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Hello.
Try to download
https://creasol.it/holtek/ht1621.c
https://creasol.it/holtek/ht1621.h
and work on those files to display something on the LCD.
Best regards. Paolo
--
Creative Solutions Engineering
https://www.creasol.it
**broken link removed**
8051 8-bit random generator
I cannot try this routine due to MCU limitation (8bit holtek MCU), but I wonder if the same function should be applied to an 8 bit random number.
So, splitting the random byte into 2 nibbles which should be multiplied by little numbers, then shifted and ORed forming...
8 bit pseudorandom c
Could anybody send me any idea to have a sequence of 8bit random numbers?
My idea was to start from a SEED and every fix period (timer interrupt routine) update this number obtaing a pseudo random sequence.
I found some example about "how to generate a stream of bits" or...
Re: eZ80190 dev' bord
Ok, from your last post I've understood that you are interested about another MCU than eZ8 Encore, so I don't know anything about it.
Bye. Paolo
microcontroller prices
Oh, is not easy to find low cost MCU with all these requirements, expecially for 2kbyte eeprom and 2 UART.
Holtek 48R50 (3x33 or 4x32 LCD segments) +external 24C16 can be used, but only with up to 9600bps UARTs (they should be implemented in software: it has not UART...
microcontroller comparison
If you specify here which are your requests in terms of speed, peripherals, memory, ...., somebody might help you find less expensive products.
Bye. Paolo
Re: eZ80190 dev' bord
I don't know which is you r evaluation board, exactly.
I've just used the evaluation boards for eZ8F04022 (encore) and eZ8F04022A (encore XP) with worst results... pins pullups don't works well, several pins are unuseful due to connection to leds, oscillator often does...
Re: I need help using TLC548 or TLC549 serial ADC from Texas
I can confirm that TCL1549 and TLC1543 works very very well, for me.
The procedure You uses is ok.... first you must sample and convert data, then you can read it.
I've only ASM routines suitable for 8051 core... if you need, I can...
Re: SmartCard Programming_Pic Baisc Pro_TCL_Schamatic
Here is a piece of TCL code to use COM port in both Linux and Windows (I've not tried other platforms).
set DOS_COMPORT COM1
set UNIX_DEVICE /dev/ttyS0
if [string equal -nocase $tcl_platform(platform) {windows}] {
set comport...
You have not specified how is LCD built.
Calculator LCD are often custom LCD with or without build-in controller.
Often, the controller is HT1621, which is a chip similar to RAM accessable though a serial interface which permit to enable/disable each LCD segment (1 bit for each segment).
If you...
Z80, why change? You know microchip very well, so you have a good point to start from. Microchip is good expecially for non-complex applications.
BTW, I prefer holtek mcu, which are less expensive than microchip,and more and more companies in Italy ask for holtek MCU for this reason. Also, IDE...
Yes, but not only this. Often, compilers add instructions such as _nop(), _halt(), _clrwdt(), and other simple functions to set/clr port bits.
In MCU programming, very often you can declare the address of a variable using the syntax
type variable @ address; for example unsigned char...
_nop microcontroller
Using plain ANSI-C compiler is a limitative solution for MCU programming.
Consider that with MCU you often need bit manipulation and bit variables, not well defined in ANSI-C (bitfields?? not very comfortable), and special instructions (nop, watchdog reset, ...) which...
If you need a very simple RTC, without internal RAM or EEPROM or other collateral features, you can use HT1381 (look at https://www.holtek.com for the datasheet) which has a very low price. It has a 3 wire interface with the MCU and should be connected to a 32.768KHz crystal and power supply...
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