diff options
| -rw-r--r-- | Makefile | 4 | ||||
| -rw-r--r-- | icepll/.gitignore | 3 | ||||
| -rw-r--r-- | icepll/Makefile | 22 | ||||
| -rw-r--r-- | icepll/icepll.cc | 174 | ||||
| -rw-r--r-- | icetime/icetime.cc | 16 |
5 files changed, 219 insertions, 0 deletions
@@ -5,6 +5,7 @@ all: $(MAKE) -C icepack $(MAKE) -C iceprog $(MAKE) -C icemulti + $(MAKE) -C icepll # $(MAKE) -C icetime clean: @@ -12,6 +13,7 @@ clean: $(MAKE) -C icepack clean $(MAKE) -C iceprog clean $(MAKE) -C icemulti clean + $(MAKE) -C icepll clean # $(MAKE) -C icetime clean install: @@ -19,6 +21,7 @@ install: $(MAKE) -C icepack install $(MAKE) -C iceprog install $(MAKE) -C icemulti install + $(MAKE) -C icepll install # $(MAKE) -C icetime install uninstall: @@ -26,6 +29,7 @@ uninstall: $(MAKE) -C icepack uninstall $(MAKE) -C iceprog uninstall $(MAKE) -C icemulti uninstall + $(MAKE) -C icepll uninstall # $(MAKE) -C icetime uninstall .PHONY: all clean install uninstall diff --git a/icepll/.gitignore b/icepll/.gitignore new file mode 100644 index 0000000..385a169 --- /dev/null +++ b/icepll/.gitignore @@ -0,0 +1,3 @@ +icepll +icepll.o +icepll.d diff --git a/icepll/Makefile b/icepll/Makefile new file mode 100644 index 0000000..9a190f6 --- /dev/null +++ b/icepll/Makefile @@ -0,0 +1,22 @@ +include ../config.mk +LDLIBS = -lm -lstdc++ +CXXFLAGS = -MD -O0 -ggdb -Wall -std=c++11 -I/usr/local/include + +all: icepll + +icepll: icepll.o + +install: all + mkdir -p $(DESTDIR)$(PREFIX)/bin + cp icepll $(DESTDIR)$(PREFIX)/bin/icepll + +uninstall: + rm -f $(DESTDIR)$(PREFIX)/bin/icepll + +clean: + rm -f icepll *.o *.d + +-include *.d + +.PHONY: all install uninstall clean + diff --git a/icepll/icepll.cc b/icepll/icepll.cc new file mode 100644 index 0000000..261cf0a --- /dev/null +++ b/icepll/icepll.cc @@ -0,0 +1,174 @@ +// +// Copyright (C) 2015 Clifford Wolf <clifford@clifford.at> +// +// Permission to use, copy, modify, and/or distribute this software for any +// purpose with or without fee is hereby granted, provided that the above +// copyright notice and this permission notice appear in all copies. +// +// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +// + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <math.h> + +const char *binstr(int v, int n) +{ + static char buffer[16]; + char *p = buffer; + + for (int i = n-1; i >= 0; i--) + *(p++) = ((v >> i) & 1) ? '1' : '0'; + *(p++) = 0; + + return buffer; +} + +void help(const char *cmd) +{ + printf("\n"); + printf("Usage: %s [options]\n", cmd); + printf("\n"); + printf(" -i <input_freq_mhz>\n"); + printf(" PLL Input Frequency (default: 12 MHz)\n"); + printf("\n"); + printf(" -o <output_freq_mhz>\n"); + printf(" PLL Output Frequency (default: 60 MHz)\n"); + printf("\n"); + printf(" -S\n"); + printf(" Disable SIMPLE feedback path mode\n"); + printf("\n"); + exit(1); +} + +int main(int argc, char **argv) +{ + double f_pllin = 12; + double f_pllout = 60; + bool simple_feedback = true; + + int opt; + while ((opt = getopt(argc, argv, "i:o:S")) != -1) + { + switch (opt) + { + case 