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[quote:96ecddc26e="atmega64"]would be perfect ... how can I do?[/quote:96ecddc26e] As I wrote: slow down the main clock and use a prescaler of 1. [quote:96ecddc26e][b:96ecddc26e]Clockdivision = 2[/b:96ecddc26e] should do the trick with this controller, however [u:96ecddc26e]everything runs slower then.[/u:96ecddc26e][/quote:96ecddc26e]
Hello to all, since i read in the Datasheet that Attiny 2313A Timer0 has PWM functionality, i'm wondering, why i get error message, using the PWM-statement in Bascom?
[code:1:5862fb842c] config TIMER0 = Pwm, Prescale = 1, Pwm = 8, Compare A Pwm = Clear Down, Compare B Pwm = Clear Down
[/code:1:5862fb842c]
Kind regards Norbert
[b:5862fb842c][color=red:5862fb842c](BASCOM-AVR version : 2.0.8.1 )[/b:5862fb842c][/color:5862fb842c]
[quote:e8915c38b3] For example, if main clock would be 8MHz, a prescaler of 1 and OCR2A of 199 would result in 40kHz with a 200 step range of duty cycle. [/quote:e8915c38b3]
[quote:367a718250="atmega64"]to have minor increases in duty cycle values? The code I'm using is as follows: [/quote:367a718250]Your code is nonsense.
[quote:367a718250="atmega64"][code:1:367a718250]Pwm2b = 40 '40KHZ[/code:1:367a718250][/quote:367a718250]Surely not 40kHz.
While I had no fun to disassemble your binary bit-muddle timer2 configuration, I actually had to for finding out that you use mode 7 of timer2, fast pwm with OCR2A as top. Using Dutycycle_tmp to control OCR2A alters thus the frequency, and not duty-cycle at constant frequency.
If your code would be nothing else than what you show, then Dutycycle_tmp and OCR2A would be zero. OCR2B has no effect at all, as the timer would always count from 0 to reset at 1, a value of 40 would be never reached. The formula for this timer mode is: f_OCnx = f_clk_I/O / (prescaler * (1 + OCRnx)) ---> f_OC2B = 16MHz / (8 * (1 + 0)) which calculates to 2MHz.
If for example OCR2A would be set to the value of 40, the resulting frequency would be 48780Hz, and the duty-cycle could be adjusted with OCR2B within the range of 0 to 40. In case this is to coarse, use a 16bit timer or slow down the main clock, as then a prescaler of 1 would be possible while staying in an 8bit value range.
For example, if main clock would be 8MHz, a prescaler of 1 and OCR2A of 199 would result in 40kHz with a 200 step range of duty cycle. Clockdivision = 2 should do the trick with this controller, however everything runs slower then.
If such is not desirable, use a prescaler of 8 and OCR2A of 49, you have a 50 step range of duty cycle then. And that's the best you can get then.
Hi, I use last code and library from this post: https://www.mcselec.com/index2.php?option=com_forum&Itemid=59&page=viewtopic&p=64606#64606 This is "Fast library for SSD1963 LCD" by Mrshilov.
This code "Landscape Test SSD1963.bas" dont work propertly witch my LCD: https://www.aliexpress.com/item/7-0-7-inch-800-480-TFT-Touch-LCD-Module-Display-Screen-Panel-with-PCB-Adapter/32916913295.html?spm=a2g0s.9042311.0.0.298e4c4dnceTBr
Black screen.
But when I program it from this code : https://www.mcselec.com/index2.php?option=com_forum&Itemid=59&page=viewtopic&t=11500&highlight=ssd1963
or i Landscape Test SSD1963.bas change initialisation for this: [code:1:61d21f2f5a]Sub Ssd1963_init
Call Ssd1963_select_reg(&Hba) Call Ssd1963_write_data(&H000f) 'GPIO[3:0] out 1
Call Ssd1963_select_reg(&Hb8) Call Ssd1963_write_data(&H0007) 'GPIO3=input, GPIO[2:0]=output Call Ssd1963_write_data(&H0001) 'GPIO0 normal
Call Ssd1963_select_reg(&H08) 'rotation - Set the read order from frame buffer to the display panel
'writing from bottom to top 'Call Ssd1963_write_data(&H0000) 'writing from top to bottom Call Ssd1963_write_data(&H0001) 'writing from right to left 'Call Ssd1963_write_data(&H0077) 'Call Ssd1963_write_data(&H0006)
Call Ssd1963_select_reg(&Hf0) 'pixel data interface Call Ssd1963_write_data(&H0003) '16-bit (565 format)
Waitms 5
Call Ssd1963_select_reg(&H29) 'display on
Call Ssd1963_select_reg(&Hd0) Call Ssd1963_write_data(&H000d) End Sub [/code:1:61d21f2f5a]
...LCD display correctly direction and orientation (i test onlu portrait mode), but colors are different.
