#include <ctype.h>
#include <errno.h>
+#include <unistd.h> /* for open, close */
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
#include "isp_utils.h"
extern int trace_on;
};
-#define SERIAL_BUFSIZE 128
+/* Max should be 1270 for read memory, a little bit more for writes */
+#define SERIAL_BUFSIZE 1300
#define SYNCHRO_START "?"
#define SYNCHRO "Synchronized\r\n"
#define SYNCHRO_OK "OK\r\n"
+#define DATA_BLOCK_OK "OK\r\n"
+#define DATA_BLOCK_RESEND "RESEND\r\n"
#define SYNCHRO_ECHO_OFF "A 0\r\n"
#define ISP_ABORT "\e"
#define READ_BOOT_VERSION "K\r\n"
+
char* error_codes[] = {
"CMD_SUCCESS",
"INVALID_COMMAND",
return 0;
}
+int isp_cmd_read_memory(int arg_count, char** args)
+{
+ /* Serial communication */
+ char buf[SERIAL_BUFSIZE];
+ int ret = 0, len = 0;
+ /* Arguments */
+ unsigned long int addr = 0, count = 0;
+ char* out_file_name = NULL;
+ int out_fd = -1;
+ /* Reply handling */
+ unsigned int lines = 0, blocks = 0;
+ unsigned int total_bytes_received = 0;
+ unsigned int i = 0;
+
+ /* Check read-memory arguments */
+ if (arg_count != 3) {
+ printf("read-memory command needs address and count. Both must be multiple of 4.\n");
+ return -12;
+ }
+ addr = strtoul(args[0], NULL, 0);
+ count = strtoul(args[1], NULL, 0);
+ if (trace_on) {
+ printf("read-memory command called for 0x%08lx (%lu) bytes at address 0x%08lx.\n",
+ count, count, addr);
+ }
+ if ((addr & 0x03) || (count & 0x03)) {
+ printf("Address and count must be multiple of 4 for read-memory command.\n");
+ return -11;
+ }
+ out_file_name = args[2];
+
+ /* Create read-memory request */
+ len = snprintf(buf, SERIAL_BUFSIZE, "R %lu %lu\r\n", addr, count);
+ if (len > SERIAL_BUFSIZE) {
+ len = SERIAL_BUFSIZE; /* This should not happen if SERIAL_BUFSIZE is 32 or more ... */
+ }
+
+ /* Send read-memory request */
+ if (isp_serial_write(buf, len) != len) {
+ printf("Unable to send read-memory request.\n");
+ return -10;
+ }
+ /* And receive and decode the answer */
+ usleep( 2000 );
+ /* First, check return code. This will also remove the first 3 caracters from the
+ * reply so we get only interresting caracters in the buffer. */
+ len = isp_serial_read(buf, 3, 3);
+ if (len <= 0) {
+ printf("Error reading memory.\n");
+ return -9;
+ }
+ ret = isp_ret_code(buf, NULL);
+ if (ret != 0) {
+ printf("Error when trying to read %lu bytes of memory at address 0x%08lx.\n", count, addr);
+ return -8;
+ }
+
+ /* Now, find the number of lines and the length of the reply.
+ * See section 21.4.3 of LPC11xx user's manual (UM10398) */
+#define LINE_DATA_LENGTH 45
+#define LINES_PER_BLOCK 20
+#define MAX_DATA_BLOCK_SIZE (LINES_PER_BLOCK * LINE_DATA_LENGTH) /* 900 */
+#define MAX_BYTES_PER_LINE (((LINE_DATA_LENGTH / 3) * 4) + 1 + 2) /* 60 + "line length" + \r\n */
+#define FILE_CREATE_MODE (S_IRUSR | S_IWUSR | S_IRGRP)
+ lines = (count / LINE_DATA_LENGTH);
+ if (count % LINE_DATA_LENGTH) {
+ lines += 1;
+ }
+ blocks = (lines / LINES_PER_BLOCK);
+ if (lines % LINES_PER_BLOCK) {
+ blocks += 1;
+ }
+ if (trace_on) {
+ printf("Reading %d block(s) (%d line(s)).\n", blocks, lines);
+ }
+ /* Open file for writing if output is not stdout */
+ if (strncmp(out_file_name, "-", strlen(out_file_name)) == 0) {
+ out_fd = STDOUT_FILENO;
+ } else {
+ out_fd = open(out_file_name, (O_WRONLY | O_CREAT | O_TRUNC), FILE_CREATE_MODE);
+ if (out_fd <= 0) {
+ perror("Unable to open or create file for writing");
+ printf("Tried to open \"%s\".\n", out_file_name);
+ return -7;
+ }
+ }
+
+ ret = 0;
+ /* Receive and decode the data */
+ for (i=0; i<blocks; i++) {
+ char data[SERIAL_BUFSIZE];
+ unsigned int blocksize = 0, decoded_size = 0;
+ unsigned int received_checksum = 0, computed_checksum = 0;
