How to send data via I2C using DMA
Posted: Sun Mar 15, 2020 6:47 pm
Hello friends,
can someone to help me with configuration of DMA and I2C?
I would like to send the data from blue pill (STM32F103) to the external DAC with I2C interface. I am trying to generate sine wave. Data of one sine period are stored in the array - 512 values. I would like to use it as a circular buffer.
I cannot find any I2C-DMA example. Here I found SPI-DMA example. So I will try to adapt it for I2C.
And here are my questions:
1) Is this possible? I don't know if actual implementation (STM32 Core 1.8.0) is allowing this...
If yes, then next questions.
2) Which libraries/functions need I use for I2C? (seems Wire is not usable. Some low level functions?)
3) Which DMA channel can I use with I2C?
4) Can I use PROGMEM as a data buffer for DMA?
Thanks for any help.
can someone to help me with configuration of DMA and I2C?
I would like to send the data from blue pill (STM32F103) to the external DAC with I2C interface. I am trying to generate sine wave. Data of one sine period are stored in the array - 512 values. I would like to use it as a circular buffer.
I cannot find any I2C-DMA example. Here I found SPI-DMA example. So I will try to adapt it for I2C.
And here are my questions:
1) Is this possible? I don't know if actual implementation (STM32 Core 1.8.0) is allowing this...
If yes, then next questions.
2) Which libraries/functions need I use for I2C? (seems Wire is not usable. Some low level functions?)
3) Which DMA channel can I use with I2C?
4) Can I use PROGMEM as a data buffer for DMA?
Thanks for any help.