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MicroDexed
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Better EEPROM code:

Browse Source 
Cheksum calculation and auto initializing EEPROM when there is a checksum
mismatch.
pull/4/head
Holger Wirtz 6 years ago
parent 400eca2394
commit 3124205143
4 changed files with 100 additions and 34 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 113
      MicroDexed.ino
  2. 17
      config.h
  3. 1
      dexed.cpp
  4. 3
      dexed.h

113
MicroDexed.ino
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@ -68,11 +68,11 @@ uint32_t xrun = 0;
uint32_t overload = 0;
uint32_t peak = 0;
uint16_t render_time_max = 0;
uint8_t bank = EEPROM.read(EEPROM_OFFSET + EEPROM_BANK_ADDR);
uint8_t voice = EEPROM.read(EEPROM_OFFSET + EEPROM_VOICE_ADDR);
float vol = float(EEPROM.read(EEPROM_OFFSET + EEPROM_MASTER_VOLUME_ADDR)) / 256;
float vol_right = float(EEPROM.read(EEPROM_OFFSET + EEPROM_VOLUME_RIGHT_ADDR)) / 256;
float vol_left = float(EEPROM.read(EEPROM_OFFSET + EEPROM_VOLUME_LEFT_ADDR)) / 256;
uint8_t bank;
uint8_t voice;
float vol;
float vol_right;
float vol_left;
#ifdef MASTER_KEY_MIDI
bool master_key_enabled = false;
@ -100,20 +100,9 @@ void setup()
{
//while (!Serial) ; // wait for Arduino Serial Monitor
Serial.begin(SERIAL_SPEED);
delay(200);
delay(180);
#ifdef INITIALIZE_EEPROM
uint8_t bank = 0;
EEPROM.update(EEPROM_OFFSET + EEPROM_BANK_ADDR, bank);
uint8_t voice = 0;
EEPROM.update(EEPROM_OFFSET + EEPROM_VOICE_ADDR, voice);
float vol = VOLUME;
EEPROM.update(EEPROM_OFFSET + EEPROM_MASTER_VOLUME_ADDR, uint8_t(vol / 256));
float vol_right = 1.0;
EEPROM.update(EEPROM_OFFSET + EEPROM_VOLUME_RIGHT_ADDR, uint8_t(vol_right / 256));
float vol_left = 1.0;
EEPROM.update(EEPROM_OFFSET + EEPROM_VOLUME_LEFT_ADDR, uint8_t(vol_left / 256));
#endif
initial_values_from_eeprom();
#ifndef MASTER_KEY_MIDI
lcd.init();
@ -176,9 +165,9 @@ void setup()
load_sysex(bank, voice);
#ifdef DEBUG
Serial.print(F("Bank/Voice from EEPROM ["));
Serial.print(EEPROM.read(EEPROM_OFFSET + EEPROM_BANK_ADDR), DEC);
Serial.print(EEPROM.read(EEPROM_OFFSET + 4 + EEPROM_BANK_ADDR), DEC);
Serial.print(F("/"));
Serial.print(EEPROM.read(EEPROM_OFFSET + EEPROM_VOICE_ADDR), DEC);
Serial.print(EEPROM.read(EEPROM_OFFSET + 4 + EEPROM_VOICE_ADDR), DEC);
Serial.println(F("]"));
show_patch();
#endif
@ -496,30 +485,30 @@ int8_t num_key_base_c(uint8_t midi_note)
void set_volume(float master_volume, float volume_right, float volume_left)
{
EEPROM.update(EEPROM_OFFSET + EEPROM_MASTER_VOLUME_ADDR, uint8_t(master_volume * 256));
EEPROM.update(EEPROM_OFFSET + EEPROM_VOLUME_RIGHT_ADDR, uint8_t(volume_right * 256));
EEPROM.update(EEPROM_OFFSET + EEPROM_VOLUME_LEFT_ADDR, uint8_t(volume_left * 256));
EEPROM.update(EEPROM_OFFSET + 4 + EEPROM_MASTER_VOLUME_ADDR, uint8_t(master_volume * 256));
EEPROM.update(EEPROM_OFFSET + 4 + EEPROM_VOLUME_RIGHT_ADDR, uint8_t(volume_right * 256));
EEPROM.update(EEPROM_OFFSET + 4 + EEPROM_VOLUME_LEFT_ADDR, uint8_t(volume_left * 256));
#ifdef DEBUG
uint8_t tmp;
Serial.print(F("Setting volume: VOL="));
Serial.print(master_volume, DEC);
Serial.print(F("["));
tmp = EEPROM.read(EEPROM_OFFSET + EEPROM_MASTER_VOLUME_ADDR);
tmp = EEPROM.read(EEPROM_OFFSET + 4 + EEPROM_MASTER_VOLUME_ADDR);
Serial.print(tmp, DEC);
Serial.print(F("/"));
Serial.print(float(tmp) / 256, DEC);
