If, when setting up your HC-Joy serial joystick with your gen 2 cameras, you are having issues daisy chaining with RS please follow the following the steps. This cable is again optional and only needs to be used if a longer distance is needed between the joystick and camera. STEP 2: Make sure you have all the cables connected correctly. STEP 3: Make sure that all the settings on the joystick are correct. The example shows 2, but additional would be done the same way.
Embodiments of the present disclosure may include an apparatus, such as a master control unit, in a daisy chain of electronic devices. The apparatus may include a serial data output port configured to send output data to an electronic device of the daisy chain. The apparatus may include a serial data input port configured to receive input data from another electronic device of the daisy chain.
The apparatus may include a chip select output port configured to send output to the electronic devices connected in the daisy chain, including the electronic device and the other electronic device.
The apparatus may include an interface circuit configured to determine to set the plurality of electronic devices in a daisy chain mode. Each electronic device may be configured to propagate received data from a previous electronic device in the daisy chain to a subsequent electronic device in the daisy chain.
The interface circuit may be configured to, based on the determination to set the plurality of electronic devices into the daisy chain mode, issue a changed edge on a chip select signal on the chip select output port, wherein the changed edge of the chip select signal is from a first logic level to a second logic level. The interface circuit may be configured to, based on the determination to set the plurality of electronic devices into the daisy chain mode, send output data to be used in a command to the electronic device through the serial data output port.
Embodiments of the present disclosure may include a method. The method may be for a node in a daisy chain of electronic devices. The method may include receiving input from an electronic device through a serial data input port. The method may include sending output to another electronic device through a serial data output port. The method may include receiving input from a master control unit through a chip select input port.
The method may include, in a daisy chain mode, copying data received at the serial data input port to the serial data output port. The method may include, upon receipt of a first changed edge of a chip select signal on the chip select input port, initiating a timer, wherein the changed edge of the chip select signal is from a first logic level to a second logic level. The method may include, upon the completion of a time to be determined by the timer, entering the daisy chain mode.
The method may be for a master control unit in a daisy chain of electronic devices. The method may include, through a serial data output port, sending output data to an electronic device of the daisy chain.
The method may include, through a serial data input port, receiving input data from another electronic device in the daisy chain. The method may include, through a chip select output port, sending output to the electronic devices connected in a daisy chain.
The method may include determining to set the electronic devices in a daisy chain mode, wherein each electronic device is configured to propagate received data from a previous electronic device in the daisy chain to a subsequent electronic device in the daisy chain.
The method may include, based on the determination to set the electronic devices into the daisy chain mode, issuing a changed edge on a chip select signal on the chip select output port. The changed edge of the chip select signal is from a first logic level to a second logic level. The method may include, based on the determination to set the electronic devices into the daisy chain mode, sending output data to be used in a command to the electronic device through the serial data output port.
Embodiments of the present disclosure may include a system. The system may include electronic devices connected to one another in a daisy chain fashion. The electronic devices may include a master electronic device or master control unit and any suitable number of other electronic devices.
The electronic devices and master control units may be implemented in the same manner or in a different manner.
The electronic devices and master control units may each include interface circuits. The interface circuits may be implemented in any suitable combination of analog circuitry, digital circuitry, or instructions for execution by a processor. The interface circuits may handle communication between electronic devices and master control units.
A master control unit may be connected to each electronic device in any suitable manner. For example, the master control unit may be connected to each electronic device via a clock signal connection. The master control unit may be connected to each electronic device via a chip select signal connection. The master control unit may be connected to a first electronic device in the daisy chain through a serial data output port of the master control unit and a serial data input port of the first electronic device.
A given electronic device of the daisy chain may be connected to another electronic device of the daisy chain through a serial data output port of the given electronic device and a serial data input port of the other electronic device. The master control unit may be connected to a last electronic device in the daisy chain through a serial data input port in the master control unit and a serial data output port in the electronic device.
In combination with any of the above embodiments, an embodiment may include an apparatus, such as an electronic device in the daisy chain. The electronic device may include a serial data input port configured to receive input from a first, other electronic device or a master control unit. The electronic device may include a serial data output port configured to send output to a second, other electronic device.
