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-rw-r--r--include/Makefile9
-rw-r--r--include/debug.h15
-rw-r--r--include/proto.h28
-rw-r--r--include/uart_api.c139
-rw-r--r--[-rwxr-xr-x]include/uart_api.h212
5 files changed, 214 insertions, 189 deletions
diff --git a/include/Makefile b/include/Makefile
new file mode 100644
index 0000000..12f4e25
--- /dev/null
+++ b/include/Makefile
@@ -0,0 +1,9 @@
+CFLAGS += -Wall -DDEBUG_LOG -g
+
+libcomfig.a: uart_api.o
+ $(AR) rcs $@ $^
+ rm *.o
+ mv libcomfig.a ../lib
+
+uart_api.o: uart_api.c
+ $(CC) $(CFLAGS) -c $< -o $@
diff --git a/include/debug.h b/include/debug.h
new file mode 100644
index 0000000..0858176
--- /dev/null
+++ b/include/debug.h
@@ -0,0 +1,15 @@
+/*
+ * File Name: debug.h
+ * Description: if DEBUG_LOG macro defined, expand the DebugLog definition
+ */
+
+#ifndef __DEMO_DEBUG_H__
+#define __DEMO_DEBUG_H__
+
+#ifdef DEBUG_LOG
+#define DebugLog(format, ...) printf(format, ##__VA_ARGS__);
+#else
+#define DebugLog(format, ...)
+#endif
+
+#endif \ No newline at end of file
diff --git a/include/proto.h b/include/proto.h
new file mode 100644
index 0000000..a9307f0
--- /dev/null
+++ b/include/proto.h
@@ -0,0 +1,28 @@
+/*
+ * File Name: proto.h
+ * Description: demo communication protocal
+ */
+
+#ifndef __DEMO_PROTOCOL__
+#define __DEMO_PROTOCOL__
+
+/* demo message queue struct */
+typedef struct demo_mq_struct {
+ long mtype;
+ _Bool tswitch;
+} MQ_STRUCT;
+
+/* demo shared memory struct */
+typedef struct zigbee_th_struct {
+ unsigned short tempNow;
+ unsigned short humiNow;
+} SHM_STRUCT;
+
+/* resources child threads need */
+typedef struct thread_resource_struct {
+ int rw_fd;
+ int shm_id;
+ int mq_id;
+} ARG_STRUCT;
+
+#endif
diff --git a/include/uart_api.c b/include/uart_api.c
new file mode 100644
index 0000000..94d8a60
--- /dev/null
+++ b/include/uart_api.c
@@ -0,0 +1,139 @@
+/*
+ * File Name: uart_api.c
+ * Workflow: implementation of the uart apis
+ * Return Value: open_port return file describer as successful,
+ * set_comfig return 0 as successful,
+ * both function would return -1 as erroneaous
+ */
+
+/* Header files */
+#include "uart_api.h"
+
+/*
+ * Function Name: open_port
+ * Workflow: get a file describer that follows the under requests:
+ * 1, it must be a terminal device
+ * 2, it is NONBLOCK mode
+ */
+int open_port(const char *com_port) {
+ int fd;
+ int flags;
+
+ /* open port in read/write mode */
+ fd = open(com_port, O_RDWR, S_IRUSR | S_IWUSR);
+ DebugLog("[DEBUG-INFO %s:%d]:Open from \"%s\" get fd: %d\n", __FUNCTION__,
+ __LINE__, com_port, fd);
+
+ if (fd < 0) {
+ fprintf(stderr, "[%s:%d] open(): %s", __FUNCTION__, __LINE__,
+ strerror(errno));
+ return -1;
+ }
+
+ /* check if fd is associated with a terminal */
+ if (isatty(fd) == 0) {
+ fprintf(stderr, "[%s:%d] isatty(): %s", __FUNCTION__, __LINE__,
+ strerror(errno));
+ close(fd);
+ return -1;
+ }
+
+ /* file describer is set to non-block mode */
+ flags = fcntl(fd, F_GETFL);
+
+ if (flags == -1) {
+ fprintf(stderr, "[%s:%d] fcntl(): %s", __FUNCTION__, __LINE__,
+ strerror(errno));
+ close(fd);
+ return -1;
+ }
+
+ if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1) {
+ fprintf(stderr, "[%s:%d] fcntl(): %s", __FUNCTION__, __LINE__,
+ strerror(errno));
+ close(fd);
+ return -1;
+ }
+
+ return fd;
+}
+
+/*
+ * Function Name: set_comfig
+ * Workflow: use termios to set the port under these requests:
+ * 1, data bit fixed to 8
+ * 2, no parity check
+ * 3, 1 stop bit
+ * 4, no hardware control flow
+ * 5, wait 3 seconds OR read 6 bytes, either reaches read
+ * would return 6, buffer must be clean
+ */
+int set_comfig(int serial_fd, int baud_rate) {
+ struct termios term_new, term_old;
+
+ /* save old config */
+ if (tcgetattr(serial_fd, &term_old) == -1) {
+ fprintf(stderr, "[%s:%d] tcgetattr(): %s", __FUNCTION__, __LINE__,
+ strerror(errno));
+ return -1;
+ }
+
+ /* prepare new config struct to be used */
+ cfmakeraw(&term_new);
+ term_new.c_cflag &= ~CSIZE;
+
+ /* set baud rate */
+ switch (baud_rate) {
+ case 9600:
+ cfsetispeed(&term_new, B9600);
+ cfsetospeed(&term_new, B9600);
+ break;
+ case 115200:
+ cfsetispeed(&term_new, B115200);
