From: Uwe Hermann Date: Sun, 30 Mar 2014 20:40:27 +0000 (+0200) Subject: la8: Cleanups, cosmetics, simplifications. X-Git-Tag: libsigrok-0.3.0~98 X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=b172c1301e183646fbe9a2b7e096d9c7ee8e2458;p=libsigrok.git la8: Cleanups, cosmetics, simplifications. Also, make some LA8 references more generic in preparation of LA16 support. --- diff --git a/hardware/chronovu-la8/api.c b/hardware/chronovu-la8/api.c index 896ee74a..fb364502 100644 --- a/hardware/chronovu-la8/api.c +++ b/hardware/chronovu-la8/api.c @@ -1,7 +1,7 @@ /* * This file is part of the libsigrok project. * - * Copyright (C) 2011-2012 Uwe Hermann + * Copyright (C) 2011-2014 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 @@ -18,11 +18,6 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ -#include -#include -#include -#include "libsigrok.h" -#include "libsigrok-internal.h" #include "protocol.h" SR_PRIV struct sr_dev_driver chronovu_la8_driver_info; @@ -34,10 +29,9 @@ static struct sr_dev_driver *di = &chronovu_la8_driver_info; * Min: 1 sample per 0.01us -> sample time is 0.084s, samplerate 100MHz * Max: 1 sample per 2.55us -> sample time is 21.391s, samplerate 392.15kHz */ -SR_PRIV uint64_t chronovu_la8_samplerates[255] = { 0 }; +SR_PRIV uint64_t cv_samplerates[255] = { 0 }; -/* Note: Continuous sampling is not supported by the hardware. */ -SR_PRIV const int32_t chronovu_la8_hwcaps[] = { +SR_PRIV const int32_t cv_hwcaps[] = { SR_CONF_LOGIC_ANALYZER, SR_CONF_SAMPLERATE, SR_CONF_LIMIT_MSEC, /* TODO: Not yet implemented. */ @@ -53,13 +47,12 @@ static const uint16_t usb_pids[] = { 0x8867, }; -/* Function prototypes. */ static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data); static void clear_helper(void *priv) { struct dev_context *devc; - + devc = priv; ftdi_free(devc->ftdic); @@ -93,10 +86,7 @@ static GSList *scan(GSList *options) devices = NULL; /* Allocate memory for our private device context. */ - if (!(devc = g_try_malloc(sizeof(struct dev_context)))) { - sr_err("Device context malloc failed."); - goto err_free_nothing; - } + devc = g_try_malloc(sizeof(struct dev_context)); /* Set some sane defaults. */ devc->ftdic = NULL; @@ -117,13 +107,13 @@ static GSList *scan(GSList *options) /* Allocate memory where we'll store the de-mangled data. */ if (!(devc->final_buf = g_try_malloc(SDRAM_SIZE))) { - sr_err("final_buf malloc failed."); + sr_err("Failed to allocate memory for sample buffer."); goto err_free_devc; } /* Allocate memory for the FTDI context (ftdic) and initialize it. */ if (!(devc->ftdic = ftdi_new())) { - sr_err("%s: ftdi_new failed.", __func__); + sr_err("Failed to initialize libftdi."); goto err_free_final_buf; } @@ -147,15 +137,15 @@ static GSList *scan(GSList *options) sdi = sr_dev_inst_new(0, SR_ST_INITIALIZING, USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION); if (!sdi) { - sr_err("%s: sr_dev_inst_new failed.", __func__); + sr_err("Failed to create device instance."); goto err_close_ftdic; } sdi->driver = di; sdi->priv = devc; - for (i = 0; chronovu_la8_channel_names[i]; i++) { + for (i = 0; cv_channel_names[i]; i++) { if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE, - chronovu_la8_channel_names[i]))) + cv_channel_names[i]))) return NULL; sdi->channels = g_slist_append(sdi->channels, ch); } @@ -164,12 +154,12 @@ static GSList *scan(GSList *options) drvc->instances = g_slist_append(drvc->instances, sdi); /* Close device. We'll reopen it again when we need it. */ - (void) la8_close(devc); /* Log, but ignore errors. */ + (void) cv_close(devc); /* Log, but ignore errors. */ return devices; err_close_ftdic: - (void) la8_close(devc); /* Log, but ignore errors. */ + (void) cv_close(devc); /* Log, but ignore errors. */ err_free_ftdic: ftdi_free(devc->ftdic); /* NOT free() or g_free()! */ err_free_final_buf: @@ -191,10 +181,8 @@ static int dev_open(struct sr_dev_inst *sdi) struct dev_context *devc; int ret; - if (!