merge and fix the remote repo

LICENSE

@@ -0,0 +1,95 @@
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README.md

@@ -0,0 +1,130 @@
+% OPIO(1) opio v2.1
+% Pat Beirne <patb@pbeirne.com>
+% Oct 2021
+
+# NAME
+opio - Control GPIO pins on OrangePi. A replacement for WiringPi
+
+# SYNOPSIS
+**opio** [-2] readall {or status} 
+
+**opio** [-2] readallx {or statusx}
+
+**opio** [-2] exports
+
+**opio** leds
+
+**opio** mode *pin* [ in | out | alt ]
+
+**opio** [ -d ] read *pin*
+
+**opio** [ -d ] write *pin* [ 1 | 0 | on | off ]
+
+# DESCRIPTION
+**opio** allows access to the GPIO pins of OrangePi single-board computers. This version is designed speciifically for the
+
+- OrangePi i96
+- OrangePi 2G-iot
+
+Running **opio** without any parameters will show its usage. **opio** requires 'su' permissions, so must be run as 'root' or via 'sudo'.
+
+# COMMANDS
+**readall** or **status**
+: Displays the state of the gpio pins in a grid format. The list includes all the pins used in the on-board 40 pin connector. For each pin, the listing shows the gpio pin number, its alternate function, its i96 pin name, its current _mode_ and _value_, and the corresponding pin number on the 40 pin connector.
+
+**readallx** or **statusx**
+: Creates a similar chart, but includes the RDA pin names and Linux device driver names. 
+
+**leds** 
+: Creates a smaller chart, for the interesting I/O pins which are _not_ part of the 40 pin connector. On the i96 board, there are 3 LEDs which can be controlled via **opio**
+
+**exports**
+: Print a list of current entries in /sys/class/gpio, indicating which pins have been exported (prepared for read/write). If a gpio pin exists on the 40 pin connector, the pin number is listed.
+
+**mode**
+: Sets the _mode_ for a pin as either 'in', 'out' or 'alternate-function'. Normally **opio** will create an export for this gpio pin, and then set the direction. If you set the 'alt' function, the export will be removed. With the **-d** option, the export is not created, but the 'in'/'out'/'alt' _mode_ setting will still be done.
+
+- **mode** with a pin number and no set-mode request, will simply return the current _mode_ (in, out, alt, in\*, alt\*).
+
+**read**
+: Returns the current _value_ (1/0) of the gpio pin, if possible. If the pin is in 'alt' _mode_, it is changed to 'in' before the _value_ is read.
+
+**write**
+: Attempts to write the given _value_ into the given pin. If the pin is in 'alt' _mode_, it is changed to 'out' before the _value_ is asserted.
+
+# OPTIONS
+**-d**
+: Use low-level access to control the pins. Without the **-d** option, **opio** tries to use the 'export' gpio mechanism (at /sys/class/gpio). The **-d** option only applies to **mode, read** and **write**
+
+**-2**
+: Use the pin assignments for the OrangePi-2G-iot. The default is to use the pins for the OrangePi-i96. If you wish to make this option persistent, create a file named /etc/OrangePi_2G_IOT.
+
+## Mode
+The microcontroller used on these boards presents i/o pins which can be set to 'general usage' GPIO as 'input' or 'output, or alternatively, set to operate in a specific way (uart, i2c, i2s, pcm, etc). **opio** refers the the current _mode_ of each pin one of these: either GPIO 'in', GPIO 'out', or 'alt'ernate function. 
