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Forum Index : Microcontroller and PC projects : OPTION settings for Waveshare Pico displays sans MISO pins ?

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hitsware2

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Posted: 11:53pm 26 May 2022
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I.E. ST7789 or ST7735 controllers
my site
 
Rickard5

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Posted: 03:00am 27 May 2022
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are you talking about this one with the Pico socket on the back?

OPTION SYSTEM SPI GP10,GP11,GP12
OPTION LCDPANEL ILI9488W, LANDSCAPE,GP8,GP15,GP9,GP13
OPTION TOUCH GP16,GP17
GUI CALIBRATE 0, 3946, 211, -1287, 853
OPTION SDCARD GP221
I may be Vulgar, but , while I'm poor, I'm Industrious, Honest,  and trustworthy! I Know my Place
 
Mixtel90

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Posted: 06:52am 27 May 2022
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AFAIK you'll have to specify a MISO pin as the system expects it. You won't be able to connect it to anything, of course.
Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs
 
hitsware2

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Posted: 01:42pm 27 May 2022
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> are you talking about this one with the Pico socket on the back?

This One .....
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hitsware2

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Posted: 01:45pm 27 May 2022
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  Mixtel90 said  AFAIK you'll have to specify a MISO pin as the system expects it. You won't be able to connect it to anything, of course.


Get errors .... MMBasic expects it , but not the board ...
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Mixtel90

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Posted: 03:17pm 27 May 2022
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The MISO signal is from the display to MMBasic. It is only used when MMBasic is trying to read from the display memory. That depends on which commands are being used. Without it you can't use BLIT, BLIT READ or transparent text. I'm not certain if the Touch commands work either. You may have to tie the MISO input to ground so that it doesn't get spurious information. if that worries you, do it via a resistor to protect the pin if it becomes an output.
Mick

Zilog Inside! nascom.info for Nascom & Gemini
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hitsware2

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Posted: 05:30pm 27 May 2022
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The MISO pin with this (these) controllers is " hidden "
If the MISO parameter is omitted from the OPTION SYSTEM SPI
statement , I get an error . Likewise guessing at pin numbers .
Perhaps there should be no MISO parameter called for ?
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matherp
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Posted: 05:55pm 27 May 2022
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Which display? All the waveshare ones are tested and working fine
 
hitsware2

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Posted: 06:04pm 27 May 2022
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https://www.waveshare.com/wiki/Pico-LCD-1.3

  Quote  
Note: Different from the traditional SPI protocol,
the data line from the slave to the master is hidden
since the device only has a display requirement.

Edited 2022-05-28 04:07 by hitsware2
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matherp
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Posted: 08:16am 28 May 2022
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OPTION SYSTEM SPI GP10,GP11,GP28
OPTION LCDPANEL ST7789,L,GP8,GP12,GP9,GP13

Then set BACKLIGHT 50 and adjust to see if 100 is full bright or 0 is full bright (depends on how the display is wired)
Edited 2022-05-28 18:16 by matherp
 
goc30

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Posted: 05:25pm 28 May 2022
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  matherp said  Which display? All the waveshare ones are tested and working fine


with WaveShare Pico-Eval , I have 2 problems

1 SdCard is on second SPI and LCD on first SPI. For that "option sdcard" don't work because it use "Option system SPI" with MOSI, and CLK of LCD lines

2 Buzzer use only 1 line, but "option audio" need 2 lines (left and right). It is not possible to declare only 1 line

nota: I don't speak about I2S
 
Mixtel90

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Posted: 05:46pm 28 May 2022
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SD cards are handled by MMBasic as bitbang devices. They don't use the on-chip SPI hardware even if they are connected to it. In fact, you can use any pins for a SD card. See the manual - there are two ways to use OPTION SDCARD, one working with OPTION SYSTEM SPI and one without using it.

OPTION AUDIO is designed for stereo audio, it isn't intended for a buzzer.

See my recent post "Picomite buzzer / beeper" to get some idea of how to handle one in MMBasic.
Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs
 
hitsware2

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Posted: 06:37pm 28 May 2022
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  matherp said  OPTION SYSTEM SPI GP10,GP11,GP28
OPTION LCDPANEL ST7789,L,GP8,GP12,GP9,GP13

Then set BACKLIGHT 50 and adjust to see if 100 is full bright or 0 is full bright (depends on how the display is wired)

Thank You (Again(Again(The "GP28" is familiar)))
Errors gone, but GUI TEST shows horizontal hash rather
than balls ... Switched Picos same result ....
Another display on the way ....
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goc30

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Posted: 12:36am 29 May 2022
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  Mixtel90 said  SD cards are handled by MMBasic as bitbang devices. They don't use the on-chip SPI hardware even if they are connected to it. In fact, you can use any pins for a SD card. See the manual - there are two ways to use OPTION SDCARD, one working with OPTION SYSTEM SPI and one without using it.

in doc it said
OPTION SDCARD CSpin[,CLKpin, MOSIpin, MISOpin]

I have this

> option list
OPTION SYSTEM SPI GP10,GP11,GP12
OPTION SYSTEM I2C GP6,GP7
OPTION LCDPANEL ILI9488W, LANDSCAPE,GP8,GP15,GP9,GP13
OPTION TOUCH GP16,GP17
GUI CALIBRATE 0, 3970, 219, -1285, 880
> option sdcard gp22,gp5,gp19,gp20
> files
Error : SD Card not found
>

my SDCARd work with cmm2.
And where Picomite use CMD line ??
In schematic, it seem that GP21 and GP22 are not use

  Mixtel90 said  OPTION AUDIO is designed for stereo audio, it isn't intended for a buzzer.

