-/* am7xxx - communication with AM7xxx based USB Pico Projectors and DPFs
- *
- * Copyright (C) 2011 Antonio Ospite <ospite@studenti.unina.it>
- *
- * 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
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <stdio.h>
-#include <endian.h>
-#include <errno.h>
-
-#include "am7xxx.h"
-
-#define AM7XXX_VENDOR_ID 0x1de1
-#define AM7XXX_PRODUCT_ID 0xc101
-
-#if 1
-static uint8_t reference_image_header[] = {
- 0x02, 0x00, 0x00, 0x00,
- 0x00,
- 0x10,
- 0x3e,
- 0x10,
- 0x01, 0x00, 0x00, 0x00,
- 0x20, 0x03, 0x00, 0x00,
- 0xe0, 0x01, 0x00, 0x00,
- 0x53, 0xE8, 0x00, 0x00
-};
-#endif
-
-static void dump_image_header(struct am7xxx_image_header *i)
-{
- if (i == NULL)
- return;
-
- printf("Image header:\n");
- printf("format: 0x%08x (%u)\n", i->format, i->format);
- printf("width: 0x%08x (%u)\n", i->width, i->width);
- printf("height: 0x%08x (%u)\n", i->height, i->height);
- printf("image size: 0x%08x (%u)\n", i->image_size, i->image_size);
-}
-
-static void dump_header(struct am7xxx_header *h)
-{
- if (h == NULL)
- return;
-
- printf("packet_type: 0x%08x (%u)\n", h->packet_type, h->packet_type);
- printf("unknown0: 0x%02hhx (%hhu)\n", h->unknown0, h->unknown0);
- printf("header_len: 0x%02hhx (%hhu)\n", h->header_len, h->header_len);
- printf("unknown2: 0x%02hhx (%hhu)\n", h->unknown2, h->unknown2);
- printf("unknown3: 0x%02hhx (%hhu)\n", h->unknown3, h->unknown3);
-
- switch(h->packet_type) {
- case AM7XXX_PACKET_TYPE_IMAGE:
- dump_image_header(&(h->header_data.image));
- break;
-
- default:
- printf("Packet type not supported!\n");
- break;
- }
-
- fflush(stdout);
-}
-
-static inline unsigned int in_80chars(unsigned int i)
-{
- return ((i+1) % (80/3));
-}
-
-static void dump_buffer(uint8_t *buffer, unsigned int len)
-{
- unsigned int i;
-
- if (buffer == NULL || len == 0)
- return;
-
- for (i = 0; i < len; i++) {
- printf("%02hhX%c", buffer[i], (in_80chars(i) && (i < len - 1)) ? ' ' : '\n');
- }
- fflush(stdout);
-}
-
-static int send_data(am7xxx_device dev, uint8_t *buffer, unsigned int len)
-{
- int ret;
- int transferred;
-
- dump_buffer(buffer, len);
-
- ret = libusb_bulk_transfer(dev, 1, buffer, len, &transferred, 0);
- if (ret != 0 || (unsigned int)transferred != len) {
- fprintf(stderr, "Error: ret: %d\ttransferred: %d (expected %u)\n",
- ret, transferred, len);
- return ret;
- }
-
- return 0;
-}
-
-static int send_header(am7xxx_device dev, struct am7xxx_header *h)
-{
- union {
- struct am7xxx_header header;
- uint8_t buffer[sizeof (struct am7xxx_header)];
- } data;
-
- data.header = *h;
-
- return send_data(dev, data.buffer, sizeof (struct am7xxx_header));
-}
-
-am7xxx_device am7xxx_init(void)
-{
- am7xxx_device dev;
-
- libusb_init(NULL);
- libusb_set_debug(NULL, 3);
-
- dev = libusb_open_device_with_vid_pid(NULL,
- AM7XXX_VENDOR_ID,
- AM7XXX_PRODUCT_ID);
- if (dev == NULL) {
- errno = ENODEV;
- perror("libusb_open_device_with_vid_pid");
- goto out_libusb_exit;
- }
-
- libusb_set_configuration(dev, 1);
- libusb_claim_interface(dev, 0);
-
- return dev;
-
-out_libusb_exit:
- libusb_exit(NULL);
- return NULL;
-}
-
-void am7xxx_shutdown(am7xxx_device dev)
-{
- if (dev) {
- libusb_close(dev);
- libusb_exit(NULL);
- }
-}
-
-int am7xxx_send_image(am7xxx_device dev,
- am7xxx_image_format format,
- unsigned int width,
- unsigned int height,
- uint8_t *image,
- unsigned int size)
-{
- int ret;
- struct am7xxx_header h = {
- .packet_type = htole32(AM7XXX_PACKET_TYPE_IMAGE),
- .unknown0 = 0x00,
- .header_len = sizeof(struct am7xxx_image_header),
- .unknown2 = 0x3e,
- .unknown3 = 0x10,
- .header_data = {
- .image = {
- .format = htole32(format),
- .width = htole32(width),
- .height = htole32(height),
- .image_size = htole32(size),
- },
- },
- };
-
- dump_header(&h);
- printf("\n");
-
- printf("Dump Buffers\n");
- dump_buffer(reference_image_header, sizeof(struct am7xxx_header));
-
- ret = send_header(dev, &h);
- if (ret < 0)
- return ret;
-
- if (image == NULL || size == 0)
- return 0;
-
- return send_data(dev, image, size);
-}
projects / libam7xxx.git / commitdiff