Serial.print(F("] VOL_L="));
Serial.print(volume_left, DEC);
Serial.print(F("["));
tmp = EEPROM.read(EEPROM_OFFSET + EEPROM_VOLUME_LEFT_ADDR);
tmp = EEPROM.read(EEPROM_OFFSET + 4 + EEPROM_VOLUME_LEFT_ADDR);
Serial.print(tmp, DEC);
Serial.print(F("/"));
Serial.print(float(tmp) / 256, DEC);
Serial.print(F("] VOL_R="));
Serial.print(volume_right, DEC);
Serial.print(F("["));
tmp = EEPROM.read(EEPROM_OFFSET + EEPROM_VOLUME_RIGHT_ADDR);
tmp = EEPROM.read(EEPROM_OFFSET + 4 + EEPROM_VOLUME_RIGHT_ADDR);
Serial.print(tmp, DEC);
Serial.print(F("/"));
Serial.print(float(tmp) / 256, DEC);
@ -593,6 +582,78 @@ void handle_sysex_parameter(const uint8_t* sysex, uint8_t len)
#endif
}
void initial_values_from_eeprom(void)
{
uint32_t crc_eeprom=read_eeprom_checksum();
uint32_t crc = eeprom_crc32(EEPROM_OFFSET + 4, EEPROM_DATA_LENGTH);
if (crc_eeprom != crc)
{
#ifdef DEBUG
Serial.print(F("EEPROM checksum mismatch: 0x"));
Serial.print(crc_eeprom,HEX);
Serial.print(F("!= 0x"));
Serial.print(crc,HEX);
Serial.println(F(" - initializing EEPROM!"));
#endif
uint8_t bank = 0;
EEPROM.update(EEPROM_OFFSET + 4 + EEPROM_BANK_ADDR, bank);
uint8_t voice = 0;
EEPROM.update(EEPROM_OFFSET + 4 + EEPROM_VOICE_ADDR, voice);
float vol = VOLUME;
EEPROM.update(EEPROM_OFFSET + 4 + EEPROM_MASTER_VOLUME_ADDR, uint8_t(vol / 256));
float vol_right = 1.0;
EEPROM.update(EEPROM_OFFSET + 4 + EEPROM_VOLUME_RIGHT_ADDR, uint8_t(vol_right / 256));
float vol_left = 1.0;
EEPROM.update(EEPROM_OFFSET + 4 + EEPROM_VOLUME_LEFT_ADDR, uint8_t(vol_left / 256));
// write crc32
uint32_t crc = eeprom_crc32(EEPROM_OFFSET + 4, EEPROM_DATA_LENGTH); // recalculate
EEPROM.write(EEPROM_OFFSET + EEPROM_CRC32_ADDR, (crc & 0xff000000) >> 24);
EEPROM.write(EEPROM_OFFSET + EEPROM_CRC32_ADDR + 1, (crc & 0x00ff0000) >> 16);
EEPROM.write(EEPROM_OFFSET + EEPROM_CRC32_ADDR + 2, (crc & 0x0000ff00) >> 8);
EEPROM.write(EEPROM_OFFSET + EEPROM_CRC32_ADDR + 3, crc & 0x000000ff);
}
else
{
bank = EEPROM.read(EEPROM_OFFSET + 4 + EEPROM_BANK_ADDR);
voice = EEPROM.read(EEPROM_OFFSET + 4 + EEPROM_VOICE_ADDR);
vol = float(EEPROM.read(EEPROM_OFFSET + 4 + EEPROM_MASTER_VOLUME_ADDR)) / 256;
vol_right = float(EEPROM.read(EEPROM_OFFSET + 4 + EEPROM_VOLUME_RIGHT_ADDR)) / 256;
vol_left = float(EEPROM.read(EEPROM_OFFSET + 4 + EEPROM_VOLUME_LEFT_ADDR)) / 256;
}
}
uint32_t read_eeprom_checksum(void)
{
return (EEPROM[EEPROM_OFFSET + EEPROM_CRC32_ADDR] << 24 | EEPROM[EEPROM_OFFSET + EEPROM_CRC32_ADDR + 1] << 16 | EEPROM[EEPROM_OFFSET + EEPROM_CRC32_ADDR + 2] << 8 | EEPROM[EEPROM_OFFSET + EEPROM_CRC32_ADDR + 3]);
}
uint32_t eeprom_crc32(uint16_t calc_start, uint16_t calc_bytes) // base code from https://www.arduino.cc/en/Tutorial/EEPROMCrc
{
const uint32_t crc_table[16] =
{
0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac,
0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c,
0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c
};
uint32_t crc = ~0L;
if (calc_start + calc_bytes > EEPROM.length())
calc_bytes = EEPROM.length() - calc_start;
for (uint16_t index = calc_start ; index < calc_start + calc_bytes ; ++index)
{
crc = crc_table[(crc ^ EEPROM[index]) & 0x0f] ^ (crc >> 4);
crc = crc_table[(crc ^ (EEPROM[index] >> 4)) & 0x0f] ^ (crc >> 4);
crc = ~crc;
}
return (crc);
}
#if defined (DEBUG) && defined (SHOW_CPU_LOAD_MSEC)
void show_cpu_and_mem_usage(void)
{

