TAB5 RTC AND TOUCH

[fermintm]

I'm having trouble using the RTC and Touch in the same code. When using the RTC, the Touch stops working, and other times the RTC fails altogether. I think it's due to the wire.begin function, which breaks communication between devices. I'm using the latest M5GFX and M5Unified libraries. There's no example for the internal clock on the board's docs page.

The board has been on the market for months, and fully functional Arduino libraries have yet to be created. Please, before listing modules or cores, also include everything necessary for buyers.

[tobozo]

Hi,

I didn't know there was support for RTC8130 in M5Unified, how did you enable it?

I had to create a custom version in a tab5 project with support for read/writes to RTC RAM.
It's not 100% compatible with M5Unified's RTC API (still needs a couple of methods) but it reuses m5::I2C_Class and doesn't exhibit any conflict as long as RTC and Touch are polled from the same core.

https://github.com/tobozo/M5Tab5-Game-and-Watch/blob/main/gw/m5unified-rtc.hpp

m5::RTC8130_Class Tab5Rtc;
// Tab5Rtc.begin();

[fermintm]

Sorry. I couldn't explain myself. For RTC, I used another library extracted from code for Tab5. The problem is that when using Wire.begin(), the touch stops working. Supposedly, if the internal I2C devices use the same data line, this problem shouldn't arise. I'm still waiting for M5stack to compile all the libraries for this board on Arduino. I don't understand much, and I'm not going to learn ESP-IDF anymore.

[tobozo]

When using m5::In_I2C (the m5::I2C_Class singleton shared with touch), you don't need to use Wire.begin() because M5.begin() already took care of that when init'ing the display and touch.

Moreover, no esp-idf or Arduino Wire functions are required, M5Unified I2C drivers use one of the two m5::I2C_Class abstractions, see the RTC8563_Class where the equivalent of Wire.begin() happens.

Note: RTC8563 is not for Tab5, it only holds some interesting types and functions needed by M5Unified which could benefit additional RTC drivers.

[fermintm]

When using m5::In_I2C (the m5::I2C_Class singleton shared with touch), you don't need to use Wire.begin() because M5.begin() already took care of that when init'ing the display and touch.

Moreover, no esp-idf or Arduino Wire functions are required, M5Unified I2C drivers use one of the two m5::I2C_Class abstractions, see the RTC8563_Class where the equivalent of Wire.begin() happens.

Note: RTC8563 is not for Tab5, it only holds some interesting types and functions needed by M5Unified which could benefit additional RTC drivers.

https://github.com/fermintm/Tab5-DEV-CODE

[tobozo]

v0.2.9 now implements a RTC driver for Tab5 RX8563_Class, the interesting types and functions have been moved into a RTC base class and are now inherited by two RTC drivers.

The Tab5 RTC implementation doesn't have methods to read/write the RTC RAM though, let's hope this eventually gets added.

[fermintm]

v0.2.9 now implements a RTC driver for Tab5 RX8563_Class, the interesting types and functions have been moved into a RTC base class and are now inherited by two RTC drivers.

The Tab5 RTC implementation doesn't have methods to read/write the RTC RAM though, let's hope this eventually gets added.

system crash.

RTC found.
Guru Meditation Error: Core 1 panic'ed (Load access fault). Exception was unhandled.

Core 1 register dump:
MEPC : 0x4fc1b1e4 RA : 0x400511d8 SP : 0x4ff1d910 GP : 0x4ff11300
TP : 0x4ff1df60 T0 : 0x4fc10cc4 T1 : 0x20000000 T2 : 0x00000009
S0/FP : 0x00000000 S1 : 0x00000000 A0 : 0x00000000 A1 : 0xffffffff
A2 : 0x00000004 A3 : 0x7f7f7f7f A4 : 0x00000000 A5 : 0x00000004
A6 : 0xa0000000 A7 : 0x0000000a S2 : 0x40078000 S3 : 0x00000003
S4 : 0xffffffff S5 : 0x00000004 S6 : 0x4ff1da34 S7 : 0x00000073
S8 : 0x00000003 S9 : 0x00000000 S10 : 0x00000003 S11 : 0x00000002
T3 : 0x00000000 T4 : 0xffff01ff T5 : 0x19999999 T6 : 0x00000019
MSTATUS : 0x00011880 MTVEC : 0x4ff00003 MCAUSE : 0x00000005 MTVAL : 0x00000000
MHARTID : 0x00000001

[lovyan03]

Hello, @fermintm
I would like to debug it, so please provide me with the code and build environment information that can reproduce your issue.

[fermintm]

Arduino IDE 2.3.6. Latest M5Unified and M5GFX. Latest M5stack board manager. and RTC example include in m5unified.

[fermintm]

Now works fine!