diff options
Diffstat (limited to 'nuttx/examples/usbserial/main.c')
| -rw-r--r-- | nuttx/examples/usbserial/main.c | 148 |
1 files changed, 141 insertions, 7 deletions
diff --git a/nuttx/examples/usbserial/main.c b/nuttx/examples/usbserial/main.c index 9a890a2ad..a29cd5f11 100644 --- a/nuttx/examples/usbserial/main.c +++ b/nuttx/examples/usbserial/main.c @@ -43,6 +43,7 @@ #include <sys/stat.h> #include <stdio.h> #include <unistd.h> +#include <string.h> #include <fcntl.h> #include <errno.h> #include <debug.h> @@ -53,6 +54,19 @@ * Definitions ****************************************************************************/ +#if defined(CONFIG_EXAMPLES_USBSERIAL_INONLY) && defined(CONFIG_EXAMPLES_USBSERIAL_OUTONLY) +# error "Cannot define both CONFIG_EXAMPLES_USBSERIAL_INONLY and _OUTONLY" +#endif +#if defined(CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL) && defined(CONFIG_EXAMPLES_USBSERIAL_ONLYBIG) +# error "Cannot define both CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL and _ONLYBIG" +#endif + +#if !defined(CONFIG_EXAMPLES_USBSERIAL_ONLYBIG) && !defined(CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL) +# ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY +# define COUNTER_NEEDED 1 +# endif +#endif + #ifdef CONFIG_CPP_HAVE_VARARGS # ifdef CONFIG_DEBUG # define message(...) lib_lowprintf(__VA_ARGS__) @@ -73,7 +87,11 @@ * Private Data ****************************************************************************/ +#ifndef CONFIG_EXAMPLES_USBSERIAL_ONLYBIG static const char g_shortmsg[] = "Hello, World!!\n"; +#endif + +#ifndef CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL static const char g_longmsg[] = "The Spanish Armada a Speech by Queen Elizabeth I of England\n" "Addressed to the English army at Tilbury Fort - 1588\n" @@ -100,7 +118,11 @@ static const char g_longmsg[] = "your obedience to my general, by your concord in the camp, and by your " "valour in the field, we shall shortly have a famous victory over the enemies " "of my God, of my kingdom, and of my people.\n"; +#endif + +#ifndef CONFIG_EXAMPLES_USBSERIAL_INONLY static char g_iobuffer[IOBUFFER_SIZE]; +#endif /**************************************************************************** * Public Functions @@ -125,12 +147,20 @@ void user_initialize(void) int user_start(int argc, char *argv[]) { +#ifndef CONFIG_EXAMPLES_USBSERIAL_INONLY int infd; +#endif +#ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY int outfd; - int count; +#endif +#ifdef COUNTER_NEEDED + int count = 0; +#endif ssize_t nbytes; +#ifndef CONFIG_EXAMPLES_USBSERIAL_INONLY + int i, j, k; +#endif int ret; - int i; /* Initialize the USB serial driver */ @@ -145,6 +175,7 @@ int user_start(int argc, char *argv[]) /* Open the USB serial device for writing (blocking) */ +#ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY do { message("user_start: Opening USB serial driver\n"); @@ -171,9 +202,12 @@ int user_start(int argc, char *argv[]) } } while (outfd < 0); +#endif /* Open the USB serial device for reading (non-blocking) */ +#ifndef CONFIG_EXAMPLES_USBSERIAL_INONLY +#ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY infd = open("/dev/ttyUSB0", O_RDONLY|O_NONBLOCK); if (infd < 0) { @@ -181,14 +215,46 @@ int user_start(int argc, char *argv[]) close(outfd); return 3; } +#else + do + { + infd = open("/dev/ttyUSB0", O_RDONLY|O_NONBLOCK); + if (infd < 0) + { + int errcode = errno; + message("user_start: ERROR: Failed to open /dev/ttyUSB0 for reading: %d\n", errno); + + /* ENOTCONN means that the USB device is not yet connected */ + + if (errcode == ENOTCONN) + { + message("user_start: Not connected. Wait and try again.