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changeset 4:81e2f85e02ce

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Implement a command driven 1 wire bus tool.
author darius
date Mon, 12 Jul 2004 15:41:35 +0930
parents ee3c9a16099e
children 4fe81c3b1f4d
files testavr.c
diffstat 1 files changed, 191 insertions(+), 97 deletions(-) [+]
line wrap: on
line diff
--- a/testavr.c	Mon Jul 12 15:39:27 2004 +0930
+++ b/testavr.c	Mon Jul 12 15:41:35 2004 +0930
@@ -30,23 +30,25 @@
 #include <avr/signal.h>
 #include <avr/pgmspace.h>
 #include <string.h>
+#include <ctype.h>
 
 #include "1wire.h"
 
 #define UART_BAUD_SELECT(baudRate,xtalCpu) ((xtalCpu)/((baudRate)*16l)-1)
 #define XTAL_CPU         4000000      /* 4Mhz */
-#define UART_BAUD_RATE      9600      /* 9600 baud */
-
-static uint8_t dir = 0;
-static volatile uint8_t leds = 0;
-static uint8_t ledpos = 0;
+#define UART_BAUD_RATE      19200
 
 void		uart_putsP(const char *addr);
 void		uart_puts(const char *addr);
 int		uart_putc(char c);
-uint8_t		uart_getc(void);
+int		uart_getc(void);
+int		beginswith_P(const char *s1, const char *s2);
     
+#if 0
 uint8_t PROGMEM ledvals[] = {0x01, 0x03, 0x07, 0x0e, 0x1c, 0x38, 0x70, 0xe0, 0xc0, 0x80};
+static uint8_t dir = 0;
+static volatile uint8_t leds = 0;
+static uint8_t ledpos = 0;
 
 INTERRUPT(SIG_OVERFLOW0) {
     if (!leds)
@@ -76,6 +78,7 @@
 
     PORTA = pgm_read_byte(&ledvals[ledpos]);
 }
+#endif
 
 void
 usleep(uint16_t usec) {
@@ -92,12 +95,17 @@
 
 int
 main(void) {
-    uint8_t	ROM[8], count;
-    char	foo[40];
+    uint8_t	ROM[8];
+    char	cmdbuf[40];
     int		i;
     
     cli();
+#if 0
     outp(0xff, DDRA);
+
+    /* Timer Clock divisor - CK/1024 */
+    outp(BV(CS00) | BV(CS02), TCCR0);
+#endif
     outp(0xfe, DDRC);
     outp(0x00, PORTC);
     
@@ -107,47 +115,178 @@
     /* Enable receiver and transmitter. Turn on transmit interrupts */
     outp(BV(RXEN) | BV(TXEN), UCR);
 
-    /* Timer Clock divisor - CK/1024 */
-    outp(BV(CS00) | BV(CS02), TCCR0);
+    uart_putsP(PSTR("\n\r\n\r===============\n\r"
+		    "Inited!\n\r\n\r"));
+
+    while (1) {
+	uart_putsP(PSTR("> "));
+	i = 0;
+	while (1) {
+	    cmdbuf[i] = tolower(uart_getc());
+	    if (cmdbuf[i] == '\n' || cmdbuf[i] == '\r')
+		break;
+	    
+	    /* Backspace */
+	    if (cmdbuf[i] == 010) {
+		if (i > 0) {
+		    uart_putsP(PSTR("\010\040\010"));
+		    i--;
+		}
+		continue;
+	    }
 
-    uart_putsP(PSTR("\n\r\n\r===============\n\r"));
-    uart_putsP(PSTR("Inited!\n\r\n\r"));
-    uart_putsP(PSTR("Test message 1\n\r"));
+	    /* Anything unprintable just ignore it */
+	    if (!isprint(cmdbuf[i]))
+		continue;
+	    
+	    uart_putc(cmdbuf[i]);
+	    i++;
+	    if (i == sizeof(cmdbuf)) {
+		uart_putsP(PSTR("\n\rLine too long\n\r"));
+		i = 0;
+		continue;
+	    }
+	}
+	cmdbuf[i + 1] = '\0';
+	uart_putsP(PSTR("\n\r"));
+	if (i == 0)
+	    continue;
 
-    count = 0;
-    while (1) {
-	char cmd;
+	if (cmdbuf[0] == '?') {
+	    uart_putsP(PSTR("rs               Reset and check for presence\n\r"
+			    "re               Read a bit\n\r"
+			    "rb               Read a byte\n\r"
+			    "wr bit           Write a bit\n\r"
+			    "wb byte          Write a byte (hex)\n\r"
+			    "wc cmd [ROMID]   Write command\n\r"
+			    "te ROMID         Read the temperature from a DS1820\n\r"));
+	    continue;
+	}
 	