See my recent post "Picomite buzzer / beeper" to get some idea of how to handle one in MMBasic.

first, in schematic, it seem that the "buzzer is just a smal speaker. they give no more info
second: if using pwm to make sound is like using "play tone", why I can't use option audio??
And if I want to use only one real audio output in monophonic mode (because  I need more pins) How I do???

for info pinout Pico with some cards
pin_out.zip
Edited 2022-05-29 10:39 by goc30
 
Mixtel90

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Posted: 07:03am 29 May 2022
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SD cards are a pain. :) They can have 2 interfaces, SDIO and SPI. MMBasic doesn't support SDIO.

micro Card pinouts

Pin   SDIO       SPI

1     DAT2       X
2     CD/DAT3    CS
3     CMD        DI (MOSI)
4     VDD        VDD
5     CLK        SCLK
6     VSS        VSS
7     DAT0       DO (MOSI)
8     DAT1       X


So you want
OPTION SDCARD GP21, GP5, GP18, GP19
...if I've figured it out right. :)

The audio output from the PicoMite is PWM stereo. It has a fixed frequency and the mark-space ratio carries the audio data. This may not work well with a passive buzzer, it depends if the mechanical inertia will act as a mechanical filter to remove the carrier frequency. You can try it, but I doubt if you'll have much success. You have to define both A and B channels of a PWM port though, even if you only use one.

The best way is to give it a simple square wave, but the frequency range it can manage is very narrow and is usually around 2400Hz. It's not suitable for playing "normal" music if that's what you had in mind.
Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs
 
goc30

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Posted: 08:35am 29 May 2022
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  Mixtel90 said  SD cards are a pain. :) They can have 2 interfaces, SDIO and SPI. MMBasic doesn't support SDIO.


So you want
OPTION SDCARD GP21, GP5, GP18, GP19
...if I've figured it out right. :)


Iy don't work


option list
OPTION SYSTEM SPI GP10,GP11,GP12
OPTION SYSTEM I2C GP6,GP7
OPTION LCDPANEL ILI9488W, LANDSCAPE,GP8,GP15,GP9,GP13
OPTION TOUCH GP16,GP17
GUI CALIBRATE 0, 3970, 219, -1285, 880
OPTION SDCARD GP22, GP5, GP19, GP20
> option sdcard disable
> option sdcard gp21, gp5, gp18, gp19
> files
Error : SD Card not found
> option sdcard disable
> option sdcard gp21,gp5,gp19,gp20
> files
Error : SD Card not found
>
 
matherp
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Posted: 09:10am 29 May 2022
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22,5,18,19
 
goc30

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Posted: 10:23am 29 May 2022
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  matherp said  22,5,18,19
 
Mixtel90

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Posted: 11:16am 29 May 2022
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as in the manual...
OPTION SDCARD CSpin, CLKpin, MOSIpin, MISOpin

you connect it:
OPTION SDCARD GP22, GP5, GP18, GP19

If you connect the SDcard CS pin to GP22

:)
Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs
 
goc30

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Posted: 01:53am 01 Jun 2022
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I come back with my problems to use the Eval card from WaveShare.
I can now manage my SD card, I managed to get the RGB LED to work, but I still have the Buzzer problem

buzzer is on gp14

1 -  with beep function in gui touch (beep option).
For that I use "gui_demo.bas" who is ref for testing beep


> option list
OPTION SYSTEM SPI GP10,GP11,GP12
OPTION SYSTEM I2C GP6,GP7
OPTION LCDPANEL ILI9488W, LANDSCAPE,GP8,GP15,GP9,GP13
OPTION TOUCH GP16,GP17,GP14
GUI CALIBRATE 0, 3975, 109, -1291, 843
OPTION SDCARD GP22, GP5, GP18, GP19
> load "gui_demo.bas"
> run
[45] GUI Caption c_head, "Pump Control", 10, 0
Error : No memory allocated for GUI controls
>


and function "beep 200" give no "sound"

2 - if I want to use the PWM signal from the GP14 (PWM 7A) micromite refuses channel 7. In addition, pin GP15 (PWM7B) is used by the screen. The PLAY TONE function requires declaring the "AUDIO OPTION" option with the two channels 7A and 7B (which is not available.
In short whether with PWM or with PLAY TONE impossible to operate the buzzer in single channel
Edited 2022-06-01 11:54 by goc30
 
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