1.26.9.3 PIO_PortWrite Function

C 

void PIO_PortWrite(PIO_PORT port, uint32_t mask, uint32_t value);

Summary

Write the value on the masked I/O lines of the selected port.

Description

This function writes the data values driven on selected output lines of the selected port. Bit values in each position indicate corresponding pin levels.

  • 1 - Pin is driven high.

  • 0 - Pin is driven low.

Precondition

The desired pins lines of the selected port must be setup as output(s) in MHC Pin Manager. PIO_Initialize() must have been called.

Parameters

Param Description
port One of the IO ports from the enum PIO_PORT
mask A 32 bit value in which positions of 0s and 1s decide which IO pins of the selected port will be written.

  • 1's Will write to corresponding IO pins.

  • 0's Will remain unchanged. | | value | Value which has to be written/driven on the I/O lines of the selected port for which mask bits are '1'. Values for the corresponding mask bit '0' will be ignored.

Returns

None.

Example 

// Write binary value 0011 to the pins PC3, PC2, PC1 and PC0 respectively.
PIO_PortWrite(PIO_PORT_C, 0x0F, 0xF563D453);

Remarks

If the port has less than 32-bits, unimplemented pins will be ignored. Implemented pins are Right aligned in the 32-bit value.