+ static int resend_request_for_block = 0;
+ unsigned int j = 0;
+
+ /* Read the uuencoded data */
+ if ((count - total_bytes_received) >= MAX_DATA_BLOCK_SIZE) {
+ blocksize = (MAX_BYTES_PER_LINE * LINES_PER_BLOCK);
+ if (trace_on) {
+ printf("Reading block %d (%d line(s)).\n", i, LINES_PER_BLOCK);
+ }
+ } else {
+ unsigned int remain = count - total_bytes_received;
+ unsigned int nb_last_lines = (remain / LINE_DATA_LENGTH);
+ if (remain % LINE_DATA_LENGTH) {
+ nb_last_lines += 1;
+ }
+ /* 4 bytes transmitted for each 3 data bytes */
+ blocksize = ((remain / 3) * 4);
+ if (remain % 3) {
+ blocksize += 4;
+ }
+ /* Add one byte per line for the starting "length character" and two bytes per
+ * line for the ending "\r\n" */
+ blocksize += (3 * nb_last_lines);
+ if (trace_on) {
+ printf("Reading block %d of size %u (%d line(s)).\n", i, blocksize, nb_last_lines);
+ }
+ }
+ len = isp_serial_read(buf, SERIAL_BUFSIZE, blocksize);
+ if (len <= 0) {
+ printf("Error reading memory.\n");
+ ret = -6;
+ break;
+ }
+ usleep( 1000 );
+ /* Now read the checksum, maybe not yet received */
+ len += isp_serial_read((buf + len), (SERIAL_BUFSIZE - len), ((len > (int)blocksize) ? 0 : 3));
+ if (len < 0) { /* Length may be null, as may already have received everything */
+ printf("Error reading memory (checksum part).\n");
+ ret = -5;
+ break;
+ }
+ /* Decode. This must be done before sending acknowledge because we must
+ * compute the checksum */
+ decoded_size = isp_uu_decode(data, buf, blocksize);
+ received_checksum = strtoul((buf + blocksize), NULL, 10);
+ for (j=0; j<decoded_size; j++) {
+ computed_checksum += (unsigned char)data[j];
+ }
+ if (trace_on) {
+ printf("Decoded Data :\n");
+ isp_dump((unsigned char*)data, decoded_size);
+ }
+ if (computed_checksum == received_checksum) {
+ resend_request_for_block = 0; /* reset resend request counter */
+ if (trace_on) {
+ printf("Reading of blocks %u OK, contained %u bytes\n", i, decoded_size);
+ }
+ /* Acknowledge data */
+ if (isp_serial_write(DATA_BLOCK_OK, strlen(DATA_BLOCK_OK)) != strlen(DATA_BLOCK_OK)) {
+ printf("Unable to send acknowledge.\n");
+ ret = -4;
+ break;
+ }
+ /* Add data length to sum of received data */
+ total_bytes_received += decoded_size;
+ /* Write data to file */
+ ret = write(out_fd, data, decoded_size);
+ if (ret != (int)decoded_size) {
+ perror("File write error");
+ printf("Unable to write %u bytes of data to file \"%s\", returned %d !",
+ decoded_size, out_file_name, ret);
+ ret = -3;
+ break;
+ }
+ } else {
+ resend_request_for_block++;
+ if (trace_on) {
+ printf("Checksum error for block %u (received %u, computed %u) error number: %d.\n",
+ i, received_checksum, computed_checksum, resend_request_for_block);
+ }
+ if (resend_request_for_block > 3) {
+ printf("Block %d still wrong after 3 attempts, aborting.\n", i);
+ ret = -2;
+ break;
+ }
+ /* Back to previous block */
+ i--;
+ /* Ask for resend */
+ if (isp_serial_write(DATA_BLOCK_RESEND, strlen(DATA_BLOCK_RESEND)) != strlen(DATA_BLOCK_RESEND)) {
+ printf("Unable to send resend request.\n");
+ ret = -1;
+ break;
+ }
+ }
+ }
+ /* Close file */
+ if (out_fd != STDOUT_FILENO) {
+ close(out_fd);
+ }
+
+ return ret;
+}
+
/* FIXME : Temporary place-holder */
int isp_cmd_null(int arg_count, char** args)
static struct isp_command isp_cmds_list[] = {
{"unlock", 0, isp_cmd_unlock},
{"write-to-ram", 0, isp_cmd_null}, /* isp_cmd_write-to-ram} */
- {"read-memory", 0, isp_cmd_null}, /* isp_cmd_read-memory} */
+ {"read-memory", 3, isp_cmd_read_memory},
{"prepare-for-write", 0, isp_cmd_null}, /* isp_cmd_prepare-for-write} */
{"copy-ram-to-flash", 0, isp_cmd_null}, /* isp_cmd_copy-ram-to-flash} */
{"go", 0, isp_cmd_null}, /* isp_cmd_go} */
