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diff --git a/docs/research.adoc b/docs/research.adoc index 88e43a7..80e32f2 100644 --- a/docs/research.adoc +++ b/docs/research.adoc @@ -404,7 +404,54 @@ non-experimental version of {cpp}. === Research question -How can we use I^2^C for the puzzle module detection? +How can we use I^2^C for the puzzle module detection and communication? + +=== Puzzle Module and Main Controller Communication + +Research from project group 21/22 shows that the I^2^C protocol is the best +option for communication between the puzzle modules and the main controller. +This research section extends the previous section about which MCU is suitable +for the puzzle bus, as we have found vital I^2^C limitations with the +controller we had chosen. See the handover document for the found limitations. + +// TODO: REFERENCES + +==== PIC16F15276 + +The PIC16F15276 MCU shows possibilities to be addressable as a slave while +being in master mode. However, this can not be confirmed without physical +testing due to the datasheet not mentioning whether it can or can not support +this function. It is possible to use this MCU without the aforementioned +functionality by manually changing the RCEN register to manually set the +MCU to 'receiving' I^2^C instructions, however this also requires a degree of +testing. + +// TODO: Add the following reference: +// PIC16F15276 - 25.2.4.3 +// https://ww1.microchip.com/downloads/aemDocuments/documents/MCU08/ProductDocuments/DataSheets/PIC16F15256-74-75-76-Microcontroller-Data-Sheet-40002305.pdf + +==== ESP32 + +The ESP32, like the PIC16F15276, shows possibilities to be addressable as a +slave while being in master mode, this also requires testing however. In the +case of the ESP32 it is possible to use the two I^2^C peripherals to achieve +roughly the same goal. This can be done by having one of the two peripherals +be initiated in master mode while the other peripheral is initiated in slave +mode. Allowing the MCU to send and recieve data to the I^2^C bus. This does +introduce increased code complexity but is a valid option if it goes through +testing. + +// TODO: Add the following reference: +// https://docs.espressif.com/projects/esp-idf/en/v4.3/esp32/api-reference/peripherals/i2c.html +// https://www.espressif.com/sites/default/files/documentation/esp32_technical_reference_manual_en.pdf#i2c +// https://www.bitsandparts.nl/documentation/482/ESP32_Specifications_EN_v1.pdf + +==== RP2040 + +As written in the handover document, the RP2040 does not support being +addressed as a slave while being in master mode. It does however, just like +the ESP32 have two I^2^C peripherals. Meaning the same theory can be applied +on this MCU. === Puzzle Module Detection @@ -448,10 +495,6 @@ answer this handshake and is therefor not recognized as a puzzle module. // TODO: references (API) & code block naming? -=== Welke microcontroller famillies zijn slave addresseerbaar while in master die ook multimaster vriendelijk zijn. - -=== multi master == standaard? - == Original Puzzle Box Functionality Research (Thomas) === Research question |