fd, out, 256);
printf("%s", out);
fflush(stdout);
}
if (FD_ISSET(0, &mux)) {
int i = 0;
memset(out, 0, 256);
tmp = read(0, out, 256);
while (i < tmp)
i += write(fd, out + i, tmp -i);
}
}
close_UART(fd);
setcolor(FG_COLOR,BG_COLOR);
}
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