Hello!
I want to use the CAL_I2C component macro with a PIC24FJ256GA702 microcontroller.
In the Properties window, the SCA and SCL pins point to non-existent port.
If I change the I2C channel, the SCA and SCL port pins do not change.
PIC24FJ256GA702_I2C_CAL_CH1.jpg (58.91 KiB) Viewed 167 times
PIC24FJ256GA702_I2C_CAL_CH2.jpg (59.26 KiB) Viewed 167 times
Thank you very much!
I didn't know about this option.
After setting the port pins I tried the CAL_I2C Macro. I found that the "Transaction_Initialise" command rotates the address value one place to the left. For example, if the address of the I2C device is 0x78, I have to enter 0x3C in the command to make it work properly.
Hopefully the pins can be marked as changeable in the component.
The address is shifted left one bit when sent - bit 0 is then read/write (1/0). transaction initialise should take the unshifted address value - the address is 7bit and it's entered as bits 6..0 but sent as bits 7..1
Confusingly - addresses might be stated in either eight or seven bit form!
I was trying out an SSD1305 Display module with an I2C interface when I experienced this.
I used the SSD1306 Component Macro commands, but I overwrote the Display Initialization datas and used the CAL_I2C macro for this.
When I set 0x78 as the address in the "Transaction_Initialise" command, it sent the data to address 0xF0 and of course it didn't work.
When I set 0x3C, it sent the initialization data to address 0x78 and the display worked fine.
I have attached the test project.
