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Functional Overview
PSP
Example Code:
while(psp_output_full());
psp_data=command;
while(!input_buffer_full());
if (psp_overflow())
error=true
else
data=psp_data;
Returns 1 if the device has PSP
//waits till the output buffer is cleared
//writes to the port
//waits till input buffer is cleared
//if there is an overflow set the error flag
//if there is no overflow then read the port
QEI
The Quadrature Encoder Interface (QEI) module provides the interface to incremental encoders
for obtaining mechanical positional data.
Relevant Functions:
setup_qei(options, filter,maxcount)
qei_status( )
qei_set_count(value)
qei_get_count( )
Relevant Preprocessor:
None
Relevant Interrupts :
#INT_QEI
Relevant Include Files:
None, all functions built-in
Relevant getenv() parameters:
None
Example Code:
int16 Value;
setup_qei(QEI_MODE_X2 |
Configures the QEI module.
Returns the status of the QUI module.
Write a 16-bit value to the position counter.
Reads the current 16-bit value of the position counter.
Interrupt on rollover or underflow of the position counter.
Setup the QEI module
QEI_TIMER_INTERNAL,
51
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