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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49
main.c
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@ -51,13 +51,11 @@
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]);
@ -84,54 +82,36 @@ 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) {
else if (strcmp (argv[1], "red") == 0)
{
code = 2; code = 2;
} } else if (strcmp(argv[1], "green") == 0) {
else if (strcmp (argv[1], "green") == 0)
{
code = 3; code = 3;
} } else if (strcmp(argv[1], "aqua") == 0) {
else if (strcmp (argv[1], "aqua") == 0)
{
code = 4; code = 4;
} } else if (strcmp(argv[1], "purple") == 0) {
else if (strcmp (argv[1], "purple") == 0)
{
code = 5; code = 5;
} } else if (strcmp(argv[1], "yellow") == 0) {
else if (strcmp (argv[1], "yellow") == 0)
{
code = 6; code = 6;
} } else if (strcmp(argv[1], "white") == 0) {
else if (strcmp (argv[1], "white") == 0)
{
code = 7; code = 7;
} } else {
else
{
printf("invalid color\n"); printf("invalid color\n");
return -1; 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"); printf("can't detach\n");
return -1; return -1;
} }
@ -147,8 +127,7 @@ main (int argc, char **argv)
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");
} }