summaryrefslogtreecommitdiffstatshomepage
path: root/docs/library
diff options
context:
space:
mode:
authorDaniel Campora <daniel@wipy.io>2015-08-02 20:20:03 +0200
committerDaniel Campora <daniel@wipy.io>2015-08-02 20:22:15 +0200
commitc6926c374dc0408d7ef8fa6385207430c122e6cf (patch)
tree2318255e7b545b6a6756e8dce6d1ee4b87e32d10 /docs/library
parent3a2fb201a52367286d25bede4612c73b6a1cd4b9 (diff)
downloadmicropython-c6926c374dc0408d7ef8fa6385207430c122e6cf.tar.gz
micropython-c6926c374dc0408d7ef8fa6385207430c122e6cf.zip
cc3200: Make I2C and SPI API the same as in stmhal.
Diffstat (limited to 'docs/library')
-rw-r--r--docs/library/pyb.I2C.rst162
-rw-r--r--docs/library/pyb.SPI.rst87
2 files changed, 66 insertions, 183 deletions
diff --git a/docs/library/pyb.I2C.rst b/docs/library/pyb.I2C.rst
index d3cbed0574..7c22a700b9 100644
--- a/docs/library/pyb.I2C.rst
+++ b/docs/library/pyb.I2C.rst
@@ -45,11 +45,9 @@ To receive inplace, first create a bytearray::
data = bytearray(3) # create a buffer
i2c.recv(data) # receive 3 bytes, writing them into data
-.. only:: port_pyboard
+You can specify a timeout (in ms)::
- You can specify a timeout (in ms)::
-
- i2c.send(b'123', timeout=2000) # timout after 2 seconds
+ i2c.send(b'123', timeout=2000) # timout after 2 seconds
A master must specify the recipient's address::
@@ -57,29 +55,15 @@ A master must specify the recipient's address::
i2c.send('123', 0x42) # send 3 bytes to slave with address 0x42
i2c.send(b'456', addr=0x42) # keyword for address
-.. only:: port_pyboard
-
- Master also has other methods::
-
- i2c.is_ready(0x42) # check if slave 0x42 is ready
- i2c.scan() # scan for slaves on the bus, returning
- # a list of valid addresses
- i2c.mem_read(3, 0x42, 2) # read 3 bytes from memory of slave 0x42,
- # starting at address 2 in the slave
- i2c.mem_write('abc', 0x42, 2, timeout=1000)
-
-.. only:: port_wipy
-
- There are also other methods::
-
- i2c.is_ready(0x42) # check if slave 0x42 is ready
- i2c.scan() # scan for slaves on the bus, returning
- # a list of valid addresses
- i2c.mem_read(3, 0x42, 2) # read 3 bytes from memory of slave 0x42,
- # starting at address 2 in the slave
- i2c.mem_write('abc', 0x42, 2) # write 'abc' (3 bytes) to memory of slave 0x42
- # starting at address 2 in the slave
+Master also has other methods::
+ i2c.is_ready(0x42) # check if slave 0x42 is ready
+ i2c.scan() # scan for slaves on the bus, returning
+ # a list of valid addresses
+ i2c.mem_read(3, 0x42, 2) # read 3 bytes from memory of slave 0x42,
+ # starting at address 2 in the slave
+ i2c.mem_write('abc', 0x42, 2, timeout=1000) # write 'abc' (3 bytes) to memory of slave 0x42
+ # starting at address 2 in the slave, timeout after 1 second
Constructors
------------
@@ -102,7 +86,7 @@ Constructors
.. only:: port_wipy
.. class:: pyb.I2C(bus, ...)
-
+
Construct an I2C object on the given bus. `bus` can only be 1.
With no additional parameters, the I2C object is created but not
initialised (it has the settings from the last initialisation of
@@ -141,118 +125,58 @@ Methods
Check if an I2C device responds to the given address. Only valid when in master mode.
-.. only:: port_pyboard
+.. method:: i2c.mem_read(data, addr, memaddr, timeout=5000, addr_size=8)
- .. method:: i2c.mem_read(data, addr, memaddr, timeout=5000, addr_size=8)
-
- Read from the memory of an I2C device:
-
- - ``data`` can be an integer (number of bytes to read) or a buffer to read into
- - ``addr`` is the I2C device address
- - ``memaddr`` is the memory location within the I2C device
- - ``timeout`` is the timeout in milliseconds to wait for the read
- - ``addr_size`` selects width of memaddr: 8 or 16 bits
+ Read from the memory of an I2C device:
- Returns the read data.
- This is only valid in master mode.
+ - ``data`` can be an integer (number of bytes to read) or a buffer to read into
+ - ``addr`` is the I2C device address
+ - ``memaddr`` is the memory location within the I2C device
+ - ``timeout`` is the timeout in milliseconds to wait for the read
+ - ``addr_size`` selects width of memaddr: 8 or 16 bits
-.. only:: port_wipy
+ Returns the read data.