+ cfsetospeed(&term_new, B115200);
+ break;
+ default:
+ fprintf(stderr, "[%s:%d] switch(baud_rate): %s", __FUNCTION__, __LINE__,
+ strerror(errno));
+ return -1;
+ }
+
+ /* set data bit to 8 */
+ term_new.c_cflag &= ~CSIZE;
+ term_new.c_cflag |= CS8;
+
+ /* set no parity check */
+ term_new.c_cflag &= ~PARENB;
+ term_new.c_iflag &= ~INPCK;
+
+ /* set stop bit to 1 */
+ term_new.c_cflag &= ~CSTOPB;
+
+ /* disable hardware flow control
+ * term_new.c_cflag &= ~CRTSCTS; */
+
+ /* set to line buffered */
+ term_new.c_lflag |= ICANON;
+
+ /* set EOF and EOF */
+ term_new.c_cc[VEOL] = '\0';
+
+ /* read() function would wait 3 seconds before return */
+ term_new.c_cc[VTIME] = 30;
+
+ /* read() fuction would return if 6 bytes read */
+ term_new.c_cc[VMIN] = 6;
+
+ /* flush IO buffer area */
+ tcflush(serial_fd, TCIFLUSH);
+ tcflush(serial_fd, TCOFLUSH);
+
+ /* enable setting */
+ if (tcsetattr(serial_fd, TCSANOW, &term_new) == -1) {
+ fprintf(stderr, "[%s:%d] tcsetattr: %s", __FUNCTION__, __LINE__,
+ strerror(errno));
+ return -1;
+ }
+
+ return 0;
+}
diff --git a/include/uart_api.h b/include/uart_api.h
index cfa6473..5a25689 100755..100644
--- a/include/uart_api.h
+++ b/include/uart_api.h
@@ -1,189 +1,23 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <termios.h>
-
-int set_com_config(int fd, int baud_rate, int data_bits, char parity, int stop_bits)
-{
- struct termios new_cfg, old_cfg;
- int speed;
-
- /*save old config*/
- if (tcgetattr(fd, &old_cfg) != 0)
- {
- perror("tcgetattr");
- return -1;
- }
-
- new_cfg =old_cfg;
-
- /*enable local connection and read function*/
- new_cfg.c_cflag |= CLOCAL | CREAD;
-
- /*disable bit mask*/
- new_cfg.c_cflag &= ~CSIZE;
-
- /*disable hardware dataflow control*/
- new_cfg.c_cflag &= ~CRTSCTS;
-
- /*ignore parity error*/
- new_cfg.c_iflag |= IGNPAR;
-
- /*do not transform CR to NL, enable output software data flow control*/
- new_cfg.c_iflag &= ~(ICRNL | IXON);
-
- /*set baud rate*/
- switch (baud_rate)
- {
- case 2400:
- {
- speed = B2400;
- break;
- }
- case 4800:
- {
- speed = B4800;
- break;
- }
- case 9600:
- {
- speed = B9600;
- break;
- }
- case 19200:
- {
- speed = B19200;
- break;
- }
- case 38400:
- {
- speed = B38400;
- break;
- }
-
- default:
- case 115200:
- {
- speed = B115200;
- break;
- }
- }
-
- cfsetispeed(&new_cfg, speed);
- cfsetospeed(&new_cfg, speed);
-
- /*set data bits*/
- switch (data_bits)
- {
- case 7:
- {
- new_cfg.c_cflag |= CS7;
- break;
- }
-
- default:
- case 8:
- {
- new_cfg.c_cflag |= CS8;
- break;
- }
- }
-
- /*set parity*/
- switch (parity)
- {
- default:
- case 'n':
- case 'N':
- {
- new_cfg.c_cflag &= ~PARENB;
- new_cfg.c_iflag &= ~INPCK;
- break;
- }
-
- case 'o':
- case 'O':
- {
- new_cfg.c_cflag |= (PARODD |PARENB);
- new_cfg.c_iflag |= INPCK;
- break;
- }
-
- case 'e':
- case 'E':
- {
- new_cfg.c_cflag |= PARENB;
- new_cfg.c_cflag &= ~PARODD;
- new_cfg.c_iflag |= INPCK;
- break;
- }
-
- case 's':
- case 'S':
- {
- new_cfg.c_cflag &= ~PARENB;
- new_cfg.c_cflag &= ~CSTOPB;
- break;
- }
- }
-
- /*set stop bits*/
- switch (stop_bits)
- {
- default:
- case 1:
- {
- new_cfg.c_cflag &= ~CSTOPB;
- break;
- }
-
- case 2:
- {
- new_cfg.c_cflag |= CSTOPB;
- break;
- }
- }
-
- new_cfg.c_oflag = 0;
- new_cfg.c_lflag = 0;
-
- if ((tcsetattr(fd, TCSANOW, &new_cfg)) != 0)
- {
- perror("tcsetattr");
- return -1;
- }
-
- return 0;
-}
-
-int open_port(char *com_port)
-{
- int fd;
-
- /*open port*/
- fd = open(com_port, O_RDWR|O_NOCTTY|O_NDELAY);
- if (fd < 0)
- {
- perror("open serial port");
- return -1;
- }
-
- /*jam port*/
- if (fcntl(fd, F_SETFL, 0) < 0)
- {
- perror("jam port");
- }
-
- /*check if it is a terminal device*/
- if (isatty(fd) == 0)
- {
- perror("check terminal device");
- }
-
- return fd;
-}
+/*
+ * File Name: uart_api.h
+ * Workflow: serial operation function declaration
+ */
+
+/* Header files */
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include "debug.h"
+
+/* open a path, check and return satisfied file describer */
+int open_port(const char *com_port);
+
+/* set serial config using termios struct, in this API only baud rate is set */
+int set_comfig(int serial_fd, int baud_rate);