I trying to change bit 3 from register 36 of displays (RGB to BGR) but colors still has wrong, and colors are differend. For example text witch schould be Red is Black
What can I do more, to LCD colors properly?
[b:61d21f2f5a][color=red:61d21f2f5a](BASCOM-AVR version : 2.0.8.1 )[/b:61d21f2f5a][/color:61d21f2f5a]
Thank you Albert for advice. I replace crystal from 16mhz to 4 mhz and seems ok so far, will test more. I configure fuse to have 14ck startup time without aditional delay but when I measure time from apply vcc and first instruction(set ouput for can transceiver) I have around 4.2 ms. I use Cksel(3-0) 1101 and sut1=0, sut0=1 and 4mhz crystal. Thank you.
Last code "Landscape Test SSD1963.bas" dont work propertly witch my LCD: https://www.aliexpress.com/item/7-0-7-inch-800-480-TFT-Touch-LCD-Module-Display-Screen-Panel-with-PCB-Adapter/32916913295.html?spm=a2g0s.9042311.0.0.298e4c4dnceTBr
Black screen.
But when I program it from this code : https://www.mcselec.com/index2.php?option=com_forum&Itemid=59&page=viewtopic&t=11500&highlight=ssd1963
LCD display text, but inverted and mirrored...see picture [img:4ceaa72b01]https://www.mcselec.com/userpix/16555_ss_1.jpg[/img:4ceaa72b01]
Now when I change initialisation for this: [code:1:4ceaa72b01]Sub Ssd1963_init
Call Ssd1963_select_reg(&Hba) Call Ssd1963_write_data(&H000f) 'GPIO[3:0] out 1
Call Ssd1963_select_reg(&Hb8) Call Ssd1963_write_data(&H0007) 'GPIO3=input, GPIO[2:0]=output Call Ssd1963_write_data(&H0001) 'GPIO0 normal
Call Ssd1963_select_reg(&H08) 'rotation - Set the read order from frame buffer to the display panel
'writing from bottom to top 'Call Ssd1963_write_data(&H0000) 'writing from top to bottom Call Ssd1963_write_data(&H0001) 'writing from right to left 'Call Ssd1963_write_data(&H0077) 'Call Ssd1963_write_data(&H0006)
Call Ssd1963_select_reg(&Hf0) 'pixel data interface Call Ssd1963_write_data(&H0003) '16-bit (565 format)
Change only this one line (&H36 to &H08): [code:1:4ceaa72b01]Call Ssd1963_select_reg([b]&H08[/b]) 'rotation - Set the read order from frame buffer to the display panel [/code:1:4ceaa72b01]
...LCD display correctly.
Next when I copy this initialisation to last code from this subject, LCD start display data, but data is like on this video... https://youtu.be/vz5D1PGGQsA (screen is mirrored) LCD display data only when this part of initialization is like on oryginal code: [code:1:4ceaa72b01]Call Ssd1963_select_reg([b]&H36[/b]) 'rotation - Set the read order from frame buffer to the display panel [/code:1:4ceaa72b01]
xmega has variable uart channels. but there are PB versions like 328PB that have 2 uarts. you might check out $serialout and $serialin . you could write some custom code that either handle the HW uart or the SW uart.
BASCOM-AVR : SSD1963 bad colors : NEWTOPIC
Hi, I use last code and library from this post:
https://www.mcselec.com/index2.php?option=com_forum&Itemid=59&page=viewtopic&p=6...
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