PIC - MMC (MultiMediaCard) Flash Memory Extension - Linux Sources
Download tar.gz's at the PIC - MMC main page
ser.c
/* ser.c
(C) 2004 Captain http://www.captain.at
Sends 3 characters (ABC) via the serial port (/dev/ttyS0) and reads
them back if they are returned from the PIC.
Used for testing the PIC-MMC test-board
http://www.captain.at/electronics/
*/
#include <stdio.h> /* Standard input/output definitions */
#include <string.h> /* String function definitions */
#include <unistd.h> /* UNIX standard function definitions */
#include <fcntl.h> /* File control definitions */
#include <errno.h> /* Error number definitions */
#include <termios.h> /* POSIX terminal control definitions */
#include "captain/capser.h"
int fd;
int initport(int fd) {
struct termios options;
// Get the current options for the port...
tcgetattr(fd, &options);
// Set the baud rates to 19200...
cfsetispeed(&options, B9600);
cfsetospeed(&options, B9600);
// Enable the receiver and set local mode...
options.c_cflag |= (CLOCAL | CREAD);
options.c_cflag &= ~PARENB;
options.c_cflag &= ~CSTOPB;
options.c_cflag &= ~CSIZE;
options.c_cflag |= CS8;
// Set the new options for the port...
tcsetattr(fd, TCSANOW, &options);
return 1;
}
int main(int argc, char **argv) {
fd = open("/dev/ttyS0", O_RDWR | O_NOCTTY | O_NDELAY);
if (fd == -1) {
perror("open_port: Unable to open /dev/ttyS0 - ");
return 1;
} else {
fcntl(fd, F_SETFL, 0);
}
printf("baud=%d\n", getbaud(fd));
initport(fd);
printf("baud=%d\n", getbaud(fd));
char sCmd[254];
sCmd[0] = 0x41;
sCmd[1] = 0x42;
sCmd[2] = 0x43;
sCmd[3] = 0x00;
if (!writeport(fd, sCmd)) {
printf("write failed\n");
close(fd);
return 1;
}
printf("written:%s\n", sCmd);
usleep(500000);
char sResult[254];
fcntl(fd, F_SETFL, FNDELAY); // don't block serial read
if (!readport(fd,sResult)) {
printf("read failed\n");
close(fd);
return 1;
}
printf("readport=%s\n", sResult);
close(fd);
return 0;
}
Makefile for ser.c:
CFLAGS=-g -Wall
ser: captain/capser.c ser.c
gcc -g -c -Wall captain/capser.c -o capser.o
gcc -g -c -Wall ser.c -o ser.o
gcc ser.o capser.o -o ser
captain/capser.c for ser.c:
/* capser.c
(C) 2004 Captain http://www.captain.at
Helper functions for "ser"
Used for testing the PIC-MMC test-board
http://www.captain.at/electronics/
*/
#include <stdio.h> /* Standard input/output definitions */
#include <string.h> /* String function definitions */
#include <unistd.h> /* UNIX standard function definitions */
#include <fcntl.h> /* File control definitions */
#include <errno.h> /* Error number definitions */
#include <termios.h> /* POSIX terminal control definitions */
int writeport(int fd, char *chars) {
int len = strlen(chars);
chars[len] = 0x0d; // stick a <CR> after the command
chars[len+1] = 0x00; // terminate the string properly
int n = write(fd, chars, strlen(chars));
if (n < 0) {
fputs("write failed!\n", stderr);
return 0;
}
return 1;
}
int readport(int fd, char *result) {
int iIn = read(fd, result, 254);
int len = strlen(result);
result[len-1] = 0x00;
if (iIn < 0) {
if (errno == EAGAIN) {
printf("SERIAL EAGAIN ERROR\n");
return 0;
} else {
printf("SERIAL read error %d %s\n", errno, strerror(errno));
return 0;
}
}
return 1;
}
int getbaud(int fd) {
struct termios termAttr;
int inputSpeed = -1;
speed_t baudRate;
tcgetattr(fd, &termAttr);
/* Get the input speed. */
baudRate = cfgetispeed(&termAttr);
switch (baudRate) {
case B0: inputSpeed = 0; break;
case B50: inputSpeed = 50; break;
