modbus_t* modbus_new_rtu(const char *device,
int baud, char parity, int data_bit,
int stop_bit)
{
modbus_t *ctx;
modbus_rtu_t *ctx_rtu;
/* Check device argument */
if (device == NULL || *device == 0) {
fprintf(stderr, "The device string is empty\n");
errno = EINVAL;
return NULL;
}
/* Check baud argument */
if (baud == 0) {
fprintf(stderr, "The baud rate value must not be zero\n");
errno = EINVAL;
return NULL;
}
ctx = (modbus_t *)malloc(sizeof(modbus_t));
_modbus_init_common(ctx);
ctx->backend = &_modbus_rtu_backend;
ctx->backend_data = (modbus_rtu_t *)malloc(sizeof(modbus_rtu_t));
ctx_rtu = (modbus_rtu_t *)ctx->backend_data;
ctx_rtu->device = NULL;
/* Device name and \0 */
ctx_rtu->device = (char *)malloc((strlen(device) + 1) * sizeof(char));
strcpy(ctx_rtu->device, device);
ctx_rtu->baud = baud;
if (parity == 'N' || parity == 'E' || parity == 'O') {
ctx_rtu->parity = parity;
} else {
modbus_free(ctx);
errno = EINVAL;
return NULL;
}
ctx_rtu->data_bit = data_bit;
ctx_rtu->stop_bit = stop_bit;
#if HAVE_DECL_TIOCSRS485
/* The RS232 mode has been set by default */
ctx_rtu->serial_mode = MODBUS_RTU_RS232;
#endif
#if HAVE_DECL_TIOCM_RTS
/* The RTS use has been set by default */
ctx_rtu->rts = MODBUS_RTU_RTS_NONE;
/* Calculate estimated time in micro second to send one byte */
ctx_rtu->onebyte_time = (1000 * 1000) * (1 + data_bit + (parity == 'N' ? 0 : 1) + stop_bit) / baud;
#endif
ctx_rtu->confirmation_to_ignore = FALSE;
return ctx;
}
modbus_t* modbus_new_rtu(const char *device,
int baud, char parity, int data_bit,
int stop_bit)
{
modbus_t *ctx;
modbus_rtu_t *ctx_rtu;
size_t dest_size;
size_t ret_size;
ctx = (modbus_t *) malloc(sizeof(modbus_t));
_modbus_init_common(ctx);
ctx->backend = &_modbus_rtu_backend;
ctx->backend_data = (modbus_rtu_t *) malloc(sizeof(modbus_rtu_t));
ctx_rtu = (modbus_rtu_t *)ctx->backend_data;
dest_size = sizeof(ctx_rtu->device);
ret_size = strlcpy(ctx_rtu->device, device, dest_size);
if (ret_size == 0) {
fprintf(stderr, "The device string is empty\n");
modbus_free(ctx);
errno = EINVAL;
return NULL;
}
if (ret_size >= dest_size) {
fprintf(stderr, "The device string has been truncated\n");
modbus_free(ctx);
errno = EINVAL;
return NULL;
}
ctx_rtu->baud = baud;
if (parity == 'N' || parity == 'E' || parity == 'O') {
ctx_rtu->parity = parity;
} else {
modbus_free(ctx);
errno = EINVAL;
return NULL;
}
ctx_rtu->data_bit = data_bit;
ctx_rtu->stop_bit = stop_bit;
#if HAVE_DECL_TIOCSRS485
/* The RS232 mode has been set by default */
ctx_rtu->serial_mode = MODBUS_RTU_RS232;
#endif
#if HAVE_DECL_TIOCM_RTS
/* The RTS use has been set by default */
ctx_rtu->rts = MODBUS_RTU_RTS_NONE;
#endif
ctx_rtu->confirmation_to_ignore = FALSE;
return ctx;
}
modbus_t* modbus_new_rtu(const char *device,
int baud, char parity, int data_bit,
int stop_bit)
{
modbus_t *ctx;
modbus_rtu_t *ctx_rtu;
size_t dest_size;
size_t ret_size;
ctx = (modbus_t *) malloc(sizeof(modbus_t));
_modbus_init_common(ctx);
ctx->backend = &_modbus_rtu_backend;
ctx->backend_data = (modbus_rtu_t *) malloc(sizeof(modbus_rtu_t));
ctx_rtu = (modbus_rtu_t *)ctx->backend_data;
dest_size = sizeof(ctx_rtu->device);
ret_size = strlcpy(ctx_rtu->device, device, dest_size);
printf("dest_size = %d\n", dest_size);
printf("device_size = %d\n", strlen(device));
if (ret_size == 0) {
fprintf(stderr, "The device string is empty\n");
modbus_free(ctx);
errno = EINVAL;
return NULL;
}
if (ret_size >= dest_size) {
fprintf(stderr, "The device string has been truncated\n");
modbus_free(ctx);
errno = EINVAL;
return NULL;
}
ctx_rtu->baud = baud;
if (parity == 'N' || parity == 'E' || parity == 'O') {
ctx_rtu->parity = parity;
} else {
modbus_free(ctx);
errno = EINVAL;
return NULL;
}
ctx_rtu->data_bit = data_bit;
