TWI287708B - Data reading/writing method for bridge interface - Google Patents

Abstract

The present invention is to provide a bridge interface having advantages or the like of high compatibility and the easy conversion of a command flow. In this data reading/writing method for the bridge interface, by properly controlling a signal level and timing between a host and a device, the bridge interface can perform a perfect message handshake, and performs work at any transmission speed to easily convert the flow of the command of an arbitrary bus present in the front end.

Description

1287708, V. Description of the invention (1) [Technical field to which the invention pertains] * ϊ ϊ: relates to a bridging interface, in particular to a bridging interface method for reading and writing foot and shell materials. [Prior Art] In today's computer information products, various electronic devices are often used: two devices: personal electric, notebook, digital camera, printer and face: communication and signal transmission between these electronic devices It is necessary to follow the question and enter the "7", because of the transmission speed and compatibility of the bridge interface, it becomes an important consideration for the interface design. ^ For the digital transmission interface that bridges two electronic devices, the logic can be directly used as a general purpose, and the input/output (I/O) of the logic level used by the s Α Γ Γ Γ Γ 埠For parallel port (Parallel port) and serial port (for ^ 0) port). In the case of parallel operations, the operating system, such as the wi computer system: planning for the parallel position... for the bridge device = = general s 'in the personal computer, the parallel port includes three groups of 8-bit register for use To do the reading and writing of I / O signals, but the interface = and the transmission speed is still not reasonable, passing φ 妩 your strong phase is quite slow. The read/write speed of data between the machine and the device is =, the present invention proposes a bridging interface to effectively overcome the conventional deficiency. Buying method ‘ 【Contents】

V. Description of the invention (2) Red to make the interface have complete data handshake (H 俾 can work at any transmission speed. naKe' is another purpose of writing the moon, which is to provide a bridge interface : The system can be easily designed to be combined with the existing system, 2 = light = 2: the purpose is to provide a bridging interface, which is easy to convert any other bus (Bus) command stream. The data writing method of the bridge interface is applicable to the device, and the host end and the method include the following step triggering channel. After the orientation is reached, the U-out terminal 2 establishes the starting device channel as the high-end Fu 2«, the Bellow output. The command channel is pulled to a low Ub) the host receives the target trigger channel as a low level, indicating that the device is ready to be connected, = enter; otherwise; (c). The host transmits the data to the device ( c) Adding between people-steps: already = the level of release of the final write command channel, ... the lower-pen data is the next step τ seed profit; the bridge interface for the single data read method package, the data Ϊ ί ί ί 确立 确立 确立 确立 确立 确立 确立 确立 确立 确立 确立 确立 确立 确立 确立 确立 确立The position of the 7-channel of the 丨 wheel is low; (b)· 誃# 里令 channel 2 1 ί to the bus; (C)·The host side releases the data 'out' To release a data read and write command: 1287708. --1~ ---------------- V. Description of the invention (3) f(d)·passed by the host The bus bar receives the data placed by the device' to complete a readout period of a data. Moreover, a method for performing multiple data reading by using a bridge interface includes an I column step: (a) after the host device establishes that the startup device channel is at a low level, the position of a data output command channel is lowered; (b) The device pulls a data input command channel down to obtain the mastership of a data read/write command; (c) the device puts the data onto the busbar; (d). The host side releases the data from the command channel to release the master control of the data read/write command; (e) the host receives the data placed by the device through the bus, completing the first stroke The readout period of the data; and (f). According to the number of the data, the readout period of each of the data after the first two materials is taken as steps (3)), (c) & (e) Reading a piece of data repeats steps (b), (c), and (e) to form a complex period, and in the last cycle, changing step (b) to the device to input the data into the command channel. To inform the host of the next data as the final information, (c) and (e). The purpose of the present invention, the technical content, the features, and the effect of the present invention are easily explained by the specific embodiments in conjunction with the accompanying drawings. [Embodiment] The present invention is an appropriate control of the signal level and timing of a bridging interface between data reading and writing technology, and the second is performed by any machine and handshake. Speed faint I face has 70 full reciprocal work, and can be light

