From b9fc5fed91512208d861e287b1369f3122861144 Mon Sep 17 00:00:00 2001
From: David Phillips <dbphillipsnz@gmail.com>
Date: Wed, 20 Jan 2016 14:03:21 +1300
Subject: Initial import

---
 casio-get.c | 129 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 casio-get.c

(limited to 'casio-get.c')

diff --git a/casio-get.c b/casio-get.c
new file mode 100644
index 0000000..9beb87f
--- /dev/null
+++ b/casio-get.c
@@ -0,0 +1,129 @@
+#include "casio-get.h"
+
+#define SMALL_PACKET_WAIT 100
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+void print_checksum_msg(unsigned char expected, unsigned short actual)
+{
+	fprintf(stderr, "Checksum\t: %s (needed 0x%x, found 0x%x)\n", expected==actual? "OK" : "BAD", expected, actual);
+}
+
+int main()
+{
+	unsigned int read;
+	unsigned char temp_buffer[1024];
+	unsigned char rx_buffer[65536];
+
+	setbuf(stdout, NULL);
+	memset(rx_buffer, 0, sizeof(rx_buffer));
+
+	long expected;
+	unsigned int x,y;
+	
+	unsigned char colours = 3;
+	unsigned char colour;
+	unsigned int i;
+	struct sp_port *port;
+	port = port_init("/dev/ttyUSB0");
+
+	// Wait for calculator and ACK
+	wait_calc(port);
+	send_calc_byte(port, ATTENTION_ACK);
+	fprintf(stderr,"Sent 0x%x (ACK)\n",ATTENTION_ACK);
+
+
+
+	/*******************************************
+	 * Receive header packet
+	 *******************************************/
+	read = calc_read(port, rx_buffer, PKT_HEADER_MAX_SIZE);
+	fprintf(stderr, "\n== HEADER ========================================\n");
+	fprintf(stderr, "Size (bytes)\t: %d\n", read);
+	
+	unsigned char sum_expected = rx_buffer[read-1];
+	unsigned char sum = calculate_checksum((const char*)rx_buffer+1, (const char*)rx_buffer+read-1);
+
+	print_checksum_msg(sum_expected, sum);
+
+	for(i = 0; i < read; i++)
+		printf("%c", (unsigned char)rx_buffer[i]);
+
+	colours = 3;
+
+	switch (get_packet_type(rx_buffer))
+	{
+		/* Screenshot (F<->D button) */
+		case PKT_SCREEN_HEADER_BW:
+			colours = 1;
+		case PKT_SCREEN_HEADER_COL:
+			send_calc_byte(port, MISC_ACK);
+			x = rx_buffer[4];
+			y = rx_buffer[3];
+			expected = (x*y)/8 + 2;
+			
+			/* multi-colour images have an extra byte per colour frame for colour identification */
+			if (colours > 1)
+				expected++;
+			fprintf(stderr,
+					"Data type\t: Screen dump\n"
+					"Dimensions\t: %d x %d\n", x,y);
+
+			fprintf(stderr, "\n== DATA ==========================================\n");
+			
+			for (colour = 0; colour < colours; colour++)
+			{
+				read = calc_read(port, rx_buffer, expected);
+				fprintf(stderr,"Colour %d/%d read\t: %d bytes\n", colour+1, colours, read);
+				for(i = 0; i < read; i++)
+					printf("%c", rx_buffer[i]);
+				
+				sum_expected = rx_buffer[read-1];
+				sum = calculate_checksum((const char*)rx_buffer+1+(colours > 1), (const char*)rx_buffer+read-1);
+				print_checksum_msg(sum_expected, sum);
+				
+				send_calc_byte(port, MISC_ACK);
+			
+			}
+			break;
+		
+		/* Full memory backup */
+		case PKT_BACKUP_HEADER:
+			/* Get firmware name (starts at byte 27 and is hival-terminated */
+			i = 27;
+			while((rx_buffer[i] != 0xff) && i < sizeof(temp_buffer))
+			{
+				temp_buffer[i-27] = rx_buffer[i];
+				i++;
+			}
+			temp_buffer[i-27] = '\0';
+
+			fprintf(stderr, "Memory backup coming (firmware %s)...\n", temp_buffer);
+			break;
+		case PKT_FUNCTION_HEADER:
+			fprintf(stderr, "Function(s) coming...\nNOT IMPLEMENTED\n");
+			break;
+		case PKT_VALUE_HEADER:
+			fprintf(stderr, "Value coming...\nNOT IMPLEMENTED\n");
+			//break;
+		case PKT_PROGRAM_HEADER:
+			fprintf(stderr, "Program coming...\nNOT IMPLEMENTED\n");
+			//break;
+		default:
+			fprintf(stderr, "List(s) coming...\n");
+			fprintf(stderr, "Matrix/Matrices coming...\n");
+			fprintf(stderr, "NOT IMPLEMENTEEEED, NOT ANNYYYY OF THIIIIIIS!!!\n");
+			break;
+	}
+
+
+
+
+	sp_close(port);
+
+
+	return 0;
+}
-- 
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