(devc = sdi->priv)) { - sr_err("%s: sdi->priv was NULL.", __func__); + if (!(devc = sdi->priv)) return SR_ERR_BUG; - } sr_dbg("Opening LA8 device (%04x:%04x).", USB_VENDOR_ID, devc->usb_pid); @@ -202,27 +190,27 @@ static int dev_open(struct sr_dev_inst *sdi) /* Open the device. */ if ((ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, devc->usb_pid, USB_DESCRIPTION, NULL)) < 0) { - sr_err("%s: ftdi_usb_open_desc: (%d) %s", - __func__, ret, ftdi_get_error_string(devc->ftdic)); - (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */ + sr_err("Failed to open FTDI device (%d): %s.", + ret, ftdi_get_error_string(devc->ftdic)); + (void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */ return SR_ERR; } sr_dbg("Device opened successfully."); /* Purge RX/TX buffers in the FTDI chip. */ if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) { - sr_err("%s: ftdi_usb_purge_buffers: (%d) %s", - __func__, ret, ftdi_get_error_string(devc->ftdic)); - (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */ + sr_err("Failed to purge FTDI buffers (%d): %s.", + ret, ftdi_get_error_string(devc->ftdic)); + (void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */ goto err_dev_open_close_ftdic; } sr_dbg("FTDI buffers purged successfully."); /* Enable flow control in the FTDI chip. */ if ((ret = ftdi_setflowctrl(devc->ftdic, SIO_RTS_CTS_HS)) < 0) { - sr_err("%s: ftdi_setflowcontrol: (%d) %s", - __func__, ret, ftdi_get_error_string(devc->ftdic)); - (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */ + sr_err("Failed to enable FTDI flow control (%d): %s.", + ret, ftdi_get_error_string(devc->ftdic)); + (void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */ goto err_dev_open_close_ftdic; } sr_dbg("FTDI flow control enabled successfully."); @@ -235,7 +223,7 @@ static int dev_open(struct sr_dev_inst *sdi) return SR_OK; err_dev_open_close_ftdic: - (void) la8_close(devc); /* Log, but ignore errors. */ + (void) cv_close(devc); /* Log, but ignore errors. */ return SR_ERR; } @@ -247,7 +235,7 @@ static int dev_close(struct sr_dev_inst *sdi) if (sdi->status == SR_ST_ACTIVE) { sr_dbg("Status ACTIVE, closing device."); - (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */ + (void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */ } else { sr_spew("Status not ACTIVE, nothing to do."); } @@ -271,13 +259,9 @@ static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi, switch (id) { case SR_CONF_SAMPLERATE: - if (sdi) { - devc = sdi->priv; - *data = g_variant_new_uint64(devc->cur_samplerate); - sr_spew("%s: Returning samplerate: %" PRIu64 "Hz.", - __func__, devc->cur_samplerate); - } else - return SR_ERR; + if (!sdi || !(devc = sdi->priv)) + return SR_ERR_BUG; + *data = g_variant_new_uint64(devc->cur_samplerate); break; default: return SR_ERR_NA; @@ -296,34 +280,23 @@ static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi, if (sdi->status != SR_ST_ACTIVE) return SR_ERR_DEV_CLOSED; - if (!(devc = sdi->priv)) { - sr_err("%s: sdi->priv was NULL.", __func__); + if (!