+
+The 'in\*' or 'out\*' are marked with an asterisk to indicate that the pin is in GPIO _mode_, but _not_ listed in the current 'export' list.
+
+As a convenience, the **read** and **write** commands will automatically set the _mode_ on the GPIO pin and create an export. So, generally, the **mode** command is only *required* if you wish to change a pin back to its 'alt' function.
+
+# HERITAGE
+This program is styled after the **gpio** program written by Gordon Henderson for the Raspberry Pi.
+Unlike the original **gpio** program, this one does not implement:
+
+- export...........exports are created automatically by **mode, read** and **write**
+- pwm, clk.........this microcontroller does not have PWM or CLK type pins
+- aread, awrite....these boards have not connected and ADC/DAC pins
+
+# NUMBERING
+There are 4 naming schemes used to identify pins in these boards. **opio** uses exclusively the Linux gpio device driver numbers, the first on this list:
+
+- Linux gpio numbers (from /sys/class/gpio)
+- I/O connector pin numbers (1-40)
+- RDA microcontroller pin names (like GPIOA_C23)
+- i96 pin names (like GPIOB)
+
+You can explore the correspondence between these naming schemes with **opio readall** and **opio readallx**
+
+# HIGH LEVEL/LOW LEVEL ACCESS
+Normally, **opio** will access the GPIO pins through the Linux gpio device driver, and the corresponding files at `/sys/class/gpio`. This is _high level_ access.
+
+If you wish to bypass the Linux gpio driver, add the `-d` option to the **opio** command line and the reads/writes will be done at a _low level_, directly on the machine's registers.
+
+The commands **readall, readallx** and **leds** are always done using _low level_ access. The **exports** command is always done with _high level_ commands.
+
+Be careful about making changed with the **-d** option. Some linux gpio drivers will cache the direction and value, so changes you make with the **-d** option may not be reflected in the export folder.
+
+# EXAMPLES
+
+display a chart of the pin assignments of the 40 pin connector:
+
+    opio readall     
+
+list the currently 'exported' pins: 
+
+    opio exports
+
+
+set gpio 15 to an output; also create an export for gpio15
+...then flash the pin (gpio15 Linux number): 
+
+    opio mode 15 out    
+    opio write 15 on
+    sleep 2
+    opio write 15 off   
+
+set gpio 15 to an output; do *not* create an export
+
+    opio -d mode 15 out 
+
+write to gpio15 pin, bypassing the export mechanism
+
+    opio -d write 15 on  
+
+
+**NOTE** The more recent /dev/gpio driver is not yet available on these boards, since they're running the 3.xx kernels.
+
+**NOTE** The 2G-IOT board uses the I2C1 bus to communicate with the modem chip. This is i2c-0 in the kernel, and is pins 3 & 5 on the 40 pin connector. Do not use these pins to connect to peripherals. And do not use **opio** to modify the _mode_ of these pins.
+
+**NOTE** The 2G-IOT board uses the I2C3 bus to communicate with the LCD. If you are using an LCD in the socket, do _not_ change the mode on pins 38 & 40.
+
+**NOTE** To create a man page, run `pandoc README.md -s -t man -o opio.1`

