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LC_ALL=C make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -C ../linux/linux-raspberrypi-kernel_1.20180328-1/ -j 4 M=$(pwd) modules

make: Entering directory '/home/user/git/raspberrypi/linux/linux-raspberrypi-kernel_1.20180328-1'
  CC [M]  /home/user/git/raspberrypi/raspicomm-module/module.o
In file included from /home/user/git/raspberrypi/raspicomm-module/module.c:16:0:
/home/user/git/raspberrypi/raspicomm-module/platform.h:1:100: fatal error: mach/platform.h: Datei oder Verzeichnis nicht gefunden (translate: File or Directory not found)
 #include <mach/platform.h> /* included for BCM2709 & BCM2708 definitions, e.g. BCM2708_PERI_BASE */
                                                                                                    ^
compilation terminated.
scripts/Makefile.build:328: die Regel für Ziel „/home/user/git/raspberrypi/raspicomm-module/module.o“ scheiterte  (translate: recipe for target ... failed)
make[1]: *** [/home/user/git/raspberrypi/raspicomm-module/module.o] Fehler 1
Makefile:1519: recipe for target '_module_/home/user/git/raspberrypi/raspicomm-module' failed
make: *** [_module_/home/user/git/raspberrypi/raspicomm-module] Error 2
make: Leaving directory '/home/user/git/raspberrypi/linux/linux-raspberrypi-kernel_1.20180328-1'

Mar 25 16:14:37 hl-mc-4-dev kernel: [25924.781649] ttyAMA0: 1 input overrun(s)
Mar 25 16:14:45 hl-mc-4-dev kernel: [25932.673028] ttyAMA0: 1 input overrun(s)
Mar 25 16:14:45 hl-mc-4-dev trserver: Error decoding tracker ID from tracker: #0150,0,0,0,0#012
Mar 25 16:15:32 hl-mc-4-dev kernel: [25979.919178] ttyAMA0: 1 input overrun(s)
Mar 25 16:15:32 hl-mc-4-dev trserver: Error decoding data from tracker: #015B2,3,0,0,0,0,0,0E3,0,0,0,12,1,84,-9999#012
Mar 25 16:15:35 hl-mc-4-dev kernel: [25982.313622] ttyAMA0: 1 input overrun(s)
Mar 25 16:15:45 hl-mc-4-dev kernel: [25992.947961] ttyAMA0: 1 input overrun(s)
Mar 25 16:15:45 hl-mc-4-dev trserver: Error decoding data from tracker: #015B3,1,1,0,0,02,258,0,1#012
Mar 25 16:15:52 hl-mc-4-dev trserver: Error decoding data from tracker: #015B2,2,0,0,0,0,0,2A2,3,0,0,0,0,0#012
Mar 25 16:15:52 hl-mc-4-dev kernel: [26000.096681] ttyAMA0: 1 input overrun(s)
Mar 25 16:15:57 hl-mc-4-dev kernel: [26004.244391] ttyAMA0: 1 input overrun(s)
Mar 25 16:15:57 hl-mc-4-dev trserver: Error decoding data from tracker: #015B0,2,0,0,0,0,0,0A0,3,0,0,0,0,0#012

make -C /lib/modules/4.1.13-v7+/build M= modules
make[1]: Entering directory '/usr/src/linux-headers-4.1.13-v7+'
  CHK     include/config/kernel.release
  CHK     include/generated/uapi/linux/version.h
  CHK     include/generated/utsrelease.h
make[2]: 'include/generated/mach-types.h' is up to date.
  CHK     include/generated/bounds.h
  CHK     include/generated/asm-offsets.h
  CALL    scripts/checksyscalls.sh
grep: scripts/../arch/x86/syscalls/syscall_32.tbl: No such file or directory
make[2]: *** No rule to make target 'arch/arm/crypto/aes-armv4.o', needed by 'arch/arm/crypto/aes-arm.o'.  Stop.
Makefile:947: recipe for target 'arch/arm/crypto' failed
make[1]: *** [arch/arm/crypto] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-4.1.13-v7+'
Makefile2:6: recipe for target 'all' failed
make: *** [all] Error 2