-	cmd = uart_getc();
-	switch (cmd) {
-	    case 'r':
-		uart_putsP(PSTR("Resetting... "));
-
-		if (OWTouchReset() == 1)
-		    uart_putsP(PSTR("No presense\n\r"));
-		else
-		    uart_putsP(PSTR("Presense\n\r"));
-		break;
-
-	case 'R':
+	if (i < 2)
+	    goto badcmd;
+	
+	if (cmdbuf[0] == 'r' && cmdbuf[1] == 's') {
+	    uart_putsP(PSTR("Resetting... "));
+	    
+	    if (OWTouchReset() == 1)
+		uart_putsP(PSTR("No presense\n\r"));
+	    else
+		uart_putsP(PSTR("Presense\n\r"));
+	} else if (cmdbuf[0] == 'r' && cmdbuf[1] == 'e') {
 	    if (OWReadBit())
 		uart_putsP(PSTR("Read a 1\n\r"));
 	    else
 		uart_putsP(PSTR("Read a 0\n\r"));
-	    break;	    
-
-	case 'w':
-	    OWWriteBit(0);
-	    uart_putsP(PSTR("Wote a 0\n\r"));
-	    break;
+	} else if (cmdbuf[0] == 'r' && cmdbuf[1] == 'b') {
+	    sprintf_P(cmdbuf, PSTR("Read a 0x%02x\n\r"), OWReadByte());
+	    uart_puts(cmdbuf);
+	} else if (cmdbuf[0] == 'w' && cmdbuf[1] == 'r') {
+	    int arg;
+	    
+	    if (sscanf_P(cmdbuf + 3, PSTR("%d"), &arg) != 1) {
+		uart_putsP(PSTR("Unable to parse wr command\n\r"));
+		continue;
+	    }
+	    
+	    OWWriteBit(arg);
+	    sprintf_P(cmdbuf, PSTR("Wrote a %d\n\r"), arg);
+	    uart_puts(cmdbuf);
+	} else if (cmdbuf[0] == 'w' && cmdbuf[1] == 'b') {
+	    int arg;
+	    
+	    if (sscanf_P(cmdbuf + 3, PSTR("%2x"), &arg) != 1) {
+		uart_putsP(PSTR("Unable to parse wb command\n\r"));
+		continue;
+	    }
+	    
+	    OWWriteByte(arg);
+	    sprintf_P(cmdbuf, PSTR("Wrote a 0x%02x\n\r"), arg);
+	    uart_puts(cmdbuf);
+	} else if (cmdbuf[0] == 'w' && cmdbuf[1] == 'c') {
+	    int		arg;
 
-	case 'W':
-	    OWWriteBit(1);
-	    uart_putsP(PSTR("Wote a 1\n\r"));
-	    break;
-
-	case 'd':
-	    bzero(ROM, 8);
+	    switch (sscanf_P(cmdbuf + 3, PSTR("%x %x:%x:%x:%x:%x:%x:%x:%x:%x"), &arg,
+			     &ROM[0], &ROM[1], &ROM[2], &ROM[3], 
+			     &ROM[4], &ROM[5], &ROM[6], &ROM[7])) {
+		break;
+		
+	    case 1:
+		OWSendCmd(NULL, arg);
+		sprintf_P(cmdbuf, PSTR("Sent 0x%02x to all ROMS\n\r"), arg);
+		uart_puts(cmdbuf);
+		break;
+		
+	    case 9:
+		OWSendCmd(ROM, arg);
+		sprintf_P(cmdbuf, PSTR("Sent 0x%02x to ROM %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n\r"),
+			  arg, ROM[0], ROM[1], ROM[2], ROM[3], 
+			  ROM[4], ROM[5], ROM[6], ROM[7]);
+		uart_puts(cmdbuf);
+		
+		break;
+		
+	    case 0:
+	    default:
+		uart_putsP(PSTR("Unable to parse wc command\n\r"));
+		break;
+	    }
+	    
+	    OWWriteByte(arg);
+	    sprintf_P(cmdbuf, PSTR("Wrote a 0x%02x\n\r"), arg);
+	    uart_puts(cmdbuf);
+	} else if (cmdbuf[0] == 't' && cmdbuf[1] == 'e') {
+	    uint8_t	crc;
+	    uint16_t	temp;
+	    uint8_t	buf[9];
+	    
+	    if (sscanf_P(cmdbuf + 3, PSTR("%x:%x:%x:%x:%x:%x:%x:%x:%x"),
+			 &ROM[0], &ROM[1], &ROM[2], &ROM[3], 
+			 &ROM[4], &ROM[5], &ROM[6], &ROM[7]) != 8) {
+		uart_putsP(PSTR("Unable to parse ROM ID\n\r"));
+		continue;
+	    }
+	    
+	    if (ROM[0] != OW_FAMILY_TEMP) {
+		uart_putsP(PSTR("ROM specified isn't a temperature sensor\n\r"));
+		continue;
+	    }
+	    
+	    OWSendCmd(ROM, OW_CONVERTT_CMD);
+#if OW_DEBUG
+	    uart_putsP(PSTR("Command sent, waiting\n\r"));
+#endif
+	    i = 0;
+	    while (OWReadBit() == 0) {
+		i++;
+	    }
+#if OW_DEBUG
+	    sprintf_P(cmdbuf, PSTR("Temp comversion took %d cycles\n\r"), i);
+	    uart_puts(cmdbuf);
+#endif	
+	    OWSendCmd(ROM, OW_RD_SCR_CMD);
+	    crc = 0;
+	    for (i = 0; i < 9; i++) {
+		buf[i] = OWReadByte();
+		if (i < 8)
+		    OWCRC(buf[i], &crc);
+	    }
+	    
+	    temp = buf[0];
+	    temp |= (uint16_t)buf[1] << 8;
+	    temp <<= 3;
+	    
+	    if (crc != buf[8]) {
+		sprintf_P(cmdbuf, PSTR("CRC mismatch got %d vs calcd %d\n\r"), buf[8], crc);
+		uart_puts(cmdbuf);
+		continue;
+	    }
+	    
+	    sprintf_P(cmdbuf, PSTR("temperature %d.%01d\n\r"),
+		      temp >> 4, (temp << 12) / 6553);
+	    uart_puts(cmdbuf);
+	} else if (cmdbuf[0] == 's' && cmdbuf[1] == 'r') {
+	    memset(ROM, 0, 8);
 	    if (OWTouchReset()) {
 		uart_putsP(PSTR("No devices on bus\n\r"));
 		break;
@@ -157,8 +296,7 @@
 		break;
 	    }
 	    do {
-		uart_putsP(PSTR("Found a module "));
-		sprintf_P(foo, PSTR("%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x"), 
+		sprintf_P(cmdbuf, PSTR("%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n\r"), 
 			  ROM[0],
 			  ROM[1],
 			  ROM[2],
@@ -167,54 +305,11 @@
 			  ROM[5],
 			  ROM[6],
 			  ROM[7]);
-		uart_puts(foo);
-		if (ROM[0] == OW_FAMILY_TEMP) {
-		    uint8_t	tempbuf[9];
-		    uint8_t	crc;
-		    uint16_t	temp;
+		uart_puts(cmdbuf);
+	    } while (OWNext(ROM, 1, 0));
+#if 0
 
