Embedded RTOS class project. This project allows a Python/Tk program running on a PC host to monitor/control a test-CPU programmed into an altera development board.
Dependencies: C12832_lcd USBDevice mbed-rtos mbed mmSPI-2 watchdog
Fork of USB_device_project by
Diff: mmRTL/scan_08.txt
- Revision:
- 3:659ffc90b59e
- Child:
- 7:d1aca9ccbab8
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mmRTL/scan_08.txt Sun Sep 01 02:53:39 2013 +0000 @@ -0,0 +1,58 @@ +/*----------------------------------copyright---------------------------------*/ +// licensed for personal and academic use. +// commercial use must be approved by the account-holder of +// gated.clock@gmail.com +/*-----------------------------------module-----------------------------------*/ + module scan_08 // shadow register. + ( + oParallel, // parallel-output data. + iParallel, // parallel-input data. + oSerial, // serial-output data. + iSerial, // serial-input data. + iLoadEnable, // parallel-load-enable. + iShiftEnable, // serial-shift-enable. + iResetN, // synchronous reset*. + iClk // module clock. + ); +/*--------------------------------description----------------------------------- + an 8-bit parallel shift-register. +-------------------------------------notes-------------------------------------- + shifting is LSB->MSB. +------------------------------------defines-----------------------------------*/ +/*-----------------------------------ports------------------------------------*/ + output [ 7:0] oParallel; // parallel-output data. + input [ 7:0] iParallel; // parallel-input data. + output oSerial; // serial-output data. + input iSerial; // serial-input data. + input iLoadEnable; // parallel-load-enable. + input iShiftEnable; // serial-shift-enable. + input iResetN; // synchronous reset*. + input iClk; // module clock. +/*-----------------------------------wires------------------------------------*/ + wire [ 7:0] oParallel; // parallel-output data. + wire [ 7:0] iParallel; // parallel-input data. + wire [ 7:0] wParallelIn; // select the parallel input. + wire oSerial; // serial-output data. + wire iSerial; // serial-input data. + wire iLoadEnable; // parallel-load-enable. + wire iShiftEnable; // serial-shift-enable. + wire iResetN; // synchronous reset*. + wire iClk; // module clock. +/*---------------------------------registers----------------------------------*/ + reg [ 7:0] rRegister; // the register. +/*---------------------------------variables----------------------------------*/ +/*---------------------------------parameters---------------------------------*/ +/*-----------------------------------clocks-----------------------------------*/ +/*---------------------------------instances----------------------------------*/ +/*-----------------------------------logic------------------------------------*/ + always @ (posedge iClk or negedge iResetN) + begin + if (!iResetN) rRegister <= 8'h00; + else if (iLoadEnable) rRegister <= iParallel; + else if (iShiftEnable) rRegister <= {rRegister[6:0], iSerial}; + else rRegister <= rRegister; + end + + assign oParallel = rRegister; // propagate parallel-out. + assign oSerial = rRegister[7]; // propagate serial-out. +/*-------------------------------*/endmodule/*--------------------------------*/