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added serial support for D0 protocol (thanks to Kai Krüger, ITWM!)

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This commit is contained in:
Steffen Vogel 2012-02-10 10:10:00 +01:00
parent a0c17f2ead
commit 7a60100944
2 changed files with 37 additions and 2 deletions
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2
include/protocols/d0.h
View file

@ -61,4 +61,6 @@ size_t meter_read_d0(struct meter *mtr, struct reading *rds, size_t n);
*/
int meter_d0_open_socket(const char *node, const char *service);
int meter_d0_open_device(const char *device, struct termios *old_tio, speed_t baudrate);
#endif /* _D0_H_ */

37
src/protocols/d0.c
View file

@ -36,6 +36,7 @@
#include <errno.h>
#include <ctype.h>
#include <sys/time.h>
#include <sys/ioctl.h>
/* socket */
#include <netdb.h>
@ -114,8 +115,7 @@ int meter_open_d0(meter_t *mtr) {
meter_handle_d0_t *handle = &mtr->handle.d0;
if (handle->device != NULL) {
print(log_error, "TODO: implement serial interface", mtr);
return ERR;
handle->fd = meter_d0_open_device(handle->device, &handle->oldtio, handle->baudrate);
}
else if (handle->host != NULL) {
char *addr = strdup(handle->host);
@ -304,3 +304,36 @@ int meter_d0_open_socket(const char *node, const char *service) {
return fd;
}
int meter_d0_open_device(const char *device, struct termios *old_tio, speed_t baudrate) {
int bits;
struct termios tio;
memset(&tio, 0, sizeof(struct termios));
int fd = open(device, O_RDWR);
if (fd < 0) {
print(log_error, "open(%s): %s", NULL, device, strerror(errno));
return ERR;
}
/* get old configuration */
tcgetattr(fd, &tio) ;
/* backup old configuration to restore it when closing the meter connection */
memcpy(old_tio, &tio, sizeof(struct termios));
/* set 7-N-1 */
tio.c_iflag &= ~(BRKINT | INLCR | IMAXBEL);
tio.c_oflag &= ~(OPOST | ONLCR);
tio.c_lflag &= ~(ISIG | ICANON | IEXTEN | ECHO);
tio.c_cflag |= (CS7 | PARENB);
/* set baudrate */
cfsetispeed(&tio, baudrate);
cfsetospeed(&tio, baudrate);
/* apply new configuration */
tcsetattr(fd, TCSANOW, &tio);
return fd;
}