ADC1 module and AD1EVT as GIO

Enrico,

The ADC_EVT pin can be used has GIO pin. All control register are available to control the direction, In, Out, Set, Clear.

Unfortunately, the Halcogen GIO driver cannot be used on ADC_EVT because of a swap in 2 registers.

Here is the definition and register order for ADC_EVT

uint32 EVTDIR;  /**< 0x00FC: Event pin direction register */
uint32 EVTOUT;  /**< 0x0100: Event pin digital output register */
uint32 EVTIN;   /**< 0x0104: Event pin digital input register */
uint32 EVTSET;  /**< 0x0108: Event pin set register */
uint32 EVTCLR;  /**< 0x010C: Event pin clear register */
uint32 EVTPDR;  /**< 0x0110: Event pin open drain register */
uint32 EVTDIS;  /**< 0x0114: Event pin pull disable register */
uint32 EVTPSEL; /**< 0x0118: Event pin pull select register */

Here is the definition of the GIO_Port used in all GIO function:

typedef volatile struct gioPort
{
uint32 DIR;    /**< 0x0000: Data Direction Register */
uint32 DIN;    /**< 0x0004: Data Input Register */
uint32 DOUT;   /**< 0x0008: Data Output Register */
uint32 DSET;   /**< 0x000C: Data Output Set Register */
uint32 DCLR;   /**< 0x0010: Data Output Clear Register */
uint32 PDR;    /**< 0x0014: Open Drain Register */
uint32 PULDIS; /**< 0x0018: Pullup Disable Register */
uint32 PSL;    /**< 0x001C: Pull Up/Down Selection Register */
} gioPORT_t;

If you don't use the direct In and Out Register, than you can still use the GIO driver to control the ADC_EVT.

You will have to add a definition like:

#define gioADC1_EVT ((gioPORT_t *)0x0xFFF7C100U)
#define gioADC2_EVT ((gioPORT_t *)0x0xFFF7C300U)

Another option is to define a new gioPORT_t structure that will be only used for ADV_EVT. Just swap in the structure definition the DIN and DOUT register and use this new structure to define your gioADC1_EVT and gioADC2_EVT.

Have a try and let me know.

Hi Jean-March,

Are you sure? I'm using Halcogen 3.6.0.

In the Techincal Reference Manual SPNU515, the ADC control registers for ADC_EVT pin are:

- FCh ADEVTDIR ADC ADEVT Pin Direction Control Register

- 100h ADEVTOUT ADC ADEVT Pin Output Value Control Register

- 104h ADEVTIN ADC ADEVT Pin Input Value Register

and in Halcogen 3.6.0, the ADC control registers are defined as following:

- uint32 EVTDIR; /**< 0x00FC: Event pin direction register */

- uint32 EVTOUT; /**< 0x0100: Event pin digital output register */

- uint32 EVTIN; /**< 0x0104: Event pin digital input register

I noticed that:

A) If I inizialize the ADC_EVT pin ( adcREG1->EVTPDR = 0; adcREG1->EVTSET = 0; adcREG1->EVTDIR = 1; ) before the ADC initialization (init. of Halcogen), the ADC_EVT pin does't work.

B) If I inizialize the ADC_EVT pin after the ADC initialization, the ADC_EVT pin works.

Why?

Regards

Enrico