Page 7 V. Description of the invention (4) Easy to convert the command stream of any bus at the front end. As shown in the first figure, the bridge interface 1 of the present invention is a connection interface between the host terminal 12 and a device 14, wherein on the hardware, the host terminal 12 and the device 14 are connected via a bus ( Connected to the device 14 so that the host 12 can use the bridge interface 1 to transmit/read data to the f device 14. The data reading and writing method of the bridge interface 1〇 proposed by the invention includes reading and writing, wherein the reading can be further divided into single data reading (Singie data read) and multiple data reading (Multi-data read). The writing can also be a single-single-single-single-single-single-single-single-single-single-single-single-single-single-single-single-single-single-single-single-single-single-single-single-single-single-single-speech ~ jin as shown in the first figure, is a single-funded method of the bridge interface of the present invention, wherein the host reads the data read and write command (FT ^ "" command command channel (FTA_0) on the host side to indicate 'device to FTA' = ", the input command channel FTA" is indicated; delete - and pass [signal transfer, start ^ set mountain" (8) ... and target device (7) (4) use: the device is ready for data transfer; The shell material (0&1&) is usually a bidirectional (61 (1^^^〇11) and three- (Tri-sta^e) signal, and a parallel pull-up (pun Η ϋ this bridge interface single The pen data writing method includes the following steps: v is described by the host side, as shown in the figure, the timing is & to h: ,

u). After the host device establishes the startup device channel IRDY =:)..., the data output command is pulled through a 4 to 1287708

V. Description of the invention (5) (b) · The host side detection indicates that the device is approved (c) · The host side will be the most data (d) · The data will be placed in (e) · The host side will detect IRDY - Pull to low position (f) · Host side detection means that the device has (g) · Release data sink (h). When the device is activated, the device reads and writes data, so the device (Low) . As shown in the third figure, the host side a to η: (a) · the host end is a', the data is rotated (2) · the host side detects that the device is ready (c) · the device will (d) · The host will initiate the target trigger channel TRDY~ to the low level (L〇w) to receive the data. = Loss: The command channel FTA_0 is released as a standard. The data of the bus is on the bus. After the FTA is high, the device channel will be activated to inform the device that the data is ready. To the target trigger channel TRDY_ is high level (H data is taken. Stream. Channel 1RDY - the position is pulled high (High) to inform the flow has been released. So far all data is written, command FTA one for the game The level indicates that the data is the last one and will not pull the target trigger channel TRDY-lower. For the viewpoint of multiple data of the bridge interface of the present invention, the following steps are included, and the timing is the vertical start device channel. IRDY—After the high level, the command channel FTA—the position of the command channel is low (L〇w). To the target trigger channel TRDY—the low level (L〇w), the data can be received.排上. Actuator channel IRDY - pull low (Low) to inform the

