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disco4now

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Posted: 01:17pm 07 Jun 2021

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The pin functional designation is zero numbered. So I2C will use i2c0sda and I2C2 will use i2c1sda. A bit confusing at first look.
COM1 will probably use UART0RX/UART0TX when it comes.
COM2 will probably use UART1RX/UART1TX when it comes.
Edited 2021-06-07 23:23 by disco4now

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matherp
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Posted: 01:20pm 07 Jun 2021

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Quote The I2Cs are I2C (channel 1) and I2C2 (channel 2), so shouldn't the SETPINs refer to i2c2sda and i2c2scl in this example?

This one is a no win. The pins are labelled I2C0SDA, I2C0SCL, I2C1SDA and I2C1SCL

However, all versions of MMBasic use I2C for the standard I2C channel (in this case I2C0) and I2C2 for the second channel (in this case I2C1)

I could change it to I2C (implies 0) and I2C1 - thoughts ?

lizby
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Posted: 02:02pm 07 Jun 2021

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This works for me to flash LEDs on an MCP23017:

' MCP23017.bas

const mcp23017 = &h20 ' A2, A1, A0, R/W all connected to 0V
Const i2caddr=mcp23017
const IODIRA = &h00 ' Port A IO Direction register DEFAULT = I/P
const IODIRB = &h01 ' Port B IO Direction register DEFAULT = I/P
const IOCON = &h0A ' IO Expander config register - address &h0B accesses the same register
const GPIOA = &h12 ' Port A General purpose register
const GPIOB = &h13 ' Port B General Purpose register
const OLATA = &h14 ' Port A latch register
const OLATB = &h15 ' Port B latch register
const GPUPB = &h0D ' Port B pull-up register

SetPin 14,i2c1sda
SetPin 15,i2c1scl

I2C2 open 100, 1000
I2C2 WRITE MCP23017,0,2,IODIRA,0 ' set direction to output
I2C2 WRITE MCP23017,0,2,IODIRB,0 ' set direction to output
' I2C2 WRITE MCP23017,0,2,GPUPB,&h3f ' set weak pullups on all except bits 6&7

do
mcp17
loop

sub mcp17
' I2C2 WRITE MCP23017,0,2,IODIRA,0 ' set direction to output
' I2C2 WRITE MCP23017,0,2,IODIRB,0 ' set direction to output
print "write to mcp23017"
for i = 1 to 6
I2C2 Write MCP23017,0,2,OLATA,&b10101010 '
I2C2 Write MCP23017,0,2,OLATB,&b01010101 '
PAUSE 1000
I2C2 Write MCP23017,0,2,OLATA,&b01010101 '
I2C2 Write MCP23017,0,2,OLATB,&b10101010 '
PAUSE 1000
Next i
I2C2 Write MCP23017,0,2,OLATA,0 ' turn all off
I2C2 Write MCP23017,0,2,OLATB,0 ' turn all off
pause 1000
end sub

~
Edited 2021-06-08 00:11 by lizby

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matherp
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Posted: 02:10pm 07 Jun 2021

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a20 again

PicomiteV5.07.00a20.zip

For some sort of consistency I've changed it to

I2C for channel 0 (I2C0SDA,I2C0SCL)
and
I2C1 for channel 1 (I2C1SDA,I2C1SCL)

Breaks my example and Lizby's test but just global replace I2C2 by I2C1

Note to Lizby: If you stored your program in flash then after changing the firmware the program will have edited itself - confused the f..k out of me until I realised it the displayed text is the token expansion

Edited 2021-06-08 00:21 by matherp

Mixtel90

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Posted: 02:40pm 07 Jun 2021

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I can't test this.

I never could get a I2C 1602 LCD text display to work. lol I never had problems with them in parallel mode, but I don't have the magical touch for I2C. :)

I like the idea of using I2C and I2C1 purely for compatibility in the MMBasic family.

I assume it works with:

SETPIN pin, I2C0, SDA
SETPIN pin, I2C0, SCL
I2C OPEN speed,timeout
I2C WRITE addr, option, sendlen, senddata [,senddata ...]
I2C READ addr, option, rcvlen, revbuf
I2C CLOSE

SETPIN pin, I2C1, SDA
SETPIN pin, I2C1, SCL
I2C1 OPEN speed,timeout
I2C1 WRITE addr, option, sendlen, senddata [,senddata ...]
I2C1 READ addr, option, rcvlen, revbuf
I2C1 CLOSE
Edited 2021-06-08 00:46 by Mixtel90

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lizby
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Posted: 02:45pm 07 Jun 2021

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matherp said For some sort of consistency I've changed it to

I2C for channel 0 (I2C0SDA,I2C0SCL)
and
I2C1 for channel 1 (I2C1SDA,I2C1SCL)

Breaks my example and Lizby's test but just global replace I2C2 by I2C1

Note to Lizby: If you stored your program in flash then after changing the firmware the program will have edited itself - confused the f..k out of me until I realised it the displayed text is the token expansion

No problem. I2C1 works.

