mirror of
https://github.com/davidgiven/fluxengine.git
synced 2025-10-24 11:11:02 -07:00
307 lines
9.2 KiB
C++
307 lines
9.2 KiB
C++
#include "globals.h"
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#include "usb.h"
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#include "protocol.h"
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#include "fluxmap.h"
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#include "bytes.h"
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#include "common/crunch.h"
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#include <libusb.h>
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#include "fmt/format.h"
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#define TIMEOUT 5000
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static libusb_device_handle* device;
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static uint8_t buffer[FRAME_SIZE];
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static std::string usberror(int i)
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{
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return libusb_strerror((libusb_error) i);
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}
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static void usb_init()
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{
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if (device)
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return;
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int i = libusb_init(NULL);
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if (i < 0)
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Error() << "could not start libusb: " << usberror(i);
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device = libusb_open_device_with_vid_pid(NULL, FLUXENGINE_VID, FLUXENGINE_PID);
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if (!device)
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Error() << "cannot find the FluxEngine (is it plugged in?)";
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int cfg = -1;
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libusb_get_configuration(device, &cfg);
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if (cfg != 1)
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{
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i = libusb_set_configuration(device, 1);
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if (i < 0)
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Error() << "the FluxEngine would not accept configuration: " << usberror(i);
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}
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i = libusb_claim_interface(device, 0);
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if (i < 0)
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Error() << "could not claim interface: " << usberror(i);
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int version = usbGetVersion();
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if (version != FLUXENGINE_VERSION)
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Error() << "your FluxEngine firmware is at version " << version
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<< " but the client is for version " << FLUXENGINE_VERSION
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<< "; please upgrade";
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}
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static int usb_cmd_send(void* ptr, int len)
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{
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//std::cerr << "send:\n";
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//hexdump(std::cerr, Bytes((const uint8_t*)ptr, len));
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int i = libusb_interrupt_transfer(device, FLUXENGINE_CMD_OUT_EP,
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(uint8_t*) ptr, len, &len, TIMEOUT);
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if (i < 0)
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Error() << "failed to send command: " << usberror(i);
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return len;
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}
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void usb_cmd_recv(void* ptr, int len)
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{
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int i = libusb_interrupt_transfer(device, FLUXENGINE_CMD_IN_EP,
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(uint8_t*) ptr, len, &len, TIMEOUT);
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if (i < 0)
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Error() << "failed to receive command reply: " << usberror(i);
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//std::cerr << "recv:\n";
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//hexdump(std::cerr, Bytes((const uint8_t*)ptr, len));
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}
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static void bad_reply(void)
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{
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struct error_frame* f = (struct error_frame*) buffer;
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if (f->f.type != F_FRAME_ERROR)
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Error() << fmt::format("bad USB reply 0x{:2x}", f->f.type);
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switch (f->error)
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{
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case F_ERROR_BAD_COMMAND:
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Error() << "device did not understand command";
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case F_ERROR_UNDERRUN:
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Error() << "USB underrun (not enough bandwidth)";
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default:
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Error() << fmt::format("unknown device error {}", f->error);
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}
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}
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template <typename T>
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static T* await_reply(int desired)
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{
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for (;;)
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{
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usb_cmd_recv(buffer, sizeof(buffer));
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struct any_frame* r = (struct any_frame*) buffer;
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if (r->f.type == F_FRAME_DEBUG)
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{
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std::cout << "dev: " << ((struct debug_frame*)r)->payload << std::endl;
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continue;
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}
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if (r->f.type != desired)
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bad_reply();
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return (T*) r;
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}
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}
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int usbGetVersion(void)
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{
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usb_init();
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struct any_frame f = { .f = {.type = F_FRAME_GET_VERSION_CMD, .size = sizeof(f)} };
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usb_cmd_send(&f, f.f.size);
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auto r = await_reply<struct version_frame>(F_FRAME_GET_VERSION_REPLY);
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return r->version;
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}
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void usbSeek(int track)
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{
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usb_init();
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struct seek_frame f = {
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{ .type = F_FRAME_SEEK_CMD, .size = sizeof(f) },
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.track = (uint8_t) track
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};
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usb_cmd_send(&f, f.f.size);
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await_reply<struct any_frame>(F_FRAME_SEEK_REPLY);
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}
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void usbRecalibrate()
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{
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usb_init();
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struct any_frame f = {
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{ .type = F_FRAME_RECALIBRATE_CMD, .size = sizeof(f) },
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};
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usb_cmd_send(&f, f.f.size);
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await_reply<struct any_frame>(F_FRAME_RECALIBRATE_REPLY);
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}
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nanoseconds_t usbGetRotationalPeriod(void)
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{
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usb_init();
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struct any_frame f = { .f = {.type = F_FRAME_MEASURE_SPEED_CMD, .size = sizeof(f)} };
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usb_cmd_send(&f, f.f.size);
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auto r = await_reply<struct speed_frame>(F_FRAME_MEASURE_SPEED_REPLY);
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return r->period_ms * 1000000;
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}
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static int large_bulk_transfer(int ep, Bytes& bytes)
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{
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int len;
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int i = libusb_bulk_transfer(device, ep, bytes.begin(), bytes.size(), &len, TIMEOUT);
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if (i < 0)
