shark.c

Submitted by Hiroshi Miura on 日曜, 2007-01-14 12:04

これは、radio SHARKというUSB AM/FMラジオ制御用のコード。パブリックドメインソフトウエア。


/* This souce code written my Michael Rolig (email: michael_rolig@alumni.macalester.edu)
* This can be considered to be in the public domain
*/

#define DEBUG false /* Set true for copious debugging output */
#define SHARK_VENDID 0x077d /* Griffin's Vendor ID */
#define SHARK_DEVID 0x627a /* The radioSHARK's Device ID */

#define READ_EP 0x5 /* libhid read command? */
#define WRITE_EP 0x5 /* libhid write command? */
#define SEND_PACKET_LENGTH 6 /* size of an instruction packet */

#include
#include
#include
#include

void usage(int argc, const char** argv) {
printf("%s \n\tchange state of radioSHARK\n\n", argv[0]);
printf("commands:\n"
" -fm : set FM frequency, e.g. '-fm 91.5'\n"
" -am : set AM frequency, e.g. '-am 730'\n"
" -blue : turn on blue LED (0-127) '-blue 127'\n"
" -bblue : turn on blue LED pulsing (0-127) '-bblue 64'\n"
" -red <0/1> : turn on/off red LED '-red 1'\n");
}

int main(int argc, const char** argv) {

/* Declare variables used later */
hid_return ret;
HIDInterface* hid;
HIDInterfaceMatcher matcher = { SHARK_VENDID, SHARK_DEVID, NULL, NULL, 0 };

/* Build the instruction packet to send to the shark */
unsigned char PACKET[SEND_PACKET_LENGTH] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
unsigned short encodedFreq;
float freq;
unsigned int intensity;
if (argc == 3) {
if (strcmp(argv[1], "-fm") == 0) {
/* Tune to an FM frequency */
PACKET[0] = 0xC0;
encodedFreq = 0;
freq = atof(argv[2]);
encodedFreq = ((freq * 1000) + 10700) / 12.5;
encodedFreq += 3;
PACKET[2] = (encodedFreq >> 8) & 0xFF;
PACKET[3] = encodedFreq & 0xFF;
if (DEBUG) {
printf("band = fm\n");
printf("freq = %.1f\n", freq);
printf("encoded freq = 0x%x\n", (unsigned int)encodedFreq);
}
} else if (strcmp(argv[1], "-am") == 0) {
/* Tune to an AM frequency */
PACKET[0] = 0xC0;
encodedFreq = 0;
freq = (float)atoi(argv[2]);
encodedFreq = ((unsigned short)freq) + 450;
PACKET[1] = 0x12;
PACKET[2] = (encodedFreq >> 8) & 0xFF;
PACKET[3] = encodedFreq & 0xFF;
if (DEBUG) {
printf("band = am\n");
printf("freq = %d\n", (unsigned int)freq);
printf("encoded freq = 0x%x\n", (unsigned int)encodedFreq);
}
} else if (strcmp(argv[1], "-blue") == 0) {
/* Adjust the blue LED */
intensity = atoi(argv[2]);
PACKET[0] = 0xA0;
PACKET[1] = (char)intensity;
} else if (strcmp(argv[1], "-bblue") == 0) {
/* Adjust the blue LED's pulsing rate */
intensity = atoi(argv[2]);
PACKET[0] = 0xA1;
PACKET[1] = (char)intensity;
} else if (strcmp(argv[1], "-red") == 0) {
/* Toggle the red LED */
intensity = atoi(argv[2]);
if (intensity) PACKET[0] = 0xA9;
else PACKET[0] = 0xA8;
PACKET[1] = (char)intensity;
} else {
/* Bad command - display the program's usage instructions */
usage(argc, argv);
exit(1);
}
} else {
usage(argc, argv);
exit(1);
}

/* Turn libhid debugging on if requested. See include/debug.h for possible values. */
if (DEBUG) {
hid_set_debug(HID_DEBUG_ALL);
hid_set_debug_stream(stderr);
hid_set_usb_debug(0); /* passed directly to libusb */
}

/* Initialize the hid library */
ret = hid_init();
if (ret != HID_RET_SUCCESS) {
fprintf(stderr, "hid_init failed with return code %d\n", ret);
return 1;
}

/* Initialize the hid object */
hid = hid_new_HIDInterface();
if (hid == 0) {
fprintf(stderr, "hid_new_HIDInterface() failed, out of memory?\n");
return 1;
}

/* Open the shark */
ret = hid_force_open(hid, 2, &matcher, 3);
if (ret != HID_RET_SUCCESS) {
fprintf(stderr, "hid_force_open failed with return code %d\n", ret);
return 1;
}

/* Send the instruction packet constructed above to the Shark */
ret = hid_interrupt_write(hid, WRITE_EP, (char*)PACKET, SEND_PACKET_LENGTH, 10000);
if (ret != HID_RET_SUCCESS) fprintf(stderr, "hid_interrupt_write failed with return code %d\n", ret);

/* Close the shark */
ret = hid_close(hid);
if (ret != HID_RET_SUCCESS) {
fprintf(stderr, "hid_close failed with return code %d\n", ret);
return 1;
}

/* Delete the hid object */
hid_delete_HIDInterface(&hid);

/* Clean up the hid library */
ret = hid_cleanup();
if (ret != HID_RET_SUCCESS) {
fprintf(stderr, "hid_cleanup failed with return code %d\n", ret);
return 1;
}

return 0;
}

Retrieved from "http://wiki.linuxquestions.org/wiki/RadioSHARKSource"

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