Diff: Picaso_4DGL-32PTU_Media.cpp

Revision:

12:29f5ad896382

Child:

13:1a0800957412

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Picaso_4DGL-32PTU_Media.cpp	Wed Sep 14 13:27:37 2016 +0000
@@ -0,0 +1,163 @@
+//
+//  Picaso_4DGL-32PTU is a class to drive 4D Systems TFT touch screens with PICASO processor
+//  Tested with NUCLEO L152RE development board
+//  Copyright (C) <2016> Rihards Balass <rihards.balass@gmail.com>
+//
+// Picaso_4DGL-32PTU is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Picaso_4DGL-32PTU is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You can see GNU General Public License at <http://www.gnu.org/licenses/>.
+//
+
+#include "mbed.h"
+#include "Picaso_4DGL-32PTU.h"
+
+//**************************************************************************
+// The Media Init command initialises a uSD/SD/SDHC memory card for further operations.
+// The SD card is connected to the SPI (serial peripheral interface) of the PICASO-GFX2 chip.
+//**************************************************************************
+short PICASO_4DGL :: media_Init() {
+
+    char command[2] = "";
+    
+    command[0] = (MEDIA_INIT >> (8*1)) & 0xff;
+    command[1] = (MEDIA_INIT >> (8*0)) & 0xff;
+    
+    writeCOMMAND(command, 2);
+    short success = mediaInitResponse();
+#ifdef DEBUGMODE
+    pc.printf("\n\r DEBUG: uSD card INIT: %i\n\r", success);
+#endif
+    return success;
+}
+
+//**************************************************************************
+// The Set Byte Address command sets the media memory internal 
+// Address pointer for access at a non-sector aligned byte address.
+//**************************************************************************
+bool PICASO_4DGL :: media_SetAdd(int address) {
+
+    char command[6] = "";
+    
+    command[0] = (MEDIA_SET_ADD >> (8*1)) & 0xff;
+    command[1] = (MEDIA_SET_ADD >> (8*0)) & 0xff;
+    command[2] = (address >> (8*3)) & 0xff;
+    command[3] = (address >> (8*2)) & 0xff;
+    command[4] = (address >> (8*1)) & 0xff;
+    command[5] = (address >> (8*0)) & 0xff;
+    
+    writeCOMMAND(command, 6);
+    bool success = getResponse(1);
+#ifdef DEBUGMODE
+    pc.printf("\n\r DEBUG: Set byte address: %i\n\r", success);
+#endif
+    return success;
+}
+
+//**************************************************************************
+// The Set Sector Address command sets the media memory internal Address pointer for sector access.
+//**************************************************************************
+bool PICASO_4DGL :: media_SetSector(int address) {
+
+    char command[6] = "";
+    
+    command[0] = (MEDIA_SET_SECTOR >> (8*1)) & 0xff;
+    command[1] = (MEDIA_SET_SECTOR >> (8*0)) & 0xff;
+    command[2] = (address >> (8*3)) & 0xff;
+    command[3] = (address >> (8*2)) & 0xff;
+    command[4] = (address >> (8*1)) & 0xff;
+    command[5] = (address >> (8*0)) & 0xff;
+    
+    writeCOMMAND(command, 6);
+    bool success = getResponse(1);
+#ifdef DEBUGMODE
+    pc.printf("\n\r DEBUG: Set sector address: %i\n\r", success);
+#endif
+    return success;
+}
+
+//**************************************************************************
+// The Read Sector command reads and returns 512 bytes (256 words) 
+// pointed to by the internal Sector pointer, determined by the 
+// “Set Sector Address” command. 
+// After the read the Sector pointer is automatically incremented by 1.
+// Answer = acknowledge (byte) , status (word), block (sector) = 1 + 2 + 512 = 515 bytes
+//**************************************************************************
+bool PICASO_4DGL :: media_ReadSector() {
+
+    char command[2] = "";
+    
+    command[0] = (MEDIA_READ_SECTOR >> (8*1)) & 0xff;
+    command[1] = (MEDIA_READ_SECTOR >> (8*0)) & 0xff;
+    
+    writeCOMMAND(command, 2);
+    bool success = readSectorResponse(515);
+#ifdef DEBUGMODE
+    pc.printf("\n\r DEBUG: Set sector address: %i\n\r", success);
+#endif
+    return success;
+}
+
+//**************************************************************************
+// The Write Sector command writes 512 bytes (256 words) from a source memory 
+// block into the uSD card. After the write the Sect pointer is automatically incremented by 1.
+// Response = acknowledge (byte) , status (word)
+//**************************************************************************
+bool PICASO_4DGL :: media_WriteSector(char *block) {
+
+    char command[514] = "";
+    
+    command[0] = (MEDIA_WRITE_SECTOR >> (8*1)) & 0xff;
+    command[1] = (MEDIA_WRITE_SECTOR >> (8*0)) & 0xff;
+    
+    int j = 2;
+    int k = 0;
+    for (int i = 513; i < 0; i++) {
+        command[j] = block
+    
+    writeCOMMAND(command, 2);
+    bool success = readSectorResponse(515);
+#ifdef DEBUGMODE
+    pc.printf("\n\r DEBUG: Set sector address: %i\n\r", success);
+#endif
+    return success;
+}
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