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Error() << "data transfer failed: " << usberror(i);
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return len;
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}
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void usbTestBulkTransport()
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{
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usb_init();
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struct any_frame f = { .f = {.type = F_FRAME_BULK_TEST_CMD, .size = sizeof(f)} };
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usb_cmd_send(&f, f.f.size);
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/* These must match the device. */
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const int XSIZE = 64;
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const int YSIZE = 256;
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const int ZSIZE = 64;
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Bytes bulk_buffer(XSIZE*YSIZE*ZSIZE);
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double start_time = getCurrentTime();
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large_bulk_transfer(FLUXENGINE_DATA_IN_EP, bulk_buffer);
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double elapsed_time = getCurrentTime() - start_time;
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std::cout << "Transferred "
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<< bulk_buffer.size()
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<< " bytes in "
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<< int(elapsed_time * 1000.0)
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<< " ("
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<< int((bulk_buffer.size() / 1024.0) / elapsed_time)
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<< " kB/s)"
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<< std::endl;
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for (int x=0; x<XSIZE; x++)
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for (int y=0; y<YSIZE; y++)
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for (int z=0; z<ZSIZE; z++)
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{
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int offset = x*XSIZE*YSIZE + y*ZSIZE + z;
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if (bulk_buffer[offset] != uint8_t(x+y+z))
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Error() << "data transfer corrupted at 0x"
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<< std::hex << offset << std::dec
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<< " "
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<< x << '.' << y << '.' << z << '.';
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}
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await_reply<struct any_frame>(F_FRAME_BULK_TEST_REPLY);
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}
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Bytes usbRead(int side, bool synced, nanoseconds_t readTime)
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{
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struct read_frame f = {
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.f = { .type = F_FRAME_READ_CMD, .size = sizeof(f) },
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.side = (uint8_t) side,
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.synced = (uint8_t) synced
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};
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uint16_t milliseconds = readTime / 1e6;
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((uint8_t*)&f.milliseconds)[0] = milliseconds;
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((uint8_t*)&f.milliseconds)[1] = milliseconds >> 8;
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usb_cmd_send(&f, f.f.size);
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auto fluxmap = std::unique_ptr<Fluxmap>(new Fluxmap);
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Bytes buffer(1024*1024);
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int len = large_bulk_transfer(FLUXENGINE_DATA_IN_EP, buffer);
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buffer.resize(len);
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await_reply<struct any_frame>(F_FRAME_READ_REPLY);
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return buffer;
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}
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void usbWrite(int side, const Bytes& bytes)
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{
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unsigned safelen = bytes.size() & ~(FRAME_SIZE-1);
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Bytes safeBytes = bytes.slice(0, safelen);
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struct write_frame f = {
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.f = { .type = F_FRAME_WRITE_CMD, .size = sizeof(f) },
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.side = (uint8_t) side,
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};
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((uint8_t*)&f.bytes_to_write)[0] = safelen;
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((uint8_t*)&f.bytes_to_write)[1] = safelen >> 8;
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((uint8_t*)&f.bytes_to_write)[2] = safelen >> 16;
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((uint8_t*)&f.bytes_to_write)[3] = safelen >> 24;
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usb_cmd_send(&f, f.f.size);
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large_bulk_transfer(FLUXENGINE_DATA_OUT_EP, safeBytes);
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await_reply<struct any_frame>(F_FRAME_WRITE_REPLY);
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}
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void usbErase(int side)
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{
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struct erase_frame f = {
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.f = { .type = F_FRAME_ERASE_CMD, .size = sizeof(f) },
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.side = (uint8_t) side,
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};
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usb_cmd_send(&f, f.f.size);
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await_reply<struct any_frame>(F_FRAME_ERASE_REPLY);
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}
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void usbSetDrive(int drive, bool high_density, int index_mode)
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{
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usb_init();
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struct set_drive_frame f = {
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{ .type = F_FRAME_SET_DRIVE_CMD, .size = sizeof(f) },
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.drive = (uint8_t) drive,
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.high_density = high_density,
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.index_mode = (uint8_t) index_mode
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};
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usb_cmd_send(&f, f.f.size);
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await_reply<struct any_frame>(F_FRAME_SET_DRIVE_REPLY);
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}
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/* Hacky: the board always operates in little-endian mode. */
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static uint16_t read_short_from_usb(uint16_t usb)
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{
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uint8_t* p = (uint8_t*)&usb;
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return p[0] | (p[1] << 8);
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}
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static void convert_voltages_from_usb(const struct voltages& vin, struct voltages& vout)
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{
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vout.logic0_mv = read_short_from_usb(vin.logic0_mv);
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vout.logic1_mv = read_short_from_usb(vin.logic1_mv);
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}
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void usbMeasureVoltages(struct voltages_frame* voltages)
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{
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usb_init();
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struct any_frame f = {
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{ .type = F_FRAME_MEASURE_VOLTAGES_CMD, .size = sizeof(f) },
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};
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usb_cmd_send(&f, f.f.size);
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struct voltages_frame* r = await_reply<struct voltages_frame>(F_FRAME_MEASURE_VOLTAGES_REPLY);
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convert_voltages_from_usb(r->input_both_off, voltages->input_both_off);
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convert_voltages_from_usb(r->input_drive_0_selected, voltages->input_drive_0_selected);
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convert_voltages_from_usb(r->input_drive_1_selected, voltages->input_drive_1_selected);
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convert_voltages_from_usb(r->input_drive_0_running, voltages->input_drive_0_running);
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convert_voltages_from_usb(r->input_drive_1_running, voltages->input_drive_1_running);
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convert_voltages_from_usb(r->output_both_off, voltages->output_both_off);
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convert_voltages_from_usb(r->output_drive_0_selected, voltages->output_drive_0_selected);
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convert_voltages_from_usb(r->output_drive_1_selected, voltages->output_drive_1_selected);
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convert_voltages_from_usb(r->output_drive_0_running, voltages->output_drive_0_running);
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convert_voltages_from_usb(r->output_drive_1_running, voltages->output_drive_1_running);
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}
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