gbucchino
89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <termios.h>
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#include "common.h"
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int set_serial_device(int fd){
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struct termios serial_cnf;
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if (tcgetattr(fd, &serial_cnf) < 0){
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printf("It's a TTY device\n");
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close(fd);
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return -1;
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}
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cfsetispeed(&serial_cnf, B115200);
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cfsetospeed(&serial_cnf, B115200);
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serial_cnf.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
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serial_cnf.c_iflag &= ~(IXON | IXOFF | IXANY); // Disable software flow control
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serial_cnf.c_iflag &= ~(INLCR | ICRNL | IGNCR);
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serial_cnf.c_cflag &= ~CRTSCTS; // Disable hardware control
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serial_cnf.c_cflag |= CREAD | CLOCAL;
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/* Set 8N1 (8 bits, no parity, 1 stop bit) */
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serial_cnf.c_cflag &= ~PARENB; // No parity
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serial_cnf.c_cflag &= ~CSTOPB; // 1 stop bit
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serial_cnf.c_cflag &= ~CSIZE; // clear data
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serial_cnf.c_cflag |= CS8; // 8 data bits
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serial_cnf.c_oflag &= ~OPOST; // Disable output processing
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serial_cnf.c_cc[VMIN] = 1;
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serial_cnf.c_cc[VTIME] = 0;
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tcflush(fd, TCIFLUSH);
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if (tcsetattr(fd, TCSANOW/*TCSAFLUSH*/, &serial_cnf) < 0) {
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printf("Failed to serial_cnfure the serial port\n");
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close(fd);
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return -1;
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}
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return 0;
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}
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static unsigned short csum(unsigned short *buf, int nwords) {
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unsigned long sum = 0;
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while (nwords > 0) {
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sum += *buf++;
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nwords--;
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}
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sum = (sum >> 16) + (sum & 0xFFFF);
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sum += (sum >> 16);
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return (unsigned short)(~sum);
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}
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int send_uart(struct prng **s_prng){
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int fd;
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if ((fd = open("/dev/ttyACM0", O_RDWR | O_NOCTTY)) < 0){
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printf("Failed to read the device\n");
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exit(-1);
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}
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set_serial_device(fd);
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char buffer[sizeof(struct prng)];
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u_int8_t cmd = 1;
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//printf("Sending command...\n");
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size_t len = write(fd, &cmd, 1);
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//printf("Data sent: %ld\n\n", len);
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// Read data
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//printf("Receiving data...\n");
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int total_len = 0;
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while (total_len < sizeof(struct prng)){
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len = read(fd, buffer + total_len, sizeof(struct prng));
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//printf("Len recv: %ld\n", len);
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total_len += len;
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}
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*s_prng = (struct prng *)buffer;
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close(fd);
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return 0;
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}
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