+ This is only valid in master mode.
- .. method:: i2c.mem_read(data, addr, memaddr, addr_size=8)
-
- Read from the memory of an I2C device:
-
- - ``data`` can be an integer (number of bytes to read) or a buffer to read into
- - ``addr`` is the I2C device address
- - ``memaddr`` is the memory location within the I2C device
- - ``addr_size`` selects width of memaddr: 8 or 16 bits
+.. method:: i2c.mem_write(data, addr, memaddr, timeout=5000, addr_size=8)
- Returns the read data.
- This is only valid in master mode.
+ Write to the memory of an I2C device:
-.. only:: port_pyboard
+ - ``data`` can be an integer or a buffer to write from
+ - ``addr`` is the I2C device address
+ - ``memaddr`` is the memory location within the I2C device
+ - ``timeout`` is the timeout in milliseconds to wait for the write
+ - ``addr_size`` selects width of memaddr: 8 or 16 bits
- .. method:: i2c.mem_write(data, addr, memaddr, timeout=5000, addr_size=8)
-
- Write to the memory of an I2C device:
-
- - ``data`` can be an integer or a buffer to write from
- - ``addr`` is the I2C device address
- - ``memaddr`` is the memory location within the I2C device
- - ``timeout`` is the timeout in milliseconds to wait for the write
- - ``addr_size`` selects width of memaddr: 8 or 16 bits
+ Returns ``None``.
+ This is only valid in master mode.
- Returns ``None``.
- This is only valid in master mode.
+.. method:: i2c.recv(recv, addr=0x00, timeout=5000)
-.. only:: port_wipy
+ Receive data on the bus:
- .. method:: i2c.mem_write(data, addr, memaddr, timeout=5000, addr_size=8)
-
- Write to the memory of an I2C device:
-
- - ``data`` can be an integer or a buffer to write from
- - ``addr`` is the I2C device address
- - ``memaddr`` is the memory location within the I2C device
- - ``addr_size`` selects width of memaddr: 8 or 16 bits
-
- Returns ``None``.
- This is only valid in master mode.
-
-.. only:: port_pyboard
+ - ``recv`` can be an integer, which is the number of bytes to receive,
+ or a mutable buffer, which will be filled with received bytes
+ - ``addr`` is the address to receive from (only required in master mode)
+ - ``timeout`` is the timeout in milliseconds to wait for the receive
- .. method:: i2c.recv(recv, addr=0x00, timeout=5000)
-
- Receive data on the bus:
-
- - ``recv`` can be an integer, which is the number of bytes to receive,
- or a mutable buffer, which will be filled with received bytes
- - ``addr`` is the address to receive from (only required in master mode)
- - ``timeout`` is the timeout in milliseconds to wait for the receive
-
- Return value: if ``recv`` is an integer then a new buffer of the bytes received,
- otherwise the same buffer that was passed in to ``recv``.
-
-.. only:: port_wipy
-
- .. method:: i2c.recv(recv, addr=0x00)
-
- Receive data on the bus:
-
- - ``recv`` can be an integer, which is the number of bytes to receive,
- or a mutable buffer, which will be filled with received bytes
- - ``addr`` is the address to receive from (only required in master mode)
-
- Return value: if ``recv`` is an integer then a new buffer of the bytes received,
- otherwise the same buffer that was passed in to ``recv``.
+ Return value: if ``recv`` is an integer then a new buffer of the bytes received,
+ otherwise the same buffer that was passed in to ``recv``.
.. method:: i2c.scan()
Scan all I2C addresses from 0x01 to 0x7f and return a list of those that respond.
Only valid when in master mode.
-.. only:: port_pyboard
-
- .. method:: i2c.send(send, addr=0x00, timeout=5000)
-
- Send data on the bus:
-
- - ``send`` is the data to send (an integer to send, or a buffer object)
- - ``addr`` is the address to send to (only required in master mode)
- - ``timeout`` is the timeout in milliseconds to wait for the send
-
- Return value: ``None``.
+.. method:: i2c.send(send, addr=0x00, timeout=5000)
-.. only:: port_wipy
+ Send data on the bus:
- .. method:: i2c.send(send, addr=0x00)
-
- Send data on the bus:
-
- - ``send`` is the data to send (an integer to send, or a buffer object)
- - ``addr`` is the address to send to (only required in master mode)
+ - ``send`` is the data to send (an integer to send, or a buffer object)
+ - ``addr`` is the address to send to (only required in master mode)
+ - ``timeout`` is the timeout in milliseconds to wait for the send
- Return value: ``None``.
+ Return value: ``None``.
