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Table 3.2 inputs/ outputs assigned to FPGA board with description For input we used FPGA switches SWO, SW1, SW2, selection of product and switches SW8, SW9, SW10 for token_ in and switches SW4 for product available. For output we use LED of FPGA board to indicate either Token return or product_ out.

Table 3 2 inputs/ outputs assigned to FPGA board with description For input we used FPGA switches SWO, SW1, SW2, selection of product and switches SW8, SW9, SW10 for token_ in and switches SW4 for product available. For output we use LED of FPGA board to indicate either Token return or product_ out.

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Table 3.1. Selection of IC with their respective encoding The propose machine state diagram is constructed to vend out seven Integrated Circuit (IC) that is AND- GATE,OR-GATE,NOT-GATE,NOR-GATE,NAND-GATE,EXOR-GATE,EXNORGATE. The seven select vector input state are of 3bits wide with encoding (ANDGATE (001), ORGATE (010), NOTGATE (011), NORGATE (100), NANDGATE (101), EXORGATE.Table3.1 shows the selection of IC with their respective encoding and token- in with color and each encoding. Here to select AND-GATE user has to input binary code 001 so that the controller will transfer the command to waiting state. (110) and EXNORGATE (111) for selection IC. The select ANDGATE is used for selection of AND-GATE, similarly for ORGATE, NOTGATE, NORGATE, NANDGATE, EXORGATE, EXNORGATE for selection of OR-GATE, NOT-GATE, NOT-GATE, NOR-GATE, NAND-GATE, EXOR-GATE, EXNOR-GATE. The Token_ in vectors for respective IC are also of 3bits wide with different colors and encoded as (GREEN (001), BLUE (010), WHITE (011), YELLOW (100), BLACK (101), ORANGE (110) and RED (111). A cancel is used when the customers want to withdraw the process, if the user has inserted the token and want to cancel the process then the inserted token will be automatically return to the user [1]. The return token vectors are of 3 bits to return the inserted token if it doesn’t match with selected IC. There are two input signal clock and reset [4]. This machine work when clock signal is on positive edge and when reset signal is high the process will return to the initial state. The proposed vending machine is designed using VHDL
Table 3.1. Selection of IC with their respective encoding The propose machine state diagram is constructed to vend out seven Integrated Circuit (IC) that is AND- GATE,OR-GATE,NOT-GATE,NOR-GATE,NAND-GATE,EXOR-GATE,EXNORGATE. The seven select vector input state are of 3bits wide with encoding (ANDGATE (001), ORGATE (010), NOTGATE (011), NORGATE (100), NANDGATE (101), EXORGATE.Table3.1 shows the selection of IC with their respective encoding and token- in with color and each encoding. Here to select AND-GATE user has to input binary code 001 so that the controller will transfer the command to waiting state. (110) and EXNORGATE (111) for selection IC. The select ANDGATE is used for selection of AND-GATE, similarly for ORGATE, NOTGATE, NORGATE, NANDGATE, EXORGATE, EXNORGATE for selection of OR-GATE, NOT-GATE, NOT-GATE, NOR-GATE, NAND-GATE, EXOR-GATE, EXNOR-GATE. The Token_ in vectors for respective IC are also of 3bits wide with different colors and encoded as (GREEN (001), BLUE (010), WHITE (011), YELLOW (100), BLACK (101), ORANGE (110) and RED (111). A cancel is used when the customers want to withdraw the process, if the user has inserted the token and want to cancel the process then the inserted token will be automatically return to the user [1]. The return token vectors are of 3 bits to return the inserted token if it doesn’t match with selected IC. There are two input signal clock and reset [4]. This machine work when clock signal is on positive edge and when reset signal is high the process will return to the initial state. The proposed vending machine is designed using VHDL
The state diagram composed of four states (selection, waiting state, product delivery and token return) he t is assumed the product available is always greater than |. The machine is in initial state when reset signal is low When reset is high the users can select IC to be dispensed. This state can be anyone of the select state (AND_GA’ IR_GATE, NOT_GATE, NOR_GATE, NAND_GATE, EXOR_GATE and EXNOR_GATE). The machine will iccept seven types of token _ in i.e. Green, Blue, White, Yellow, Black, Orange, and Red their encoding are 001,010,011,100,101,110,111). Assuming that the users want to dispense ANDGATE he has to select AND_GA’ nput from the selection option [11]. The availability of product is check in the first state of the machine [5]. After his the control units will direct the command to the waiting state where it will wait for users to insert the token. A f product available is less than 1 it will go back to initial state for servicing. If the users insert token Green (001) | select AND_GATE then it will dispensed the Integrated Circuit IC) ANDGATE. Else if the users has selected AND_GATE and inserted the token Blue, White, Yellow, Black, Orange, Red (010, 011,100,101,110,111) it will 1utomatically return the inserted token [1],[6]. If in any state of process cancel is pressed then it will return the nserted token and return to the initial state. The algorithmic stages of the proposed design are shown Figure 4.1 Figure 4.2.represents the state diagram of the proposed design. Figure4.1: flow chart of the proposed vending machine
The state diagram composed of four states (selection, waiting state, product delivery and token return) he t is assumed the product available is always greater than |. The machine is in initial state when reset signal is low When reset is high the users can select IC to be dispensed. This state can be anyone of the select state (AND_GA’ IR_GATE, NOT_GATE, NOR_GATE, NAND_GATE, EXOR_GATE and EXNOR_GATE). The machine will iccept seven types of token _ in i.e. Green, Blue, White, Yellow, Black, Orange, and Red their encoding are 001,010,011,100,101,110,111). Assuming that the users want to dispense ANDGATE he has to select AND_GA’ nput from the selection option [11]. The availability of product is check in the first state of the machine [5]. After his the control units will direct the command to the waiting state where it will wait for users to insert the token. A f product available is less than 1 it will go back to initial state for servicing. If the users insert token Green (001) | select AND_GATE then it will dispensed the Integrated Circuit IC) ANDGATE. Else if the users has selected AND_GATE and inserted the token Blue, White, Yellow, Black, Orange, Red (010, 011,100,101,110,111) it will 1utomatically return the inserted token [1],[6]. If in any state of process cancel is pressed then it will return the nserted token and return to the initial state. The algorithmic stages of the proposed design are shown Figure 4.1 Figure 4.2.represents the state diagram of the proposed design. Figure4.1: flow chart of the proposed vending machine
Figure5.3. simulated waveform for product delivery Figure 5.1. Shows the simulated waveform for product delivery after the users has selected the product, product available is greater than zero and also after the users has inserted the token for EXNOR-GATE i.e. Red (111).
Figure5.3. simulated waveform for product delivery Figure 5.1. Shows the simulated waveform for product delivery after the users has selected the product, product available is greater than zero and also after the users has inserted the token for EXNOR-GATE i.e. Red (111).
Figure 5.5. RTL diagram of proposed vending machine Figure 5.5 represents RTL schematic of proposed vending machine.
Figure 5.5. RTL diagram of proposed vending machine Figure 5.5 represents RTL schematic of proposed vending machine.
Figure 5.4. Simulated waveform for Return of Token
Figure 5.4. Simulated waveform for Return of Token
Table 6.2. The designed device utilization summary comparison with existing machine [7]
Table 6.2. The designed device utilization summary comparison with existing machine [7]
Related topics:
Computer ScienceField Programmable Gate ArrayEmbedded System
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