Update demos and add note about them.

README.md

@@ -27,3 +27,11 @@ It enumerates as 2 interfaces.
 1. the usb serial port built in.
 
 If you want to mess with the programming code in Windows, you will have to install WinUSB to the interface 0.  Then you can uninstall it in Device Manager under USB Devices.
+
+## miniwchlink
+
+I wrote some libusb copies of some of the basic functionality from WCH-Link, so you can use the little programmer dongle they give you to program the ch32v003. 
+
+Currently, it ignores all the respone codes, except when querying the chip.  But it's rather surprising how featured I could get in about 5 hours.
+
+Anyone who wants to write a good/nice utility should probably look at the code in this folder.

minichlink/wch_link_base.h

@@ -5,7 +5,7 @@
 
 #include "libusb.h"
 
-#define WCHTIMEOUT 1000
+#define WCHTIMEOUT 5000
 #define WCHCHECK(x) if( status = x ) { fprintf( stderr, "Bad USB Operation on line %d (%d)\n", __LINE__, status ); exit( status ); }
 
 static inline libusb_device_handle * wch_link_base_setup()

minichlink/wch_write_demo.c

 #include <stdio.h>
 #include "wch_link_base.h"
 
-// UNTESTED
+// TESTED BUT FLAKEY.
 // Flashes a "hummer" to pin D0 (not an arbitrary binary).
 
 int main()

