1.21.9.3 GPIO_PortWrite Function
C
void GPIO_PortWrite(GPIO_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 to HIGH level.
-
0 - Pin is driven to LOW level.
Precondition
The desired pins lines of the selected port must be setup as output(s)
Parameters
| Param | Description |
|---|---|
| port | One of the IO ports from the enum GPIO_PORT |
| 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. |
| 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.
Returns
None.
Example
// Write binary value 0011 to the pins RC3, RC2, RC1 and RC0 respectively. GPIO_PortWrite(GPIO_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.