Diff: irPronto.cpp

Revision:

0:70c8e56bac45

diff -r 000000000000 -r 70c8e56bac45 irPronto.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/irPronto.cpp	Sat Jan 23 06:16:48 2016 +0000
@@ -0,0 +1,513 @@
+#define TEST 0
+
+#if TEST
+#	define SEND_PRONTO        1
+#	define PRONTO_ONCE        false
+#	define PRONTO_REPEAT      true
+#	define PRONTO_FALLBACK    true
+#	define PRONTO_NOFALLBACK  false
+#endif
+
+#if SEND_PRONTO
+
+//******************************************************************************
+#if TEST
+#	include <stdio.h>
+	void  enableIROut (int freq)  { printf("\nFreq = %d KHz\n", freq); }
+	void  mark        (int t)     { printf("+%d," , t); }
+	void  space       (int t)     { printf("-%d, ", t); }
+#else
+#	include "IRremote.h"
+#endif // TEST
+
+//+=============================================================================
+// Check for a valid hex digit
+//
+bool  ishex (char ch)
+{
+	return ( ((ch >= '0') && (ch <= '9')) ||
+             ((ch >= 'A') && (ch <= 'F')) ||
+             ((ch >= 'a') && (ch <= 'f'))   ) ? true : false ;
+}
+
+//+=============================================================================
+// Check for a valid "blank" ... '\0' is a valid "blank"
+//
+bool  isblank (char ch)
+{
+	return ((ch == ' ') || (ch == '\t') || (ch == '\0')) ? true : false ;
+}
+
+//+=============================================================================
+// Bypass spaces
+//
+bool  byp (char** pcp)
+{
+	while (isblank(**pcp))  (*pcp)++ ;
+}
+
+//+=============================================================================
+// Hex-to-Byte : Decode a hex digit
+// We assume the character has already been validated
+//
+uint8_t  htob (char ch)
+{
+	if ((ch >= '0') && (ch <= '9'))  return ch - '0' ;
+	if ((ch >= 'A') && (ch <= 'F'))  return ch - 'A' + 10 ;
+	if ((ch >= 'a') && (ch <= 'f'))  return ch - 'a' + 10 ;
+}
+
+//+=============================================================================
+// Hex-to-Word : Decode a block of 4 hex digits
+// We assume the string has already been validated
+//   and the pointer being passed points at the start of a block of 4 hex digits
+//
+uint16_t  htow (char* cp)
+{
+	return ( (htob(cp[0]) << 12) | (htob(cp[1]) <<  8) |
+             (htob(cp[2]) <<  4) | (htob(cp[3])      )  ) ;
+}
+
+//+=============================================================================
+//
+bool sendPronto (char* s,  bool repeat,  bool fallback)
+{
+	int       i;
+	int       len;
+	int       skip;
+	char*     cp;
+	uint16_t  freq;  // Frequency in KHz
+	uint8_t   usec;  // pronto uSec/tick
+	uint8_t   once;
+	uint8_t   rpt;
+
+	// Validate the string
+	for (cp = s;  *cp;  cp += 4) {
+		byp(&cp);
+		if ( !ishex(cp[0]) || !ishex(cp[1]) ||
+		     !ishex(cp[2]) || !ishex(cp[3]) || !isblank(cp[4]) )  return false ;
+	}
+
+	// We will use cp to traverse the string
+	cp = s;
+
+	// Check mode = Oscillated/Learned
+	byp(&cp);
+	if (htow(cp) != 0000)  return false;
+	cp += 4;
+
+	// Extract & set frequency
+	byp(&cp);
+	freq = (int)(1000000 / (htow(cp) * 0.241246));  // Rounding errors will occur, tolerance is +/- 10%
+	usec = (int)(((1.0 / freq) * 1000000) + 0.5);  // Another rounding error, thank Cod for analogue electronics
+	freq /= 1000;  // This will introduce a(nother) rounding error which we do not want in the usec calcualtion
+	cp += 4;
+
+	// Get length of "once" code
+	byp(&cp);
+	once = htow(cp);
+	cp += 4;
+
+	// Get length of "repeat" code
+	byp(&cp);
+	rpt = htow(cp);
+	cp += 4;
+
+	// Which code are we sending?
+	if (fallback) { // fallback on the "other" code if "this" code is not present
+		if (!repeat) { // requested 'once'
+			if (once)  len = once * 2,  skip = 0 ;  // if once exists send it
+			else       len = rpt  * 2,  skip = 0 ;  // else send repeat code
+		} else { // requested 'repeat'
+			if (rpt)   len = rpt  * 2,  skip = 0 ;  // if rpt exists send it
+			else       len = once * 2,  skip = 0 ;  // else send once code
+		}
+	} else {  // Send what we asked for, do not fallback if the code is empty!
