Hi,
I'm using the CY8C21534 and need to switch bleed resistor between P1[1] and P1[4]. I followed the application note CE66058 and came to the routines:
void Connect_Rb_to_P1_4(void)
{
/*Disconnect P1[1] from Global Out buses*/
PRT1GS &= ~0x02;
/*Change the drive mode to High Z Analog*/
PRT1DM0 &= ~0x02;
/*Disable the comparator connection to GOO1*/
CMP_GO_EN &= ~0x40;
/* Change Analog LUT Control Register 0 */
ALT_CR0 &= ~0xc5;
ALT_CR0 |= 0x0c;
/*Enable the comparator connection to GOO4*/
CMP_GO_EN |= 0x08;
/*Change the drive mode of the pin to open drain low*/
PRT1DM0 |= 0x10;
/*Connect P1[4] to Global out bus*/
PRT1GS |= 0x10;
}
void Connect_Rb_to_P1_1(void)
{
/* Disconnect P1[4] from Global Out buses */
PRT1GS &= ~0x10;
/* Change the drive mode to High Z Analog */
PRT1DM0 &= ~0x10;
/* Disable the comparator connection to GOO4 */
CMP_GO_EN &= ~0x08;
/* Change Analog LUT Control Register 0 */
ALT_CR0 &= ~0x0c;
ALT_CR0 |= 0xc5;
/* Enable the comparator connection to GOO1 */
CMP_GO_EN |= 0x40;
/* Change the drive mode of the pin to open drain low */
PRT1DM0 |= 0x02;
/* Connect P1[1] to Global out bus */
PRT1GS |= 0x02;
}
But it doesn't seem to work. Can it be that I need to change some other registers also?
Thanks.
