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Merge pull request #2793 from openmv/fix_lepton_sync
common/vospi: Fix synchronization issues.
This commit is contained in:
commit
62a652044f
133
common/vospi.c
133
common/vospi.c
@ -37,36 +37,47 @@
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#include "omv_common.h"
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#include "omv_spi.h"
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#define VOSPI_HEADER_WORDS (2) // 16-bits
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#define VOSPI_PID_SIZE_PIXELS (80) // w, 16-bits per pixel
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#define VOSPI_PIDS_PER_SID (60) // h
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#define VOSPI_SIDS_PER_FRAME (4)
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#define VOSPI_PACKET_SIZE (VOSPI_HEADER_WORDS + VOSPI_PID_SIZE_PIXELS) // 16-bits
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#define VOSPI_SID_SIZE_PIXELS (VOSPI_PIDS_PER_SID * VOSPI_PID_SIZE_PIXELS) // 16-bits
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#define VOSPI_HEADER_WORDS (2) // 16-bits
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#define VOSPI_PID_SIZE_PIXELS (80) // w, 16-bits per pixel
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#define VOSPI_PIDS_PER_SID (60) // h
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#define VOSPI_SIDS_PER_FRAME(vospi) (VOSPI_IS_LEPTON3(vospi) ? 4 : 1)
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#define VOSPI_PACKET_SIZE (VOSPI_HEADER_WORDS + VOSPI_PID_SIZE_PIXELS) // 16-bits
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#define VOSPI_SID_SIZE_PIXELS (VOSPI_PIDS_PER_SID * VOSPI_PID_SIZE_PIXELS) // 16-bits
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#define VOSPI_BUFFER_SIZE (VOSPI_PACKET_SIZE * 2) // 16-bits
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#define VOSPI_CLOCK_SPEED 20000000 // hz
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#define VOSPI_SYNC_MS 200 // ms
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#define VOSPI_BUFFER_SIZE (VOSPI_PACKET_SIZE * 2) // 16-bits
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#define VOSPI_CLOCK_SPEED 20000000 // hz
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#define VOSPI_SYNC_DELAY_MS 250 // ms
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#define VOSPI_SYNC_TIMEOUT_MS 100
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#define VOSPI_DONT_CARE_PACKET (0x0F00)
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#define VOSPI_HEADER_DONT_CARE(x) (((x) & VOSPI_DONT_CARE_PACKET) == VOSPI_DONT_CARE_PACKET)
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#define VOSPI_HEADER_PID(id) ((id) & 0x0FFF)
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#define VOSPI_HEADER_SID(id) (((id) >> 12) & 0x7)
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#define VOSPI_IS_SPECIAL_PACKET(pid) (vospi.lepton_3 && pid == 20)
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// Packet Header Format (32 bits total: ID Field + CRC)
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// ┌───┬───────────┬──────────────────┬───────────────┐
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// │ 0 │ 3-bit SID │ 12-bit PID (0–20)│ 16-bit CRC │
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// └───┴───────────┴──────────────────┴───────────────┘
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// Notes:
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// - Packet numbers restart at 0 on each new segment.
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// - Discard packets with PID 0x0Fxx.
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// - On packet 20, the SID bits encode the segment number (1–4).
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#define VOSPI_HEADER_PID(id) ((id) & 0x0FFFu)
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#define VOSPI_HEADER_SID(id) (((id) >> 12u) & 0x7u)
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#define VOSPI_IS_LEPTON3(vospi) (vospi.n_packets > VOSPI_PIDS_PER_SID)
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#define VOSPI_IS_PID_VALID(vospi, pid) (((pid) & 0x0F00u) != 0x0F00u)
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#define VOSPI_IS_SID_VALID(vospi, pid) (VOSPI_IS_LEPTON3(vospi) && pid == 20)
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typedef enum {
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VOSPI_FLAG_STREAM = (1 << 0),
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VOSPI_FLAG_CAPTURE = (1 << 1),
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VOSPI_FLAG_SYNC_ERROR = (1 << 2),
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} vospi_flags_t;
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typedef struct _vospi_state {
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int pid;
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int sid;
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size_t pid;
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size_t sid;
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framebuffer_t *fb;
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bool lepton_3;
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omv_spi_t spi_bus;
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size_t n_packets;
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uint32_t last_abort_ms;
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size_t last_sync_ms;
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volatile uint32_t flags;
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uint32_t resync_ms;
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} vospi_state_t;
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static vospi_state_t vospi;
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@ -94,22 +105,28 @@ static bool vospi_check_crc(const uint16_t *base) {
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}
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static void vospi_callback(omv_spi_t *spi, void *userdata, void *buf) {
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vbuffer_t *buffer = NULL;
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const uint16_t *base = (uint16_t *) buf;
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if (!(vospi.flags & VOSPI_FLAG_CAPTURE) ||
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!(vospi.flags & VOSPI_FLAG_STREAM)) {
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return;
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}
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const uint16_t *base = (uint16_t *) buf;
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size_t pid = VOSPI_HEADER_PID(base[0]);
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size_t sid = VOSPI_HEADER_SID(base[0]) - 1; // SID is one-based
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int id = base[0];
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// Ignore don't care packets.
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if (VOSPI_HEADER_DONT_CARE(id)) {
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// Discard invalid/don't care packets.
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if (!VOSPI_IS_PID_VALID(vospi, pid)) {
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return;
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}
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int pid = VOSPI_HEADER_PID(id);
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int sid = VOSPI_HEADER_SID(id) - 1;
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// Abort the VoSPI stream if not sync'ing for too long.