opio

@@ -1,5 +1,4 @@
 #!/usr/bin/python3
-# TODO: add board detection /var/local (but check /etc and /usr/local/etc as well)
 """
   This is a clone of the 'gpio/WiringPi' project, written specifically for the
   OrangePi i96.
@@ -53,19 +52,21 @@ from mmap import mmap
 from struct import pack, unpack
 import os, sys, argparse, pathlib, re, logging
 
-
+VERSION = "2.1"
 
 ############ board specific
 
 class Board:
-  def __init__(self,full_name,short_name):
+  def __init__(self,full_name,short_name,config_file):
     self.name = full_name
     self.short_name = short_name
+    self.config_file = config_file
   def __repr__(self):
     return self.name
 
-board_i96 = Board("OrangePi i96",  "OrangePi i96")
-board_2g = Board("OrangePi 2G-IOT","OrgPi 2G-iot")
+board_i96 = Board("OrangePi i96",  "OrangePi i96", "/etc/OrangePi-i96")
+board_2g = Board("OrangePi 2G-IOT","OrgPi 2G-iot", "/etc/OrangePi-2g-iot")
+
 
 # pins, arranged according to i96 connector
 # i96 label, rda_port number, pio number, rda special function
@@ -225,8 +226,6 @@ cpu_rda = Cpu("RDA8810")
 cpu_rda.IOMUX_ADDRESSES = (RDA_PORTA_IOMUX, RDA_PORTB_IOMUX, RDA_PORTD_IOMUX, RDA_PORTC_IOMUX)
 
 cpu = cpu_rda
-board = board_i96
-#board = board_2g
 
 GPIO_PER_PORT = 32
 
@@ -248,11 +247,10 @@ def mem_set(address, bitmask, value):
       data = unpack("<L",mem[address:address+4])[0] 
       logging.debug("mem_set: current data is {} mask is {} value is {}".format(hex(data),hex(bitmask),value))
       if value:
-        logging.debug("!! wtf? value is {} {} {}".format(value,bool(value),type(value)))
         data |= bitmask
       else:
         data &= ~bitmask
-      logging.debug("mem_set: resulting data is {} ~mask is {} {}".format(hex(data),hex(~bitmask),hex(data & ~bitmask)))
+      logging.debug("mem_set: resulting data is {}".format(hex(data)))
       mem[address:address+4] = pack("<L",data)
   except PermissionError:
     print("failed to open /dev/mem.....you must execute this script as root")
@@ -381,7 +379,7 @@ PORTC_IOBASE = 0x11a08000
 PORTD_IOBASE = 0x20932000
 IOBASE_ADDRESSES = (PORTA_IOBASE, PORTB_IOBASE, PORTD_IOBASE, PORTC_IOBASE)
 
-IO_DIR = 0   # [0=out,1=in] +0 direct access, +4 for the clr-reg, +8 for the set-reg 
+IO_DIR = 0   # [0=out,1=in] +0 direct access, +4 = clr-reg(out), +8 = set-reg(in) 
 IO_DATA = 0xc # +0 direct access, +4 for set-reg, +8 for clr-reg
 
 def low_level_read(gpio, address_offset):
@@ -407,6 +405,30 @@ def low_level_set_mode(gpio, mode):
 def low_level_get_mode(gpio):
   return low_level_read(gpio, IO_DIR)  
 
+######################### detect board ###################
+# the 2gio has the B3 pin pulled up
+# the i96 board leaves the B3 pin floating
+B3 = 35
+board = board_i96
+
+def board_auto_sense(args):
+  global board
+  if args.cmd in {"readll","readallx","status","statusx","leds","exports"}:
+    if pathlib.Path(board_2g.config_file).exists() or args.op2giot:
+      board = board_2g
+    elif pathlib.Path(board_i96.config_file).exists() or args.i96:
+      board = board_i96
+    else:
+      low_level_set_mode(B3, "out")
+      low_level_write(B3, IO_DATA, 1)
+      low_level_set_mode(B3, "in")
+      a = low_level_read(B3, IO_DATA)
+      low_level_set_mode(B3, "out")
+      low_level_write(B3, IO_DATA, 0)
+      low_level_set_mode(B3, "in")
+      b = low_level_read(B3, IO_DATA)
+      board = board_2g if b else board_i96
+      print("Board auto-detect found {}. To skip auto-detect, create a file named {}".format(board.short_name,board.config_file))
 
 ########################### actions #######################
 
@@ -559,19 +581,18 @@ args = None
 if __name__ == "__main__":
   #logging.basicConfig(stream=sys.stderr, level=logging.DEBUG)
   #logging.basicConfig(stream=sys.stderr, level=logging.INFO)
-  parser = argparse.ArgumentParser()
-  parser.add_argument('-v','--version', action='version', version='gpio 2.0\n   python rewrite by Pat Beirne')
+  parser = argparse.ArgumentParser(description = "Access GPIO on the OrangePi RDA boards")
+  parser.add_argument('-v','--version', action='version', 
+   version="opio "+VERSION+" -- python rewrite of gpio; by Pat Beirne")
   parser.add_argument('cmd',help="one of: read, write, mode, readall, readallx")
   parser.add_argument('gpio',nargs='?',type=int,help="gpio number 0...126")
   parser.add_argument('extra',nargs='?')
   parser.add_argument('-d',"--direct",help="use low-level access",action="store_true")
-  parser.add_argument('-2',"--op2giot",help="configure for OrangePi 2G-iot",action="store_true")
+  parser.add_argument('-2',"--op2giot",help="configure for OrangePi 2G-iot [disable auto-detect]",action="store_true")
+  parser.add_argument('-9',"--i96",help="configure for OrangePi i96 [disable auto-detect]",action="store_true")
   args = parser.parse_args()
 