(devc = sdi->priv)) return SR_ERR_BUG; - } switch (id) { case SR_CONF_SAMPLERATE: - if (set_samplerate(sdi, g_variant_get_uint64(data)) == SR_ERR) { - sr_err("%s: setting samplerate failed.", __func__); + if (set_samplerate(sdi, g_variant_get_uint64(data)) < 0) return SR_ERR; - } - sr_dbg("SAMPLERATE = %" PRIu64, devc->cur_samplerate); break; case SR_CONF_LIMIT_MSEC: - if (g_variant_get_uint64(data) == 0) { - sr_err("%s: LIMIT_MSEC can't be 0.", __func__); - return SR_ERR; - } + if (g_variant_get_uint64(data) == 0) + return SR_ERR_ARG; devc->limit_msec = g_variant_get_uint64(data); - sr_dbg("LIMIT_MSEC = %" PRIu64, devc->limit_msec); break; case SR_CONF_LIMIT_SAMPLES: - if (g_variant_get_uint64(data) < MIN_NUM_SAMPLES) { - sr_err("%s: LIMIT_SAMPLES too small.", __func__); - return SR_ERR; - } + if (g_variant_get_uint64(data) == 0) + return SR_ERR_ARG; devc->limit_samples = g_variant_get_uint64(data); - sr_dbg("LIMIT_SAMPLES = %" PRIu64, devc->limit_samples); break; default: return SR_ERR_NA; @@ -344,16 +317,14 @@ static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi, switch (key) { case SR_CONF_DEVICE_OPTIONS: *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, - chronovu_la8_hwcaps, - ARRAY_SIZE(chronovu_la8_hwcaps), + cv_hwcaps, ARRAY_SIZE(cv_hwcaps), sizeof(int32_t)); break; case SR_CONF_SAMPLERATE: - fill_supported_samplerates_if_needed(); + cv_fill_samplerates_if_needed(); g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}")); gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), - chronovu_la8_samplerates, - ARRAY_SIZE(chronovu_la8_samplerates), + cv_samplerates, ARRAY_SIZE(cv_samplerates), sizeof(uint64_t)); g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar); *data = g_variant_builder_end(&gvb); @@ -383,23 +354,23 @@ static int receive_data(int fd, int revents, void *cb_data) (void)revents; if (!(sdi = cb_data)) { - sr_err("%s: cb_data was NULL.", __func__); + sr_err("cb_data was NULL."); return FALSE; } if (!(devc = sdi->priv)) { - sr_err("%s: sdi->priv was NULL.", __func__); + sr_err("sdi->priv was NULL."); return FALSE; } if (!devc->ftdic) { - sr_err("%s: devc->ftdic was NULL.", __func__); + sr_err("devc->ftdic was NULL."); return FALSE; } /* Get one block of data. */ - if ((ret = la8_read_block(devc)) < 0) { - sr_err("%s: la8_read_block error: %d.", __func__, ret); + if ((ret = cv_read_block(devc)) < 0) { + sr_err("Failed to read data block: %d.", ret); dev_acquisition_stop(sdi, sdi); return FALSE; } @@ -414,7 +385,7 @@ static int receive_data(int fd, int revents, void *cb_data) /* All data was received and demangled, send it to the session bus. */ for (i = 0; i < NUM_BLOCKS; i++) - send_block_to_session_bus(devc, i); + cv_send_block_to_session_bus(devc, i); dev_acquisition_stop(sdi, sdi); @@ -431,22 +402,22 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) return SR_ERR_DEV_CLOSED; if (!(devc = sdi->priv)) { - sr_err("%s: sdi->priv was NULL.", __func__); + sr_err("sdi->priv was NULL."); return SR_ERR_BUG; } if (!devc->ftdic) { - sr_err("%s: devc->ftdic was NULL.", __func__); + sr_err("devc->ftdic was NULL."); return SR_ERR_BUG; } - devc->divcount = samplerate_to_divcount(devc->cur_samplerate); + devc->divcount = cv_samplerate_to_divcount(devc->cur_samplerate); if (devc->divcount == 0xff) { - sr_err("%s: Invalid divcount/samplerate.", __func__); + sr_err("Invalid divcount/samplerate."); return SR_ERR; } - if (configure_channels(sdi) != SR_OK) { + if (cv_configure_channels(sdi) != SR_OK) { sr_err("Failed to configure channels."); return SR_ERR; } @@ -458,7 +429,7 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) buf[3] = devc->trigger_mask; /* Start acquisition. */ - bytes_written = la8_write(devc, buf, 4); + bytes_written = cv_write(devc, buf, 4); if (bytes_written < 0) { sr_err("Acquisition failed to start: %d.", bytes_written); @@ -481,7 +452,7 