X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Fchronovu-la8%2Fchronovu-la8.c;h=67f0ecea6ab9ebd726f48429a48d8288b8765318;hb=f36cbf60cbd43be46ede083265549068db21f4b6;hp=44ab838421269995cf3a93c0724c130041efd0a7;hpb=309397702f747ea6326492d841a31fddd2d76a9f;p=libsigrok.git diff --git a/hardware/chronovu-la8/chronovu-la8.c b/hardware/chronovu-la8/chronovu-la8.c index 44ab8384..67f0ecea 100644 --- a/hardware/chronovu-la8/chronovu-la8.c +++ b/hardware/chronovu-la8/chronovu-la8.c @@ -20,6 +20,7 @@ #include #include +#include #include #include @@ -35,6 +36,9 @@ #define SDRAM_SIZE (8 * 1024 * 1024) #define MIN_NUM_SAMPLES 1 +#define BS 4096 /* Block size */ +#define NUM_BLOCKS 2048 /* Number of blocks */ + static GSList *device_instances = NULL; struct la8 { @@ -50,17 +54,14 @@ struct la8 { /** The current sampling limit (in number of samples). */ uint64_t limit_samples; - /** The number of probes. */ - int num_probes; - /** TODO */ gpointer session_id; /** - * An 8MB buffer containing the (mangled) samples from the device. + * A buffer containing some (mangled) samples from the device. * Format: Pretty mangled-up (due to hardware reasons), see code. */ - uint8_t *mangled_buf; + uint8_t mangled_buf[BS]; /** * An 8MB buffer where we'll store the de-mangled samples. @@ -84,10 +85,13 @@ struct la8 { /** Time (in seconds) before the trigger times out. */ uint64_t trigger_timeout; + /** Tells us whether an SR_DF_TRIGGER packet was already sent. */ + int trigger_found; + /** TODO */ time_t done; - /** Counter/index for the data block (0..2047) to be read. */ + /** Counter/index for the data block to be read. */ int block_counter; /** The divcount value (determines the sample period) for the LA8. */ @@ -362,7 +366,7 @@ static int la8_close_usb_reset_sequencer(struct la8 *la8) */ static int la8_reset(struct la8 *la8) { - uint8_t buf[4096]; + uint8_t buf[BS]; time_t done, now; int bytes_read; @@ -385,7 +389,7 @@ static int la8_reset(struct la8 *la8) done = 20 + time(NULL); do { /* TODO: Ignore errors? Check for < 0 at least! */ - bytes_read = la8_read(la8, (uint8_t *)&buf, 4096); + bytes_read = la8_read(la8, (uint8_t *)&buf, BS); now = time(NULL); } while ((done > now) && (bytes_read > 0)); @@ -477,29 +481,22 @@ static int hw_init(const char *deviceinfo) la8->cur_samplerate = SR_MHZ(100); /* 100MHz == max. samplerate */ la8->limit_msec = 0; la8->limit_samples = 0; - la8->num_probes = NUM_PROBES; la8->session_id = NULL; - la8->mangled_buf = NULL; + memset(la8->mangled_buf, 0, BS); la8->final_buf = NULL; la8->trigger_pattern = 0x00; /* Value irrelevant, see trigger_mask. */ la8->trigger_mask = 0x00; /* All probes are "don't care". */ la8->trigger_timeout = 10; /* Default to 10s trigger timeout. */ + la8->trigger_found = 0; la8->done = 0; la8->block_counter = 0; la8->divcount = 0; /* 10ns sample period == 100MHz samplerate */ - /* Allocate memory for the raw (mangled) data from the LA8. */ - if (!(la8->mangled_buf = g_try_malloc(SDRAM_SIZE))) { - sr_err("la8: %s: mangled_buf malloc failed", __func__); - ret = SR_ERR_MALLOC; - goto err_free_la8; - } - /* Allocate memory where we'll store the de-mangled data. */ if (!(la8->final_buf = g_try_malloc(SDRAM_SIZE))) { sr_err("la8: %s: final_buf malloc failed", __func__); ret = SR_ERR_MALLOC; - goto err_free_mangled_buf; + goto err_free_la8; } /* Allocate memory for the FTDI context (ftdic) and initialize it. */ @@ -547,8 +544,6 @@ err_free_ftdic: free(la8->ftdic); /* NOT g_free()! */ err_free_final_buf: g_free(la8->final_buf); -err_free_mangled_buf: - g_free(la8->mangled_buf); err_free_la8: g_free(la8); err_free_nothing: @@ -644,25 +639,26 @@ static int set_samplerate(struct sr_device_instance *sdi, uint64_t samplerate) return SR_OK; } -static void hw_closedev(int device_index) +static int hw_closedev(int device_index) { struct sr_device_instance *sdi; struct la8 *la8; if (!(sdi = sr_get_device_instance(device_instances, device_index))) { sr_err("la8: %s: sdi was NULL", __func__); - return; + return SR_ERR; /* TODO: SR_ERR_ARG? */ } if (!