Ameba MicroPython: [RTL8722CSM] [RTL8722DM] SPI

API Documents
Constructors
SPI(unit_id [required], baudrate [optional], polarity [optional], phase [optional], databits [optional], firstbit [optional], miso [optional], mosi [optional], sck [optional], mode [optional])
Create a SPI object and configure it using other parameters. This allows you to then read/write data on the SPI bus.
• unit_id: The unit ID of the hardware SPI, assume default value if left blank
• baudrate: The speed of SPI
• polarity: one of factor determining SPI mode. (deprecated)
• phase: one of factor determining SPI mode. (deprecated)
• databits: number of data bits
• Firstbit: this determine whether first bit is MSB or LSB
• miso: miso pin. (deprecated)
• mosi: mosi pin. (deprecated)
• sck: clock pin. (deprecated)
• mode: either MASTER mode or SLAVE mode
Note: All optional parameters have default values as follows,
 
Parameter Default
Baudrate
2000000 Hz
Polarity
Inactive_low
Phase
Toggle_middle
Databits
8
Firstbit
MSB
Miso
N.A.
Mosi
N.A.
Sck
N.A.
Mode
MASTER
There is currently 2 set of SPI, they are,
unit MOSI MISO SCK CS
0
PB_18
PB_19
PB_20
PB_21
1
PB_4
PB_5
PB_6
PB_7
Note: both unit support master mode, but only unit 0 supports slave mode.
 
Methods
SPI.read()
This method waits and read data received in SPI buffer, then return the data received. Works in both master and slave mode.
 
SPI.write( value [required])
This method writes an integer value to SPI bus. Works in both master and slave mode.
• value: an integer value to be sent on SPI bus
 
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Please confirm that QQ communication software is installed