MIOS8 Change Log
Last Release: V1.9h @ 2014-12-19
- Improved acceleration handling of rotary encoders in FAST mode
- The encoder driver has been overworked based on proposals from Avogra.
Now it can even handle excotic encoder types without changes in MIOS code.
MIOS_ENC_MODE_DETENTED4 and MIOS_ENC_MODE_DETENTED5 have been added.
MIOS_ENC_MODE_DETENTED4 should be used for the so called "cheap Panasonic
encoders" which are available at www.pollin.de
The performance of the encoder driver has been improved as well.
The new method required a change of the MIOS_ENC_MODE_NON_DETENTED
and MIOS_ENC_MODE_DETENTED* definitions, which unfortunately makes all
previously released applications incompatible.
Accordingly, all applications have been re-released. The new
binaries can be downloaded from the MIOS download page.
- in order to update MIOS, please download the <derivative>/midi/mios_v1_9g_<derivative>.hex
file first, thereafter the .hex file of the application.
- Timer0 now free as resource if the AIN driver is not enabled.
A special interrupt hook is not provided, but this timer can be used for 16bit time measurements
- AIN driver now working correctly on PIC18F4620/PIC18F4685
- backup function now properly working for >32k flash devices like PIC18F4620 and PIC18F4685 (see also doc/mios_backup.txt)<(LI>
- a new rotary encoder mode "MIOS_ENC_MODE_DETENTED3" is available, which works similar to MIOS_ENC_MODE_DETENTED2, but increments the value "during the click", and not "after the click"
- priority of MIDI Rx Handler changed (now it has the highest priority)
- MIOS_HLP_GetIndex_2bytes now takes the 64k boundary into account
(only relevant for PIC18F4685 and PIC18F4682)
- debouncing was skipped (or DIN toggles were ignored) if BSR was
modified within the USER_SR_Service_Finish hook
- download request for 64k BankSticks (24LC512) working now
- support for PIC18F4685 and PIC18F4682
- initialisation of 4bit CLCD overworked
- 4bit CLCD selected by default for PIC18F4685 and PIC18F4682
to free the ECAN pins at RB2 and RB3
Note that the D0-D3 pins of the CLCD should not be connected
to the PIC in this case, but clamped to ground instead!
- new Bootloader version V1.2b: support for the new PICs
Output drivers of Port B are not enabled during the startup
- Changed the way how MIOS debounces buttons. Before this change,
the whole SRIO scan was skipped, with the result, that DOUT
registers were not serviced as well. This led to the unwanted
side effect, that LED matrices were flickering and rotary encoders
with high resolutions were jumping.
With this release, only DINs which are not assigned to encoders
are debounced, and the SRIO scan is continued so that the DOUT
registers are always updated
- MIOS_MIDI_InterfaceSet/MIOS_MIDI: (E)USART baudrate only updated
when value has changed to ensure, that the baudrate generator
won't be reset - this was leading to invalid MIDI bytes on quick
changes between an external MBHP_IIC and the internal MIDI port
Changes are only relevant for PIC18F4620!
- undone modification of MIOS_EEPROM_* due to compatibility issues
with PIC18F452 based MIOS applications (they don't initialize EEADRH)
EEADRH must now be incremented/set from the application if required.
- the bootloader location has been moved from 0x7c00-0x7fff
to 0x0000-0x0400. This frees the upper 1k block for
applications, and equates the memory allocation between
PIC18F452, PIC18F4620 and future PIC devices.
- the default font for graphical displays has been moved
from 0x28fc to 0x7cfc
- both changes ensure compatibility with all existing applications.
Newer versions of applications like MIDIbox SID, MIDIbox SEQ,
MIDIbox FM, MIDIbox64 and MIDIbox64E will allocate the
upper 1k block very soon, they won't be compatible to
MIOS V1.8 and lower anymore. Therefore an update to MIOS V1.9
is strongly recommended!
- a new Bootloader has been released (V1.2)
- an update package for MIOS V1.9 and Bootloader V1.2 is
available under http://www.ucapps.de/mios/mios_update_v1_9.zip.
It makes the update so comfortable and secure as possible
- MIOS and Bootloader now support the MBHP_IIC_MIDI module
as alternative MIDI Out port. The address of the module
has to be specified in the ID header, byte 5
Example: 0000000000100000 redirects all MIDI Out messages
to the first MBHP_IIC_MIDI module.
