diff options
Diffstat (limited to 'host/usb.c')
| -rw-r--r-- | host/usb.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/host/usb.c b/host/usb.c new file mode 100644 index 0000000..6ed0d1e --- /dev/null +++ b/host/usb.c @@ -0,0 +1,156 @@ + +#include <stdio.h> +#include <stdint.h> +#include <stdlib.h> +#include <string.h> +#include <math.h> +#include <libusb-1.0/libusb.h> + +#include "color.h" +#include "usb.h" + +int matelight_usb_init(){ + int rc = 0; + rc = libusb_init(NULL); + if(rc){ + fprintf(stderr, "LIBML: Cannot initialize libusb\n"); + return 1; + } + return 0; +} + +void matelight_usb_destroy(){ + libusb_exit(NULL); +} + +static int matelight_cmp_str_desc(libusb_device_handle *dev, uint8_t index, char *value){ + char data[256]; + if(libusb_get_string_descriptor_ascii(dev, index, (unsigned char*)data, sizeof(data)) < 0){ + fprintf(stderr, "LIBML: Cannot read device string descriptor\n"); + return 0; + } + return strcmp(data, value) == 0; +} + +matelight_handle *matelight_open(){ + matelight_handle *out = NULL; + libusb_device** device_list; + struct libusb_device_descriptor desc; + ssize_t res = libusb_get_device_list(NULL, &device_list); + if(res == 0){ + fprintf(stderr, "LIBML: Cannot find any connected matelight\n"); + goto error; + }else if(res < 0){ + fprintf(stderr, "LIBML: Error enumerating connected USB devices\n"); + goto error; + }else{ + out = calloc(res+1, sizeof(matelight_handle)); + if(!out){ + fprintf(stderr, "LIBML: Cannot allocate memory\n"); + goto error; + } + memset(out, 0, (res+1)*sizeof(matelight_handle)); + unsigned int found = 0; + for(ssize_t i=0; i<res; i++){ + libusb_get_device_descriptor(device_list[i], &desc); + if(desc.idVendor == MATELIGHT_VID && desc.idProduct == MATELIGHT_PID){ + libusb_device_handle *handle; + if(libusb_open(device_list[i], &(handle))){ + fprintf(stderr, "LIBML: Cannot open Mate Light USB device\n"); + goto error; + } + out[found].handle = handle; + if(matelight_cmp_str_desc(handle, desc.iManufacturer, "Gold & Apple")) + if(matelight_cmp_str_desc(handle, desc.iProduct, "Mate Light")){ +#define BUF_SIZE 256 + char *serial = malloc(BUF_SIZE); + if(!serial){ + fprintf(stderr, "LIBML: Cannot allocate memory\n"); + goto error; + } + if(libusb_get_string_descriptor_ascii(out[found].handle, desc.iSerialNumber, (unsigned char*)serial, BUF_SIZE) < 0){ + fprintf(stderr, "LIBML: Cannot read device string descriptor\n"); + goto error; + } +#undef BUF_SIZE + out[found].serial = serial; + found++; + } + } + } + out[found].handle = NULL; + out[found].serial = NULL; + } + libusb_free_device_list(device_list, 1); + return out; +error: + if(res>0 && out){ + for(ssize_t i=0; i<res; i++){ + if(out[i].handle) + libusb_close(out[i].handle); + free(out[i].serial); + } + } + free(out); + libusb_free_device_list(device_list, 1); + return 0; +} + +typedef struct{ + uint8_t opcode; + uint8_t x, y; + rgb_t buf[CRATE_WIDTH*CRATE_HEIGHT]; +} crate_frame_t; + +int matelight_send_frame(matelight_handle *ml, void *buf, size_t w, size_t h, float brightness, int alpha){ +// fprintf(stderr, "\nFRAME START\n"); + for(size_t cy=0; cy<h; cy++){ +// fprintf(stderr, "##### NEXT ROW\n"); + for(size_t cx=0; cx<w; cx++){ + crate_frame_t frame; + frame.opcode = 0; + frame.x = cx; + frame.y = cy; +// fprintf(stderr, "CRATE %d %d\n", cx, cy); + for(size_t x=0; x<CRATE_WIDTH; x++){ + for(size_t y=0; y<CRATE_HEIGHT; y++){ + size_t dpos = y*CRATE_WIDTH + x; + size_t spos = w*CRATE_WIDTH*(cy*CRATE_HEIGHT+y) + cx*CRATE_WIDTH+x; + color_t *src = (((color_t*)buf)+spos); + rgb_t *dst = frame.buf+dpos; + /* Gamma correction */ +#define GAMMA_APPLY(c) ((uint8_t)roundf(powf((c/255.0F), GAMMA) * brightness * 255)) + dst->r = GAMMA_APPLY(src->r); + dst->g = GAMMA_APPLY(src->g); + dst->b = GAMMA_APPLY(src->b); +// fprintf(stderr, "%c", ((dst->r > 1) ? '#' : '.')); +#undef GAMMA_APPLY + } +// fprintf(stderr, "\n"); + } + int transferred = 0; + int rc = libusb_bulk_transfer(ml->handle, MATELIGHT_FRAMEDATA_ENDPOINT, (unsigned char*)&frame, sizeof(frame), &transferred, MATELIGHT_TIMEOUT); + if(rc){ + fprintf(stderr, "LIBML: Cannot write frame data\n"); + return 1; + } + if(transferred != sizeof(frame)){ + fprintf(stderr, "LIBML: Could not transfer all frame data. Only transferred %d out of %d bytes.\n", transferred, sizeof(frame)); + return 1; + } + } + } + uint8_t payload = 0x01; + int transferred = 0; + int rc = libusb_bulk_transfer(ml->handle, MATELIGHT_FRAMEDATA_ENDPOINT, &payload, sizeof(uint8_t), &transferred, MATELIGHT_TIMEOUT); + if(rc){ + fprintf(stderr, "LIBML: Cannot write frame data\n"); + return 1; + } + if(transferred != sizeof(uint8_t)){ + fprintf(stderr, "LIBML: Could not transfer all frame data. Only transferred %d out of %d bytes.\n", transferred, sizeof(uint8_t)); + return 1; + } + return 0; +} + |