+/* Modify memory.
+ *
+ * Syntax:
+ * !mm {addr}
+ * !nm {addr}
+ */
+
+ static uint8_t *mm_last_addr;
+
+static command_ret_t
+mod_mem_avr(cmd_tbl_t *cmdtp, int incrflag, uint_fast8_t flag, int argc, char * const argv[])
+{
+ uint8_t *addr;
+ int nbytes;
+
+ (void) cmdtp;
+
+ if (argc != 2)
+ return CMD_RET_USAGE;
+
+ /* We use the last specified parameters, unless new ones are
+ * entered.
+ */
+ addr = mm_last_addr;
+
+ if ((flag & CMD_FLAG_REPEAT) == 0) {
+ /* New command specified.
+ */
+
+ /* Address is specified since argc > 1
+ */
+ addr = (uint8_t *) (size_t) eval_arg(argv[1], NULL);
+ }
+
+ /* Print the address, followed by value. Then accept input for
+ * the next value. A non-converted value exits.
+ */
+ do {
+ uint8_t data = *addr;
+ printf_P(PSTR("%04x: %02x"), addr, data);
+
+ nbytes = cli_readline(PSTR(" ? "), 0);
+ if (nbytes == 0 || (nbytes == 1 && console_buffer[0] == '-')) {
+ /* <CR> pressed as only input, don't modify current
+ * location and move to next. "-" pressed will go back.
+ */
+ if (incrflag)
+ addr += nbytes ? -1 : 1;
+ nbytes = 1;
+
+ } else {
+ char *endp;
+ data = eval_arg(console_buffer, &endp);
+ nbytes = endp - console_buffer;
+ if (nbytes) {
+ *addr = data;
+ if (incrflag)
+ addr++;
+ }
+ }
+ } while (nbytes > 0);
+
+ mm_last_addr = addr;
+ return CMD_RET_SUCCESS;
+}