From: Uwe Hermann Date: Sun, 10 Apr 2011 21:33:43 +0000 (+0200) Subject: Add chronovu-la8 output file format. X-Git-Tag: libsigrok-0.1.0~291 X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=8c48f17944a224787aa430b3b3dc5f8709ccb700;p=libsigrok.git Add chronovu-la8 output file format. --- diff --git a/output/Makefile.am b/output/Makefile.am index b4b4e2c6..dc016c88 100644 --- a/output/Makefile.am +++ b/output/Makefile.am @@ -27,6 +27,7 @@ libsigrokoutput_la_SOURCES = \ output_vcd.c \ output_ols.c \ output_gnuplot.c \ + output_chronovu_la8.c \ output.c # Temporarily disabled: output_analog.c diff --git a/output/output.c b/output/output.c index 6664ed72..d99210d4 100644 --- a/output/output.c +++ b/output/output.c @@ -26,6 +26,7 @@ extern struct sr_output_format output_binary; extern struct sr_output_format output_vcd; extern struct sr_output_format output_ols; extern struct sr_output_format output_gnuplot; +extern struct sr_output_format output_chronovu_la8; /* extern struct sr_output_format output_analog_bits; */ /* extern struct sr_output_format output_analog_gnuplot; */ @@ -37,6 +38,7 @@ static struct sr_output_format *output_module_list[] = { &output_vcd, &output_ols, &output_gnuplot, + &output_chronovu_la8, /* &output_analog_bits, */ /* &output_analog_gnuplot, */ NULL, diff --git a/output/output_chronovu_la8.c b/output/output_chronovu_la8.c new file mode 100644 index 00000000..adec2dfa --- /dev/null +++ b/output/output_chronovu_la8.c @@ -0,0 +1,241 @@ +/* + * This file is part of the sigrok project. + * + * Copyright (C) 2011 Uwe Hermann + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include + +struct context { + unsigned int num_enabled_probes; + unsigned int unitsize; + char *probelist[SR_MAX_NUM_PROBES + 1]; + uint64_t trigger_point; + uint64_t samplerate; +}; + +/** + * Check if the given samplerate is supported by the LA8 hardware. + * + * @param samplerate The samplerate (in Hz) to check. + * @return 1 if the samplerate is supported/valid, 0 otherwise. + */ +static int is_valid_samplerate(uint64_t samplerate) +{ + unsigned int i; + + for (i = 0; i < 255; i++) { + if (samplerate == (SR_MHZ(100) / (i + 1))) + return 1; + } + + g_warning("la8 out: %s: invalid samplerate (%" PRIu64 "Hz)", + __func__, samplerate); + + return 0; +} + +/** + * Convert a samplerate (in Hz) to the 'divcount' value the LA8 wants. + * + * LA8 hardware: sample period = (divcount + 1) * 10ns. + * Min. value for divcount: 0x00 (10ns sample period, 100MHz samplerate). + * Max. value for divcount: 0xfe (2550ns sample period, 392.15kHz samplerate). + * + * @param samplerate The samplerate in Hz. + * @return The divcount value as needed by the hardware, or 0xff upon errors. + */ +static uint8_t samplerate_to_divcount(uint64_t samplerate) +{ + if (samplerate == 0) { + g_warning("la8 out: %s: samplerate was 0", __func__); + return 0xff; + } + + if (!is_valid_samplerate(samplerate)) { + g_warning("la8 out: %s: can't get divcount, samplerate invalid", + __func__); + return 0xff; + } + + return (SR_MHZ(100) / samplerate) - 1; +} + +static int init(struct sr_output *o) +{ + struct context *ctx; + struct sr_probe *probe; + GSList *l; + int num_probes; + uint64_t samplerate; + + if (!o) { + g_warning("la8 out: %s: o was NULL", __func__); + return SR_ERR_ARG; + } + + if (!o->device) { + g_warning("la8 out: %s: o->device was NULL", __func__); + return SR_ERR_ARG; + } + + if (!o->device->plugin) { + g_warning("la8 out: %s: o->device->plugin was NULL", __func__); + return SR_ERR_ARG; + } + + if (!