1 files changed, 322 insertions, 0 deletions
diff --git a/example-fs-bb48/command.c b/example-fs-bb48/command.c
new file mode 100644
index 0000000..480cb2e
--- /dev/null
+++ b/example-fs-bb48/command.c
@@ -0,0 +1,322 @@
+#include <string.h>
+#include <stdint.h>
+#include <chopstx.h>
+#include "tty.h"
+#include "config.h"
+#ifdef TEMPERATURE_SUPPORT
+#include "adc.h"
+static int adc_initialized = 0;
+#endif
+
+struct command_table
+{
+  const char *name;
+  void (*handler) (struct tty *tty, const char *line);
+};
+
+/*
+ * Put a line (or lines) to TTY.
+ * LINE should be terminated with newline.
+ */
+static void
+put_line (struct tty *tty, const char *line)
+{
+  tty_send (tty, (uint8_t *)line, strlen (line));
+}
+
+static const char *help_string = 
+  "mdw ADDR [COUNT]\r\n"
+  "mww ADDR VALUE [COUNT]\r\n"
+#ifdef CRC32_SUPPORT
+  "crc32 string\r\n"
+#endif
+#ifdef TEMPERATURE_SUPPORT
+  "temp\r\n"
+#endif
+  "help\r\n";
+
+static char hexchar (uint8_t x)
+{
+  x &= 0x0f;
+  if (x <= 0x09)
+    return '0' + x;
+  else if (x <= 0x0f)
+    return 'a' + x - 10;
+  else
+    return '?';
+}
+
+static char *
+compose_decimal (char *s, int value)
+{
+  uint32_t v;
+  int col = 1000000000;
+  int d;
+  int digit_output = 0;
+
+  if (value < 0)
+    {
+      *s++ = '-';
+      v = 1 + ~((uint32_t)value);
+    }
+  else
+    v = (uint32_t)value;
+
+  while (col >= 10)
+    {
+      if (v >= (uint32_t)col)
+	{
+	  d = v / col;
+	  v = v - d * col;
+	  *s++ = d + '0';
+	  digit_output = 1;
+	}
+      else if (digit_output)
+	*s++ = '0';
+
+      col = col / 10;
+    }
+
+  *s++ = v + '0';
+
+  return s;
+}
+
+static char *
+compose_hex (char *s, uint32_t v)
+{
+  s[0] = hexchar (v >> 28);
+  s[1] = hexchar (v >> 24);
+  s[2] = hexchar (v >> 20);
+  s[3] = hexchar (v >> 16);
+  s[4] = hexchar (v >> 12);
+  s[5] = hexchar (v >> 8);
+  s[6] = hexchar (v >> 4);
+  s[7] = hexchar (v);
+  return s+8;
+}
+
+static void
+cmd_mdw (struct tty *tty, const char *line)
+{
+  int i;
+  uint32_t addr = 0;
+  int count = 0;
+  char c;
+
+  if (line[0] == '0' && line[1] == 'x')
+    line = line + 2;
+  while (1)
+    {
+      c = *line++;
+
+      if (c == 0)
+	{
+	  count = 1;
+	  break;
+	}
+
+      if (c == ' ')
+	break;
+
+      addr = (addr << 4);
+      if (c >= '0' && c <= '9')
+	addr += (c - '0');
+      else if (c >= 'a' && c <= 'f')
+	addr += (c - 'a') + 10;
+      else if (c >= 'A' && c <= 'F')
+	addr += (c - 'A') + 10;
+      else
+	{
+	  put_line (tty, "mdw error\r\n");
+	  return;
+	}
+    }
+
+  addr &= ~3;
+
+  if (count == 0)
+    {
+      while (1)
+	{
+	  c = *line++;
+
+	  if (c == 0 || c == ' ')
+	    break;
+
+	  count = count * 10;
+	  if (c >= '0' && c <= '9')
+	    count += c - '0';
+	  else
+	    {
+	      put_line (tty, "mdw error\r\n");
+	      return;
+	    }
+	}
+    }
+
+  i = 0;
+  while (i < count)
+    {
+      uint32_t v;
+      char output[48];
+      char *s;
