Diff: ISP.cpp
- Revision:
- 0:15536fa79743
- Child:
- 1:0872c208795f
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ISP.cpp Tue Sep 27 15:44:55 2011 +0000
@@ -0,0 +1,180 @@
+#include "mbed.h"
+#include "LPC.h"
+
+Serial pc(USBTX, USBRX);
+LocalFileSystem local("fs");
+
+int SerialBuffered::ProgramFile(char *fname) {
+ sum20 = 0; readAll = false; bytesfilled=45; lines=1; firstencode = true;
+ char str0[] = "0"; //Command success string
+ char strRAM[] = "W 268435968 1024"; //Command to state that the following 1024 bytes should be written to RAM
+
+ //Following arrays contain addresses and the size of the addresses
+ int sector[30] = {4096, 4096, 4096, 4096, 4096, 4096, 4096, 4096, 4096, 4096, 4096, 4096, 4096, 4096, 4096, 4096, 32768, 32768, 32768, 32768, 32768, 32768, 32768, 32768, 32768, 32768, 32768, 32768, 32768, 32768};
+ int startadd[30] = {0x0, 0x1000, 0x2000, 0x3000, 0x4000, 0x5000, 0x6000, 0x7000, 0x8000, 0x9000, 0xA000, 0xB000, 0xC000, 0xD000, 0xE000, 0xF000, 0x10000, 0x18000, 0x20000, 0x28000, 0x30000, 0x38000, 0x40000, 0x48000, 0x50000, 0x58000, 0x60000, 0x68000, 0x70000, 0x78000};
+
+ pc.printf("**** LPC1xxx Flash Bootloader ****\n\n\r");
+ if(CheckTargetPresent()==0) {
+ pc.printf("ERROR: Communication failed with board. Ensure board reset and P2.10 pulled low before running mbed program!\r\n\n");
+ exit(0);
+ }
+
+ f = fopen(fname, "r"); //Opens the binary file for reading
+ if (f == NULL) {
+ pc.printf("ERROR: File not found. Ensure file exists in the mbed's local filesystem and is spelt correctly in the main.cpp\n\n\r");
+ exit(0);
+ return 1;
+ }
+ else pc.printf("%s opened successfully\n\n\r", fname);
+
+ TargetSendStringAndCR(strRAM);
+ readBytes(buf, 3);
+ if ( strncmp(buf,str0, 1) != 0 )
+ return 0;
+
+ pc.printf("Writing to chip (may take a couple of minutes)");
+
+ FirstEncode();
+ TargetSendString(uuline);
+ fclose(f);
+ f = fopen(fname, "r");
+ fseek(f, 45, SEEK_SET); //Skip forward past the 45 bytes already encoded in FirstEncode()
+ remove("/fs/delete.bin"); //Remove temporary file
+
+ int summation=0;
+ for (int i=0; i<30; i++) { //Works out number of sectors required and compares it with number available
+ summation+=sector[i];
+ if (summation>=filesize) {
+ maxsector = i;
+ break;
+ }
+ }
+ if (lastSector<maxsector) {
+ pc.printf("ERROR: File size too large for available FLASH memory\n\r");
+ exit(0);
+ }
+
+ int totalloaded=0;
+ for (int b=0; b<=maxsector; b++) {
+ int data = sector[b];
+ while (data>0) {
+ SectorFill(startadd[b]+(sector[b]-data));
+ data-=1024;
+ totalloaded+=1024;
+ if (totalloaded>=filesize)
+ break;
+ }
+ }
+
+ fclose(f);
+ pc.printf("\n\n\rFLASH COMPLETED!\n\n\r");
+ return 0;
+}
+
+int SerialBuffered::SectorFill(int add) {
+ char strRAM[] = "W 268435968 1024";
+ char sendStr[64];
+ char str0[] = "0";
+
+ if (!firstencode) {
+ TargetSendStringAndCR(strRAM);
+ readBytes(buf, 3);
+ }
+ firstencode = false;
+
+ while (bytesfilled<1024) {