(ctx = calloc(1, sizeof(struct context)))) { + g_warning("la8 out: %s: ctx calloc failed", __func__); + return SR_ERR_MALLOC; + } + + o->internal = ctx; + + /* Get the number of probes, their names, and the unitsize. */ + /* TODO: Error handling. */ + for (l = o->device->probes; l; l = l->next) { + probe = l->data; + if (!probe->enabled) + continue; + ctx->probelist[ctx->num_enabled_probes++] = probe->name; + } + ctx->probelist[ctx->num_enabled_probes] = 0; + ctx->unitsize = (ctx->num_enabled_probes + 7) / 8; + + num_probes = g_slist_length(o->device->probes); + + if (sr_device_has_hwcap(o->device, SR_HWCAP_SAMPLERATE)) { + samplerate = *((uint64_t *) o->device->plugin->get_device_info( + o->device->plugin_index, SR_DI_CUR_SAMPLERATE)); + /* TODO: Error checks. */ + } else { + samplerate = 0; /* TODO: Error or set some value? */ + } + ctx->samplerate = samplerate; + + return 0; /* TODO: SR_OK? */ +} + +static int event(struct sr_output *o, int event_type, char **data_out, + uint64_t *length_out) +{ + struct context *ctx; + char *outbuf; + + if (!o) { + g_warning("la8 out: %s: o was NULL", __func__); + return SR_ERR_ARG; + } + + if (!(ctx = o->internal)) { + g_warning("la8 out: %s: o->internal was NULL", __func__); + return SR_ERR_ARG; + } + + if (!data_out) { + g_warning("la8 out: %s: data_out was NULL", __func__); + return SR_ERR_ARG; + } + + switch (event_type) { + case SR_DF_TRIGGER: + g_debug("la8 out: %s: SR_DF_TRIGGER event", __func__); + /* Save the trigger point for later (SR_DF_END). */ + ctx->trigger_point = 0; /* TODO: Store _actual_ value. */ + break; + case SR_DF_END: + g_debug("la8 out: %s: SR_DF_END event", __func__); + if (!(outbuf = malloc(4 + 1))) { + g_warning("la8 out: %s: outbuf malloc failed", + __func__); + return SR_ERR_MALLOC; + } + + /* One byte for the 'divcount' value. */ + outbuf[0] = samplerate_to_divcount(ctx->samplerate); + // if (outbuf[0] == 0xff) { + // g_warning("la8 out: %s: invalid divcount", __func__); + // return SR_ERR; + // } + + /* Four bytes (little endian) for the trigger point. */ + outbuf[1] = (ctx->trigger_point >> 0) & 0xff; + outbuf[2] = (ctx->trigger_point >> 8) & 0xff; + outbuf[3] = (ctx->trigger_point >> 16) & 0xff; + outbuf[4] = (ctx->trigger_point >> 24) & 0xff; + + *data_out = outbuf; + *length_out = 4 + 1; + free(o->internal); + o->internal = NULL; + break; + default: + g_warning("la8 out: %s: unsupported event type: %d", __func__, + event_type); + *data_out = NULL; + *length_out = 0; + break; + } + + return SR_OK; +} + +static int data(struct sr_output *o, const char *data_in, uint64_t length_in, + char **data_out, uint64_t *length_out) +{ + struct context *ctx; + char *outbuf; + + if (!o) { + g_warning("la8 out: %s: o was NULL", __func__); + return SR_ERR_ARG; + } + + if (!(ctx = o->internal)) { + g_warning("la8 out: %s: o->internal was NULL", __func__); + return SR_ERR_ARG; + } + + if (!data_in) { + g_warning("la8 out: %s: data_in was NULL", __func__); + return SR_ERR_ARG; + } + + if (!(outbuf = calloc(1, length_in))) { + g_warning("la8 out: %s: outbuf calloc failed", __func__); + return SR_ERR_MALLOC; + } + + memcpy(outbuf, data_in, length_in); + + *data_out = outbuf; + *length_out = length_in; + + return SR_OK; +} + +struct sr_output_format output_chronovu_la8 = { + .id = "chronovu-la8", + .description = "ChronoVu LA8", + .df_type = SR_DF_LOGIC, + .init = init, + .data = data, + .event = event, +};