altos: Rename 'core' to 'kernel'

[fw/altos] / src / kernel / ao_log_micro.c

diff --git a/src/kernel/ao_log_micro.c b/src/kernel/ao_log_micro.c
new file mode 100644 (file)
index 0000000..d665efb
--- /dev/null
+++ b/src/kernel/ao_log_micro.c
@@ -0,0 +1,121 @@
+/*
+ * Copyright © 2012 Keith Packard <keithp@keithp.com>
+ *
+ * This program 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; version 2 of the License.
+ *
+ * This program 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 should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <ao.h>
+#include <ao_micropeak.h>
+#include <ao_log_micro.h>
+#include <ao_async.h>
+
+static uint16_t ao_log_offset = STARTING_LOG_OFFSET;
+
+void
+ao_log_micro_save(void)
+{
+       uint16_t        n_samples = (ao_log_offset - STARTING_LOG_OFFSET) / sizeof (uint16_t);
+       ao_eeprom_write(PA_GROUND_OFFSET, &pa_ground, sizeof (pa_ground));
+       ao_eeprom_write(PA_MIN_OFFSET, &pa_min, sizeof (pa_min));
+       ao_eeprom_write(N_SAMPLES_OFFSET, &n_samples, sizeof (n_samples));
+}
+
+void
+ao_log_micro_restore(void)
+{
+       ao_eeprom_read(PA_GROUND_OFFSET, &pa_ground, sizeof (pa_ground));
+       ao_eeprom_read(PA_MIN_OFFSET, &pa_min, sizeof (pa_min));
+}
+
+void
+ao_log_micro_data(void)
+{
+       uint16_t        low_bits = pa;
+
+       if (ao_log_offset < MAX_LOG_OFFSET) {
+               ao_eeprom_write(ao_log_offset, &low_bits, sizeof (low_bits));
+               ao_log_offset += sizeof (low_bits);
+       }
+}
+
+#define POLY 0x8408
+
+static uint16_t
+ao_log_micro_crc(uint16_t crc, uint8_t byte)
+{
+       uint8_t i;
+
+       for (i = 0; i < 8; i++) {
+               if ((crc & 0x0001) ^ (byte & 0x0001))
+                       crc = (crc >> 1) ^ POLY;
+               else
+                       crc = crc >> 1;
+               byte >>= 1;
+       }
+       return crc;
+}
+
+static void
+ao_log_hex_nibble(uint8_t b)
+{
+       if (b < 10)
+               ao_async_byte('0' + b);
+       else
+               ao_async_byte('a' - 10 + b);
+}
+
+static void
+ao_log_hex(uint8_t b)
+{
+       ao_log_hex_nibble(b>>4);
+       ao_log_hex_nibble(b&0xf);
+}
+
+static void
+ao_log_newline(void)
+{
+       ao_async_byte('\r');
+       ao_async_byte('\n');
+}
+
+void
+ao_log_micro_dump(void)
+{
+       uint16_t        n_samples;
+       uint16_t        nbytes;
+       uint8_t         byte;
+       uint16_t        b;
+       uint16_t        crc = 0xffff;
+
+       ao_eeprom_read(N_SAMPLES_OFFSET, &n_samples, sizeof (n_samples));
+       if (n_samples == 0xffff)
+               n_samples = 0;
+       nbytes = STARTING_LOG_OFFSET + sizeof (uint16_t) * n_samples;
+       ao_async_start();
+       ao_async_byte('M');
+       ao_async_byte('P');
+       for (b = 0; b < nbytes; b++) {
+               if ((b & 0xf) == 0)
+                       ao_log_newline();
+               ao_eeprom_read(b, &byte, 1);
+               ao_log_hex(byte);
+               crc = ao_log_micro_crc(crc, byte);
+       }
+       ao_log_newline();
+       crc = ~crc;
+       ao_log_hex(crc >> 8);
+       ao_log_hex(crc);
+       ao_log_newline();
+       ao_async_stop();
+}