45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
/*
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* Example for RetroBSD on Olimex Duinomite board.
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* RGB LED is connected to D1 and D0 pins of Duinomite board.
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* Use ioctl() calls to control LED.
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*/
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#include <stdio.h>
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#include <sys/ioctl.h>
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#include <sys/gpio.h>
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/*
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* Pins D0 and D1 are connected to signals RE0 and RE1 of pic32 chip.
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*/
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#define MASK_D0 (1 << 0) /* signal RE0 */
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#define MASK_D1 (1 << 1) /* signal RE1 */
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int main()
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{
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int fd;
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char *devname = "/dev/porta";
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/* Open GPIO driver. */
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fd = open(devname, 1);
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if (fd < 0) {
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perror(devname);
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return -1;
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}
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/* Configure pins as output. */
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ioctl(fd, GPIO_PORTE | GPIO_CONFOUT, MASK_D0 | MASK_D1);
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ioctl(fd, GPIO_PORTE | GPIO_CLEAR, MASK_D0 | MASK_D1);
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for (;;) {
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/* Clear D0, set D1. */
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ioctl(fd, GPIO_PORTE | GPIO_CLEAR, MASK_D0);
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ioctl(fd, GPIO_PORTE | GPIO_SET, MASK_D1);
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usleep(250000);
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/* Clear D1, set D0. */
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ioctl(fd, GPIO_PORTE | GPIO_CLEAR, MASK_D1);
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ioctl(fd, GPIO_PORTE | GPIO_SET, MASK_D0);
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usleep(250000);
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}
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return 0;
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}
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