17
config.h
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@ -59,7 +59,7 @@
// Some optimizations
#define USE_TEENSY_DSP 1
#define SUM_UP_AS_INT 1
#define REDUCE_LOUDNESS 1
#define REDUCE_LOUDNESS 0
// Enable TEST_NOTE for adding code to drop some midi notes for testing without keyboard
//#define TEST_NOTE MIDI_E2
@ -82,10 +82,13 @@
#define INITIAL_ENC1_VALUE 0
// EEPROM address
//#define INITIALIZE_EEPROM 1
#define EEPROM_OFFSET 0
#define EEPROM_BANK_ADDR 0
#define EEPROM_VOICE_ADDR 1
#define EEPROM_MASTER_VOLUME_ADDR 2
#define EEPROM_VOLUME_RIGHT_ADDR 3
#define EEPROM_VOLUME_LEFT_ADDR 4
#define EEPROM_DATA_LENGTH 5
#define EEPROM_CRC32_ADDR 0 // uint32_t (= 4bytes)
#define EEPROM_BANK_ADDR 4
#define EEPROM_VOICE_ADDR 5
#define EEPROM_MASTER_VOLUME_ADDR 6
#define EEPROM_VOLUME_RIGHT_ADDR 7
#define EEPROM_VOLUME_LEFT_ADDR 8

1
dexed.cpp
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@ -150,6 +150,7 @@ void Dexed::getSamples(uint16_t n_samples, int16_t* buffer)
int32_t clip_val = val < -(1 << 24) ? 0x8000 : val >= (1 << 24) ? 0x7fff : val >> 9;
#endif
#ifdef SUM_UP_AS_INT
//sum = buffer[i + j] + (clip_val >> REDUCE_LOUDNESS)*(float(data[DEXED_GLOBAL_PARAMETER_OFFSET+DEXED_VOICE_VOLUME])/256);
sum = buffer[i + j] + (clip_val >> REDUCE_LOUDNESS);
if (buffer[i + j] > 0 && clip_val > 0 && sum < 0)
{

3
dexed.h
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@ -127,7 +127,8 @@ enum DexedGlobalParameters {
DEXED_OP4_ENABLE, // 14
DEXED_OP5_ENABLE, // 15
DEXED_OP6_ENABLE, // 16
DEXED_MAX_NOTES // 17
DEXED_MAX_NOTES, // 17
DEXED_VOICE_VOLUME // 18
};
// GLOBALS

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