-  if pathlib.Path('/etc/OrangePi_2G_IOT').exists():
-    board = board_2g
-  if args.op2giot:
-    board = board_2g
+  board_auto_sense(args)
  
   switcher = {"readall":do_readall, 
          "readallx":do_readallx,
@@ -581,6 +602,8 @@ if __name__ == "__main__":
          "mode":do_mode,
          "read":do_read,
          "write":do_write,
+         "in":do_read,
+         "out":do_write,
          "exports":do_exports}
   f = switcher.get(args.cmd)
   if not f:

opio.1

@@ -1,6 +1,6 @@
 .\" Automatically generated by Pandoc 2.9.2.1
 .\"
-.TH "OPIO" "1" "Aug 2021" "opio v1.0" ""
+.TH "OPIO" "1" "Oct 2021" "opio v2.1" ""
 .hy
 .SH NAME
 .PP
@@ -8,9 +8,9 @@ opio - Control GPIO pins on OrangePi.
 A replacement for WiringPi
 .SH SYNOPSIS
 .PP
-\f[B]opio\f[R] [-2] readall
+\f[B]opio\f[R] [-2] readall {or status}
 .PP
-\f[B]opio\f[R] [-2] readallx
+\f[B]opio\f[R] [-2] readallx {or statusx}
 .PP
 \f[B]opio\f[R] [-2] exports
 .PP
@@ -36,7 +36,7 @@ Running \f[B]opio\f[R] without any parameters will show its usage.
 via `sudo'.
 .SH COMMANDS
 .TP
-\f[B]readall\f[R]
+\f[B]readall\f[R] or \f[B]status\f[R]
 Displays the state of the gpio pins in a grid format.
 The list includes all the pins used in the on-board 40 pin connector.
 For each pin, the listing shows the gpio pin number, its alternate
@@ -44,8 +44,9 @@ function, its i96 pin name, its current \f[I]mode\f[R] and
 \f[I]value\f[R], and the corresponding pin number on the 40 pin
 connector.
 .TP
-\f[B]readallx\f[R]
-Creates a similar chart, but includes the RDA pin names.
+\f[B]readallx\f[R] or \f[B]statusx\f[R]
+Creates a similar chart, but includes the RDA pin names and Linux device
+driver names.
 .TP
 \f[B]leds\f[R]
 Creates a smaller chart, for the interesting I/O pins which are
@@ -54,8 +55,8 @@ On the i96 board, there are 3 LEDs which can be controlled via
 \f[B]opio\f[R]
 .TP
 \f[B]exports\f[R]
-Print a list of entries in /sys/class/gpio, indicating which pins have
-been exported (prepared for read/write).
+Print a list of current entries in /sys/class/gpio, indicating which
+pins have been exported (prepared for read/write).
 If a gpio pin exists on the 40 pin connector, the pin number is listed.
 .TP
 \f[B]mode\f[R]
@@ -66,6 +67,7 @@ then set the direction.
 If you set the `alt' function, the export will be removed.
 With the \f[B]-d\f[R] option, the export is not created, but the
 `in'/`out'/`alt' \f[I]mode\f[R] setting will still be done.
+.IP \[bu] 2
 \f[B]mode\f[R] with a pin number and no set-mode request, will simply
 return the current \f[I]mode\f[R] (in, out, alt, in*, alt*).
 .TP
@@ -155,8 +157,9 @@ The \f[B]exports\f[R] command is always done with \f[I]high level\f[R]
 commands.
 .PP
 Be careful about making changed with the \f[B]-d\f[R] option.
-Some linux gpio drivers will direction and value, so changes you make
-with the \f[B]-d\f[R] option may not be reflected in the export folder.
+Some linux gpio drivers will cache the direction and value, so changes
+you make with the \f[B]-d\f[R] option may not be reflected in the export
+folder.
 .SH EXAMPLES
 .PP
 display a chart of the pin assignments of the 40 pin connector:
@@ -217,5 +220,8 @@ pins.
 the LCD.
 If you are using an LCD in the socket, do \f[I]not\f[R] change the mode
 on pins 38 & 40.
+.PP
+\f[B]NOTE\f[R] To create a man page, run
+\f[C]pandoc README.md -s -o opio.1\f[R]
 .SH AUTHORS
 Pat Beirne <patb@pbeirne.com>.