'i': + f_pllin = atof(optarg); + break; + case 'o': + f_pllout = atof(optarg); + break; + case 'S': + simple_feedback = false; + break; + default: + help(argv[0]); + } + } + + if (optind != argc) + help(argv[0]); + + bool found_something = false; + double best_fout = 0; + int best_divr = 0; + int best_divf = 0; + int best_divq = 0; + + if (f_pllin < 10 || f_pllin > 133) { + fprintf(stderr, "Error: PLL input freqency %.3f MHz is outside range 10 MHz - 133 MHz!\n", f_pllin); + exit(1); + } + + if (f_pllout < 16 || f_pllout > 275) { + fprintf(stderr, "Error: PLL output freqency %.3f MHz is outside range 16 MHz - 275 MHz!\n", f_pllout); + exit(1); + } + + for (int divr = 0; divr <= 15; divr++) + { + double f_pfd = f_pllin / (divr + 1); + if (f_pfd < 10 || f_pfd > 133) continue; + + for (int divf = 0; divf <= 127; divf++) + { + if (simple_feedback) + { + double f_vco = f_pfd * (divf + 1); + if (f_vco < 533 || f_vco > 1066) continue; + + for (int divq = 1; divq <= 6; divq++) + { + double fout = f_vco * exp2(-divq); + + if (fabs(fout - f_pllout) < fabs(best_fout - f_pllout) || !found_something) { + best_fout = fout; + best_divr = divr; + best_divf = divf; + best_divq = divq; + found_something = true; + } + } + } + else + { + for (int divq = 1; divq <= 6; divq++) + { + double f_vco = f_pfd * (divf + 1) * exp2(divq); + if (f_vco < 533 || f_vco > 1066) continue; + + double fout = f_vco * exp2(-divq); + + if (fabs(fout - f_pllout) < fabs(best_fout - f_pllout) || !found_something) { + best_fout = fout; + best_divr = divr; + best_divf = divf; + best_divq = divq; + found_something = true; + } + } + } + } + } + + double f_pfd = f_pllin / (best_divr + 1);; + double f_vco = f_pfd * (best_divf + 1); + + if (!simple_feedback) + f_vco *= exp2(best_divq); + + if (!found_something) { + fprintf(stderr, "Error: No valid configuration found!\n"); + exit(1); + } + + printf("\n"); + + printf("F_PLLIN: %8.3f MHz (given)\n", f_pllin); + printf("F_PLLOUT: %8.3f MHz (requested)\n", f_pllout); + printf("F_PLLOUT: %8.3f MHz (achieved)\n", best_fout); + + printf("\n"); + + printf("FEEDBACK: %s\n", simple_feedback ? "SIMPLE" : "NON_SIMPLE"); + printf("F_PFD: %8.3f MHz\n", f_pfd); + printf("F_VCO: %8.3f MHz\n", f_vco); + + printf("\n"); + + printf("DIVR: %2d (4'b%s)\n", best_divr, binstr(best_divr, 4)); + printf("DIVF: %2d (7'b%s)\n", best_divf, binstr(best_divf, 7)); + printf("DIVQ: %2d (3'b%s)\n", best_divq, binstr(best_divq, 3)); + + printf("\n"); + + return 0; +} diff --git a/icetime/icetime.cc b/icetime/icetime.cc index b4abbd6..6c56f8f 100644 --- a/icetime/icetime.cc +++ b/icetime/icetime.cc @@ -1,3 +1,19 @@ +// +// Copyright (C) 2015 Clifford Wolf <clifford@clifford.at> +// +// Permission to use, copy, modify, and/or distribute this software for any +// purpose with or without fee is hereby granted, provided that the above +// copyright notice and this permission notice appear in all copies. +// +// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +// + #include <stdio.h> #include <stdlib.h> #include <unistd.h> |