CURRENT := $(shell uname -r)
KDIR := /lib/modules/$(CURRENT)/build
PWD := $(shell pwd)

obj-m += raspicommrs485.o

raspicommrs485-objs := module.o queue.o

all:
    # $(MAKE) -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
    $(MAKE) -I $(KDIR)/arch/arm/include/asm/ -C $(KDIR) M=$(PWD)

clean:
    make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean

#include <stdio.h> /* included for printf() */
#include <fcntl.h> /* included for O_RDWR, O_NOCTTY and O_NDELAY */
#include <termios.h> /* included for functions and defines used in set_interface_attribs */
#include <string.h> /* included for memset */
#include <unistd.h>
#include <errno.h>


#define READER "/dev/ttyRPC0"
//#define READER "/dev/ttyUSB0"
int comport;
unsigned char mesg1[]= {0x01,0x02,0x03,0x04};

/*
Source:
http://stackoverflow.com/questions/6947413/how-to-open-read-and-write-from-serial-port-in-c
*/
int set_interface_attribs (int fd, int speed, int parity)
{
  struct termios tty;
  memset (&tty, 0, sizeof tty);
  if (tcgetattr (fd, &tty) != 0)
  {
    printf("error using tcgetattr\n");
    return -1;
  }

  cfsetospeed (&tty, speed);
  cfsetispeed (&tty, speed);

  tty.c_cflag = (tty.c_cflag & ~CSIZE) | CS8; // 8-bit chars
  // disable IGNBRK for mismatched speed tests; otherwise receive break
  // as \000 chars
  tty.c_iflag &= ~IGNBRK; // ignore break signal
  tty.c_lflag = 0; // no signaling chars, no echo,
  // no canonical processing
  tty.c_oflag = 0; // no remapping, no delays
  tty.c_cc[VMIN] = 0; // read doesn't block
  tty.c_cc[VTIME] = 5; // 0.5 seconds read timeout

  tty.c_iflag &= ~(IXON | IXOFF | IXANY); // shut off xon/xoff ctrl

  tty.c_cflag |= (CLOCAL | CREAD);// ignore modem controls,
  // enable reading
  tty.c_cflag &= ~(PARENB | PARODD); // shut off parity
  tty.c_cflag |= parity;
  tty.c_cflag &= ~CSTOPB;
  tty.c_cflag &= ~CRTSCTS;

  if (tcsetattr (fd, TCSANOW, &tty) != 0)
  {
    printf("error from tcsetattr\n");
    return -1;
  }
  return 0;
}

int main(int argc, char** argv)
{
  fprintf(stdout,"Test for RasPiComm\n");

  fprintf(stdout,"Open Port %s...\n", READER);
  if ( (comport = open(READER, O_RDWR | O_NOCTTY | O_NDELAY)) < 0 )
  {
    fprintf(stdout,"failed.\n");
    fprintf(stdout,"possible causes:\n");
    fprintf(stdout,"1) the raspicomm device driver is not loaded. type 'lsmod' and verify that you 'raspicommrs485' is loaded.\n");
    fprintf(stdout,"2) the raspicomm device driver is in use. Is another application using the device driver?\n" );
    fprintf(stdout,"3) something went wrong when loading the device driver. type 'dmesg' and check the kernel messages\n");
    return -1;
  }
  printf("successful. fd=%i\n", comport);
  // configure the port
  if (set_interface_attribs(comport, B19200, PARENB) < 0)
  {
    fprintf(stdout,"Error configuring RS485 Port.\n");
    return -2;
  }
    int count=0;
  while(1)
  {
    fprintf(stdout,"Sending String \n");
    int written=write(comport,mesg1,4);
    if(written<4)
    {
            fprintf(stdout,"Write ERROR!");
    }
    if(count%20==0)
    {
        fprintf(stdout,"\nKLICK\n");
        count=0;
        }
        count++;

    usleep(10000);
  }
  //Never reached
  close(comport);
}