Hi @RuGl_1600761,
To achieve this, you need to write the registers of the GPIO manually for it to behave as a software controlled GPIO. You need to set the HSIOM so that the functionality is firmware controlled GPIO, set the drive modes and write the data registers for output/read the PS register for input.
The following code toggles between UART and normal GPIO functionality on pin P3.0 and P3.1 -
if(mode == 0)
{
/* Write the HSIOM for UART functinality */
val = CY_GET_REG32(CYREG_HSIOM_PORT_SEL3);
val = val | 0x00000099;
CY_SET_REG32(CYREG_HSIOM_PORT_SEL3, val);
/* Set the drive mode */
val = CY_GET_REG32(CYREG_GPIO_PRT3_PC);
val = val | 0x01;
val = val & 0xFFFFFFFE;
CY_SET_REG32(CYREG_GPIO_PRT3_PC, val);
UART_Start();
UART_SpiUartPutArray("Hello", 6);
CyDelay(100);
}
if(mode == 1)
{
UART_Stop();
/* Write the HSIOM for software controlled GPIO functinality */
val = CY_GET_REG32(CYREG_HSIOM_PORT_SEL3);
val = val &0xFFFFFF00;
CY_SET_REG32(CYREG_HSIOM_PORT_SEL3, val);
/* Set the drive mode */
val = CY_GET_REG32(CYREG_GPIO_PRT3_PC);
val = val | 0x3F;
val = val & 0xFFFFFFF6;
CY_SET_REG32(CYREG_GPIO_PRT3_PC, val);
/*Write the data register for toggling the pin */
val = CY_GET_REG32(CYREG_GPIO_PRT3_DR);
val = val |0x03;
CY_SET_REG32(CYREG_GPIO_PRT3_DR, val);
CyDelay(500);
/*Write the data register for toggling the pin */
val = CY_GET_REG32(CYREG_GPIO_PRT3_DR);
val = val & 0xFC;
CY_SET_REG32(CYREG_GPIO_PRT3_DR, val);
CyDelay(500);
}
Best regards,
Hari