(la8 = sdi->priv)) { sr_err("la8: %s: sdi->priv was NULL", __func__); - return; + return SR_ERR; /* TODO: SR_ERR_ARG? */ } sr_dbg("la8: closing device"); if (sdi->status == SR_ST_ACTIVE) { sr_dbg("la8: %s: status ACTIVE, closing device", __func__); + /* TODO: Really ignore errors here, or return SR_ERR? */ (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */ } else { sr_dbg("la8: %s: status not ACTIVE, nothing to do", __func__); @@ -671,8 +667,9 @@ static void hw_closedev(int device_index) sdi->status = SR_ST_INACTIVE; sr_dbg("la8: %s: freeing sample buffers", __func__); - free(la8->mangled_buf); - free(la8->final_buf); + g_free(la8->final_buf); + + return SR_OK; } static void hw_cleanup(void) @@ -821,7 +818,7 @@ static int hw_set_configuration(int device_index, int capability, void *value) } /** - * Get a block of 4096 bytes of data from the LA8. + * Get a block of data from the LA8. * * @param la8 The LA8 struct containing private per-device-instance data. * @return SR_OK upon success, or SR_ERR upon errors. @@ -843,20 +840,20 @@ static int la8_read_block(struct la8 *la8) // sr_dbg("la8: %s: reading block %d", __func__, la8->block_counter); - bytes_read = la8_read(la8, la8->mangled_buf, 4096); + bytes_read = la8_read(la8, la8->mangled_buf, BS); /* If first block read got 0 bytes, retry until success or timeout. */ if ((bytes_read == 0) && (la8->block_counter == 0)) { do { // sr_dbg("la8: %s: reading block 0 again", __func__); - bytes_read = la8_read(la8, la8->mangled_buf, 4096); + bytes_read = la8_read(la8, la8->mangled_buf, BS); /* TODO: How to handle read errors here? */ now = time(NULL); } while ((la8->done > now) && (bytes_read == 0)); } /* Check if block read was successful or a timeout occured. */ - if (bytes_read != 4096) { + if (bytes_read != BS) { sr_warn("la8: %s: trigger timed out", __func__); (void) la8_reset(la8); /* Ignore errors. */ return SR_ERR; @@ -864,10 +861,10 @@ static int la8_read_block(struct la8 *la8) /* De-mangle the data. */ // sr_dbg("la8: de-mangling samples of block %d", la8->block_counter); - byte_offset = la8->block_counter * 4096; + byte_offset = la8->block_counter * BS; m = byte_offset / (1024 * 1024); mi = m * (1024 * 1024); - for (i = 0; i < 4096; i++) { + for (i = 0; i < BS; i++) { p = i & (1 << 0); index = m * 2 + (((byte_offset + i) - mi) / 2) * 16; index += (la8->divcount == 0) ? p : (1 - p); @@ -877,11 +874,101 @@ static int la8_read_block(struct la8 *la8) return SR_OK; } +static void send_block_to_session_bus(struct la8 *la8, int block) +{ + int i; + uint8_t sample, expected_sample; + struct sr_datafeed_packet packet; + int trigger_point; /* Relative trigger point (in this block). */ + + /* Note: No sanity checks on la8/block, caller is responsible. */ + + /* Check if we can find the trigger condition in this block. */ + trigger_point = -1; + expected_sample = la8->trigger_pattern & la8->trigger_mask; + for (i = 0; i < BS; i++) { + /* Don't continue if the trigger was found previously. */ + if (la8->trigger_found) + break; + + /* + * Also, don't continue if triggers are "don't care", i.e. if + * no trigger conditions were specified by the user. In that + * case we don't want to send an SR_DF_TRIGGER packet at all. + */ + if (la8->trigger_mask == 0x00) + break; + + sample = *(la8->final_buf + (block * BS) + i); + + if ((sample & la8->trigger_mask) == expected_sample) { + trigger_point = i; + la8->trigger_found = 1; + break; + } + } + + /* If no trigger was found, send one SR_DF_LOGIC packet. */ + if (trigger_point == -1) { + /* Send an SR_DF_LOGIC packet to the session bus. */ + // sr_dbg("la8: sending SR_DF_LOGIC packet (%d bytes) for " + // "block %d", BS, block); + packet.type = SR_DF_LOGIC; + packet.length = BS; + packet.unitsize = 1; + packet.payload = la8->final_buf + (block * BS); + sr_session_bus(la8->session_id, &packet); + return; + } + + /* + * We found the trigger, so some special handling is needed. We have + * to send an SR_DF_LOGIC packet with