patch #8504 buspirate: Also support "cpufreq" extended parameter in binary mode

* buspirate.c: applied patch + switch off at disable (even when
a reset follows) + some general whitespace/tab cleanup

git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@1339 81a1dc3b-b13d-400b-aceb-764788c761c2

ChangeLog

@@ -1,3 +1,10 @@
+2014-11-13  Rene Liebscher <R.Liebscher@gmx.de>
+
+	patch #8504 buspirate: Also support "cpufreq" extended parameter
+        in binary mode
+	* buspirate.c: applied patch + switch off at disable (even when
+        a reset follows) + some general whitespace/tab cleanup
+
 2014-10-15  Joerg Wunsch <j.gnu@uriah.heep.sax.de>
 
 	bug #37441: lockbits in ATxmega + avrdude = problem

avrdude.1

@@ -1001,9 +1001,7 @@ This sets the AUX pin to output a frequency of
 kHz. Connecting
 the AUX pin to the XTAL1 pin of your MCU, you can provide it a clock, 
 for example when it needs an external clock because of wrong fuses settings.
-This setting is only available in ASCII mode. (The lower limit was chosen so
+Make sure the CPU frequency is at least four times the SPI frequency.  
-the CPU frequency is at least for four times the SPI frequency which is in 
-ASCII mode 30kHz.)  
 .It Ar serial_recv_timeout=<1...>
 This sets the serial receive timeout to the given value. 
 The timeout happens every time avrdude waits for the BusPirate prompt. 

buspirate.c

@@ -227,6 +227,7 @@ static char *buspirate_readline(struct programmer_t *pgm, char *buf, size_t len)
 static int buspirate_send(struct programmer_t *pgm, const char *str)
 {
 	int rc;
+	const char * readline;
 
 	avrdude_message(MSG_DEBUG, "%s: buspirate_send(): %s", progname, str);
 
@@ -238,9 +239,13 @@ static int buspirate_send(struct programmer_t *pgm, const char *str)
 	rc = serial_send(&pgm->fd, (const unsigned char*)str, strlen(str));
 	if (rc)
 		return rc;
-	while (strcmp(buspirate_readline(pgm, NULL, 0), str) != 0)
+	do {
+		readline = buspirate_readline(pgm, NULL, 0);
+		if (readline == NULL)
+			return -1;
 	/* keep reading until we get what we sent there */
-		;
+	} while (strcmp(readline, str) != 0);
+
 	/* by now we should be in sync */
 	return 0;
 }
@@ -263,7 +268,9 @@ static int buspirate_expect(struct programmer_t *pgm, char *send,
 	buspirate_send(pgm, send);
 	while (1) {
 		rcvd = buspirate_readline(pgm, NULL, 0);
-
+		if (rcvd == NULL) {
+			return -1;
+		}
 		if (strncmp(rcvd, expect, expect_len) == 0) {
 			if (! wait_for_prompt) {
 				serial_drain(&pgm->fd, 0);
@@ -280,8 +287,7 @@ static int buspirate_expect(struct programmer_t *pgm, char *send,
 }
 
 /* ====== Do-nothing functions ====== */
-static void buspirate_dummy_6(struct programmer_t *pgm,
+static void buspirate_dummy_6(struct programmer_t *pgm, const char *p)
-				const char *p)
 {
 }
 
@@ -293,8 +299,9 @@ buspirate_parseextparms(struct programmer_t *pgm, LISTID extparms)
 	const char *extended_param;
 	char reset[10];
 	char *preset = reset; /* for strtok() */
-	int spifreq;
+	unsigned int spifreq;
-	int cpufreq;
+	unsigned int rawfreq;
+	unsigned int cpufreq;
 	int serial_recv_timeout;
 
