fpga.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:4k
- /*
- * Copyright (C) Eicon Technology Corporation, 2000.
- *
- * Eicon File Revision : 1.2
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- */
- #include "sys.h"
- #include "idi.h"
- #include "uxio.h"
- #define FPGA_PORT 0x6E
- #define FPGA_DLOAD_BUFLEN 256
- #define NAME_OFFSET 0x10
- #define NAME_MAXLEN 12
- #define DATE_OFFSET 0x2c
- #define DATE_MAXLEN 10
- word UxCardPortIoInW(ux_diva_card_t *card, byte *base, int offset);
- void UxCardPortIoOutW(ux_diva_card_t *card, byte *base, int offset, word);
- void UxPause(long int);
- /*-------------------------------------------------------------------------*/
- /* Loads the FPGA configuration file onto the hardware. */
- /* Function returns 0 on success, else an error number. */
- /* On success, an identifier string is returned in the buffer */
- /* */
- /* A buffer of FPGA_BUFSIZE, a handle to the already opened bitstream */
- /* file and a file read function has to be provided by the operating */
- /* system part. */
- /* ----------------------------------------------------------------------- */
- int FPGA_Download( word cardtype,
- dword RegBase,
- byte *strbuf,
- byte FPGA_SRC[],
- int FPGA_LEN
- )
- {
- word i, j, k;
- word baseval, Mask_PROGRAM, Mask_DONE, Mask_CCLK, Mask_DIN;
- dword addr;
- byte *pFPGA;
- //--- check for legal cardtype
- switch (cardtype)
- {
- case IDI_ADAPTER_MAESTRAQ:
- addr = RegBase ; // address where to access FPGA
- Mask_PROGRAM = 0x0001; // FPGA pins at address
- Mask_DONE = 0x0002;
- Mask_CCLK = 0x0100;
- Mask_DIN = 0x0400;
- baseval = 0x000d; // PROGRAM hi, CCLK lo, DIN lo by default
- break;
-
- default:
-
- DPRINTF(("divas: FPGA Download ,Illegal Card"));
- return -1; // illegal card
- }
- //--- generate id string from file content
- for (j=NAME_OFFSET, k=0; j<(NAME_OFFSET+NAME_MAXLEN); j++, k++) //name
- {
- if (!FPGA_SRC[j]) break;
- strbuf[k] = FPGA_SRC[j];
- }
- strbuf[k++] = ' ';
- for (j=DATE_OFFSET; j<(DATE_OFFSET+DATE_MAXLEN); j++, k++) // date
- {
- if (!FPGA_SRC[j]) break;
- strbuf[k] = FPGA_SRC[j];
- }
- strbuf[k] = 0;
- DPRINTF(("divas: FPGA Download - %s", strbuf));
- //--- prepare download, Pulse PROGRAM pin down.
- UxCardPortIoOutW(NULL, (byte *) addr, FPGA_PORT, baseval &~Mask_PROGRAM); // PROGRAM low pulse
- UxCardPortIoOutW(NULL, (byte *) addr, FPGA_PORT, baseval); // release
- UxPause(50); // wait until FPGA finised internal memory clear
-
- //--- check done pin, must be low
- if (UxCardPortIoInW(NULL, (byte *) addr, FPGA_PORT) &Mask_DONE)
- {
- DPRINTF(("divas: FPGA_ERR_DONE_WRONG_LEVEL"));
- return -1;
- }
- pFPGA = FPGA_SRC;
- i = 0;
- /* Move past the header */
- while ((FPGA_SRC[i] != 0xFF) && (i < FPGA_LEN))
- {
- i++;
- }
- // We've hit the 0xFF so move on to the next byte
- // i++;
- DPRINTF(("divas: FPGA Code starts at offset %d", i));
- //--- put data onto the FPGA
- for (;i<FPGA_LEN; i++)
- {
- //--- put byte onto FPGA
- for (j=0; j<8; j++)
- {
- if (FPGA_SRC[i] &(0x80>>j)) baseval |= Mask_DIN; // write a hi
- else baseval &=~Mask_DIN; // write a lo
- UxCardPortIoOutW(NULL, (byte *) addr, FPGA_PORT, baseval);
- UxCardPortIoOutW(NULL, (byte *) addr, FPGA_PORT, baseval | Mask_CCLK); // set CCLK hi
- UxCardPortIoOutW(NULL, (byte *) addr, FPGA_PORT, baseval); // set CCLK lo
- }
- }
- //--- add some additional startup clock cycles and check done pin
- for (i=0; i<5; i++)
- {
- UxCardPortIoOutW(NULL, (byte *) addr, FPGA_PORT, baseval | Mask_CCLK); // set CCLK hi
- UxCardPortIoOutW(NULL, (byte *) addr, FPGA_PORT, baseval); // set CCLK lo
- }
- UxPause(100);
- if (UxCardPortIoInW(NULL, (byte *) addr, FPGA_PORT) &Mask_DONE)
- {
- DPRINTF(("divas: FPGA download successful"));
- }
- else
- {
- DPRINTF(("divas: FPGA download failed - 0x%x", UxCardPortIoInW(NULL, (byte *) addr, FPGA_PORT)));
- return -1;
- }
- return 0;
- }