Lup Yuen Lee 李立源 @lupyuen@qoto.org

#BL602 SPI DMA uses simple Interrupt Handlers .... Simpler than I2C! Let's experiment with SPI DMA on BME280

https://github.com/lupyuen/bl_iot_sdk/blob/spi/components/hal_drv/bl602_hal/hal_spi.c#L749-L794

#BL602 SPI DMA ... Lets you specify a Linked List of Transmit / Receive operations ... That will be executed by the DMA Controller

https://github.com/lupyuen/bl_iot_sdk/blob/master/components/hal_drv/bl602_hal/hal_spi.c#L115

We'll let #BL602 talk simple SPI to BME280 first ... Before talking seriously to ST7789

https://cdn.sparkfun.com/assets/learn_tutorials/4/1/9/BST-BME280_DS001-10.pdf

Yep #BL602 SPI is copy pasta from I2C ... Even the Register Address. Very nice! 👍

https://github.com/bouffalolab/bl_docs/tree/main/BL602_RM/en

#BL602 SPI Register Fields look similar to I2C too

https://github.com/bouffalolab/bl_docs/tree/main/BL602_RM/en

#BL602 SPI Registers are remarkably similar to I2C Registers ... So I can reuse my I2C code for SPI 🤔

https://github.com/bouffalolab/bl_docs/tree/main/BL602_RM/en

Raspberry Pi Pico also uses the old SPI terms

https://raspberrypi.github.io/pico-sdk-doxygen/group__hardware__spi.html#ga127e4bf0fc1d7d271d2e9160c6e3b722

...Wait it's still using the old terms. Should be renamed as "Controller" and "Peripheral", according to the guidelines:

https://www.oshwa.org/a-resolution-to-redefine-spi-signal-names/

#BL602 uses the new SPI Pin Names ... No more MOSI and MISO 👍

https://github.com/bouffalolab/bl_docs/tree/main/BL602_RM/en

...Aha it's a Copy-Paste Bug

https://github.com/bouffalolab/bl_docs/tree/main/BL602_RM/en

#BL602 SPI ... Uses UART for DMA? 🤔

https://github.com/bouffalolab/bl_docs/tree/main/BL602_RM/en

Now studying #BL602 SPI ... Can't wait to get #PineCone driving ST7789 with #LVGL!

https://github.com/bouffalolab/bl_docs/tree/main/BL602_RM/en

Looks super familiar ... Hello ST7789, #PineTime and #PineCone!

#BL602 + #LoRa ... Would it be useful for creating a WiFi Gateway for LoRa? 🤔

Received the Lunar New Year Goodies ... Let's hack them with #BL602 #RISCV!

#BL602 Next Steps ... Come help us make #RISCV better! 🙏 👍 😀

https://lupyuen.github.io/articles/i2c#whats-next

Running the #BL602 I2C Firmware and reading the BME280 Sensor ... On #PineCone @PINE64

https://lupyuen.github.io/articles/i2c#enter-i2c-commands

"Complicated Family Tree Guide"

https://www.reddit.com/r/singapore/comments/l6lhsb/cny_cheat_sheet_for_family_members_credit_to_the/?utm_medium=android_app&utm_source=share

How we build the #BL602 I2C Firmware

https://lupyuen.github.io/articles/i2c#build-and-run-the-firmware

How to troubleshoot #RISCV Exceptions ... On #PineCone #BL602 @PINE64

https://lupyuen.github.io/articles/i2c#appendix-how-to-troubleshoot-risc-v-exceptions