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matherp
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Posted: 03:02pm 07 Jun 2021

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Quote I assume it works with:

spurious commas

Quote I2C1, SDA

Mixtel90

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Posted: 03:10pm 07 Jun 2021

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Thanks Peter. Just keeping my info updated in this case. :)

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Mixtel90

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Posted: 03:45pm 07 Jun 2021

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Yay! G8JCF did a Micromite library for this 1602 LCD display in 2014. Adding:
SetPin 16, I2C0sda
SetPin 17, I2C0scl
has made it run on the Picomite. Note, folks, this is the first time I've had one of these running. :)

I've not been able to move it onto different pins though, not even if they are specified alternatives for I2C0.

Edit:
Don't know what I was doing wrong, but I *can* move it to any I2C0 pins as expected. :)

Edit:
Updated & cleaned up. Now easy to see if you have the latest version.

Picomite a9.zip
.
.
Edited 2021-06-08 06:58 by Mixtel90

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matherp
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Posted: 09:57pm 07 Jun 2021

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a21

PicomiteV5.07.00a21.zip

SPI now implemented

SPI[1] OPEN freq, mode [,bits]

bits per transfer can be between 4 and 16

e.g. connect pin 20 to pin 16

setpin 19,spi1sck
setpin 20,spi1tx
setpin 16,api1rx
spi1 open 1000000,0
? spi1(123)

Use SPI1 command and function for SPI1aaa pins and SPI for spi0aaa pins

Change to SDcard options to prepare for LCD panels and touch

Use

OPTION SYSTEM SPI CLKpin, MOSIpin, MISOpin

to define the pins that will be used for the SDcard, the LCD panel and the touch controller

Use

OPTION SDCARD CSpin

To define the pin that is used for the SDcard chip select

Coming:

OPTION LCDPANEL type, RSpin, RESETpin, LCDCSpin
OPTION TOUCH IRQpin, CSpin

Edited 2021-06-08 08:01 by matherp

palcal

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Posted: 10:51pm 07 Jun 2021

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@ Mixtel90
One typo in your doc.

Quote SD card no longer fonfigured by default.

"It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all"

lizby
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Posted: 11:50pm 07 Jun 2021

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a21 SD working:

> OPTION SYSTEM SPI 4,5,6
> OPTION SDCARD 7
> files
A:/
1280 benchmark.bas
26240 ccpico.bas
11008 gui.bas
36 hello.bas
15104 loadtest.bas
20096 loadtest20.bas
24064 loadtest24.bas
27136 loadtest27.bas
1444 mcp23017.bas
4250 ta.bas
4700 tain.txt
1148 taout.txt
171 test1.bas
15 test2.bas
43 test3.bas
15 test4.bas
0 directories, 16 files

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led-bloon

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Posted: 01:29am 08 Jun 2021

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a21 fully loaded with SD card working great also.
Another silly one!
Incorrectly entered your small SPI test code:

setpin 19,spi1clk
setpin 19,spi1tx
Got:
Error: Invalid configuration <<<< Good
setpin 20,spi1tx
setpin 16,spi1rx
spi1 open 1000000,0
Got:
Error: Pin 99 is invalid <<<< oops!

The SPI port was opened and working ok, however.
Trying to open the port again would give the error
"already open" which is correct.

Another silly:
> option list
OPTION SYSTEM SPI GP2 ,GP3 ,GP4
The <space> char after the GPn and before the <comma> char

Anyhow, thanks for all your hard work
led

Edit: added option list stuff
Edited 2021-06-08 11:42 by led-bloon

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Volhout
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Posted: 08:43am 08 Jun 2021

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Servo's work with a21.