minichlink/wch_write_simple.c

+#include <stdio.h>
+#include "wch_link_base.h"
+
+// UNTESTED
+//  Having some difficulty with the base.
+
+
+int main( int argc, char ** argv )
+{
+	if( argc != 2 )
+	{
+		fprintf( stderr, "Usage: wch_write_simple [binfile]\n" );
+	}
+	
+	FILE * f = fopen( argv[1], "rb" );
+	fseek( f, 0, SEEK_END );
+	int len = ftell( f );
+	fseek( f, 0, SEEK_SET );
+	int padlen = ((len-1) & (~0x3f)) + 0x40;
+	char * image = malloc( padlen );
+	memset( image, 0xff, padlen );
+	fread( image, len, 1, f );
+	fclose( f );
+	
+	if( len > 16384 )
+	{
+		fprintf( stderr, "Error: Image for CH32V003 too large\n" );
+		return -9;
+	}
+	
+	libusb_device_handle * devh = wch_link_base_setup();
+	int transferred;
+	int status;
+	WCHCHECK( libusb_bulk_transfer( devh, 0x01, "\x81\x0d\x01\x01", 4, &transferred, WCHTIMEOUT ) ); // Checkme with BULK_IN
+	WCHCHECK( libusb_bulk_transfer( devh, 0x01, "\x81\x0c\x02\x09\x01", 5, &transferred, WCHTIMEOUT ) ); // Checkme with BULK_IN
+	WCHCHECK( libusb_bulk_transfer( devh, 0x01, "\x81\x0d\x01\x02", 4, &transferred, WCHTIMEOUT) ); // Checkme with BULK_IN
+	WCHCHECK( libusb_bulk_transfer( devh, 0x01, "\x81\x11\x01\x09", 4, &transferred, WCHTIMEOUT) ); // Checkme with BULK_IN
+	WCHCHECK( libusb_bulk_transfer( devh, 0x01, "\x81\x06\x01\x01", 4, &transferred, WCHTIMEOUT) );
+	WCHCHECK( libusb_bulk_transfer( devh, 0x01, "\x81\x06\x01\x01", 4, &transferred, WCHTIMEOUT) ); // Odd that it did it twice - maybe something took too long on the proc.
+
+	// This contains the write data quantity, in bytes.  (The last 2 octets)
+	// Then it just rollllls on in.
+	char rksbuff[11] = { 0x81, 0x01, 0x08, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+	rksbuff[9] = len >> 8;
+	rksbuff[10] = len & 0xff;
+	WCHCHECK( libusb_bulk_transfer( devh, 0x01, rksbuff, 11, &transferred, WCHTIMEOUT) ); // Still check me.
+	WCHCHECK( libusb_bulk_transfer( devh, 0x01, "\x81\x02\x01\x05", 4, &transferred, WCHTIMEOUT) ); // Last checkme til data.
+	
+	// then just stream this.  This is some sort of propreitary image.
+	WCHCHECK( libusb_bulk_transfer( devh, 0x01,
+"\x21\x11\x22\xca\x26\xc8\x93\x77\x15\x00\x99\xcf\xb7\x06\x67\x45" \
+"\xb7\x27\x02\x40\x93\x86\x36\x12\x37\x97\xef\xcd\xd4\xc3\x13\x07" \
+"\xb7\x9a\xd8\xc3\xd4\xd3\xd8\xd3\x93\x77\x25\x00\x9d\xc7\xb7\x27" \
+"\x02\x40\x98\x4b\xad\x66\x37\x33\x00\x40\x13\x67\x47\x00\x98\xcb" \
+"\x98\x4b\x93\x86\xa6\xaa\x13\x67\x07\x04\x98\xcb\xd8\x47\x05\x8b" \
+"\x63\x16\x07\x10\x98\x4b\x6d\x9b\x98\xcb\x93\x77\x45\x00\xa9\xcb" \
+"\x93\x07\xf6\x03\x99\x83\x2e\xc0\x2d\x63\x81\x76\x3e\xc4\xb7\x32" \
+"\x00\x40\xb7\x27\x02\x40\x13\x03\xa3\xaa\xfd\x16\x98\x4b\xb7\x03", 128, &transferred, WCHTIMEOUT ) );
+
+	WCHCHECK( libusb_bulk_transfer( devh, 0x01,
+"\x02\x00\x33\x67\x77\x00\x98\xcb\x02\x47\xd8\xcb\x98\x4b\x13\x67" \
+"\x07\x04\x98\xcb\xd8\x47\x05\x8b\x69\xe7\x98\x4b\x75\x8f\x98\xcb" \
+"\x02\x47\x13\x07\x07\x04\x3a\xc0\x22\x47\x7d\x17\x3a\xc4\x79\xf7" \
+"\x93\x77\x85\x00\xf1\xcf\x93\x07\xf6\x03\x2e\xc0\x99\x83\x37\x27" \
+"\x02\x40\x3e\xc4\x1c\x4b\xc1\x66\x2d\x63\xd5\x8f\x1c\xcb\x37\x07" \
+"\x00\x20\x13\x07\x07\x20\xb7\x27\x02\x40\xb7\x03\x08\x00\xb7\x32" \
+"\x00\x40\x13\x03\xa3\xaa\x94\x4b\xb3\xe6\x76\x00\x94\xcb\xd4\x47" \
+"\x85\x8a\xf5\xfe\x82\x46\xba\x84\x37\x04\x04\x00\x36\xc2\xc1\x46", 128, &transferred, WCHTIMEOUT ) );
+
+	WCHCHECK( libusb_bulk_transfer( devh, 0x01,
+"\x36\xc6\x92\x46\x84\x40\x11\x07\x84\xc2\x94\x4b\xc1\x8e\x94\xcb" \
+"\xd4\x47\x85\x8a\xb1\xea\x92\x46\xba\x84\x91\x06\x36\xc2\xb2\x46" \
+"\xfd\x16\x36\xc6\xf9\xfe\x82\x46\xd4\xcb\x94\x4b\x93\xe6\x06\x04" \
+"\x94\xcb\xd4\x47\x85\x8a\x85\xee\xd4\x47\xc1\x8a\x85\xce\xd8\x47" \
+"\xb7\x06\xf3\xff\xfd\x16\x13\x67\x07\x01\xd8\xc7\x98\x4b\x21\x45" \
+"\x75\x8f\x98\xcb\x52\x44\xc2\x44\x61\x01\x02\x90\x23\x20\xd3\x00" \
+"\xf5\xb5\x23\xa0\x62\x00\x3d\xb7\x23\xa0\x62\x00\x55\xb7\x23\xa0" \
+"\x62\x00\xc1\xb7\x82\x46\x93\x86\x06\x04\x36\xc0\xa2\x46\xfd\x16", 128, &transferred, WCHTIMEOUT ) );
+
+	WCHCHECK( libusb_bulk_transfer( devh, 0x01,
+"\x36\xc4\xb5\xf2\x98\x4b\xb7\x06\xf3\xff\xfd\x16\x75\x8f\x98\xcb" \
+"\x41\x89\x05\xcd\x2e\xc0\x0d\x06\x02\xc4\x09\x82\xb7\x07\x00\x20" \
+"\x32\xc6\x93\x87\x07\x20\x98\x43\x13\x86\x47\x00\xa2\x47\x82\x46" \
+"\x8a\x07\xb6\x97\x9c\x43\x63\x1c\xf7\x00\xa2\x47\x85\x07\x3e\xc4" \
+"\xa2\x46\x32\x47\xb2\x87\xe3\xe0\xe6\xfe\x01\x45\x61\xb7\x41\x45" \
+"\x51\xb7\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff" \
+"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff" \
+"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff", 128, &transferred, WCHTIMEOUT ) );
+
+	WCHCHECK( libusb_bulk_transfer( devh, 0x01, "\x81\x02\x01\x07", 4, &transferred, WCHTIMEOUT) ); // checkme.
+	WCHCHECK( libusb_bulk_transfer( devh, 0x01, "\x81\x02\x01\x02", 4, &transferred, WCHTIMEOUT) ); // checkme.
+
+
+	int pplace = 0;
+	for( pplace = 0; pplace < padlen; pplace += 64 )
+	{
+		WCHCHECK( libusb_bulk_transfer( devh, 0x02,image+pplace, 64, &transferred, WCHTIMEOUT ) );
+	}
+
+	// Waiting or something on 2.46.2???????
+	
+	WCHCHECK( libusb_bulk_transfer( devh, 0x01, "\x81\x0d\x01\xff", 4, &transferred, WCHTIMEOUT) ); // checkme.
+	
+
+
+	//211122ca26c89377150099cfb7066745b7270240938636123797efcdd4c31307b79ad8c3d4d3d8d3937725009dc7b7270240984bad66373300401367470098cb984b9386a6aa1367070498cbd847058b63160710984b6d9b98cb93774500a9cb9307f60399832ec02d6381763ec4b7320040b72702401303a3aafd16984bb703
+//	WCHCHECK( libusb_bulk_transfer( devh, 0x01, "\x81\x02\x01\x05", 4, &transferred, WCHTIMEOUT) );
+}