This is intended as workaround for the silicon bug of
PIC devices like PIC18F4620 with chip revision A3 and A4
see also this article
Note that the ID header can be changed with the change_id
application without using a PIC programmer.
- the MIOS_MIDI_InterfaceSet function now allows to change the
target interface of MIOS_MIDI_TxBufferPut on-the-fly
- the MIOS_IIC_ByteSend function now returns the inverted
ACK flag for easier usage under C
- the MIOS function description has been enhanced by C
declarations and examples -> cmios_fun.html
- MIOS is not licensed under GPL anymore. It's still open
source, but commercial use is not allowed without my
- the interrupt handler now also saves FSR0L and FSR0H.
This allows the use of C programs compiled with sdcc
- a wrapper for the SDCC compiler is now available in a
separate package. More informations can be found under
- the motorfader driver has been overworked. The new concept
works with a "dynamic deadband" and a definable PWM which will
be used once the fader reaches the target position.
The details are described at http://www.ucapps.de/mbhp_mf.html
- on a MIOS up- or download, the BankStick number is now
selected with an address extension, which is part of the
- the "Brown Out Reset" (BOR) settings in the configuration
sector are changed automatically when MIOS detects unproper
settings - the appr. cell in this sector will be overwritten
and the device will be reset.
New Setting: Brown Out Reset at 4.5V
This ensures that the PIC won't access devices during
power-off which cannot operate at voltages < 4.5V
(e.g. the BankStick, which could get an unintended write command)
- support for PIC18F4620 (64k flash device)
Unfortunately this derivative is currently not qualified for
MIOS due to a silicon bug in the EUSART peripheral (rev3)
this version requires slight changes on the core module
wiring to improve the performance of MIOS. See also this infopage.
- DOUT signals are stable over the whole update cycle
- BankStick (IIC) accesses don't block the interrupts anymore
- the CPU load caused by the rotary encoder handler has
been reduced to improve the realtime behaviour of MIOS
- MIOS_MIDI_TxBufferPut is an atomic operation now to prevent
a malfunction which can happen when this function is executed
at the same time where the Tx handler fetches new data from
- MIOS_Timer_ReInit can be used to re-initialize the timer w/o
a reset for smooth timer period changes
- MIOS_BANKSTICK_ReadPage, MIOS_EEPROM_WritePage and MIOS_EEPROM_ReadPage
are new functions for faster data transfers
- new functions USER_LCD_Data, USER_LCD_Cmd, USER_LCD_SpecialCharInit
for custom display drivers
- Bugfix: due to an unprotected register the MIDI receiver
forwarded the wrong byte to the MIDI Rx Buffer. This happened
when a MIDI event had been received in Running Status mode
and the application had overwritten IRQ_TMP1 within the
USER_MIDI_NotifyRx hook. The MIDI receiver now uses an
- support for CLCDs with 4bit interface, see the functional
description of MIOS_LCD_TypeSet
- V1.5 - the first open source release
- if MIOS_SRIO_TS_SensitivitySet is called with WREG == 0x00, the
touch sensor Pin RD.4 (J14 of the core module) won't be driven
by MIOS anymore and therefore is free for other purposes
- the AIN handler has been optimized to a two-step state machine
with a sample frequency of 200 uS
- USER_MPROC_NotifyTimeout hang-up has been fixed
- the internal registers have been rearranged for a better overview.
Applications shouldn't be affected from these changes
- LCD cursor mapping (MIOS_LCD_YAddressSet in conjunction with
MIOS_LCD_CursorSet) didn't work correctly with 4-line displays
(cursor pos >= 0x80 was forwarded to second display, although
third and fourth lines was mapped to a position < 0x80)
- USER_MPROC_NotifyReceivedEvent and USER_MPROC_NotifyFoundEvent:
On 2-byte MIDI events (program change and channel pressure),
the 2nd byte, stored in MIOS_PARAMETER2, is now also copied
to the 3rd byte (MIOS_PARAMETER3) for an easier handling
in some MIDIbox applications
- new function MIOS_MF_TouchDetectionReset: it resets the
software implemented touch detection so that the fader is
repositioned regardless if it is currently manually moved or not
- interrupts are not blocked during a BankStick write anymore
to improve the realtime capability of MIOS and especially to
avoid MIDI data loss during the write cycle
- the IIC functions are now open for public, they can be used
to access any IIC compatible device via port J4 in parallel
to the BankSticks. Example: see the lcd7_iic driver
- there are two new hooks available which allow to monitor the
incoming and outgoing MIDI traffic with zero latency:
USER_MIDI_NotifyRx and USER_MIDI_NotifyTx.