 	for (ln = lfirst(extparms); ln; ln = lnext(ln)) {
@@ -303,32 +310,38 @@ buspirate_parseextparms(struct programmer_t *pgm, LISTID extparms)
 			pgm->flag |= BP_FLAG_XPARM_FORCE_ASCII;
 			continue;
 		}
-		if (sscanf(extended_param, "spifreq=%d", &spifreq) == 1) {
+
+		if (sscanf(extended_param, "spifreq=%u", &spifreq) == 1) {
 			if (spifreq & (~0x07)) {
 				avrdude_message(MSG_INFO, "BusPirate: spifreq must be between 0 and 7.\n");
 				avrdude_message(MSG_INFO, "BusPirate: see BusPirate manual for details.\n");
 				return -1;
 			}
-			pgm->flag = (pgm->flag & ~BP_FLAG_XPARM_RAWFREQ) |
+			if (pgm->flag & BP_FLAG_XPARM_RAWFREQ) {
-				BP_FLAG_XPARM_SPIFREQ;
+				avrdude_message(MSG_INFO, "BusPirate: set either spifreq or rawfreq\n");
+				return -1;
+			}
+			pgm->flag |=  BP_FLAG_XPARM_SPIFREQ;
 			PDATA(pgm)->spifreq = spifreq;
 			continue;
 		}
 
-		unsigned rawfreq;
 		if (sscanf(extended_param, "rawfreq=%u", &rawfreq) == 1) {
 			if (rawfreq >= 4) {
 				avrdude_message(MSG_INFO, "BusPirate: rawfreq must be "
 				                "between 0 and 3.\n");
 				return -1;
 			}
-			pgm->flag = (pgm->flag & ~BP_FLAG_XPARM_SPIFREQ) |
+			if (pgm->flag & BP_FLAG_XPARM_SPIFREQ) {
-				BP_FLAG_XPARM_RAWFREQ;
+				avrdude_message(MSG_INFO, "BusPirate: set either spifreq or rawfreq\n");
+				return -1;
+			}
+			pgm->flag |=  BP_FLAG_XPARM_RAWFREQ;
 			PDATA(pgm)->spifreq = rawfreq;
 			continue;
 		}
 
-		if (sscanf(extended_param, "cpufreq=%d", &cpufreq) == 1) {
+		if (sscanf(extended_param, "cpufreq=%u", &cpufreq) == 1) {
 			/* lower limit comes from 'cpufreq > 4 * spifreq', spifreq in ascii mode is 30kHz. */
 			if (cpufreq < 125 || cpufreq > 4000) {
 				avrdude_message(MSG_INFO, "BusPirate: cpufreq must be between 125 and 4000 kHz.\n");
@@ -368,6 +381,7 @@ buspirate_parseextparms(struct programmer_t *pgm, LISTID extparms)
 			pgm->flag |= BP_FLAG_NOPAGEDREAD;
 			continue;
 		}
+
 		if (sscanf(extended_param, "serial_recv_timeout=%d", &serial_recv_timeout) == 1) {
 			if (serial_recv_timeout < 1) {
 				avrdude_message(MSG_INFO, "BusPirate: serial_recv_timeout must be greater 0.\n");
@@ -376,6 +390,9 @@ buspirate_parseextparms(struct programmer_t *pgm, LISTID extparms)
 			PDATA(pgm)->serial_recv_timeout = serial_recv_timeout;
 			continue;
 		}
+
+		avrdude_message(MSG_INFO, "BusPirate: do not understand extended param '%s'.\n", extended_param);
+		return -1;
 	}
 
 	return 0;
@@ -393,17 +410,12 @@ buspirate_verifyconfig(struct programmer_t *pgm)
 		return -1;
 	}
 
-	if (( (pgm->flag & BP_FLAG_XPARM_SPIFREQ) ||
+	if (  ((pgm->flag & BP_FLAG_XPARM_SPIFREQ) || (pgm->flag & BP_FLAG_XPARM_RAWFREQ))
-	(pgm->flag & BP_FLAG_XPARM_RAWFREQ) ) && buspirate_uses_ascii(pgm)) {
+	   && buspirate_uses_ascii(pgm)) {
 		avrdude_message(MSG_INFO, "BusPirate: SPI speed selection is not supported in ASCII mode\n");
 		return -1;
 	}
 
-	if ((pgm->flag & BP_FLAG_XPARM_CPUFREQ) && !buspirate_uses_ascii(pgm)) {
-		avrdude_message(MSG_INFO, "BusPirate: Setting cpufreq is only supported in ASCII mode\n");
-		return -1;
-	}
-
 	return 0;
 }
 