+		if (!repeat)  len = once * 2,  skip = 0 ;     // 'once' starts at 0
+		else          len = rpt  * 2,  skip = once ;  // 'repeat' starts where 'once' ends
+    }
+
+	// Skip to start of code
+	for (i = 0;  i < skip;  i++, cp += 4)  byp(&cp) ;
+
+	// Send code
+	enableIROut(freq);
+	for (i = 0;  i < len;  i++) {
+		byp(&cp);
+		if (i & 1)  space(htow(cp) * usec);
+		else        mark (htow(cp) * usec);
+		cp += 4;
+	}
+}
+
+//+=============================================================================
+#if TEST
+
+int  main ( )
+{
+	char  prontoTest[] =
+		"0000 0070 0000 0032 0080 0040 0010 0010 0010 0030 " //  10
+		"0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 " //  20
+		"0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 " //  30
+		"0010 0010 0010 0030 0010 0010 0010 0010 0010 0010 " //  40
+		"0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 " //  50
+		"0010 0010 0010 0030 0010 0010 0010 0010 0010 0010 " //  60
+		"0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 " //  70
+		"0010 0010 0010 0030 0010 0010 0010 0030 0010 0010 " //  80
+		"0010 0010 0010 0030 0010 0010 0010 0010 0010 0030 " //  90
+		"0010 0010 0010 0030 0010 0010 0010 0010 0010 0030 " // 100
+		"0010 0030 0010 0aa6";                               // 104
+
+	sendPronto(prontoTest, PRONTO_ONCE,   PRONTO_FALLBACK);    // once code
+	sendPronto(prontoTest, PRONTO_REPEAT, PRONTO_FALLBACK);    // repeat code
+	sendPronto(prontoTest, PRONTO_ONCE,   PRONTO_NOFALLBACK);  // once code
+	sendPronto(prontoTest, PRONTO_REPEAT, PRONTO_NOFALLBACK);  // repeat code
+
+	return 0;
+}
+
+#endif // TEST
+
+#endif // SEND_PRONTO
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+#if 0
+//******************************************************************************
+// Sources:
+//   http://www.remotecentral.com/features/irdisp2.htm
+//   http://www.hifi-remote.com/wiki/index.php?title=Working_With_Pronto_Hex
+//******************************************************************************
+
+#include <stdint.h>
+#include <stdio.h>
+
+#define IRPRONTO
+#include "IRremoteInt.h"  // The Arduino IRremote library defines USECPERTICK
+
+//------------------------------------------------------------------------------
+// Source: https://www.google.co.uk/search?q=DENON+MASTER+IR+Hex+Command+Sheet
+//         -> http://assets.denon.com/documentmaster/us/denon%20master%20ir%20hex.xls
+//
+char  prontoTest[] =
+	"0000 0070 0000 0032 0080 0040 0010 0010 0010 0030 " //  10
+	"0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 " //  20
+	"0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 " //  30
+	"0010 0010 0010 0030 0010 0010 0010 0010 0010 0010 " //  40
+	"0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 " //  50
+	"0010 0010 0010 0030 0010 0010 0010 0010 0010 0010 " //  60
+	"0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 " //  70
+	"0010 0010 0010 0030 0010 0010 0010 0030 0010 0010 " //  80
+	"0010 0010 0010 0030 0010 0010 0010 0010 0010 0030 " //  90
+	"0010 0010 0010 0030 0010 0010 0010 0010 0010 0030 " // 100
+	"0010 0030 0010 0aa6";                               // 104
+
+//------------------------------------------------------------------------------
+// This is the longest code we can support
+#define CODEMAX  200
+
+//------------------------------------------------------------------------------
+// This is the data we pull out of the pronto code
+typedef
+	struct {
+		int        freq;           // Carrier frequency (in Hz)
+		int        usec;           // uSec per tick (based on freq)
+
+		int        codeLen;        // Length of code
+		uint16_t   code[CODEMAX];  // Code in hex
+
+		int        onceLen;        // Length of "once" transmit
+		uint16_t*  once;           // Pointer to start within 'code'
+
+		int        rptLen;         // Length of "repeat" transmit
+		uint16_t*  rpt;            // Pointer to start within 'code'
+	}
+pronto_t;
+
+//------------------------------------------------------------------------------
+// From what I have seen, the only time we go over 8-bits is the 'space'
+// on the end which creates the lead-out/inter-code gap.  Assuming I'm right,
+// we can code this up as a special case and otherwise halve the size of our
+// data!