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) devc->block_counter = 0; devc->trigger_found = 0; - /* Hook up a dummy handler to receive data from the LA8. */ + /* Hook up a dummy handler to receive data from the device. */ sr_source_add(-1, G_IO_IN, 0, receive_data, (void *)sdi); return SR_OK; diff --git a/hardware/chronovu-la8/protocol.c b/hardware/chronovu-la8/protocol.c index 6f8738bc..3a50fe61 100644 --- a/hardware/chronovu-la8/protocol.c +++ b/hardware/chronovu-la8/protocol.c @@ -1,7 +1,7 @@ /* * This file is part of the libsigrok project. * - * Copyright (C) 2011-2012 Uwe Hermann + * Copyright (C) 2011-2014 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 @@ -18,43 +18,39 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ -#include -#include -#include "libsigrok.h" -#include "libsigrok-internal.h" #include "protocol.h" /* Channels are numbered 0-7. */ -SR_PRIV const char *chronovu_la8_channel_names[NUM_CHANNELS + 1] = { +SR_PRIV const char *cv_channel_names[NUM_CHANNELS + 1] = { "0", "1", "2", "3", "4", "5", "6", "7", NULL, }; -SR_PRIV void fill_supported_samplerates_if_needed(void) +SR_PRIV void cv_fill_samplerates_if_needed(void) { int i; - if (chronovu_la8_samplerates[0] != 0) + if (cv_samplerates[0] != 0) return; for (i = 0; i < 255; i++) - chronovu_la8_samplerates[254 - i] = SR_MHZ(100) / (i + 1); + cv_samplerates[254 - i] = SR_MHZ(100) / (i + 1); } /** - * Check if the given samplerate is supported by the LA8 hardware. + * Check if the given samplerate is supported by the hardware. * * @param samplerate The samplerate (in Hz) to check. * @return 1 if the samplerate is supported/valid, 0 otherwise. */ -SR_PRIV int is_valid_samplerate(uint64_t samplerate) +static int is_valid_samplerate(uint64_t samplerate) { int i; - fill_supported_samplerates_if_needed(); + cv_fill_samplerates_if_needed(); for (i = 0; i < 255; i++) { - if (chronovu_la8_samplerates[i] == samplerate) + if (cv_samplerates[i] == samplerate) return 1; } @@ -64,7 +60,7 @@ SR_PRIV int is_valid_samplerate(uint64_t samplerate) } /** - * Convert a samplerate (in Hz) to the 'divcount' value the LA8 wants. + * Convert a samplerate (in Hz) to the 'divcount' value the device wants. * * LA8 hardware: sample period = (divcount + 1) * 10ns. * Min. value for divcount: 0x00 (10ns sample period, 100MHz samplerate). @@ -73,15 +69,15 @@ SR_PRIV int is_valid_samplerate(uint64_t samplerate) * @param samplerate The samplerate in Hz. * @return The divcount value as needed by the hardware, or 0xff upon errors. */ -SR_PRIV uint8_t samplerate_to_divcount(uint64_t samplerate) +SR_PRIV uint8_t cv_samplerate_to_divcount(uint64_t samplerate) { if (samplerate == 0) { - sr_err("%s: samplerate was 0.", __func__); + sr_err("Can't convert invalid samplerate of 0 Hz."); return 0xff; } if (!is_valid_samplerate(samplerate)) { - sr_err("%s: Can't get divcount, samplerate invalid.", __func__); + sr_err("Can't get divcount, samplerate invalid."); return 0xff; } @@ -89,85 +85,73 @@ SR_PRIV uint8_t samplerate_to_divcount(uint64_t samplerate) } /** - * Write data of a certain length to the LA8's FTDI device. + * Write data of a certain length to the FTDI device. * * @param devc The struct containing private per-device-instance data. Must not - * be NULL. devc->ftdic must not be NULL either. + * be NULL. devc->ftdic must not be NULL either. * @param buf The buffer containing the data to write. Must not be NULL. - * @param size The number of bytes to write. Must be >= 0. + * @param size The number of bytes to write. Must be > 0. + * * @return The number of bytes written, or a negative value upon errors. */ -SR_PRIV int la8_write(struct