spislave - SPI From machine#
Adapted Air601 Air101/Air103
Note
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Tip
This library has its own demo,click this link to view spislave demo examples
Example
-- Please consult demo
-- Currently only supported by the XT804 series, such Air101/Air103/Air601
spislave.setup(id, opts)#
Initialize SPI Slave
Parameters
Incoming Value Type |
Explanation |
|---|---|
int |
Slave SPI number, note the difference with SPI host number, this is related to specific equipment |
table |
opts Extended configuration parameters, currently no parameters |
Return Value
return value type |
explanation |
|---|---|
boolean |
true Indicates success, other failures |
Examples
-- Currently only supported by the XT804 series, such Air101/Air103/Air601/Air690
-- Air101 For example, initialize SPI slave, number 2, SPI mode
spislave.setup(2)
-- Air101 For example, initialize SPI slave, number 3, SDIO mode
spislavve.setup(3)
spislave.ready(id)#
Whether writable
Parameters
Incoming Value Type |
Explanation |
|---|---|
int |
Number of Slave SPI |
Return Value
return value type |
explanation |
|---|---|
boolean |
true Indicates writable, others not writable |
Examples
None
spislave.on(id, cb)#
Register event callback function
Parameters
Incoming Value Type |
Explanation |
|---|---|
int |
Number of Slave SPI |
function |
callback function |
Return Value
None
Examples
None
spislave.read(id, ptr, buff, len)#
Read data
Parameters
Incoming Value Type |
Explanation |
|---|---|
int |
Number of Slave SPI |
userdata |
User data pointer, obtained from the callback function |
int |
zbuff buffer object |
int |
Read length, obtained from the callback function |
Return Value
return value type |
explanation |
|---|---|
int |
The number of bytes read, usually the same length as the expected read |
int |
Error code, returned only when an error occurs |
Examples
None
spislave.write(id, ptr, buff, len)#
Write Data
Parameters
Incoming Value Type |
Explanation |
|---|---|
int |
Number of Slave SPI |
userdata |
User data pointer, currently passing nil |
int |
zbuff buffer object |
int |
Write length, note that the hardware limit cannot be exceeded, usually 1500 bytes |
Return Value
return value type |
explanation |
|---|---|
boolean |
true Indicates success, other failures |
int |
Error code, returned only when an error occurs |
Examples
None