+// Ignoring the first four values (the config data) and the last value
+// (the lead-out), if you find a protocol that uses values greater than 00fe
+// we are going to have to revisit this code!
+//
+//
+// So, the 0th byte will be the carrier frequency in Khz (NOT Hz)
+//      "  1st  "    "   "   "  length of the "once" code
+//      "  2nd  "    "   "   "  length of the "repeat" code
+//
+// Thereafter, odd  bytes will be Mark  lengths as a multiple of USECPERTICK uS
+//             even   "     "  "  Space    "    "  "    "     "       "      "
+//
+// Any occurence of "FF" in either a Mark or a Space will indicate
+//   "Use the 16-bit FF value" which will also be a multiple of USECPERTICK uS
+//
+//
+// As a point of comparison, the test code (prontoTest[]) is 520 bytes
+// (yes, more than 0.5KB of our Arduino's precious 32KB) ... after conversion
+// to pronto hex that goes down to ((520/5)*2) = 208 bytes ... once converted to
+// our format we are down to ((208/2) -1 -1 +2) = 104 bytes
+//
+// In fariness this is still very memory-hungry
+// ...As a rough guide:
+//   10 codes cost 1K of memory (this will vary depending on the protocol).
+//
+// So if you're building a complex remote control, you will probably need to
+// keep the codes on an external memory device (not in the Arduino sketch) and
+// load them as you need them.  Hmmm.
+//
+// This dictates that "Oscillated Pronto Codes" are probably NOT the way forward
+//
+// For example, prontoTest[] happens to be: A 48-bit IR code in Denon format
+// So we know it starts with 80/40                           (Denon header)
+//             and ends with 10/aa6                          (Denon leadout)
+//             and all (48) bits in between are either 10/10 (Denon 0)
+//                                                  or 10/30 (Denon 1)
+// So we could easily store this data in 1-byte  ("Denon")
+//                                     + 1-byte  (Length=48)
+//                                     + 6-bytes (IR code)
+// At 8-bytes per code, we can store 128 codes in 1KB or memory - that's a lot
+// better than the 2 (two) we started off with!
+//
+// And serendipitously, by reducing the amount of data, our program will run
+// a LOT faster!
+//
+// Again, I repeat, even after you have spent time converting the "Oscillated
+// Pronto Codes" in to IRremote format, it will be a LOT more memory-hungry
+// than using sendDenon() (or whichever) ...BUT these codes are easily
+// available on the internet, so we'll support them!
+//
+typedef
+	struct {
+		uint16_t   FF;
+		uint8_t    code[CODEMAX];
+	}
+irCode_t;
+
+//------------------------------------------------------------------------------
+#define DEBUGF(...)  printf(__VA_ARGS__)
+
+//+=============================================================================
+// String must be block of 4 hex digits separated with blanks
+//
+bool  validate (char* cp,  int* len)
+{
+	for (*len = 0;  *cp;  (*len)++, cp += 4) {
+		byp(&cp);
+		if ( !ishex(cp[0]) || !ishex(cp[1]) ||
+		     !ishex(cp[2]) || !ishex(cp[3]) || !isblank(cp[4]) )  return false ;
+	}
+
+	return true;
+}
+
+//+=============================================================================
+// Hex-to-Byte : Decode a hex digit
+// We assume the character has already been validated
+//
+uint8_t  htob (char ch)
+{
+	if ((ch >= '0') && (ch <= '9'))  return ch - '0' ;
+	if ((ch >= 'A') && (ch <= 'F'))  return ch - 'A' + 10 ;
+	if ((ch >= 'a') && (ch <= 'f'))  return ch - 'a' + 10 ;
+}
+
+//+=============================================================================
+// Hex-to-Word : Decode a block of 4 hex digits
+// We assume the string has already been validated
+//   and the pointer being passed points at the start of a block of 4 hex digits