The electronic device may include a chip select input port configured to receive input from an electronic device such as a master control unit. The electronic device may include a timer. The electronic device may include an interface circuit configured to, in a daisy chain mode, copy data received at the serial data input port to the serial data output port. The interface circuit may be configured to, upon receipt of a first changed edge of a chip select signal on the chip select input port, initiate the timer.
The first changed edge of the chip select signal may be from a first logic level to a second logic level. The interface circuit may be configured to, upon the completion of a time to be determined by the timer, enter the electronic device into daisy chain mode. In combination with any of the above embodiments, the interface circuit may be further configured to stop the timer and not enter the daisy chain mode upon a second changed edge of the chip select signal before the completion of time.
In combination with any of the above embodiments, the interface circuit may be further configured to stop the timer and not enter the daisy chain mode upon a changed clock input before the completion of time.
In combination with any of the above embodiments, the interface circuit may be further configured to exit the daisy chain mode based at least upon receipt of a second changed edge of the chip select signal on the chip select input port, wherein the second changed edge of the chip select signal is from the second logic level to the first logic level.
In combination with any of the above embodiments, the timer may be configured to be stopped based at least upon receipt of a second changed edge of the chip select signal on the chip select input port, wherein the second changed edge of the chip select signal is from the second logic level to the first logic level.
In combination with any of the above embodiments, the interface circuit may be further configured to output a default value to the serial data output port after receipt of the first changed edge of the chip select signal on the chip select input port and before the timer has determined the time to be determined.
In combination with any of the above embodiments, the electronic device may further include a shared clock input port configured to receive a shared clock signal. The interface circuit may be further configured to enter the daisy chain mode based on a determination that the shared clock signal is unchanged while the timer is enabled and running.
In combination with any of the above embodiments, the interface circuit may be further configured to exit the daisy chain mode and enter a normal mode upon receipt of a second changed edge of the chip select signal on the chip select input port, wherein the second changed edge of the chip select signal is from the second logic level to the first logic level. In combination with any of the above embodiments, the interface circuit may be further configured to, in the normal mode after existing the daisy chain mode, apply a high impedance to the serial data output port.
In combination with any of the above embodiments, the master control unit may be configured to issue commands and data associated with the commands to the electronic devices. When in daisy chain mode, electronic devices may generally propagate information received on their serial data input port to their serial data output port.
The master control unit may include a serial data output port configured to send output data to a first electronic device at the top of the daisy chain, a serial data input port configured to receive input data from a second electronic device at the end of the daisy chain, and a chip select output port configured to send output to the electronic devices, and an interface circuit.
The interface circuit may be configured to determine to set the plurality of electronic devices in a daisy chain mode, wherein each electronic device is configured to propagate received data from a previous electronic device in the daisy chain to a subsequent electronic device in the daisy chain. The interface circuit may be configured to, based on the determination to set the electronic devices in the daisy chain to daisy chain mode, issue a first changed edge on a chip select signal on the chip select output port.
The interface circuit may be configured to, based on the determination to set the plurality of electronic devices into the daisy chain mode, send output data to be used in a command to the first electronic device through the serial data output port. In combination with any of the above embodiments, the interface circuit may be configured to determine whether the input data received from the second electronic device through the serial data input port matches an expected data.
The expected data may be based on the output data, The interface circuit may be configured to, based on a determination that the input data matches the expected data, determine that the daisy chain is working correctly. Otherwise, the interface circuit may be configured to determine that the daisy chain is working incorrectly and to take any suitable corrective action. In combination with any of the above embodiments, the interface circuit may be configured to, based on the determination that the daisy chain is working incorrectly, issue a second changed edge on the chip select signal on the chip select output port.
The second changed edge of the chip select signal may be from the second logic level to first logic level. In combination with any of the above embodiments, the interface circuit may be configured to, after issuing the second changed edge, issue a third changed edge on the chip select signal on the chip select output port.
The third changed edge of the chip select signal may be from the first logic level to second logic level. In combination with any of the above embodiments, the interface circuit may be configured to, after issuing the third changed edge, resend the output data to be used in the command to the first electronic device through the serial data output port. In combination with any of the above embodiments, the apparatus may include a timer. In combination with any of the above embodiments, the interface circuit may be configured to, based on the determination to set the electronic devices into the daisy chain mode, initiate the timer.