\n"); + sleep(5); + } + else + { + /* Give up on other errors */ + + message("user_start: Aborting\n"); + return 3; + } + } + } + while (infd < 0); +#endif +#endif message("user_start: Successfully opened the serial driver\n"); - /* Then say hello -- forever */ + /* Send messages and get responses -- forever */ - count = 0; for (;;) { + + /* Test IN (device-to-host) messages */ + +#ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY +#if !defined(CONFIG_EXAMPLES_USBSERIAL_ONLYBIG) && !defined(CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL) if (count < 8) { message("user_start: Saying hello\n"); @@ -201,20 +267,37 @@ int user_start(int argc, char *argv[]) nbytes = write(outfd, g_longmsg, sizeof(g_longmsg)); count = 0; } +#elif !defined(CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL) + message("user_start: Reciting QEI's speech of 1588\n"); + nbytes = write(outfd, g_longmsg, sizeof(g_longmsg)); +#else /* !defined(CONFIG_EXAMPLES_USBSERIAL_ONLYBIG) */ + message("user_start: Saying hello\n"); + nbytes = write(outfd, g_shortmsg, sizeof(g_shortmsg)); +#endif + + /* Test if the write was successful */ if (nbytes < 0) { message("user_start: ERROR: write failed: %d\n", errno); +#ifndef CONFIG_EXAMPLES_USBSERIAL_INONLY close(infd); +#endif close(outfd); return 4; } + message("user_start:%d bytes sent\n", nbytes); +#endif /* CONFIG_EXAMPLES_USBSERIAL_OUTONLY */ + /* Test OUT (host-to-device) messages */ + +#ifndef CONFIG_EXAMPLES_USBSERIAL_INONLY /* Poll for incoming messages */ - message("user_start: Waiting\n"); + message("user_start: Polling for OUT messages\n"); for (i = 0; i < 5; i++) { + memset(g_iobuffer, 'X', IOBUFFER_SIZE); nbytes = read(infd, g_iobuffer, IOBUFFER_SIZE); if (nbytes < 0) { @@ -223,7 +306,9 @@ int user_start(int argc, char *argv[]) { message("user_start: ERROR: read failed: %d\n", errno); close(infd); +#ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY close(outfd); +#endif return 6; } } @@ -232,18 +317,67 @@ int user_start(int argc, char *argv[]) message("user_start: Received %d bytes:\n", nbytes); if (nbytes > 0) { - message("user_start: "); - (void)fwrite(g_iobuffer, 1, nbytes, stdout); + for (j = 0; j < nbytes; j += 16) + { + message("user_start: %03x: ", j); + for (k = 0; k < 16; k++) + { + if (k == 8) + { + message(" "); + } + if (j+k < nbytes) + { + message("%02x", g_iobuffer[j+k]); + } + else + { + message(" "); + } + } + message(" "); + for (k = 0; k < 16; k++) + { + if (k == 8) + { + message(" "); + } + if (j+k < nbytes) + { + if (g_iobuffer[j+k] >= 0x20 && g_iobuffer[j+k] < 0x7f) + { + message("%c", g_iobuffer[j+k]); + } + else + { + message("."); + } + } + else + { + message(" "); + } + } + message("\n"); + } } } sleep(1); } +#else /* CONFIG_EXAMPLES_USBSERIAL_INONLY */ + message("user_start: Waiting\n"); + sleep(5); +#endif /* CONFIG_EXAMPLES_USBSERIAL_INONLY */ } /* Won't get here, but if we did this what we would have to do */ +#ifndef CONFIG_EXAMPLES_USBSERIAL_INONLY close(infd); +#endif +#ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY close(outfd); +#endif return 0; } |