From 4914e5113fbd4d6933e9d92e8ef794712dca170d Mon Sep 17 00:00:00 2001
From: tTh <tth@redlady.dinorama.fr>
Date: Wed, 12 Dec 2018 14:38:32 +0100
Subject: [PATCH] getting serial code from an old project

---
 serial/README.md | 10 ++++-
 serial/serial.c  | 98 ++++++++++++++++++++++++++++++++++++++++++++++++
 serial/serial.h  |  6 +++
 3 files changed, 112 insertions(+), 2 deletions(-)
 create mode 100644 serial/serial.c
 create mode 100644 serial/serial.h

diff --git a/serial/README.md b/serial/README.md
index bdb9934..9b62351 100644
--- a/serial/README.md
+++ b/serial/README.md
@@ -1,8 +1,14 @@
 
-
 # Serial Input
 
 But premier de ce module : recevoir les données fournies par l'automate
-de contrôle du phytotron.
+de contrôle du phytotron. Ayant déja pratiqué ce genre de chose pour un
+déja ancien
+[dfhdfgh](http://art.dinorama.fr/bdf/)
+avec _MadPhoenix_, je me propose de reprendre quelques parties de ce code.
+
+
+
+
 
 
diff --git a/serial/serial.c b/serial/serial.c
new file mode 100644
index 0000000..5162508
--- /dev/null
+++ b/serial/serial.c
@@ -0,0 +1,98 @@
+
+#include <stdio.h>
+#include  <stdlib.h>
+#include <unistd.h>			//Used for UART
+#include <fcntl.h>			//Used for UART
+#include <termios.h>		//Used for UART
+
+#include  "serial.h"
+
+/* -------------------------------------------------------------------- */
+int baudrate2const(int bauds)
+{
+int	br;
+
+switch (bauds)
+	{
+	case 1200:	br = B1200;		break;
+	case 2400:	br = B2400;		break;
+	case 4800:	br = B4800;		break;
+	case 9600:	br = B9600;		break;
+	case 19200:	br = B19200;		break;
+	case 38400:	br = B38400;		break;
+	case 57600:	br = B57600;		break;
+	case 115200:	br = B115200;		break;
+	default:
+		fprintf(stderr, "baudrate %d invalide\n", bauds);
+		exit(1);	
+		break;
+	}
+return br;
+}
+/* -------------------------------------------------------------------- */
+
+int prepare_UART(char *port, int baudrate)
+{
+int		uart0 = -1;
+int		baudbits;
+struct termios	options;
+
+#if DEBUG_LEVEL
+fprintf(stderr, "%s ( %s %d )\n", __func__, port, baudrate);
+#endif
+//OPEN THE UART
+//The flags (defined in fcntl.h):
+//	Access modes (use 1 of these):
+//		O_RDONLY - Open for reading only.
+//		O_RDWR - Open for reading and writing.
+//		O_WRONLY - Open for writing only.
+//
+//	O_NDELAY / O_NONBLOCK (same function) - Enables nonblocking mode.
+// When set read requests on the file can return immediately with a
+// failure status
+// if there is no input immediately available (instead of blocking).
+// Likewise, write requests can also return
+// immediately with a failure status if the output can't be written
+// immediately.
+//
+// O_NOCTTY - When set and path identifies a terminal device, open()
+// shall not cause the terminal device to become the controlling terminal
+// for the process.
+
+uart0 = open(port, O_RDWR | O_NOCTTY);
+if (uart0== -1)
+	{
+	perror("unable to open uart ");
+	return -1;
+	}
+	
+// CONFIGURE THE UART
+// The flags defined in /usr/include/termios.h -
+// see http://pubs.opengroup.org/onlinepubs/007908799/xsh/termios.h.html
+//	Baud rate:- B1200, B2400, B4800, B9600, B19200, B38400, B57600,
+//	B115200, B230400, B460800, B500000, B576000, B921600, B1000000,
+//	B1152000, B1500000, B2000000, B2500000, B3000000, B3500000, B4000000
+//	CSIZE:- CS5, CS6, CS7, CS8
+//	CLOCAL - Ignore modem status lines
+//	CREAD - Enable receiver
+//	IGNPAR = Ignore characters with parity errors
+//	ICRNL - Map CR to NL on input (Use for ASCII comms where you want
+//	to auto correct end of line characters - don't use for bianry comms!)
+//	PARENB - Parity enable
+//	PARODD - Odd parity (else even)
+
+
+baudbits = baudrate2const(baudrate);
+#if DEBUG_LEVEL
+fprintf(stderr, "%d -> %x\n", baudrate, baudbits);
+#endif
+tcgetattr(uart0, &options);
+options.c_cflag = baudbits | CS8 | CLOCAL | CREAD;	//<Set baud rate
+options.c_iflag = IGNPAR;
+options.c_oflag = 0;
+options.c_lflag = 0;
+tcflush(uart0, TCIFLUSH);
+tcsetattr(uart0, TCSANOW, &options);
+
+return uart0;
+}
diff --git a/serial/serial.h b/serial/serial.h
new file mode 100644
index 0000000..bfec248
--- /dev/null
+++ b/serial/serial.h
@@ -0,0 +1,6 @@
+/*
+ *		serial.h
+ */
+
+int prepare_UART(char *port, int bauds);
+