@@ -437,8 +449,21 @@ static void buspirate_reset_from_binmode(struct programmer_t *pgm)
 {
 	unsigned char buf[10];
 
-	buf[0] = 0x00;	/* BinMode: revert to HiZ */
+	buf[0] = 0x00;	/* BinMode: revert to raw bitbang mode */
 	buspirate_send_bin(pgm, buf, 1);
+	buspirate_recv_bin(pgm, buf, 5);
+
+	if (pgm->flag & BP_FLAG_XPARM_CPUFREQ) {
+		/* disable pwm */
+		if (buspirate_expect_bin_byte(pgm, 0x13, 0x01) != 1) {
+			avrdude_message(MSG_INFO, "%s: warning: did not get a response to stop PWM command.\n", progname);
+		}
+	}
+	/* 0b0100wxyz - Configure peripherals w=power, x=pull-ups, y=AUX, z=CS
+	 * we want everything off -- 0b01000000 = 0x40 */
+	if (buspirate_expect_bin_byte(pgm, 0x40, 0x00) == 1) {
+		avrdude_message(MSG_INFO, "%s: warning: did not get a response to power off command.\n", progname);
+	}
 
 	buf[0] = 0x0F;	/* BinMode: reset */
 	buspirate_send_bin(pgm, buf, 1);
@@ -474,6 +499,7 @@ static int buspirate_start_mode_bin(struct programmer_t *pgm)
 		const char *entered_format;  /* Response, for "scanf" */
 		char config;  /* Command to setup submode parameters */
 	} *submode;
+
 	if (pgm->flag & BP_FLAG_XPARM_RAWFREQ) {
 		submode = &(const struct submode){
 			.name = "Raw-wire",
@@ -516,13 +542,35 @@ static int buspirate_start_mode_bin(struct programmer_t *pgm)
 
 	pgm->flag |= BP_FLAG_IN_BINMODE;
 
+	if (pgm->flag & BP_FLAG_XPARM_CPUFREQ) {
+		unsigned short pwm_duty;
+		unsigned short pwm_period;
+
+		pwm_period = 16000/(PDATA(pgm)->cpufreq) - 1; // oscillator runs at 32MHz, we don't use a prescaler
+		pwm_duty = pwm_period/2; // 50% duty cycle
+
+		avrdude_message(MSG_NOTICE, "Setting up PWM for cpufreq\n");
+		avrdude_message(MSG_DEBUG, "PWM settings: Prescaler=1, Duty Cycle=%hd, Period=%hd\n", pwm_duty, pwm_period);
+
+		buf[0] = 0x12; // pwm setup
+		buf[1] = 0; // prescaler 1
+		buf[2] = (char) ((pwm_duty >> 8) & 0xff); // duty cycle register, high byte
+		buf[3] = (char) pwm_duty & 0xff; // duty cycle register, low byte
+		buf[4] = (char) ((pwm_period >> 8) & 0xff); // period register, high byte
+		buf[5] = (char) pwm_period & 0xff; // period register, low byte
+		buspirate_send_bin(pgm, buf, 6);
+
+		buspirate_recv_bin(pgm, buf, 1);
+		if (buf[0] != 0x01)
+			avrdude_message(MSG_INFO, "cpufreq (PWM) setup failed\n");
+	}
+
 	/* == Set protocol sub-mode of binary mode == */
 	buf[0] = submode->enter;
 	buspirate_send_bin(pgm, buf, 1);
 	memset(buf, 0, sizeof(buf));
 	buspirate_recv_bin(pgm, buf, 4);
-	if (sscanf((const char*)buf, submode->entered_format,
+	if (sscanf((const char*)buf, submode->entered_format, &PDATA(pgm)->submode_version) != 1) {
-	&PDATA(pgm)->submode_version) != 1) {
 		avrdude_message(MSG_INFO, "%s mode not confirmed: '%s'\n",
 		                submode->name, buf);
 		buspirate_reset_from_binmode(pgm);
@@ -609,6 +657,9 @@ static int buspirate_start_spi_mode_ascii(struct programmer_t *pgm)
 	buspirate_send(pgm, "m\n");
 	while(1) {
 		rcvd = buspirate_readline(pgm, NULL, 0);
+		if (rcvd == NULL) {
+			return -1;
+		}
 		if (spi_cmd == -1 && sscanf(rcvd, "%2d. %10s", &cmd, mode)) {
 			if (strcmp(mode, "SPI") == 0)
 				spi_cmd = cmd;
@@ -628,6 +679,9 @@ static int buspirate_start_spi_mode_ascii(struct programmer_t *pgm)
 	buf[0] = '\0';
 	while (1) {
 		rcvd = buspirate_readline(pgm, NULL, 0);
+		if (rcvd == NULL) {
+			return -1;
+		}
 		if (strstr(rcvd, "Normal (H=3.3V, L=GND)")) {
 			/* BP firmware 2.1 defaults to Open-drain output.
 			 * That doesn't work on my board, even with pull-up
@@ -724,8 +778,9 @@ static void buspirate_disable(struct programmer_t *pgm)
 	if (pgm->flag & BP_FLAG_IN_BINMODE) {
 		serial_recv_timeout = 100;
 		buspirate_reset_from_binmode(pgm);
-	} else
+	} else {
 		buspirate_expect(pgm, "#\n", "RESET", 1);
+	}
 }
 