ctx_rtu->stop_bit = stop_bit;
return ctx;
}
//***Not part of libmodbus - rts param added for QModMaster***//
modbus_t* modbus_new_rtu(const char *device,
int baud, char parity, int data_bit,
int stop_bit, int rts)
{
modbus_t *ctx;
modbus_rtu_t *ctx_rtu;
/* Check device argument */
if (device == NULL || *device == 0) {
fprintf(stderr, "The device string is empty\n");
errno = EINVAL;
return NULL;
}
/* Check baud argument */
if (baud == 0) {
fprintf(stderr, "The baud rate value must not be zero\n");
errno = EINVAL;
return NULL;
}
ctx = (modbus_t *)malloc(sizeof(modbus_t));
_modbus_init_common(ctx);
ctx->backend = &_modbus_rtu_backend;
ctx->backend_data = (modbus_rtu_t *)malloc(sizeof(modbus_rtu_t));
ctx_rtu = (modbus_rtu_t *)ctx->backend_data;
ctx_rtu->device = NULL;
/* Device name and \0 */
ctx_rtu->device = (char *)malloc((strlen(device) + 1) * sizeof(char));
strcpy(ctx_rtu->device, device);
ctx_rtu->baud = baud;
if (parity == 'N' || parity == 'E' || parity == 'O') {
ctx_rtu->parity = parity;
} else {
modbus_free(ctx);
errno = EINVAL;
return NULL;
}
ctx_rtu->data_bit = data_bit;
ctx_rtu->stop_bit = stop_bit;
#if HAVE_DECL_TIOCSRS485
/* The RS232 mode has been set by default */
ctx_rtu->serial_mode = MODBUS_RTU_RS232;
#endif
#if HAVE_DECL_TIOCM_RTS
/* The RTS use has been set by default */
ctx_rtu->rts = MODBUS_RTU_RTS_NONE;
/* Calculate estimated time in micro second to send one byte */
ctx_rtu->onebyte_time = 1000000 * (1 + data_bit + (parity == 'N' ? 0 : 1) + stop_bit) / baud;
/* The internal function is used by default to set RTS */
ctx_rtu->set_rts = _modbus_rtu_ioctl_rts;
/* The delay before and after transmission when toggling the RTS pin */
ctx_rtu->rts_delay = ctx_rtu->onebyte_time;
#endif
//***Not part of libmodbus - added for QModMaster***//
#if defined(_WIN32)
ctx_rtu->rts = rts;
#endif
ctx_rtu->confirmation_to_ignore = FALSE;
return ctx;
}
modbus_t* modbus_new_rtu(const char *device,
int baud, char parity, int data_bit,
int stop_bit)
{
modbus_t *ctx;
modbus_rtu_t *ctx_rtu;
/* Check device argument */
if (device == NULL || (*device) == 0) {
fprintf(stderr, "The device string is empty\n");
errno = EINVAL;
return NULL;
}
/* Check baud argument */
if (baud == 0) {
fprintf(stderr, "The baud rate value must not be zero\n");
errno = EINVAL;
return NULL;
}
/* Prepare GPIO on Raspberry Pi */
if (rpi_setup_gpio() == -1) {
fprintf(stderr, "GPIO ERROR: %s", rpi_gpio_error);
return NULL;
}
/* Configure GPIO17 (p1-11),and GPIO24 (p1-18) as OUT */
/*INP_GPIO(17);
OUT_GPIO(17);*/
INP_GPIO(24);
OUT_GPIO(24);
/* Configure GPIO pin 11 (GPIO17) as ALT function 3 (RTS) */
INP_GPIO(17);
SET_GPIO_ALT(17, 3);
ctx = (modbus_t *) malloc(sizeof(modbus_t));
_modbus_init_common(ctx);
ctx->backend = &_modbus_rtu_backend;
ctx->backend_data = (modbus_rtu_t *) malloc(sizeof(modbus_rtu_t));
ctx_rtu = (modbus_rtu_t *)ctx->backend_data;
ctx_rtu->device = NULL;
/* Device name and \0 */
ctx_rtu->device = (char *) malloc((strlen(device) + 1) * sizeof(char));
strcpy(ctx_rtu->device, device);
ctx_rtu->baud = baud;
if (parity == 'N' || parity == 'E' || parity == 'O') {
ctx_rtu->parity = parity;
} else {
modbus_free(ctx);
errno = EINVAL;
return NULL;
}
ctx_rtu->data_bit = data_bit;
ctx_rtu->stop_bit = stop_bit;
#if HAVE_DECL_TIOCSRS485
/* The RS232 mode has been set by default */
ctx_rtu->serial_mode = MODBUS_RTU_RS232;
#endif
#if HAVE_DECL_TIOCM_RTS
/* The RTS use has been set by default */
ctx_rtu->rts = MODBUS_RTU_RTS_NONE;
/* Calculate estimated time in micro second to send one byte */
ctx_rtu->onebyte_time = (1000 * 1000) * (1 + data_bit + (parity == 'N' ? 0 : 1) + stop_bit) / baud;
#endif
ctx_rtu->confirmation_to_ignore = FALSE;
return ctx;
}