Page 9 1287708 ------_ V. Description of the invention (6) The device information is ready. (e) The host detects the target trigger channel TRDY—indicating that the device has taken the data away. ^lgh) * (f) · Release the data bus. (^)· Pull the start device channel ^!^ to the high level (High) to notify the data sink that the release has been released. At this point, the first data is written. ^Pre-W reserve=;: Through-axis- The lower level indicates that the child has been installed (^) = the material output command channel FTA-〇 release ' indicates that the next data is (j) · the data is placed on the data bus. = After the host is ready to measure the FFU high level, the device channel (l) will be activated (Low) to inform the device that the data is ready. (The target trigger channel TRDY is detected as a high-level preparation. The device has taken the data away. 叩) The table should not be (m) • Release the data bus. (η)·Start the device channel ^... The device data bus has been released to 2 V? Inform the data reading and writing command FTU high level (Hi County, when 'data, 兮gj: τ^ table is not the last - 簦 (Low) wide target trigger channel TRDY~ pulled to low position as shown in the fourth figure , the bridging method of the present invention, from the perspective of the host side, includes the following cards = early pens, 3 to [: the steps of the column, and the timing is page 10, invention description (7) ( a) .= The host side is in the establishment of the boot device channel delete - the second is, the data output command channel FTA_ is pulled to the low level (b) · The device puts a piece of data on the bus bar; c). The host detects the target trigger as indicating that the device has placed the data in the bus: wide-for-) (release the data output command channel fta-q level) to release the bellow 5 write command The master control of the FTA 1. The main pull machine is the end, the bit = bus bar takes the data away, and pulls the start device channel IRDY to the level (High) to inform the device: the wide machine: ί Trigger channel TRDY- is high level (Highl, Λ Λ fΪ, because the data read and write command FTA- has been two quasi-two υ, ν pen data, it is no longer The start device channel IRDY is pulled low (L〇w), and all the data is read. At this point, the method of reading and & to ^: micro-ends of the interface is 3:: The following steps, and the timing is (a) · The host side establishes the starter channel irdy - that is, a, and the data is rotated out of the command channel FTA - 〇 position H (L〇w, (b) · the device Enter the data into the command channel to pull the user's position: (Low) to obtain the master control of the data read and write command Fn. - (c) · The device puts the data on the bus. (1d) · The host detects the target trigger channel TRDY- is low. The device has placed the data on the bus. - Table 1287708. V. Description of the invention (8) (e) · The host side outputs the data. The command channel FTA-〇 is released to release the master control of the data read/write command FTA_. (f) The host side removes the data and pulls the boot device channel high to notify the The device data has been taken away, and the read cycle of the first data is completed. (g) The host side extracts the target trigger channel Trdy—high level Jjigh), indicating that a piece of data has been transferred. (h) The device releases the data into the command channel FTA-i to notify the host that the next data is the last data. (i) The host detects the target trigger channel. TRDY—lower level “(10)), indicating that the device has placed the data on the busbar. (j) The host side removes the data and pulls the initiator channel IRDY to a high level to notify the The device data has been taken away. (k) · The host side debt detection target trigger channel TRDY - is high level (High), indicating a data, because the data read and write command FTA_ has been high, that is, the last data, Therefore, the host side no longer pulls the boot device channel irdy to the low level (Low), and all the data reading is completed. - Therefore, when provided by the present invention, it has a complete data handshake operation, and this method can easily provide the advantage of high compatibility. In addition, the bridging interface of any bus bar of the front end can be easily converted, and data reading and writing can be performed, and can be combined with the existing system at any transmission speed, and the method of the present invention is adopted. The command flow of the bridging interface . The above description illustrates the features of the present invention by way of example, 1 enabling those skilled in the art to understand the contents of the present invention and/or

Page 12 1287708 V. OBJECTS OF THE INVENTION (9) The scope of the patents of the present invention is intended to be included in the scope of the claims described below without departing from the spirit of the invention. .

1287708. Brief description of the circle [Simplified description of the drawings] The first figure is a bridge block diagram of the host and device of the present invention. The second figure is a timing diagram of the bridge interface of the present invention when writing a single data. The third figure is a timing diagram of the bridge interface of the present invention when multiple data is written. The fourth figure is a timing diagram of the bridge interface of the present invention when reading a single data. The fifth figure is a timing diagram of the bridge interface of the present invention when multiple data are read. [Main component symbol description]

1 〇 bridge interface 12 host 14 device

Page 14

Claims (1)