 static int buspirate_initialize(struct programmer_t *pgm, AVRPART * p)
@@ -741,7 +796,7 @@ static void buspirate_powerup(struct programmer_t *pgm)
 		/* Powerup in BinMode is handled in binary mode init */
 		return;
 	} else {
-		if (buspirate_expect(pgm, "W\n", "Power supplies ON", 1)) {
+		if (buspirate_expect(pgm, "W\n", "POWER SUPPLIES ON", 1)) {
 			if (pgm->flag & BP_FLAG_XPARM_CPUFREQ) {
 				char buf[25];
 				int ok = 0;
@@ -768,9 +823,7 @@ static void buspirate_powerup(struct programmer_t *pgm)
 static void buspirate_powerdown(struct programmer_t *pgm)
 {
 	if (pgm->flag & BP_FLAG_IN_BINMODE) {
-		/* 0b0100wxyz - Configure peripherals w=power, x=pull-ups, y=AUX, z=CS
+		/* Powerdown in BinMode is handled in binary mode init */
-		 * we want everything off -- 0b01000000 = 0x40 */
-		if (buspirate_expect_bin_byte(pgm, 0x40, 0x01))
 		return;
 	} else {
 		if (pgm->flag & BP_FLAG_XPARM_CPUFREQ) {
@@ -778,7 +831,7 @@ static void buspirate_powerdown(struct programmer_t *pgm)
 				avrdude_message(MSG_INFO, "%s: warning: did not get a response to stop PWM command.\n", progname);
 			}
 		}
-		if (buspirate_expect(pgm, "w\n", "Power supplies OFF", 1))
+		if (buspirate_expect(pgm, "w\n", "POWER SUPPLIES OFF", 1))
 			return;
 	}
 
@@ -816,6 +869,9 @@ static int buspirate_cmd_ascii(struct programmer_t *pgm,
 	buspirate_send(pgm, buf);
 	while (i < 4) {
 		rcvd = buspirate_readline(pgm, NULL, 0);
+		if (rcvd == NULL) {
+			return -1;
+		}
 		/* WRITE: 0xAC READ: 0x04 */
 		if (sscanf(rcvd, "WRITE: 0x%2x READ: 0x%2x", &spi_write, &spi_read) == 2) {
 			res[i++] = spi_read;

doc/avrdude.texi

@@ -858,9 +858,7 @@ reason, this option disables it.
 This sets the @emph{AUX}  pin to output a frequency of @var{n} kHz. Connecting
 the @emph{AUX} pin to the XTAL1 pin of your MCU, you can provide it a clock, 
 for example when it needs an external clock because of wrong fuses settings.
-This setting is only available in ASCII mode. (The lower limit was chosen so
+Make sure the CPU frequency is at least four times the SPI frequency.  
-the CPU frequency is at least for four times the SPI frequency which is in 
-ASCII mode 30kHz.)  
 
 @item @samp{serial_recv_timeout=@var{1...}}
 This sets the serial receive timeout to the given value.