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changing the bitstream read and push strategy.

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It seems that thread heap space is neither large nor consistent across OSs. Specifically on windows I couldn't get a large enough buffer for the whole bitstream in one go, so I'm reading incrementally now
This commit is contained in:
nelisky 2012-03-14 21:32:57 +00:00
parent a35205d3f2
commit c5897683be
1 changed files with 59 additions and 44 deletions
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103
libztex.c
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@ -118,10 +118,10 @@ static int libztex_getFpgaState (struct libztex_device *ztex, struct libztex_fpg
static int libztex_configureFpgaLS (struct libztex_device *ztex, const char* firmware, bool force, char bs) {
struct libztex_fpgastate state;
unsigned char buf[8*1024*1024], cs;
ssize_t pos=0;
int transactionBytes = 2048;
int tries, cnt, i, j;
unsigned char buf[transactionBytes], cs;
int tries, cnt, buf_p, i;
FILE *fp;
if (!libztex_checkCapability(ztex, CAPABILITY_FPGA)) {
@ -135,55 +135,70 @@ static int libztex_configureFpgaLS (struct libztex_device *ztex, const char* fir
}
}
fp = fopen(firmware, "rb");
if (!fp) {
applog(LOG_ERR, "%s: failed to read firmware '%s'", ztex->repr, firmware);
return -2;
}
while (!feof(fp)) {
buf[pos++] = getc(fp);
};
pos--;
applog(LOG_ERR, "%s: read firmware, %d bytes", ztex->repr, pos);
fclose(fp);
if ( bs<0 || bs>1 )
bs = libztex_detectBitstreamBitOrder(buf, transactionBytes<pos ? transactionBytes : pos);
if ( bs == 1 )
libztex_swapBits(buf, pos);
for (tries=10; tries>0; tries--) {
//* Reset fpga
fp = fopen(firmware, "rb");
if (!fp) {
applog(LOG_ERR, "%s: failed to read firmware '%s'", ztex->repr, firmware);
return -2;
}
cs = 0;
while (pos < transactionBytes && !feof(fp)) {
buf[pos] = getc(fp);
cs += buf[pos++];
};
if (feof(fp))
pos--;
if ( bs<0 || bs>1 )
bs = libztex_detectBitstreamBitOrder(buf, transactionBytes<pos ? transactionBytes : pos);
//* Reset fpga
cnt = libztex_resetFpga(ztex);
if (unlikely(cnt < 0)) {
applog(LOG_ERR, "%s: Failed reset fpga with err %d", ztex->repr, cnt);
continue;
}
cs = 0;
i = 0;
while (i < pos) {
j = (i+transactionBytes) > pos ? pos-i : transactionBytes;
cnt = libusb_control_transfer(ztex->hndl, 0x40, 0x32, 0, 0, &buf[i], j, 5000);
if (unlikely(cnt < 0)) {
applog(LOG_ERR, "%s: Failed send fpga data with err %d", ztex->repr, cnt);
if ( bs == 1 )
libztex_swapBits(buf, pos);
buf_p = pos;
while (1) {
i = 0;
while (i < buf_p) {
cnt = libusb_control_transfer(ztex->hndl, 0x40, 0x32, 0, 0, &buf[i], buf_p-i, 5000);
if (unlikely(cnt < 0)) {
applog(LOG_ERR, "%s: Failed send fpga data with err %d", ztex->repr, cnt);
break;
}
i += cnt;
}
if (i < buf_p || buf_p < transactionBytes)
break;
}
for (j=0; j<cnt; j++) {
cs = (cs + (buf[i+j] & 0xFF)) & 0xFF;
}
i += cnt;
}
if (i < pos) {
continue;
}
tries = 0;
libztex_getFpgaState(ztex, &state);
if (!state.fpgaConfigured) {
applog(LOG_ERR, "%s: FPGA configuration failed: DONE pin does not go high", ztex->repr);
return 3;
buf_p = 0;
while (buf_p < transactionBytes && !feof(fp)) {
buf[buf_p] = getc(fp);
cs += buf[buf_p++];
};
if (feof(fp))
buf_p--;
pos += buf_p;
if (buf_p == 0)
break;
if ( bs == 1 )
libztex_swapBits(buf, buf_p);
}
if (cnt >= 0)
tries = 0;
fclose(fp);
}
libztex_getFpgaState(ztex, &state);
if (!state.fpgaConfigured) {
applog(LOG_ERR, "%s: FPGA configuration failed: DONE pin does not go high", ztex->repr);
return 3;
}
usleep(200000);
applog(LOG_ERR, "%s: FPGA configuration done", ztex->repr);
@ -323,7 +338,7 @@ int libztex_prepare_device (struct libusb_device *dev, struct libztex_device** z
newdev->maxErrorRate[cnt] = 0;
}
cnt = strlen(&buf[buf[0]==4?10:8]);
cnt = strlen((char *)&buf[buf[0]==4?10:8]);
newdev->bitFileName = malloc(sizeof(char)*(cnt+1));
memcpy(newdev->bitFileName, &buf[buf[0]==4?10:8], cnt+1);