1287708 6. Patent application scope 1. A method for writing data of a bridge interface, which is suitable for a host to write data through a bus to a device, and a boot device channel is established between the host terminal and the device. a target trigger channel, the boot device channel and the target trigger channel are respectively driven by the host end and the device, and the method comprises the following steps: (a) after the host end establishes that the boot device channel is at a high level, (b) The host detects that the target trigger channel is low, indicating that the device is ready to receive data written by the host; (C) · the host Transmitting a data to the device through the bus, a write cycle of the first data; and (d) - writing () according to the data, data () and step (c) as per pen A further step is added between (C), in step (b) and the level of the channel is released, in order to output the output of the material. 2. The bridge and the joint surface as described in the first claim of the patent scope are ^ Ultimate Bellow. The method, wherein, in the step (c), the method for writing the main billet period of the main body further comprises the following steps: " the machine end writes a data to the busbar to put the data into the busbar Start the device channel bit J: sink" - row; set the data to be taken: pass ίί: to J high 'if it means that the data is ready; low to inform the device to write the first Page 15 1287708 VI. The scope of application for patents is released to the level of the data bus; and the position of the three channels is set to the stomach to notify the device that the data has been released, and a data is written into the week. For example: the data writing method of the bridge interface described in item 1 of the patent, 'the data input channel and the direct ion of the data. 4. In the method of applying the bridge interface described in item i of the patent scope, the data output command channel and the data are tri-state and signal signals. 5. For the bridging method described in the scope of the patent application, it is applicable to the writing of single and multiple data. <Zi Zhao write party 6 rattan ί 5 connection; 1 side of the data reading method 'applicable to the host side through - ^ pa ^ . ^ I set to read a note, and the host and the package ψ^ η ^ ^ device channel and a target trigger channel, the boot device trigger channel is driven by the host terminal and the device respectively, the method comprises the following steps: (a) The host terminal establishes that the boot device channel is low The position of the output command channel is low; the early Jun will be the bei (b) · the device puts the data on the bus; the data is output to the command channel to release a bit of material The master of the write command; and (d) the host receives the readout period of the data by the host through the bus. 7. The data reader of the bridge interface as described in item 6 of the patent application scope Page 16 1287708 & Patent Application Scope, between step (b) and step (c), further including a step, the μ host detects that the target trigger channel has a low level, indicating that the device The data has been placed on the bus. 8) The data reading party of the bridge interface according to item 6 of the patent application scope, wherein in the step (d), the method for the host end to receive the data of the device further comprises the following steps: the data is taken away, and Pulling the level of the activation device channel high to notify the device that the data has been taken away; and measuring whether the target trigger channel level is high, and if so, indicating a The data has been transferred, if it continues to wait, then complete the reading cycle of a data. 9. The data reading method of the bridge interface as described in claim 6 of the patent application 'where' the data read and write command and the data are bi-directional (bi-direct ion) signals. 1. The method for reading the data of the bridge interface as described in item 6 of the patent application scope is wherein the data read/write command and the data are tri-signal signals. • Data reading method for % bridge interface, suitable for one host end The bus reads a plurality of data from a device, and a boot device channel and a target trigger channel are established between the host and the device, and the boot device channel and the target trigger channel are respectively configured by the host device and The method is driven by the following steps: U) · After the host terminal establishes that the startup device channel is at a low level, the position of a data output command channel is pulled low; Page 17 1287708 VI. Scope of Application for Patent (b) Jf sets the position of a data input command channel to be low to obtain the mastership of a data read/write command; (C) · The device puts the # data Up to the bus, (d) A, the host side releases the data output command channel to release the master control of the data read/write command; (e) · The host receives the bus through the bus The data placed by the device completes the reading period of the first data; and the number of the data, with steps (b), (c) and (e) as the first and second data The read cycle, repeating steps (b), (c), and (e) each time a data is read to form a complex period, and in the last cycle, changing step (b) to the device to input the data into the command channel The level is released to inform the host that the next data is the most recent (c) and (e).垔 垔 \ 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如The level of the trigger channel to the target is low, = the data has been placed on the bus. ^Device 13: The method for reading data of the bridge interface as described in claim 11 of the invention, wherein in the step (e), the host terminal receives the loading method and further includes the following steps: The data is taken away, and the level of the starting device channel is pulled high, and the device is notified that the data has been taken away; and 0 is used to measure whether the level of the target trigger channel is high, and if so, the data is represented. Has been completed, if otherwise continue to wait, and then complete a / capital & pen Page 18 1287708 VI. Patent application scope Readout period. 14. The method for reading data of a bridge interface according to claim 11, wherein the data read/write command and the data are bidirectional (bi-direct ion) signals. The bridging interface method, second, the data read and write command and the data are three '=out party signal) Page 19