A related question is a question created from another question. When the related question is created, it will be automatically linked to the original question.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Currently, the TDA4VM is in use(mcu1_0) with the SDK version of TDA4VM_SDK_10.05.
If the I2C address of my chip is 0x74
1,When I want to set P00 to output high level, the command I need to send is Write command: 0x74, 0x06, 0xfe Write command: 0x74, 0x02, 0x01
2,When I want to set P10 as an input, the command I need to send is Write command: 0x74, 0x07, 0x01 3,When the INT changes, the command that needs to be sent is Write command: 0x74, 0x01 Read command: 0x74, read data
Is the format of the sending command I mentioned above correct?
The address has seven bits and is 1110100. The first byte of an I²C transaction contains both the address and the R/W bit, so it must be 0xE9 or 0xE8. (I do not know how that library handles the address.)
You should write the output port register before the configuration register so that the pin does not output the old value for a short time.
When an interrupt happens, you should read both input port registers.
1,When I want to set P00 to output high level, the command I need to send is Write command: 0xE8, 0x02, 0x01 Write command: 0xE8, 0x06, 0xfe
2,When I want to set P10 as an input, the command I need to send is Write command: 0xE8, 0x07, 0x01 3,When the INT changes, the command that needs to be sent is Write command: 0xE8 0x01 Read command: 0xE9, read PORT0,read PORT1
Is the format of the sending command I mentioned above correct?
By the way, When a change occurs at the input port, and the INT port changes from high (H) to low (L), will the INT port change from low (L) to high (H) after I finish reading the data?
if I don't read the value of the input port using the interrupt method, can I use the polling method instead?
The interrupt output gets deactivated when all changed bits have been read.
When this happens, will the INT pin change from low (L) to high (H)? What I mean is that if I use the polling method, I only need to read the register data when the INT is low (L).