dev_context *devc, uint8_t *buf, int size) +SR_PRIV int cv_write(struct dev_context *devc, uint8_t *buf, int size) { int bytes_written; - /* Note: Caller checked that devc and devc->ftdic != NULL. */ + /* Note: Caller ensures devc/devc->ftdic/buf != NULL and size > 0. */ - if (!buf) { - sr_err("%s: buf was NULL.", __func__); + if (!buf) return SR_ERR_ARG; - } - if (size < 0) { - sr_err("%s: size was < 0.", __func__); + if (size < 0) return SR_ERR_ARG; - } bytes_written = ftdi_write_data(devc->ftdic, buf, size); if (bytes_written < 0) { - sr_err("%s: ftdi_write_data: (%d) %s.", __func__, + sr_err("Failed to write data (%d): %s.", bytes_written, ftdi_get_error_string(devc->ftdic)); - (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */ + (void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */ } else if (bytes_written != size) { - sr_err("%s: bytes to write: %d, bytes written: %d.", - __func__, size, bytes_written); - (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */ + sr_err("Failed to write data, only %d/%d bytes written.", + size, bytes_written); + (void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */ } return bytes_written; } /** - * Read a certain amount of bytes from the LA8's FTDI device. + * Read a certain amount of bytes from the FTDI device. * * @param devc The struct containing private per-device-instance data. Must not - * be NULL. devc->ftdic must not be NULL either. + * be NULL. devc->ftdic must not be NULL either. * @param buf The buffer where the received data will be stored. Must not * be NULL. * @param size The number of bytes to read. Must be >= 1. + * * @return The number of bytes read, or a negative value upon errors. */ -SR_PRIV int la8_read(struct dev_context *devc, uint8_t *buf, int size) +static int cv_read(struct dev_context *devc, uint8_t *buf, int size) { int bytes_read; - /* Note: Caller checked that devc and devc->ftdic != NULL. */ - - if (!buf) { - sr_err("%s: buf was NULL.", __func__); - return SR_ERR_ARG; - } - - if (size <= 0) { - sr_err("%s: size was <= 0.", __func__); - return SR_ERR_ARG; - } + /* Note: Caller ensures devc/devc->ftdic/buf != NULL and size > 0. */ bytes_read = ftdi_read_data(devc->ftdic, buf, size); if (bytes_read < 0) { - sr_err("%s: ftdi_read_data: (%d) %s.", __func__, + sr_err("Failed to read data (%d): %s.", bytes_read, ftdi_get_error_string(devc->ftdic)); } else if (bytes_read != size) { - // sr_err("%s: Bytes to read: %d, bytes read: %d.", - // __func__, size, bytes_read); + // sr_err("Failed to read data, only %d/%d bytes read.", + // bytes_read, size); } return bytes_read; } -SR_PRIV int la8_close(struct dev_context *devc) +SR_PRIV int cv_close(struct dev_context *devc) { int ret; @@ -190,31 +174,29 @@ SR_PRIV int la8_close(struct dev_context *devc) } /** - * Close the ChronoVu LA8 USB port and reset the LA8 sequencer logic. + * Close the USB port and reset the sequencer logic. * * @param devc The struct containing private per-device-instance data. * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments. */ -SR_PRIV int la8_close_usb_reset_sequencer(struct dev_context *devc) +SR_PRIV int cv_close_usb_reset_sequencer(struct dev_context *devc) { - /* Magic sequence of bytes for resetting the LA8 sequencer logic. */ + /* Magic sequence of bytes for resetting the sequencer logic. */ uint8_t buf[8] = {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01}; int ret; - if (!devc) { - sr_err("%s: devc was NULL.", __func__); + if (!devc) return SR_ERR_ARG; - } if (!devc->ftdic) { - sr_err("%s: devc->ftdic was NULL.", __func__); + sr_err("devc->ftdic was NULL."); return SR_ERR_ARG; } if (devc->ftdic->usb_dev) { - /* Reset the LA8 sequencer logic, then wait 100ms. */ + /* Reset the sequencer logic, then wait 100ms. */ sr_dbg("Resetting sequencer logic."); - (void) la8_write(devc, buf, 8); /* Ignore errors. */ + (void) cv_write(devc, buf, 8); /* Ignore errors. */ g_usleep(100 * 1000); /* Purge FTDI buffers, then reset and close the FTDI device. */ @@ -240,14 +222,14 @@ SR_PRIV int la8_close_usb_reset_sequencer(struct dev_context *devc) } /** - * Reset the ChronoVu LA8. + * Reset the ChronoVu device. * - * The LA8 must be reset after a failed read/write operation or upon timeouts. + * A reset is required after a failed read/write operation or upon timeouts. * * @param devc The struct containing private per-device-instance data. * @return SR_OK upon success, SR_ERR upon failure. */ -SR_PRIV int la8_reset(struct dev_context *devc) +static int cv_reset(struct dev_context *devc) { uint8_t buf[BS]; time_t done, now; @@ -271,20 +253,20 @@ SR_PRIV int la8_reset(struct dev_context *devc) */ done = 20 + time(NULL); do { - /* TODO: Ignore errors? Check for < 0 at least! */ - bytes_read = la8_read(devc, (uint8_t *)&buf, BS); + /* Try to read bytes until none are left (or errors occur). */ + bytes_read = cv_read(devc, (uint8_t *)&buf, BS); now = time(NULL); } while ((done > now) && (bytes_read > 0)); - /* Reset the LA8 sequencer logic and close the USB port. */ - (void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */ + /* Reset the sequencer logic and close the USB port. */ + (void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */ sr_dbg("Device reset finished."); return SR_OK; } -SR_PRIV int configure_channels(const struct sr_dev_inst *sdi) +SR_PRIV int cv_configure_channels(const struct sr_dev_inst *sdi) { struct dev_context *devc; const struct sr_channel *ch; @@ -343,7 +325,7 @@ SR_PRIV int configure_channels(const struct sr_dev_inst *sdi) return SR_OK; } -SR_PRIV int set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate) +SR_PRIV int cv_set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate) { struct dev_context *devc; @@ -353,11 +335,14 @@ SR_PRIV int set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate) sr_spew("Trying to set samplerate to %" PRIu64 "Hz.", samplerate); - fill_supported_samplerates_if_needed(); + cv_fill_samplerates_if_needed(); /* Check if this is a samplerate supported by the hardware. */ - if (!is_valid_samplerate(samplerate)) + if (!is_valid_samplerate(samplerate)) { + sr_dbg("Failed to set invalid samplerate (%" PRIu64 "Hz).", + samplerate); return SR_ERR; + } /* Set the new samplerate. */ devc->cur_samplerate = samplerate; @@ -368,13 +353,14 @@ SR_PRIV int set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate) } /** - * Get a block of data from the LA8. + * Get a block of data from the device. * * @param devc The struct containing private per-device-instance data. Must not - * be NULL. devc->ftdic must not be NULL either. + * be NULL. devc->ftdic must not be NULL either. + * * @return SR_OK upon success, or SR_ERR upon errors. */ -SR_PRIV int la8_read_block(struct dev_context *devc) +SR_PRIV int cv_read_block(struct dev_context *devc) { int i, byte_offset, m, mi, p, index, bytes_read; time_t now; @@ -383,13 +369,13 @@ SR_PRIV int la8_read_block(struct dev_context *devc) sr_spew("Reading block %d.", devc->block_counter); - bytes_read = la8_read(devc, devc->mangled_buf, BS); + bytes_read = cv_read(devc, devc->mangled_buf, BS); /* If first block read got 0 bytes, retry until success or timeout. */ if ((bytes_read == 0) && (devc->block_counter == 0)) { do { sr_spew("Reading block 0 (again)."); - bytes_read = la8_read(devc, devc->mangled_buf, BS); + bytes_read = cv_read(devc, devc->mangled_buf, BS); /* TODO: How to handle read errors here? */ now = time(NULL); } while ((devc->done > now) && (bytes_read == 0)); @@ -398,7 +384,7 @@ SR_PRIV int la8_read_block(struct dev_context *devc) /* Check if block read was successful or a timeout occured. */ if (bytes_read != BS) { sr_err("Trigger timed out. Bytes read: %d.", bytes_read); - (void) la8_reset(devc); /* Ignore errors. */ + (void) cv_reset(devc); /* Ignore errors. */ return SR_ERR; } @@ -417,7 +403,7 @@ SR_PRIV int la8_read_block(struct dev_context *devc) return SR_OK; } -SR_PRIV void send_block_to_session_bus(struct dev_context *devc, int block) +SR_PRIV void cv_send_block_to_session_bus(struct dev_context *devc, int block) { int i; uint8_t sample, expected_sample; diff --git a/hardware/chronovu-la8/protocol.h b/hardware/chronovu-la8/protocol.h index 5136b770..b44ca816 100644 --- a/hardware/chronovu-la8/protocol.h +++ b/hardware/chronovu-la8/protocol.h @@ -1,7 +1,7 @@ /* * This file is part of the libsigrok project. * - * Copyright (C) 2011-2012 Uwe Hermann + * Copyright (C) 2011-2014 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 @@ -38,7 +38,6 @@ #define NUM_CHANNELS 8 #define TRIGGER_TYPE "01" #define SDRAM_SIZE (8 * 1024 * 1024) -#define MIN_NUM_SAMPLES 1 #define MAX_NUM_SAMPLES SDRAM_SIZE #define BS 4096 /* Block size */ @@ -91,34 +90,31 @@ struct dev_context { /** Tells us whether an SR_DF_TRIGGER packet was already sent. */ int trigger_found; - /** TODO */ + /** Used for keeping track how much time has passed. */ time_t done; /** Counter/index for the data block to be read. */ int block_counter; - /** The divcount value (determines the sample period) for the LA8. */ + /** The divcount value (determines the sample period). */ uint8_t divcount; - /** This ChronoVu LA8's USB PID (multiple versions exist). */ + /** This ChronoVu device's USB PID. */ uint16_t usb_pid; }; /* protocol.c */ -extern const int32_t chronovu_la8_hwcaps[]; -extern uint64_t chronovu_la8_samplerates[]; -extern SR_PRIV const char *chronovu_la8_channel_names[]; -SR_PRIV void fill_supported_samplerates_if_needed(void); -SR_PRIV int is_valid_samplerate(uint64_t samplerate); -SR_PRIV uint8_t samplerate_to_divcount(uint64_t samplerate); -SR_PRIV int la8_write(struct dev_context *devc, uint8_t *buf, int size); -SR_PRIV int la8_read(struct dev_context *devc, uint8_t *buf, int size); -SR_PRIV int la8_close(struct dev_context *devc); -SR_PRIV int la8_close_usb_reset_sequencer(struct dev_context *devc); -SR_PRIV int la8_reset(struct dev_context *devc); -SR_PRIV int configure_channels(const struct sr_dev_inst *sdi); -SR_PRIV int set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate); -SR_PRIV int la8_read_block(struct dev_context *devc); -SR_PRIV void send_block_to_session_bus(struct dev_context *devc, int block); +extern const int32_t cv_hwcaps[]; +extern uint64_t cv_samplerates[]; +extern SR_PRIV const char *cv_channel_names[]; +SR_PRIV void cv_fill_samplerates_if_needed(void); +SR_PRIV uint8_t cv_samplerate_to_divcount(uint64_t samplerate); +SR_PRIV int cv_write(struct dev_context *devc, uint8_t *buf, int size); +SR_PRIV int cv_close(struct dev_context *devc); +SR_PRIV int cv_close_usb_reset_sequencer(struct dev_context *devc); +SR_PRIV int cv_configure_channels(const struct sr_dev_inst *sdi); +SR_PRIV int cv_set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate); +SR_PRIV int cv_read_block(struct dev_context *devc); +SR_PRIV void cv_send_block_to_session_bus(struct dev_context *devc, int block); #endif