+ if (bytesfilled>=990) { //If not enough room for a full UUEncoded line use EndUUEncode()
+ EndUUEncode();
+ TargetSendString(enduuline);
+ sprintf(sendStr, "%d\0", sum20);
+ TargetSendStringAndCR(sendStr);
+ readBytes(buf, 10);
+ pc.printf(".");
+ break;
+ }
+ UUEncode();
+ TargetSendString(uuline);
+ bytesfilled+=45;
+ lines++;
+ if (lines==20) {
+ sprintf(sendStr, "%d\0", sum20); //Checksum
+ TargetSendStringAndCR(sendStr);
+ readBytes(buf, 4);
+ sum20=0; lines=0;
+ }
+ }
+
+ sprintf(sendStr, "P 0 %d", lastSector); //Fills the sendStr string with the prepare function specific to the chip as specified in the switch function
+ TargetSendStringAndCR(sendStr); //Prepares the Flash for writing to
+ readBytes(buf, 3);
+ if (strncmp(buf,str0,1)!=0)
+ return 0;
+
+ sprintf(sendStr, "C %d 268435968 1024", add); //Copies data from the RAM to FLASH
+ TargetSendStringAndCR(sendStr);
+ readBytes(buf, 3);
+ bytesfilled = 0; lines=0; sum20=0;
+ return 0;
+}
+
+int SerialBuffered::CheckTargetPresent() { //Synchronises the board with the mbed and prepares the RAM for writing to
+ char strQn[] = "?";
+ char str0[] = "0";
+ char strSpeed[] = "4000";
+ char strJ[] = "J";
+ char strEcho[] = "A 0";
+ char strSync[] = "Synchronized";
+ char strOk[] = "OK";
+ char strUnlock[] = "U 23130";
+ char sendStr[64];
+
+ TargetSendString(strQn); //Sends a question mark and looks for "Synchronized" (wish it was spelt with an 's') to be returned
+ readBytes(buf, 14);
+ if (strncmp(buf,strSync, 12) != 0 )
+ return 0;
+ TargetSendStringAndCR(strSync); //Sends "Synchronized" back and looks for "OK" to be returned
+ readBytes(buf, 17);
+ if (strcspn(buf,strOk) == 17 )
+ return 0;
+
+ TargetSendStringAndCR(strSpeed); //Sends "0" and waits for "OK" to be returned
+ readBytes(buf, 5+strlen(strSpeed));
+ if ( strcspn(buf,strOk) == 5+strlen(strSpeed) )
+ return 0;
+
+ TargetSendStringAndCR(strEcho);
+ readBytes(buf,7);
+ if (strcspn(buf,str0) == 7 )
+ return 0;
+
+ TargetSendStringAndCR(strJ); //Sends "J" (ID code request) and reads the returned int
+ readBytes(buf, 3);
+ if (strncmp(buf,str0,1) != 0 )
+ return 0;
+ readBytes(buf, 11);
+ for (int i=0; i<9; i++)
+ id = (id*10)+buf[i]-'0';
+
+ IDCheck(id);
+ pc.printf("Chip to bootload: %s\n\r", strChipType);
+
+ TargetSendStringAndCR(strUnlock); //Unlocks the Flash for writing to
+ readBytes(buf, 3);
+ if ( strncmp(buf,str0,1) != 0 )
+ return 0;
+
+ sprintf(sendStr, "P 0 %d", lastSector); //Fills the sendStr string with the prepare function specific to the chip as specified in the switch function
+ TargetSendStringAndCR(sendStr); //Prepares the Flash for writing to
+ readBytes(buf, 3);
+ if ( strncmp(buf,str0,1) != 0 )
+ return 0;
+
+ sprintf(sendStr, "E 0 %d", lastSector);
+ TargetSendStringAndCR(sendStr); //Erases the Flash completely, ready to be loaded
+ readBytes(buf, 3);
+ if ( strncmp(buf,str0,1) != 0 )
+ return 0;
+
+ pc.printf("Ready to write to chip...\n\r");
+ return 1;
+}
\ No newline at end of file
William Reynolds