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authorRomain Forlot <romain.forlot@iot.bzh>2017-02-16 16:08:49 +0000
committerRomain Forlot <romain.forlot@iot.bzh>2017-02-16 16:08:49 +0000
commit109ba77a295811c5037c2c4dfc618c3f7e047228 (patch)
treef5095c745294623aeeab181e8e00707406b4f737 /src/can-utils.cpp
parent94073a891ccf610fcc8be64676ad474989986c40 (diff)
Adding canbus read method
Change-Id: I438d885516e9cbe499d333ff3065c5e9d6d4d99a Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>
Diffstat (limited to 'src/can-utils.cpp')
-rw-r--r--src/can-utils.cpp81
1 files changed, 64 insertions, 17 deletions
diff --git a/src/can-utils.cpp b/src/can-utils.cpp
index 16e18b4b..7dfe2286 100644
--- a/src/can-utils.cpp
+++ b/src/can-utils.cpp
@@ -23,25 +23,25 @@
*
*********************************************************************************/
-CanBus_c::CanBus_c(afb_binding_interface *itf, const std:string& dev_name)
+CanBus_t::CanBus_t(afb_binding_interface *itf, const std:string& dev_name)
: interface{itf}, deviceName{dev_name}
{
}
-int CanBus_c::open()
+int CanBus_t::open()
{
const int canfd_on = 1;
struct ifreq ifr;
struct timeval timeout = {1, 0};
- DEBUG(interface, "open_can_dev: CAN Handler socket : %d", socket);
+ DEBUG(interface_, "open_can_dev: CAN Handler socket : %d", can_socket_);
if (can_socket_ >= 0)
return 0;
can_socket_ = ::socket(PF_CAN, SOCK_RAW, CAN_RAW);
if (socket < 0)
{
- ERROR(interface, "open_can_dev: socket could not be created");
+ ERROR(interface_, "open_can_dev: socket could not be created");
}
else
{
@@ -50,25 +50,25 @@ int CanBus_c::open()
/* try to switch the socket into CAN_FD mode */
if (::setsockopt(can_socket_, SOL_CAN_RAW, CAN_RAW_FD_FRAMES, &canfd_on, sizeof(canfd_on)) < 0)
{
- NOTICE(interface, "open_can_dev: Can not switch into CAN Extended frame format.");
- is_fdmode_on = false;
+ NOTICE(interface_, "open_can_dev: Can not switch into CAN Extended frame format.");
+ is_fdmode_on_ = false;
} else {
- is_fdmode_on = true;
+ is_fdmode_on_ = true;
}
/* Attempts to open a socket to CAN bus */
::strcpy(ifr.ifr_name, device);
if(ioctl(can_socket_, SIOCGIFINDEX, &ifr) < 0)
- ERROR(interface, "open_can_dev: ioctl failed");
+ ERROR(interface_, "open_can_dev: ioctl failed");
else
{
txAddress.can_family = AF_CAN;
txAddress.can_ifindex = ifr.ifr_ifindex;
/* And bind it to txAddress */
- if (::bind(can_socket_, (struct sockaddr *)&txAddress, sizeof(txAddress)) < 0)
+ if (::bind(can_socket_, (struct sockaddr *)&txAddress_, sizeof(txAddress_)) < 0)
{
- ERROR(interface, "open_can_dev: bind failed");
+ ERROR(interface_, "open_can_dev: bind failed");
}
else
{
@@ -81,23 +81,70 @@ int CanBus_c::open()
return -1;
}
-int CanBus_c::close()
+int CanBus_t::close()
{
::close(can_socket_);
can_socket_ = -1;
}
-void CanBus_c::start_threads()
+
+canfd_frame CanBus_t::can_read()
+{
+ ssize_t nbytes;
+ int maxdlen;
+ canfd_frame canfd_frame;
+
+ /* Test that socket is really opened */
+ if (can_socket_ < 0)
+ {
+ ERROR(interface_, "read_can: Socket unavailable. Closing thread.");
+ is_running_ = false;
+ }
+
+ nbytes = ::read(can_socket_, &canfd_frame, CANFD_MTU);
+
+ switch(nbytes)
+ {
+ case CANFD_MTU:
+ DEBUG(interface_, "read_can: Got an CAN FD frame with length %d", canfd_frame.len);
+ maxdlen = CANFD_MAX_DLEN;
+ break;
+ case CAN_MTU:
+ DEBUG(interface_, "read_can: Got a legacy CAN frame with length %d", canfd_frame.len);
+ maxdlen = CAN_MAX_DLEN;
+ break;
+ default:
+ if (errno == ENETDOWN)
+ ERROR(interface_, "read_can: %s interface down", device);
+ ERROR(interface_, "read_can: Error reading CAN bus");
+ ::memset(&canfd_frame, 0, sizeof(canfd_frame));
+ break;
+ }
+
+ return canfd_frame;
+}
+
+void CanBus_t::start_threads()
{
th_reading_ = std::thread(can_reader, interface, socket, can_message_q_);
+ is_running_ = true;
+
th_decoding_ = std::thread(can_decoder, interface, can_message_q, can_message_q_);
th_pushing_ = std::thread(can_event_push, interface, can_message_q_);
}
/*
+ * Return is_running_ bool
+ */
+bool CanBus_t::is_running()
+{
+ return is_running_;
+}
+
+/*
* Send a can message from a CanMessage_c object.
*/
-int CanBus_c::send_can_message(CanMessage_c can_msg)
+int CanBus_t::send_can_message(CanMessage_c &can_msg)
{
int nbytes;
canfd_frame *f;
@@ -130,7 +177,7 @@ int CanBus_c::send_can_message(CanMessage_c can_msg)
*
* Return the next queue element or NULL if queue is empty.
*/
-CanMessage_c* CanBus_c::next_can_message()
+CanMessage_c* CanBus_t::next_can_message()
{
if(! can_message_q_.empty())
{
@@ -142,7 +189,7 @@ CanMessage_c* CanBus_c::next_can_message()
return nullptr;
}
-void CanBus_c::insert_new_can_message(CanMessage_c *can_msg)
+void CanBus_t::insert_new_can_message(CanMessage_c &can_msg)
{
can_message_q_.push(can_msg);
}
@@ -153,7 +200,7 @@ void CanBus_c::insert_new_can_message(CanMessage_c *can_msg)
*
* Return the next queue element or NULL if queue is empty.
*/
-openxc_VehicleMessage* CanBus_c::next_vehicle_message()
+openxc_VehicleMessage* CanBus_t::next_vehicle_message()
{
if(! vehicle_message_q_.empty())
{
@@ -165,7 +212,7 @@ openxc_VehicleMessage* CanBus_c::next_vehicle_message()
return nullptr;
}
-void CanBus_c::insert_new_vehicle_message(openxc_VehicleMessage *v_msg)
+void CanBus_t::insert_new_vehicle_message(openxc_VehicleMessage *v_msg)
{
vehicle_message_q_.push(v_msg);
}