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lpc111x-isp/lpc111x.c: straighten *dialog*() API; radically simplify tracing

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This commit is contained in:
Werner Almesberger 2012-12-29 20:54:24 -03:00
parent 90d39d3fdd
commit eda1135cb0
1 changed files with 65 additions and 82 deletions
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147
lpc111x-isp/lpc111x.c
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@ -31,14 +31,10 @@
#define HOST_RX TGT_TX #define HOST_RX TGT_TX
#define HOST_TX TGT_RX #define HOST_TX TGT_RX
#define MAX_BUF 10000
#define AUTOBAUD_TRIES 10 #define AUTOBAUD_TRIES 10
#define SYNC "Synchronized" #define SYNC "Synchronized"
#define TRACE_ECHO (verbose > 3)
#define TRACE_PROGRESS (verbose > 2)
#define TRACE_RETRY (verbose > 1)
#define TRACE_FATAL (verbose > 0)
static int verbose = 0; static int verbose = 0;
static int quiet = 0; static int quiet = 0;
@ -56,14 +52,13 @@ static void trace(const char *label, const uint8_t *s, int len)
if (*s >= ' ' && *s <= '~') if (*s >= ' ' && *s <= '~')
printf("%c", *s); printf("%c", *s);
else if (*s == 10) else if (*s == 10)
printf(s+1 == end ? "\n" : "\\n"); printf("\\n");
else if (*s == 13) else if (*s == 13)
; printf("\\r");
else else
printf("\\%02o", *s); printf("\\%02o", *s);
} }
if (len && end[-1] != '\n') printf("\n");
printf("...\n");
} }
@ -82,102 +77,109 @@ static void trace_in(const void *s, int len)
/* ----- Dialog functions -------------------------------------------------- */ /* ----- Dialog functions -------------------------------------------------- */
static int dialog_fixed(void *buf, int buf_len, int idle, const char *msg) static const char *dialog_fixed(int idle, const char *msg)
{ {
static char *res = NULL;
int msg_len = strlen(msg); int msg_len = strlen(msg);
char *tx_buf = alloca(msg_len+3); char *tx_buf = alloca(msg_len+3);
uint8_t *rx_buf = alloca(msg_len+2+buf_len); char *rx_buf = alloca(MAX_BUF);
char *s, *t;
int got; int got;
memcpy(tx_buf, msg, msg_len); memcpy(tx_buf, msg, msg_len);
memcpy(tx_buf+msg_len, "\r\n", 2); memcpy(tx_buf+msg_len, "\r\n", 2);
if (TRACE_PROGRESS) if (verbose)
trace_out(tx_buf, msg_len+2); trace_out(tx_buf, msg_len+2);
got = swuart_trx(tx_buf, msg_len+2, rx_buf, msg_len+2+buf_len, got = swuart_trx(tx_buf, msg_len+2, rx_buf, MAX_BUF, idle, idle);
idle, idle); if (verbose)
trace_in(rx_buf, got);
if (got < msg_len+2) { if (got < msg_len+2) {
if (TRACE_FATAL)
trace_in(rx_buf, got);
fprintf(stderr, "response too short for echo\n"); fprintf(stderr, "response too short for echo\n");
exit(1); exit(1);
} }
if (memcmp(rx_buf, msg, msg_len) || if (memcmp(rx_buf, msg, msg_len) ||
rx_buf[msg_len] != '\r' || rx_buf[msg_len+1] != '\n') { rx_buf[msg_len] != '\r' || rx_buf[msg_len+1] != '\n') {
if (TRACE_FATAL)
trace_in(rx_buf, got);
fprintf(stderr, "echo mismatch\n"); fprintf(stderr, "echo mismatch\n");
exit(1); exit(1);
} }
if (TRACE_ECHO) if (memchr(rx_buf, 0, got)) {
trace_in(rx_buf, msg_len+2); fprintf(stderr, "NUL in response\n");
exit(1);
}
rx_buf += msg_len+2;
got -= msg_len+2; got -= msg_len+2;
memcpy(buf, rx_buf+msg_len+2, got);
return got; res = realloc(res, got+1);
if (!res) {
perror("realloc");
exit(1);
}
t = res;
for (s = rx_buf; s != rx_buf+got; s++) {
if (*s == '\r') {
if (s+1 != rx_buf+got && s[1] == '\n')
continue;
fprintf(stderr, "\\r without \\n\n");
exit(1);
}
if (*s == '\n' && !s[1])
break;
*t++ = *s;
}
*t = 0;
return res;
} }
static int vdialog(void *buf, int buf_len, int idle, static const char *vdialog(int idle, const char *cmd, va_list ap)
const char *cmd, va_list ap)
{ {
char *msg; char *msg;
vasprintf(&msg, cmd, ap); vasprintf(&msg, cmd, ap);
return dialog_fixed(buf, buf_len, idle, msg); return dialog_fixed(idle, msg);
} }
static int dialog(void *buf, int buf_len, int idle, const char *cmd, ...) static const char *dialog(int idle, const char *cmd, ...)