'dual Servo sweep

'defines
FREQ=50 'Hz
PERIOD=1E6/FREQ 'us
PWmin=800 'us
PWmax=2200 'us
DCmin=100*PWmin/PERIOD '%
DCmax=100*PWmax/PERIOD '%
ANmin=-90 'degrees
ANmax=+90 'degrees

'calculates
DCrange=DCmax-DCmin
ANrange=ANmax-ANmin

'IO setup
SetPin 1,pwm0a
SetPin 2,pwm0b

'Sweep servo
Do
'min->max sweep
For angle = ANmin To ANmax Step 1
DC = DCmin + ((angle-ANmin)/ANrange)*DCrange
PWM 0,FREQ,DC,DC
Pause 20
Next angle
'max->min sweep
For angle = ANmax To ANmin Step -1
DC = DCmin + ((angle-ANmin)/ANrange)*DCrange
PWM 0,FREQ,DC,DC
Pause 20
Next angle
Loop
End

PicomiteVGA PETSCII ROBOTS

CaptainBoing

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Posted: 09:03am 08 Jun 2021

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matherp said a21

setpin 19,spi1sck
setpin 20,spi1tx
setpin 16,api1rx
spi1 open 1000000,0
? spi1(123)

Tx/Rx are confusing because they are subjective. SPI uses MOSI/MISO which leaves no doubt

setpin 20,SPI1MOSI
setpin 16,SPI1MISO

is much better IMO

I am glad the hard CS has been dispensed-with

my 2p
Edited 2021-06-08 19:04 by CaptainBoing

matherp
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Posted: 09:10am 08 Jun 2021

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Quote setpin 20,SPI1MOSI
setpin 16,SPI1MISO

is much better IMO

You may be right but I am using Raspberry's own pin naming

Mixtel90

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Posted: 10:30am 08 Jun 2021

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a21 - with a SD card now. :)

Having a play with PWM on pin 24.

Had to use
SETPIN 24, PWM1A to get it to work - PWM0A didn't work (don't know if it should)

pwm works, but can't set 0% (may not matter, but can set 100%. 0% *is* 100%!)

PWM 1, OFF didn't work

MM.INFO$(PIN 24) gives PWM3A

PWM 3, off didn't seem to work but
PWM 1, off then switched the LED off

Pin 24 wasn't released.
tried to release it with
setpin, 24 off but got
Error: Pin 24 is in use

Should the pin have been released automatically?

I've seen a diagram of which pins are which PWMs somewhere, but I can't find it now. That may reveal the PWM1/PWM3 issue.

Edit:
Found it on page 101 of "Getting started with MicroPython"
It shows pin 24 as PWM_A[1] so I guess that's PWM1A so that bit's right. It ties in with Peter's chart too - which is where I should have looked...

Edited 2021-06-08 20:55 by Mixtel90

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matherp
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Posted: 11:25am 08 Jun 2021

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a22

PicomiteV5.07.00a22.zip

Minor fixes

Quote SETPIN 24, PWM1A to get it to work - PWM0A didn't work (don't know if it should)

See table

Quote pwm works, but can't set 0% (
PWM 1, OFF didn't work
MM.INFO$(PIN 24) gives PWM3A

Fixed

const struct s_PinDef PinDef[NBRPINS + 1]={
{ 0, 99, "NULL", UNUSED ,99}, // pin 0
{ 1, 0, "GP0 ", DIGITAL_IN | DIGITAL_OUT | UART0TX | SPI0RX | I2C0SDA | PWM0A,99}, // pin 0
{ 2, 1, "GP1 ", DIGITAL_IN | DIGITAL_OUT | UART0RX | I2C0SCL | PWM0B ,99}, // pin 1
{ 3, 99, "GND ", UNUSED ,99}, // pin 2
{ 4, 2, "GP2 ", DIGITAL_IN | DIGITAL_OUT | SPI0SCK | I2C1SDA | PWM1A ,99}, // pin 3
{ 5, 3, "GP3 ", DIGITAL_IN | DIGITAL_OUT | SPI0TX | I2C1SCL | PWM1B ,99}, // pin 4
{ 6, 4, "GP4 ", DIGITAL_IN | DIGITAL_OUT | UART1TX | SPI0RX | I2C0SDA | PWM2A ,99}, // pin 5
{ 7, 5, "GP5 ", DIGITAL_IN | DIGITAL_OUT | UART1RX | I2C0SCL | PWM2B ,99}, // pin 6
{ 8, 99, "GND ", UNUSED ,99}, // pin 7
{ 9, 6, "GP6 ", DIGITAL_IN | DIGITAL_OUT | SPI0SCK | I2C1SDA | PWM3A ,99}, // pin 8
{ 10, 7, "GP7 ", DIGITAL_IN | DIGITAL_OUT | SPI0TX | I2C1SCL | EXT_PWM3B ,99}, // pin 9
{ 11, 8, "GP8 ", DIGITAL_IN | DIGITAL_OUT | UART1TX | SPI1RX | I2C0SDA | PWM4A ,99}, // pin 10
{ 12, 9, "GP9 ", DIGITAL_IN | DIGITAL_OUT | UART1RX | I2C0SCL | PWM4B ,99}, // pin 11
{ 13, 99, "GND ", UNUSED ,99}, // pin 12
{ 14, 10, "GP10", DIGITAL_IN | DIGITAL_OUT | SPI1SCK | I2C1SDA | PWM5A ,99}, // pin 13
{ 15, 11, "GP11", DIGITAL_IN | DIGITAL_OUT | SPI1TX | I2C1SCL | PWM5B ,99}, // pin 14
{ 16, 12, "GP12", DIGITAL_IN | DIGITAL_OUT | UART0TX | SPI1RX | I2C0SDA | PWM6A ,99}, // pin 15
{ 17, 13, "GP13", DIGITAL_IN | DIGITAL_OUT | UART0RX | I2C0SCL | PWM6B ,99}, // pin 16
{ 18, 99, "GND ", UNUSED ,99}, // pin 17
{ 19, 14, "GP14", DIGITAL_IN | DIGITAL_OUT | SPI1SCK | I2C1SDA | PWM7A ,99}, // pin 18
{ 20, 15, "GP15", DIGITAL_IN | DIGITAL_OUT | SPI1TX | I2C1SCL | PWM7B ,99}, // pin 19

