EA Timers

[Taragorm]

A couple of timer related issues (not sure if I should open two issues here, or not)

1] We don't seem to have an option for using the RTC for millis(). Unclear if this is a deliberate omission, as we obviously have an RTC, and other parts have used this.

2] ioavr64ea32.h [and likely others] don't define TCA1 or TCB3. This is Microchip supplied, I guess, but maybe in need of a patch. I downloaded the latest, but it still seems to be broken. What's the usual way to handle this? Without the #defines you can't use the timers as a millis() source.

[Taragorm]

:(
Even if you patch the header so TCA1 and TCB3 are mapped as per the datasheet, it doesn't seem to work. Almost as if the headers are right and the timers either don't work, or don't exist.

Bit of a problem as I need those timers.

I'm just going to park this unless anyone requests further testing, and redesign around an ATMega4809 part, which fortunately, I can do.

[SpenceKonde]

#define TCA0                  (*(TCA_t *) 0x0A00) /* 16-bit Timer/Counter Type A */
#define TCB0                  (*(TCB_t *) 0x0B00) /* 16-bit Timer Type B */
#define TCB1                  (*(TCB_t *) 0x0B10) /* 16-bit Timer Type B */
#define TCB2                  (*(TCB_t *) 0x0B20) /* 16-bit Timer Type B */
#define SYSCFG             (*(SYSCFG_t *) 0x0F00) /* System Configuration Registers */
#define NVMCTRL           (*(NVMCTRL_t *) 0x1000) /* Non-volatile Memory Controller */
#define LOCK                 (*(LOCK_t *) 0x1040) /* Lockbits */
#define FUSE                 (*(FUSE_t *) 0x1050) /* Fuses */
#define USERROW           (*(USERROW_t *) 0x1080) /* User Row */
#define SIGROW             (*(SIGROW_t *) 0x1100) /* Signature row */

vs

#define TWI0                  (*(TWI_t *) 0x0900) /* Two-Wire Interface */
#define SPI0                  (*(SPI_t *) 0x0940) /* Serial Peripheral Interface */
#define TCA0                  (*(TCA_t *) 0x0A00) /* 16-bit Timer/Counter Type A */
#define TCA1                  (*(TCA_t *) 0x0A40) /* 16-bit Timer/Counter Type A */
#define TCB0                  (*(TCB_t *) 0x0B00) /* 16-bit Timer Type B */
#define TCB1                  (*(TCB_t *) 0x0B10) /* 16-bit Timer Type B */
#define TCB2                  (*(TCB_t *) 0x0B20) /* 16-bit Timer Type B */
#define TCB3                  (*(TCB_t *) 0x0B30) /* 16-bit Timer Type B */

OOOFFF!!! did they cut the TCA1 and TCBs? If so, that was omne of the most appea;omg things about them.