+//
+uint16_t  htow (char* cp)
+{
+	return ( (htob(cp[0]) << 12) | (htob(cp[1]) <<  8) |
+             (htob(cp[2]) <<  4) | (htob(cp[3])      )  ) ;
+}
+
+//+=============================================================================
+// Convert the pronto string in to data
+//
+bool  decode (char* s,  pronto_t* p,  irCode_t* ir)
+{
+	int    i, len;
+	char*  cp;
+
+	// Validate the Pronto string
+	if (!validate(s, &p->codeLen)) {
+		DEBUGF("Invalid pronto string\n");
+		return false ;
+    }
+	DEBUGF("Found %d hex codes\n", p->codeLen);
+
+	// Allocate memory to store the decoded string
+	//if (!(p->code = malloc(p->len))) {
+	//	DEBUGF("Memory allocation failed\n");
+	//	return false ;
+	//}
+
+	// Check in case our code is too long
+	if (p->codeLen > CODEMAX) {
+		DEBUGF("Code too long, edit CODEMAX and recompile\n");
+		return false ;
+	}
+
+	// Decode the string
+	cp = s;
+	for (i = 0;  i < p->codeLen;  i++, cp += 4) {
+		byp(&cp);
+		p->code[i] = htow(cp);
+	}
+
+	// Announce our findings
+	DEBUGF("Input: |%s|\n", s);
+	DEBUGF("Found: |");
+    for (i = 0;  i < p->codeLen;  i++)  DEBUGF("%04x ", p->code[i]) ;
+	DEBUGF("|\n");
+
+	DEBUGF("Form [%04X] : ", p->code[0]);
+	if      (p->code[0] == 0x0000)  DEBUGF("Oscillated (Learned)\n");
+	else if (p->code[0] == 0x0100)  DEBUGF("Unmodulated\n");
+	else                            DEBUGF("Unknown\n");
+    if (p->code[0] != 0x0000)  return false ;  // Can only handle Oscillated
+
+	// Calculate the carrier frequency (+/- 10%) & uSecs per pulse
+	// Pronto uses a crystal which generates a timeabse of 0.241246
+	p->freq     = (int)(1000000 / (p->code[1] * 0.241246));
+	p->usec     = (int)(((1.0 / p->freq) * 1000000) + 0.5);
+	ir->code[0] = p->freq / 1000;
+    DEBUGF("Freq [%04X] : %d Hz  (%d uS/pluse) -> %d KHz\n",
+	       p->code[1], p->freq, p->usec, ir->code[0]);
+
+	// Set the length & start pointer for the "once" code
+	p->onceLen  = p->code[2];
+	p->once     = &p->code[4];
+	ir->code[1] = p->onceLen;
+	DEBUGF("Once [%04X] : %d\n", p->code[2], p->onceLen);
+
+	// Set the length & start pointer for the "repeat" code
+	p->rptLen = p->code[3];
+	p->rpt    = &p->code[4 + p->onceLen];
+	ir->code[2] = p->rptLen;
+	DEBUGF("Rpt  [%04X] : %d\n", p->code[3], p->rptLen);
+
+	// Check everything tallies
+	if (1 + 1 + 1 + 1 + (p->onceLen * 2) + (p->rptLen * 2) != p->codeLen) {
+		DEBUGF("Bad code length\n");
+		return false;
+	}
+
+	// Convert the IR data to our new format
+	ir->FF = p->code[p->codeLen - 1];
+
+	len = (p->onceLen * 2) + (p->rptLen * 2);
+	DEBUGF("Encoded: |");
+	for (i = 0;  i < len;  i++) {
+		if (p->code[i+4] == ir->FF) {
+			ir->code[i+3] = 0xFF;
+		} else if (p->code[i+4] > 0xFE) {
+			DEBUGF("\n%04X : Mark/Space overflow\n", p->code[i+4]);
+			return false;
+		} else {
+			ir->code[i+3] = (p->code[i+4] * p->usec) / USECPERTICK;
+		}
+		DEBUGF("%s%d", !i ? "" : (i&1 ? "," : ", "), ir->code[i+3]);
+	}
+	DEBUGF("|\n");
+
+	ir->FF = (ir->FF * p->usec) / USECPERTICK;
+	DEBUGF("FF -> %d\n", ir->FF);
+
+	return true;
+}
+
+//+=============================================================================
+//
+void  irDump (irCode_t* ir)
+{
+	int  i, len;
+
+	printf("uint8_t  buttonName[%d] = {", len);
+
+	printf("%d,%d, ", (ir->FF >> 8), ir->FF & 0xFF);
+	printf("%d,%d,%d, ", ir->code[0], ir->code[1], ir->code[2]);
+
+	len = (ir->code[1] * 2) + (ir->code[2] * 2);
+	for (i = 0;  i < len;  i++) {
+		printf("%s%d", !i ? "" : (i&1 ? "," : ", "), ir->code[i+3]);
+	}
+
+	printf("};\n");
+
+}
+
+//+=============================================================================
+//
+int  main ( )
+{
+	pronto_t  pCode;
+	irCode_t  irCode;
+
+	decode(prontoTest, &pCode, &irCode);
+
+	irDump(&irCode);
+
+	return 0;
+}
+
+#endif //0