static int _serial_write(struct serial_device_t *serial,
const void *buf, size_t count,
int nonblocking, unsigned int timeout_ms)
{
if (!serial) {
log_error("serial_write: invalid serial port device.");
return -DEVICE_CONN_ERROR;
}
if (!serial->data) {
log_error("serial_write: cannot use unopened serial port %s.", serial->port);
return -DEVICE_CONN_ERROR;
}
int ret;
if (nonblocking) {
ret = sp_nonblocking_write(serial->data, buf, count);
} else {
ret = sp_blocking_write(serial->data, buf, count, timeout_ms);
}
char *error;
switch (ret) {
case SP_ERR_ARG:
log_error("serial_write: invalid serial port parameters.");
return -DEVICE_CONF_ERROR;
case SP_ERR_FAIL:
error = sp_last_error_message();
log_error("serial_write: write error (%d): %s.", sp_last_error_code(), error);
sp_free_error_message(error);
return -DEVICE_CONN_ERROR;
}
return ret;
}
/**
* Write a number of bytes to the specified serial port.
*
* @param serial Previously initialized serial port structure.
* @param buf Buffer containing the bytes to write.
* @param count Number of bytes to write.
*
* @return The number of bytes written, or a negative error code upon failure.
*/
SR_PRIV int serial_write(struct sr_serial_dev_inst *serial,
const void *buf, size_t count)
{
ssize_t ret;
char *error;
if (!serial) {
sr_dbg("Invalid serial port.");
return SR_ERR;
}
if (serial->fd == -1) {
sr_dbg("Cannot use unopened serial port %s (fd %d).",
serial->port, serial->fd);
return SR_ERR;
}
if (serial->nonblocking)
ret = sp_nonblocking_write(serial->data, buf, count);
else
ret = sp_blocking_write(serial->data, buf, count, 0);
switch (ret) {
case SP_ERR_ARG:
sr_err("Attempted serial port write with invalid arguments.");
return SR_ERR_ARG;
case SP_ERR_FAIL:
error = sp_last_error_message();
sr_err("Write error: %s.", error);
sp_free_error_message(error);
return SR_ERR;
}
sr_spew("Wrote %d/%d bytes (fd %d).", ret, count, serial->fd);
return ret;
}
static int _serial_write(struct sr_serial_dev_inst *serial,
const void *buf, size_t count, int nonblocking, unsigned int timeout_ms)
{
ssize_t ret;
char *error;
if (!serial) {
sr_dbg("Invalid serial port.");
return SR_ERR;
}
if (!serial->data) {
sr_dbg("Cannot use unopened serial port %s.", serial->port);
return SR_ERR;
}
if (nonblocking)
ret = sp_nonblocking_write(serial->data, buf, count);
else
ret = sp_blocking_write(serial->data, buf, count, timeout_ms);
switch (ret) {
case SP_ERR_ARG:
sr_err("Attempted serial port write with invalid arguments.");
return SR_ERR_ARG;
case SP_ERR_FAIL:
error = sp_last_error_message();
sr_err("Write error (%d): %s.", sp_last_error_code(), error);
sp_free_error_message(error);
return SR_ERR;
}
sr_spew("Wrote %zd/%zu bytes.", ret, count);
return ret;
}
int serial_send(struct sp_port *my_port, const void *command, size_t write_bytes_count, void *response) {
int ret, read_count=6;
if (DO_BLOCKING_READ_WRITE) {
unsigned int timeout = READ_WRITE_TIMEOUT_SEC*1000;
ret = sp_blocking_write(my_port, command, write_bytes_count, timeout);
if (ret <= 0) {
printf("Failed to write serial bytes.\n");
return 0;
}
ret = sp_blocking_read(my_port, response, (size_t)read_count, timeout);
} else {
int fd;
ret = sp_get_port_handle(my_port,&fd);
if (ret != SP_OK) {
printf("Failed to get port handle for nonblocking read/write.\n");
}
fd_set fds;
FD_ZERO(&fds);
FD_SET(fd,&fds);
struct timespec ts;
ts.tv_sec = READ_WRITE_TIMEOUT_SEC;
ret = pselect(fd+1, NULL, &fds, NULL, &ts, NULL);
if (ret < 0 && errno != EINTR) {
printf("Error in pselect for write.\n");
return 0;
} else if (ret == 0) {
printf("Timeout while waiting to write.\n");
return 0;
}
ret = sp_nonblocking_write(my_port, command, write_bytes_count);
FD_ZERO(&fds);
FD_SET(fd,&fds);
ts.tv_sec = READ_WRITE_TIMEOUT_SEC;
ret = pselect(fd+1, &fds, NULL, NULL, &ts, NULL);
if (ret < 0 && errno != EINTR) {
printf("Error in pselect for write.\n");
return 0;
} else if (ret == 0) {
printf("Timeout while waiting to write.\n");
return 0;
}
ret = sp_nonblocking_read(my_port, response, (size_t)read_count);
}
if (ret < read_count) {
printf("Successful write to serial, but failed on serial read.\n");
return 0;
} else {
return ret;
}
}
int Arduino_write(const void *buffer, size_t bufferSize)
{
if(!serialPort) return 0;
return sp_nonblocking_write(serialPort, buffer, bufferSize) == SP_OK;
}