+
+      s = compose_hex (output, addr);
+      *s++ = ':';
+      *s++ = ' ';
+
+      while (1)
+	{
+	  v = *(uint32_t *)addr;
+	  s = compose_hex (s, v);
+	  i++;
+	  addr += 4;
+	  if (i >= count || (i % 4) == 0)
+	    break;
+	  *s++ = ' ';
+	}
+
+      *s++ = '\r';
+      *s++ = '\n';
+      tty_send (tty, (uint8_t *)output, s - output);
+    }
+}
+
+static void
+cmd_mww (struct tty *tty, const char *line)
+{
+  (void)tty;
+  (void)line;
+  put_line (tty, "mww not yet supported\r\n");
+}
+
+
+#ifdef CRC32_SUPPORT
+#include "crc32.h"
+
+static void
+cmd_crc32  (struct tty *tty, const char *line)
+{
+  uint32_t v;
+  char string[10];
+  char *s;
+
+  crc32_init ();
+  while (*line)
+    crc32_u8 (*line++);
+  v = crc32_value () ^ 0xffffffff;
+
+  s = compose_hex (string, v);
+  *s++ = '\r';
+  *s++ = '\n';
+  tty_send (tty, (uint8_t *)string, sizeof (string));
+}
+#endif
+
+#ifdef TEMPERATURE_SUPPORT
+#define ADCV_TEMP25  14800 /* TYP: 716mV=14219 */
+#define ADCV_100M     3217
+
+/* m = 1.62 mV/C_degree */
+
+static void
+cmd_temperature  (struct tty *tty, const char *line)
+{
+  uint32_t v;
+  int t;
+  char string[13];
+  char *s;
+
+  (void)line;
+
+  if (!adc_initialized)
+    {
+      if (adc_init ())
+	{
+	  put_line (tty, "adc_init error\r\n");
+	  return;
+	}
+      else
+	{
+	  adc_start ();
+	  adc_initialized = 1;
+	}
+    }
+
+  adc_start_conversion (0, 1);
+  adc_wait_completion (NULL);
+  v = adc_buf[0];
+
+  t = 25 - (((int)v - ADCV_TEMP25) * 100 / ADCV_100M);
+
+  s = compose_hex (string, v);
+  *s++ = '\r';
+  *s++ = '\n';
+  tty_send (tty, (uint8_t *)string, s - string);
+
+  s = compose_decimal (string, t);
+  *s++ = '\r';
+  *s++ = '\n';
+  tty_send (tty, (uint8_t *)string, s - string);
+}
+#endif
+
+static void
+cmd_help (struct tty *tty, const char *line)
+{
+  (void)line;
+  put_line (tty, help_string);
+}
+
+
+struct command_table command_table[] = {
+  { "mdw", cmd_mdw },
+  { "mww", cmd_mww },
+#ifdef CRC32_SUPPORT
+  { "crc32", cmd_crc32 },
+#endif
+#ifdef TEMPERATURE_SUPPORT
+  { "temp", cmd_temperature },
+#endif
+  { "help", cmd_help },
+};
+
+#define N_CMDS (int)(sizeof (command_table) / sizeof (struct command_table))
+
+
+/*
+ * Dispatch a command parsing LINE.
+ * Line is NULL terminated with no newline.
+ */
+void
+cmd_dispatch (struct tty *tty, const char *line)
+{
+  int i;
+  const char *p;
+  unsigned int n = 0;
+
+  p = line;
+  while (*p)
+    {
+      if (*p++ == ' ')
+	break;
+      n++;
+    }
+
+  for (i = 0; i < N_CMDS; i++)
+    if (n == strlen (command_table[i].name)
+	&& strncmp ((const char *)line, command_table[i].name, n) == 0)
+      break;
+
+  if (i != N_CMDS)
+    (*command_table[i].handler) (tty, p);
+  else
+    {
+      uint8_t crlf[] = { '\r', '\n' };
+
+      put_line (tty, "No such command: ");
+      tty_send (tty, (const uint8_t *)line, n);
+      tty_send (tty, crlf, sizeof (crlf));
+    }
+}