case B110: inputSpeed = 110; break;
case B134: inputSpeed = 134; break;
case B150: inputSpeed = 150; break;
case B200: inputSpeed = 200; break;
case B300: inputSpeed = 300; break;
case B600: inputSpeed = 600; break;
case B1200: inputSpeed = 1200; break;
case B1800: inputSpeed = 1800; break;
case B2400: inputSpeed = 2400; break;
case B4800: inputSpeed = 4800; break;
case B9600: inputSpeed = 9600; break;
case B19200: inputSpeed = 19200; break;
case B38400: inputSpeed = 38400; break;
}
return inputSpeed;
}
captain/capser.h for captain/capser.c:
int writeport(int fd, char *chars);
int readport(int fd, char *result);
int getbaud(int fd);
serterm.c
/* serterm.c V2
(C) 2004 Captain http://www.captain.at
Reads 512bytes from the serial port (/dev/ttyS0) and then exits
Used for testing the PIC-MMC test-board
http://www.captain.at/electronics/
*/
#include <stdio.h> /* Standard input/output definitions */
#include <string.h> /* String function definitions */
#include <unistd.h> /* UNIX standard function definitions */
#include <fcntl.h> /* File control definitions */
#include <errno.h> /* Error number definitions */
#include <termios.h> /* POSIX terminal control definitions */
int fd;
FILE* serport;
int initport(int fd) {
struct termios options;
// Get the current options for the port...
tcgetattr(fd, &options);
// Set the baud rates to 9600...
cfsetispeed(&options, B9600);
cfsetospeed(&options, B9600);
// Enable the receiver and set local mode...
options.c_cflag |= (CLOCAL | CREAD | CRTSCTS);
options.c_cflag &= ~PARENB;
options.c_cflag &= ~CSTOPB;
options.c_cflag &= ~CSIZE;
options.c_cflag |= CS8;
options.c_iflag = IGNPAR | ICRNL;
options.c_oflag = 0;
options.c_lflag = ICANON;
tcflush (fd, TCIFLUSH);
// Set the new options for the port...
tcsetattr(fd, TCSANOW, &options);
return 1;
}
int getbaud(int fd) {
struct termios termAttr;
int inputSpeed = -1;
speed_t baudRate;
tcgetattr(fd, &termAttr);
/* Get the input speed. */
baudRate = cfgetispeed(&termAttr);
switch (baudRate) {
case B0: inputSpeed = 0; break;
case B50: inputSpeed = 50; break;
case B110: inputSpeed = 110; break;
case B134: inputSpeed = 134; break;
case B150: inputSpeed = 150; break;
case B200: inputSpeed = 200; break;
case B300: inputSpeed = 300; break;
case B600: inputSpeed = 600; break;
case B1200: inputSpeed = 1200; break;
case B1800: inputSpeed = 1800; break;
case B2400: inputSpeed = 2400; break;
case B4800: inputSpeed = 4800; break;
case B9600: inputSpeed = 9600; break;
case B19200: inputSpeed = 19200; break;
case B38400: inputSpeed = 38400; break;
}
return inputSpeed;
}
int main(int argc, char **argv) {
fd_set rfds;
char sResult;
int end = 1;
int cnt = 0;
char line[1024];
int retval = 0;
if ((serport = fopen("/dev/ttyS1", "rb")) == 0) {
char *err;
perror(err);
fprintf(stderr, "error: %s\n", err );
exit(1);
}
fd = fileno (serport);
fcntl(fd, F_SETFL, 0);
printf("baud=%d\n", getbaud(fd));
initport(fd);
printf("baud=%d\n", getbaud(fd));
printf("listening...\n");
FD_ZERO (&rfds);
FD_SET (fd, &rfds);
while(end) {
FD_ZERO (&rfds);
FD_SET (fd, &rfds);
retval = select (fd + 1, &rfds, NULL, NULL, NULL);
if (retval) {
fgets (line, 1024, serport);
printf ("%s\n", line);
}
}
fclose(serport);
printf("\nexiting...\n");
return 0;
}
Makefile for serterm.c:
CFLAGS=-g -Wall
serterm:
gcc serterm.c -o serterm
Download tar.gz's at the PIC - MMC main page
Last-Modified: Thu, 02 Dec 2004 18:55:48 GMT