Constants
---------
diff --git a/docs/library/pyb.SPI.rst b/docs/library/pyb.SPI.rst
index d6f4bb9637..16aa3e20e1 100644
--- a/docs/library/pyb.SPI.rst
+++ b/docs/library/pyb.SPI.rst
@@ -25,7 +25,7 @@ there are 3 lines: SCK, MOSI, MISO.
parameters to init the SPI bus::
from pyb import SPI
- spi = SPI(1, SPI.MASTER, baudrate=600000, polarity=1, phase=0)
+ spi = SPI(1, SPI.MASTER, baudrate=1000000, polarity=0, phase=0, nss=SPI.ACTIVE_LOW)
Only required parameter is mode, must be SPI.MASTER. Polarity can be 0 or
1, and is the level the idle clock line sits at. Phase can be 0 or 1 to
@@ -105,7 +105,7 @@ Methods
.. only:: port_wipy
- .. method:: spi.init(mode, baudrate=328125, \*, polarity=1, phase=0, bits=8, nss=SPI.ACTIVE_LOW)
+ .. method:: spi.init(mode, baudrate=1000000, \*, polarity=0, phase=0, bits=8, nss=SPI.ACTIVE_LOW)
Initialise the SPI bus with the given parameters:
@@ -122,78 +122,37 @@ Methods
Printing the SPI object will show you the computed baudrate and the chosen
prescaler.
-.. only:: port_pyboard
-
- .. method:: spi.recv(recv, \*, timeout=5000)
-
- Receive data on the bus:
-
- - ``recv`` can be an integer, which is the number of bytes to receive,
- or a mutable buffer, which will be filled with received bytes.
- - ``timeout`` is the timeout in milliseconds to wait for the receive.
-
- Return value: if ``recv`` is an integer then a new buffer of the bytes received,
- otherwise the same buffer that was passed in to ``recv``.
+.. method:: spi.recv(recv, \*, timeout=5000)
-.. only:: port_wipy
+ Receive data on the bus:
- .. method:: spi.recv(recv)
-
- Receive data on the bus:
-
- - ``recv`` can be an integer, which is the number of bytes to receive,
- or a mutable buffer, which will be filled with received bytes.
-
- Return value: if ``recv`` is an integer then a new buffer of the bytes received,
- otherwise the same buffer that was passed in to ``recv``.
+ - ``recv`` can be an integer, which is the number of bytes to receive,
+ or a mutable buffer, which will be filled with received bytes.
+ - ``timeout`` is the timeout in milliseconds to wait for the receive.
-.. only:: port_pyboard
+ Return value: if ``recv`` is an integer then a new buffer of the bytes received,
+ otherwise the same buffer that was passed in to ``recv``.
- .. method:: spi.send(send, \*, timeout=5000)
-
- Send data on the bus:
-
- - ``send`` is the data to send (an integer to send, or a buffer object).
- - ``timeout`` is the timeout in milliseconds to wait for the send.
-
- Return value: ``None``.
+.. method:: spi.send(send, \*, timeout=5000)
-.. only:: port_wipy
+ Send data on the bus:
- .. method:: spi.send(send)
-
- Send data on the bus:
-
- - ``send`` is the data to send (an integer to send, or a buffer object).
-
- Return value: ``None``.
+ - ``send`` is the data to send (an integer to send, or a buffer object).
+ - ``timeout`` is the timeout in milliseconds to wait for the send.
-.. only:: port_pyboard
+ Return value: ``None``.
- .. method:: spi.send_recv(send, recv=None, \*, timeout=5000)
-
- Send and receive data on the bus at the same time:
-
- - ``send`` is the data to send (an integer to send, or a buffer object).
- - ``recv`` is a mutable buffer which will be filled with received bytes.
- It can be the same as ``send``, or omitted. If omitted, a new buffer will
- be created.
- - ``timeout`` is the timeout in milliseconds to wait for the receive.
-
- Return value: the buffer with the received bytes.
+.. method:: spi.send_recv(send, recv=None, \*, timeout=5000)
-.. only:: port_wipy
+ Send and receive data on the bus at the same time:
- .. method:: spi.send_recv(send, recv=None)
-
- Send and receive data on the bus at the same time:
-
- - ``send`` is the data to send (an integer to send, or a buffer object).
- - ``recv`` is a mutable buffer which will be filled with received bytes.
- It can be the same as ``send``, or omitted. If omitted, a new buffer will
- be created.
+ - ``send`` is the data to send (an integer to send, or a buffer object).
+ - ``recv`` is a mutable buffer which will be filled with received bytes.
+ It can be the same as ``send``, or omitted. If omitted, a new buffer will
+ be created.
+ - ``timeout`` is the timeout in milliseconds to wait for the receive.
- Return value: the buffer with the received bytes.
+ Return value: the buffer with the received bytes.
Constants
---------
@@ -219,4 +178,4 @@ Constants
.. data:: SPI.ACTIVE_LOW
.. data:: SPI.ACTIVE_HIGH
- decides the polarity of the NSS pin
+ selects the polarity of the NSS pin