1.21.9.6 GPIO_PortClear Function

C

void GPIO_PortClear(GPIO_PORT port, uint32_t mask)

Summary

Clear the selected IO pins of a port.

Description

This function clears (to '0') the selected IO pins of a port.

Precondition

Pins of the port must be made output before clearing.

Parameters

Param Description
port One of the IO ports from the enum GPIO_PORT
mask A 32 bit value in which positions of 0s and 1s decide which IO pins of the selected port will be cleared.
  • 1's Will clear corresponding IO pins to low (to 0).

  • 0's Will remain unchanged.

Returns

None.

Example

// Clear RC5 and RC7 pins to 0
GPIO_PortClear(GPIO_PORT_C, 0x00A0);

Remarks

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