-		    uart_putsP(PSTR(" is a temp sensor\n\r"));
-		    OWSendCmd(ROM, OW_CONVERTT_CMD);
-#if OW_DEBUG
-		    uart_putsP(PSTR("Command sent, waiting\n\r"));
-#endif
-		    i = 0;
-		    while (OWReadBit() == 0) {
-			i++;
-		    }
-#if OW_DEBUG
-		    sprintf_P(foo, PSTR("Temp comversion took %d cycles\n\r"), i);
-		    uart_puts(foo);
-#endif
-		    OWSendCmd(ROM, OW_RD_SCR_CMD);
-		    crc = 0;
-		    for (i = 0; i < 9; i++) {
-			tempbuf[i] = OWReadByte();
-			if (i < 8)
-			    OWCRC(tempbuf[i], &crc);
-		    }
-
-		    temp = tempbuf[0];
-		    temp |= (uint16_t)tempbuf[1] << 8;
-		    temp <<= 3;
-		    
-		    if (crc != tempbuf[9]) {
-			sprintf_P(foo, PSTR("CRC mismatch got %d vs calcd %d\n\r"), tempbuf[9], crc);
-			uart_puts(foo);
-		    }
-		    
-		    sprintf_P(foo, PSTR("temperature %d.%01d\n\r"),
-			      temp >> 4, (temp << 12) / 6553);
-		    uart_puts(foo);
-		}
-
-		if (ROM[0] == OW_FAMILY_ROM) {
-		    uart_putsP(PSTR(" is a ROM\n\r"));
-		}
-	    } while (OWNext(ROM, 1, 0));
-	    break;
-
-	case 'l':
+	} else if (cmdbuf[0] == 'l' && cmdbuf[1] == 'e' && cmdbuf[2] == 'd') {
 	    if (leds == 0) {
 		leds = 1;
 		ledpos = 0;
@@ -230,12 +325,10 @@
 		cli();
 		uart_putsP(PSTR("Stopping\n\r"));
 	    }
-	    
-	    break;
-    
-	default:
-	    uart_putsP(PSTR("Unknown command\n\r"));
-	    break;
+#endif	    
+	} else {
+	  badcmd:
+	    uart_putsP(PSTR("Unknown command, ? for a list\n\r"));
 	}
 
     }
@@ -265,10 +358,11 @@
 	uart_putc(*addr++);
 }
 
-uint8_t
+int
 uart_getc(void) {
     while (!(inp(USR) & 0x80))
 	;
     
     return (inp(UDR));
 }
+