- The motorfader driver now works much better with panasonic
faders. New recommended calibration values: Alps: 0x0e@8V,
- automatic debouncing has been added to the SRIO driver which
compensates temporal spikes caused by low-cost buttons. See
also the detailed description of the MIOS_SRIO_DebounceSet
function. Just add this function at the beginning of your
application (below USER_Init) if required.
- a new display type #6 has been added which redirects single
characters and strings to the MIDI interface. The used protocol
is documented in the http://www.ucapps.de/mios/mios_sysex_implementation.txt
- a LCD message receiver has been added to the MIDI processor.
Incoming characters will be print for 2 seconds on screen.
Btw.: the same protocol will be supported by MBHP_TV in the next
- it's now possible to write directly into a BankStick via MIDI.
This opens the possibility to embed the BankStick content into
the application by locating the data to address range
0x400000-0x407fff (24LC256; 32k) resp. 0x400000-0x40ffff (24LC512; 64k).
Also the upload to multiple BankSticks is supported with the
BankStick select function
- it's now possible to read directly from internal Flash/EEPROM and
external BankStick via MIDI. This is a nice debugging help, but
opens also the possibility to create backups and to copy (clone)
the content of a BankStick
- it's now possible to integrate an own LCD driver which is not
natively supported by MIOS. See also the docs under MBHP->LCD
- up to 8 BankSticks can now be addressed over the same IIC bus
by using the MIOS_BANKSTICK_CtrlSet function. Note that this
feature doesn't work with the EEPROM M24256 from ST, but only
with Microchip EEPROM 24LC256. See also the docs under
- the MIOS_HLP_Dec2BCD function can be used to convert a 16 bit
decimal value to BCD (for example to send the digits of a
decimal number over the MIDI interface or to display the numbers
on a LED digit display)
- MIOS_LCD_PrintBCD4 and MIOS_LCD_PrintBCD5 can be used to print
16 bit values in decimal form
- the MIOS_MF_StartupSpeedSet allows to give the motorfaders a
"kick" when they are starting to move (can be tried with the
mf_calibration application. The MIDIbox LC application now
includes a calibration menu)
- the speed modes of the encoder driver have been rewritten,
see the MIOS_ENC_SpeedSet description for further details.
The "enc_speed_v1_3" application allows to test the various
- MIOS_LCD_TypeSet offers additional parameters
- the chip select lines of KS0108 or HD61202 based displays can
now be inverted
- additional GLCD driver for T6963c based displays. The performance
of this display is very poor, it is not recommended for
applications which have to react in realtime like the MIDIbox LC
or any other "MIDI receiver"
- the enable pins of character LCDs can now be changed during
runtime. In this way it is possible to connect multiple LCDs to
one core module, the maximum number of LCDs which can be handled
by a application is now only limited by the number of free pins
- fast write to BankStick and EEPROM w/o verify
- page write to BankStick (64 bytes at once)
- dynamic priority sampling for muxed pots (improved latency, known
from MIDIbox Plus and MIDIbox64)
- some imperfections in the SRIO and MF handler have been fixed in
- MIOS_HLP_16bitAddSaturate: 16 bit addition with saturation.
Usefull in conjunction with rotary encoders.
Will be used by upcoming applications (MIDIbox HN already uses
this function in hn_enc.inc)
- support for detented encoders (see mios_tables.inc)
- MIOS_DIN_PinAutoRepeatEnable, MIOS_DIN_PinAutoRepeatDisable,
MIOS_DIN_PinAutoRepeatGet: an assignable autorepeat function
for every button. Excellent for data entry.
- MIOS_CLCD_SpecialCharInit, MIOS_CLCD_SpecialCharsInit:
allows to initialize the 8 special characters of a LCD.
- MIOS_LCD_YAddressSet: allows to enable a second character LCD
Last update: 2023-04-23
Copyright © 1998-2023, Thorsten Klose. All rights reserved.