{ {
va_list ap; va_list ap;
int res; const char *res;
va_start(ap, cmd); va_start(ap, cmd);
res = vdialog(buf, buf_len, idle, cmd, ap); res = vdialog(idle, cmd, ap);
va_end(ap); va_end(ap);
return res; return res;
} }
static unsigned dialog_rc(char *buf, int buf_len, int idle, static const char *dialog_rc(int idle, const char *cmd, ...)
const char *cmd, ...)
{ {
char *rx_buf = alloca(buf_len+4);
va_list ap; va_list ap;
const char *p, *end; const char *res, *p;
int got;
unsigned rc; unsigned rc;
va_start(ap, cmd); va_start(ap, cmd);
got = vdialog(rx_buf, buf_len+4, idle, cmd, ap); res = vdialog(idle, cmd, ap);
va_end(ap); va_end(ap);
p = memchr(rx_buf, '\r', buf_len+4); p = strchr(res, '\n');
if (!p || p-rx_buf == got || p[1] != '\n' || if (!p || sscanf(res, "%u", &rc) != 1) {
sscanf(rx_buf, "%u", &rc) != 1) {
if (!TRACE_PROGRESS)
trace_in(rx_buf, got);
fprintf(stderr, "invalid status\n"); fprintf(stderr, "invalid status\n");
exit(1); exit(1);
} }
/* @@@ check that the tail really fits */ if (rc != 0) {
fprintf(stderr, "rc %d\n", rc);
for (end = rx_buf+got; p != end; p++) { exit(1);
if (*p == '\r')
continue;
if (*p == '\n' && p+1 == end)
break;
*buf++ = *p;
} }
*buf = 0; return p+1;
return rc;
} }
@ -185,6 +187,7 @@ static int autobaud(void)
{ {
uint8_t reply[100]; uint8_t reply[100];
int i, got; int i, got;
const char *res;
for (i = 0; i != AUTOBAUD_TRIES; i++) { for (i = 0; i != AUTOBAUD_TRIES; i++) {
CLR(TGT_nRESET); CLR(TGT_nRESET);
@ -194,25 +197,14 @@ static int autobaud(void)
usleep(5*1000); /* UM 26.3.1 pg 408 says max 3 ms */ usleep(5*1000); /* UM 26.3.1 pg 408 says max 3 ms */
got = swuart_trx("?", 1, reply, sizeof(reply), 1000, 100); got = swuart_trx("?", 1, reply, sizeof(reply), 1000, 100);
if (got != strlen(SYNC)+2 || memcmp(reply, SYNC "\r\n", got))
if (got != strlen(SYNC)+2 || memcmp(reply, SYNC "\r\n", got)) {
if (TRACE_RETRY)
trace_in(reply, got);
continue; continue;
}
if (TRACE_PROGRESS)
trace_in(reply, got);
got = dialog(reply, sizeof(reply), 100, SYNC); res = dialog(100, SYNC);
if (got == 4 && !memcmp(reply, "OK\r\n", 4)) { if (!strcmp(res, "OK"))
if (TRACE_PROGRESS)
trace_in(reply, got);
return 1; return 1;
} }
if (TRACE_RETRY)
trace_in(reply, got);
}
return 0; return 0;
} }
@ -232,16 +224,12 @@ static const struct device {
static void identify(void) static void identify(void)
{ {
char reply[1000]; const char *res;
unsigned rc, id; unsigned id;
rc = dialog_rc(reply, sizeof(reply), 100, "J"); res = dialog_rc(100, "J");
if (rc) { if (sscanf(res, "%u", &id) != 1) {
fprintf(stderr, "J: rc %u\n", rc); fprintf(stderr, "J: cannot parse ID \"%s\"\n", res);
exit(1);
}
if (sscanf(reply, "%u", &id) != 1) {
fprintf(stderr, "J: cannot parse ID \"%s\"\n", reply);
exit(1); exit(1);
} }
@ -270,8 +258,7 @@ static void at_exit(void)
static void start_isp(void) static void start_isp(void)
{ {
uint8_t reply[1000]; const char *res;
int got;
if (ubb_open(0) < 0) { if (ubb_open(0) < 0) {
perror("ubb_open"); perror("ubb_open");
@ -296,15 +283,11 @@ static void start_isp(void)
exit(1); exit(1);
} }
got = dialog(reply, sizeof(reply), 100, "12000"); res = dialog(100, "12000");
if (got != 4 || memcmp(reply, "OK\r\n", 4)) { if (strcmp(res, "OK")) {
if (TRACE_FATAL)
trace_in(reply, got);
fprintf(stderr, "cannot set clock rate\n"); fprintf(stderr, "cannot set clock rate\n");
exit(1); exit(1);
} }
if (TRACE_PROGRESS)
trace_in(reply, got);
} }
@ -316,7 +299,7 @@ static void usage(const char *name)
fprintf(stderr, fprintf(stderr,
"usage: %s [-q] [-v ...]\n\n" "usage: %s [-q] [-v ...]\n\n"
" -q suppress basic progress messages\n" " -q suppress basic progress messages\n"
" -v increase verbosity level (nothing; errors; retry; progress; echo)\n" " -v increase verbosity level\n"
, name); , name);
exit(1); exit(1);
} }