the samples before the trigger + * (if any), then the SD_DF_TRIGGER packet itself, then another + * SR_DF_LOGIC packet with the samples after the trigger (if any). + */ + + /* TODO: Send SR_DF_TRIGGER packet before or after the actual sample? */ + + /* If at least one sample is located before the trigger... */ + if (trigger_point > 0) { + /* Send pre-trigger SR_DF_LOGIC packet to the session bus. */ + sr_dbg("la8: sending pre-trigger SR_DF_LOGIC packet, " + "start = %d, length = %d", block * BS, trigger_point); + packet.type = SR_DF_LOGIC; + packet.length = trigger_point; + packet.unitsize = 1; + packet.payload = la8->final_buf + (block * BS); + sr_session_bus(la8->session_id, &packet); + } + + /* Send the SR_DF_TRIGGER packet to the session bus. */ + sr_dbg("la8: sending SR_DF_TRIGGER packet, sample = %d", + (block * BS) + trigger_point); + packet.type = SR_DF_TRIGGER; + packet.length = 0; + packet.unitsize = 0; + packet.payload = NULL; + sr_session_bus(la8->session_id, &packet); + + /* If at least one sample is located after the trigger... */ + if (trigger_point < (BS - 1)) { + /* Send post-trigger SR_DF_LOGIC packet to the session bus. */ + sr_dbg("la8: sending post-trigger SR_DF_LOGIC packet, " + "start = %d, length = %d", + (block * BS) + trigger_point, BS - trigger_point); + packet.type = SR_DF_LOGIC; + packet.length = BS - trigger_point; + packet.unitsize = 1; + packet.payload = la8->final_buf + (block * BS) + trigger_point; + sr_session_bus(la8->session_id, &packet); + } +} + static int receive_data(int fd, int revents, void *user_data) { int i, ret; struct sr_device_instance *sdi; - struct sr_datafeed_packet packet; struct la8 *la8; /* Avoid compiler errors. */ @@ -898,15 +985,15 @@ static int receive_data(int fd, int revents, void *user_data) return FALSE; } - /* Get one block of data (4096 bytes). */ + /* Get one block of data. */ if ((ret = la8_read_block(la8)) < 0) { sr_err("la8: %s: la8_read_block error: %d", __func__, ret); hw_stop_acquisition(sdi->index, user_data); return FALSE; } - /* We need to get exactly 2048 blocks (i.e. 8MB) of data. */ - if (la8->block_counter != 2047) { + /* We need to get exactly NUM_BLOCKS blocks (i.e. 8MB) of data. */ + if (la8->block_counter != (NUM_BLOCKS - 1)) { la8->block_counter++; return TRUE; } @@ -914,15 +1001,8 @@ static int receive_data(int fd, int revents, void *user_data) sr_dbg("la8: sampling finished, sending data to session bus now"); /* All data was received and demangled, send it to the session bus. */ - for (i = 0; i < 2048; i++) { - /* Send a 4096 byte SR_DF_LOGIC packet to the session bus. */ - // sr_dbg("la8: %s: sending SR_DF_LOGIC packet", __func__); - packet.type = SR_DF_LOGIC; - packet.length = 4096; - packet.unitsize = 1; - packet.payload = la8->final_buf + (i * 4096); - sr_session_bus(la8->session_id, &packet); - } + for (i = 0; i < NUM_BLOCKS; i++) + send_block_to_session_bus(la8, i); hw_stop_acquisition(sdi->index, user_data); @@ -993,7 +1073,7 @@ static int hw_start_acquisition(int device_index, gpointer session_device_id) gettimeofday(&header.starttime, NULL); header.samplerate = la8->cur_samplerate; header.protocol_id = SR_PROTO_RAW; - header.num_logic_probes = la8->num_probes; + header.num_logic_probes = NUM_PROBES; header.num_analog_probes = 0; sr_session_bus(session_device_id, &packet); @@ -1001,6 +1081,7 @@ static int hw_start_acquisition(int device_index, gpointer session_device_id) la8->done = (la8->divcount + 1) * 0.08388608 + time(NULL) + la8->trigger_timeout; la8->block_counter = 0; + la8->trigger_found = 0; /* Hook up a dummy handler to receive data from the LA8. */ sr_source_add(-1, G_IO_IN, 0, receive_data, sdi); @@ -1041,8 +1122,8 @@ struct sr_device_plugin chronovu_la8_plugin_info = { .api_version = 1, .init = hw_init, .cleanup = hw_cleanup, - .open = hw_opendev, - .close = hw_closedev, + .opendev = hw_opendev, + .closedev = hw_closedev, .get_device_info = hw_get_device_info, .get_status = hw_get_status, .get_capabilities = hw_get_capabilities,