{ 21, 16, "GP16", DIGITAL_IN | DIGITAL_OUT | UART0TX | SPI0RX | I2C0SDA | PWM0A ,99}, // pin 21
{ 22, 17, "GP17", DIGITAL_IN | DIGITAL_OUT | UART0RX | I2C0SCL | PWM0B ,99}, // pin 22
{ 23, 99, "GND ", UNUSED ,99}, // pin 23
{ 24, 18, "GP18", DIGITAL_IN | DIGITAL_OUT | SPI0SCK | I2C1SDA | PWM1A ,99}, // pin 24
{ 25, 19, "GP19", DIGITAL_IN | DIGITAL_OUT | SPI0TX | I2C1SCL | PWM1B ,99}, // pin 25
{ 26, 20, "GP20", DIGITAL_IN | DIGITAL_OUT | I2C0SDA | PWM2A ,99}, // pin 26
{ 27, 21, "GP21", DIGITAL_IN | DIGITAL_OUT | I2C0SCL | PWM2B ,99}, // pin 27
{ 28, 99, "GND ", UNUSED ,99}, // pin 28
{ 29, 22, "GP22", DIGITAL_IN | DIGITAL_OUT | PWM3A ,99}, // pin 29
{ 30, 99, "RUN ", UNUSED ,99}, // pin 30
{ 31, 26, "GP26", DIGITAL_IN | DIGITAL_OUT | ANALOG_IN | I2C1SDA | PWM5A , 0 }, // pin 31
{ 32, 27, "GP27", DIGITAL_IN | DIGITAL_OUT | ANALOG_IN | I2C1SCL | PWM5B , 1 }, // pin 32
{ 33, 99, "AGND", UNUSED ,99}, // pin 33
{ 34, 28, "GP28", DIGITAL_IN | DIGITAL_OUT | ANALOG_IN | PWM6A , 2 }, // pin 34
{ 35, 99, "VREF", UNUSED ,99}, // pin 35
{ 36, 99, "3V3 ", UNUSED ,99}, // pin 36
{ 37, 99, "3V3E", UNUSED ,99}, // pin 37
{ 38, 99, "GND ", UNUSED ,99}, // pin 38
{ 39, 99, "VSYS", UNUSED ,99}, // pin 39
{ 40, 99, "VBUS", UNUSED ,99}, // pin 40
{ 41, 25, "GP25", DIGITAL_OUT | PWM4B ,99 }, // pin 41
};

Mixtel90

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Posted: 12:40pm 08 Jun 2021

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a22
"Minor fixes"
That's what we like to hear, Peter. lol
Thanks, that seems to be working a treat now.

Incidentally, I made a similar style SD breakout module to your own but omitted the supply rail cap. Power leads are pretty short so I figured I'd probably get away with it. It's working fine. :)

Mick

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matherp
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Posted: 01:03pm 08 Jun 2021

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Quote MM.INFO$(PIN 24) gives PWM3A

I'm now using this

OPTION SDCARD GP15
OPTION SYSTEM SPI GP10,GP11,GP12

Edited 2021-06-08 23:04 by matherp

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