In combination with any of the above embodiments, the interface circuit may be configured to, when the timer elapses, perform the determination of whether the input data received from the second electronic device through the serial data input port matches the expected data. In combination with any of the above embodiments, the interface circuit may be configured to determine to set the electronic devices into a normal mode and cause the electronic devices to exit the daisy chain mode.
In combination with any of the above embodiments, the interface circuit may be configured to, based on the determination to set the electronic devices into the normal mode and exit the daisy chain mode, issue a second changed edge on the chip select signal on the chip select output port, wherein the second changed edge of the chip select signal is from the second level to the first logic level. In combination with any of the above embodiments, the interface circuit may be configured to output a default value, such as zero, to the serial data output port after receipt of the first changed edge of the chip select signal on the chip select input port and before the timer has elapsed.
Any suitable electronic devices may be daisy chained. For example, a microcontroller unit MCU may be a master or head node in system In another example, additional electronic devices A, B, C may be slave or sub nodes in system Any suitable number and type of electronic devices may be used.
For example, in some implementations, different electronic devices may be daisy chained in system The electronic devices of system , such as MCU and electronic devices , may be implemented in a same manner or each in a different manner. System may be implemented within any suitable context.
For example, system may be implemented within a data sensor array, vehicle, control system, industrial automation, home automation, factory, test and validation system, or any other suitable application. System may be configured to read or write data via daisy chained serial interfaces in order to accomplish or further any suitable task in such contexts. MCU may include inputs and outputs, including master in slave output MISO , configured to receive data from an end of the daisy chain of system , such as output of electronic device C.
The MISO port may be a serial data input port configured to receive input from other electronic devices. The MOSI port may be a serial data output port configured to send output to other electronic devices. For example, MCU which may be configured to send data to a first slave electronic device of the daisy chain of system , such as input to electronic device A, through the MO SI port.
MCU may include a port or pin s for a shared clock SCK , which may be used as a shared clock output port to send a shared clock signal for timing of transfers. MCU may be configured to generate SCK, and it may be routed to each of the other electronic devices MCU may include a port or pin s for a chip select CS signal, which may be used to communicate various information as discussed below.
The CS port may be a chip select output port configured to send input from a master device such as MCU to electronic devices MCU may be configured to generate the CS signal, and it may be routed to each of the other electronic devices The CS signal may be manifested or evaluated in terms of an inverted or logical negative version of the CS signal, denoted as nCS.
Electronic devices may each include a serial data input SDI port or pin s configured to receive data input from MCU or another one of electronic devices The SDI port may be a serial data input port configured to receive input from other electronic devices. In this configuration, all the slave units need to have their SS pins set to the active mode since they all receive the same data. Raspberry Pi Projects Donate. Author: Peter J. Of the devices connected on a bus, devices that receive data are called "listeners," while devices that send data are called "talkers.
The device that manages the whole system is called the "controller", which is normally a computer PC. As the name suggests, the master is the device that has the power to make decisions regarding GPIB communication command transmission, etc.
When configuring a system there must be one master and at least one slave. When controlling a measuring instrument, the PC acting as the controller is the master. Each device connected to a GPIB system has a unique address within the system that is used to identify it. A user-assigned address is called "my address.
Device addresses for the same system can be set freely from 0 to 30, but must not overlap with other addresses. A handshake is a communication method wherein a signal is sent from the sender to the receiver saying, "I'm sending data. By repeating this process, the sender and receiver transfer data while checking that it is being sent and received. Handshake communication allows GPIB to achieve highly reliable data transmission. To prevent data from colliding, the number of devices on a GPIB bus line that can send data at any point in time is restricted to one.
The device that achieves this is the controller. The controller mainly performs the operations below. GPIB signal lines are comprised of eight data lines, three handshake lines, and five management lines. Connector pin assignments are standardized as shown in the pinout below.
It is especially important to understand the role of the management bus lines that are required when putting together a GPIB program. GPIB connector pinout. Management bus lines are used to efficiently control each device connected to the bus line, and manage the flow of information. They play an important role in controlling GPIB devices.
Signal lines other than data lines all consist of a ground line and a twisted pair.
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