jct/ledcontroller-3bit
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K&R style

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This commit is contained in:
Jens True 2019-04-01 10:40:05 +02:00
parent 98a5539dca
commit 4fe12dfc27
1 changed files with 48 additions and 69 deletions
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117
main.c
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@ -51,17 +51,15 @@
static struct libusb_device_handle *devh = NULL; static struct libusb_device_handle *devh = NULL;
int int main(int argc, char **argv)
main (int argc, char **argv)
{ {
int ret; int ret;
unsigned char code = 0; unsigned char code = 0;
if (argc != 2) if (argc != 2) {
{ printf
printf ("Syntax: %s blue | red | green | aqua | purple | yellow | white | off\n",
("Syntax: %s blue | red | green | aqua | purple | yellow | white | off\n", argv[0]);
argv[0]); return -1;
return -1;
} }
@ -84,74 +82,55 @@ main (int argc, char **argv)
1 1 0 yellow 0x6 (more of a mustard - green color) 1 1 0 yellow 0x6 (more of a mustard - green color)
1 1 1 white 0x7 (a very blue-ish white) 1 1 1 white 0x7 (a very blue-ish white)
*/ */
if (strcmp (argv[1], "blue") == 0) if (strcmp(argv[1], "blue") == 0) {
{ code = 1;
code = 1; } else if (strcmp(argv[1], "red") == 0) {
} code = 2;
else if (strcmp (argv[1], "red") == 0) } else if (strcmp(argv[1], "green") == 0) {
{ code = 3;
code = 2; } else if (strcmp(argv[1], "aqua") == 0) {
} code = 4;
else if (strcmp (argv[1], "green") == 0) } else if (strcmp(argv[1], "purple") == 0) {
{ code = 5;
code = 3; } else if (strcmp(argv[1], "yellow") == 0) {
} code = 6;
else if (strcmp (argv[1], "aqua") == 0) } else if (strcmp(argv[1], "white") == 0) {
{ code = 7;
code = 4; } else {
} printf("invalid color\n");
else if (strcmp (argv[1], "purple") == 0) return -1;
{
code = 5;
}
else if (strcmp (argv[1], "yellow") == 0)
{
code = 6;
}
else if (strcmp (argv[1], "white") == 0)
{
code = 7;
}
else
{
printf ("invalid color\n");
return -1;
} }
libusb_init (NULL); libusb_init(NULL);
devh = libusb_open_device_with_vid_pid (NULL, VID, PID); devh = libusb_open_device_with_vid_pid(NULL, VID, PID);
if (devh == NULL) if (devh == NULL) {
{ printf("not found\n");
printf ("not found\n"); return -1;
return -1;
} }
if (libusb_kernel_driver_active (devh, 0)) if (libusb_kernel_driver_active(devh, 0)) {
{ printf("detach from kernel\n");
printf ("detach from kernel\n"); ret = libusb_detach_kernel_driver(devh, 0);
ret = libusb_detach_kernel_driver (devh, 0); if (ret < 0) {
if (ret < 0) printf("can't detach\n");
{ return -1;
printf ("can't detach\n");
return -1;
} }
} }
char data[5]; char data[5];
data[0] = code; data[0] = code;
data[1] = 0x4; data[1] = 0x4;
data[2] = 0x4; data[2] = 0x4;
data[3] = 0x4; data[3] = 0x4;
data[4] = 0x4; data[4] = 0x4;
int dummy; int dummy;
libusb_claim_interface (devh, 0); libusb_claim_interface(devh, 0);
ret = libusb_interrupt_transfer (devh, 0x2, data, 5, &dummy, 0); ret = libusb_interrupt_transfer(devh, 0x2, data, 5, &dummy, 0);
if (ret < 0) if (ret < 0) {
{ perror("error");
perror ("error");
} }
return 0; return 0;
} }