I'm develop a custom board using S3A7 with part# R7FSS3A77C3A01CFB.
I configure pin P306 and pin P313 to be all output mode
Below is how I define the pin
#define PCNTR1_BASE (uint32_t)0x00010000
#define ADG1414_CS PCNTR1_BASE << 6
#define ADC_ADS1258_CS PCNTR1_BASE << 13
if I toggle P313 low using register,
R_IOPORT3->PCNTR1 &= ~ADC_ADS1258_CS_P3
then P306 will be pulled LOW and won't toggle HIGH regardless what method I'm using i.e.
R_IOPORT3->PCNTR1 |= ADG1414_CS
or g_ioport.p_api->pinWrite(IOPORT_PORT_03_PIN_06, IOPORT_LEVEL_HIGH);
However, if I use the method below
to toggle pin P313 low, then P306 won't be effected. What would be the reason? I have tried on few of our boards and they all act the same. I need to use register access so the pin can toggle faster.
if left shift is greater than 8, be sure to cast the type (uint32_t).
#define ADC_ADS1258_CS (uint32_t)(PCNTR1_BASE << 13)
I have a suggestion based on the register description https://www.renesas.com/us/en/document/mah/s3a7-microcontroller-group-users-manual?r=1054611#G24.2215835: "A reserved bit is read as 0. The write value should be 0." And you write '1' to all bits but ADC_ADS1258_CS using this command R_IOPORT3->PCNTR1 &= ~ADC_ADS1258_CS_P3
I recommend you to use the PCNTR3 register (https://www.renesas.com/us/en/document/mah/s3a7-microcontroller-group-users-manual?r=1054611#G24.2202351) to set pins high and low if you want to operate with the registers directly
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