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if ((mp_hal_ticks_ms() - vospi.last_sync_ms) >= VOSPI_SYNC_TIMEOUT_MS) {
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vospi.flags |= VOSPI_FLAG_SYNC_ERROR;
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vospi_abort();
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return;
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}
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// Discard packets with a pid != 0 when waiting for the first packet.
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if (vospi.pid == 0 && pid != 0) {
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@ -117,22 +134,22 @@ static void vospi_callback(omv_spi_t *spi, void *userdata, void *buf) {
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}
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// Discard segments with a sid != 0 when waiting for the first segment.
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if (VOSPI_IS_SPECIAL_PACKET(pid) && vospi.sid == 0 && sid != 0) {
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if (vospi.sid == 0 && sid != 0 && VOSPI_IS_SID_VALID(vospi, pid)) {
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vospi.pid = 0;
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return;
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}
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// Are we in sync with the flir lepton?
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if (pid != vospi.pid ||
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!vospi_check_crc(base) ||
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(VOSPI_IS_SPECIAL_PACKET(pid) && sid != vospi.sid)) {
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// Check if packet is in sync with the expected VoSPI stream
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if (pid != vospi.pid || !vospi_check_crc(base) ||
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(VOSPI_IS_SID_VALID(vospi, pid) && sid != vospi.sid)) {
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vospi_abort();
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return;
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}
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vbuffer_t *buffer = framebuffer_acquire(vospi.fb, FB_FLAG_FREE | FB_FLAG_PEEK);
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// Update sync timestamp.
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vospi.last_sync_ms = mp_hal_ticks_ms();
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if (!buffer) {
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if (!(buffer = framebuffer_acquire(vospi.fb, FB_FLAG_FREE | FB_FLAG_PEEK))) {
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vospi.flags &= ~VOSPI_FLAG_CAPTURE;
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return;
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}
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@ -144,26 +161,17 @@ static void vospi_callback(omv_spi_t *spi, void *userdata, void *buf) {
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if (++vospi.pid == VOSPI_PIDS_PER_SID) {
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vospi.pid = 0;
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// For the FLIR Lepton 3 we have to receive all the pids in all the segments.
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if (vospi.lepton_3) {
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if (++vospi.sid == VOSPI_SIDS_PER_FRAME) {
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vospi.sid = 0;
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framebuffer_release(vospi.fb, FB_FLAG_FREE);
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}
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// For the FLIR Lepton 1/2 we just have to receive all the pids.
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} else {
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// Move the buffer from free queue -> used queue.
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if (++vospi.sid == VOSPI_SIDS_PER_FRAME(vospi)) {
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vospi.sid = 0;
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framebuffer_release(vospi.fb, FB_FLAG_FREE);
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}
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}
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}
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int vospi_init(uint32_t n_packets, framebuffer_t *fb) {
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int vospi_init(size_t n_packets, framebuffer_t *fb) {
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memset(&vospi, 0, sizeof(vospi_state_t));
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vospi.fb = fb;
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vospi.lepton_3 = n_packets > VOSPI_PIDS_PER_SID;
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vospi.n_packets = n_packets;
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omv_spi_config_t spi_config;
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omv_spi_default_config(&spi_config, OMV_CSI_SPI_ID);
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@ -189,29 +197,34 @@ bool vospi_active(void) {
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int vospi_abort(void) {
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vospi.flags = 0;
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int ret = omv_spi_transfer_abort(&vospi.spi_bus);
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vospi.pid = 0;
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vospi.sid = 0;
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vospi.resync_ms = mp_hal_ticks_ms();
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return ret;
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omv_spi_deinit(&vospi.spi_bus);
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vospi.last_abort_ms = mp_hal_ticks_ms();
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return 0;
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}
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void vospi_restart(void) {
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omv_spi_transfer_t spi_xfer = {
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.rxbuf = vospi_buf,
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.size = VOSPI_BUFFER_SIZE,
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.flags = OMV_SPI_XFER_DMA,
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.callback = vospi_callback,
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};
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// Update sync timestamp.
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vospi.last_sync_ms = mp_hal_ticks_ms();
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// Resume streaming.
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vospi.flags |= VOSPI_FLAG_CAPTURE;
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vospi.flags &= ~VOSPI_FLAG_SYNC_ERROR;
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if (!(vospi.flags & VOSPI_FLAG_STREAM) &&
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(mp_hal_ticks_ms() - vospi.resync_ms) >= VOSPI_SYNC_MS) {
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omv_spi_transfer_start(&vospi.spi_bus, &spi_xfer);
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vospi.flags |= VOSPI_FLAG_STREAM;
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}
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(mp_hal_ticks_ms() - vospi.last_abort_ms) >= VOSPI_SYNC_DELAY_MS) {
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omv_spi_transfer_t spi_xfer = {
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.rxbuf = vospi_buf,
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.size = VOSPI_BUFFER_SIZE,
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.flags = OMV_SPI_XFER_DMA,
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.callback = vospi_callback,
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};
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vospi_init(vospi.n_packets, vospi.fb);
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// Restart VoSPI transfer.
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vospi.flags |= VOSPI_FLAG_STREAM;
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vospi.last_sync_ms = mp_hal_ticks_ms();
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omv_spi_transfer_start(&vospi.spi_bus, &spi_xfer);
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}
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}
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#endif
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@ -26,8 +26,8 @@
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#ifndef __VOSPI_H__
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#define __VOSPI_H__
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#include "framebuffer.h"
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int vospi_init(uint32_t n_packets, framebuffer_t *fb);
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int vospi_deinit();
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int vospi_init(size_t n_packets, framebuffer_t *fb);
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int vospi_deinit(void);
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int vospi_abort(void);
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bool vospi_active(void);
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void vospi_restart(void);
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