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Added a HW section to the project's README.md (#6)

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Added a HW section to the project's README.md, with additional links to original chip manufacturer and a comparison with ESP8266
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Pooya Moradi 2020-10-29 01:50:25 +03:30 committed by GitHub
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@ -6,3 +6,76 @@ Bouffalolab bl_iot_sdk. Support BL602 Wi-Fi/BLE Combo RISC-V based Chip.
Check ``docs/html`` for more detail.
Fire an issue, if you have any issue or need any support.
Hardware
=========
BL602 is a 32-bit RISC-V based combo chipset supporting Wi-Fi and BLE (Bluetooth Low Energy). The chip is made by `Nanjing-based Bouffalo Lab <https://www.bouffalolab.com/bl602>`_ for ultra-low-power applications.
In terms of price range and feature set, the chip is competing against `Espressif ESP8266 <https://www.espressif.com/en/products/socs/esp8266>`_
Comparison with ESP8266
=======================
+-------------------+-----------------------------+----------------------------------+
| | Bouffalo Lab BL602 | Espressif ESP8266 |
+===================+=============================+==================================+
| Architecture | 32-bit RISC-V | 32-bit Xtensa |
| | | |
| | @192MHz (dynamic @1-192MHz) | @80MHz (and 160MHz) |
| | | |
| | L1 cache | |
| | | |
| | FPU | |
+-------------------+-----------------------------+----------------------------------+
| Memory | 276KB SRAM | 32 KiB instruction RAM |
| | | |
| | 128KB ROM | 32 KiB instruction cache RAM |
| | | |
| | 1 Kb eFuse | 80 KiB user-data RAM |
| | | |
| | optional embdedded flash | 16 KiB ETS system-data RAM |
| | | |
| | | |
| | XIP QSPI flash support | No programmable ROM |
| | | |
| | | QSPI flash support |
| | | (up to 16 MB) |
+-------------------+-----------------------------+----------------------------------+
| Wi-Fi | 802.11 b/g/n @2.4GHz | 802.11 b/g/n @2.4GHz |
| | | |
| | WPS/WEP/WPA/WPA2/WPA3 | WEP/WPA/WPA2 |
+-------------------+-----------------------------+----------------------------------+
| Bluetooth | LE 5.0 | NONE |
+-------------------+-----------------------------+----------------------------------+
| GPIO | x16 | x16 |
+-------------------+-----------------------------+----------------------------------+
| SDIO | x1 2.0 slave | x1 v2.0 slave |
+-------------------+-----------------------------+----------------------------------+
| SPI | x1 | x2 |
+-------------------+-----------------------------+----------------------------------+
| UART | x2 | x1.5 |
| | | (One Tx only) |
+-------------------+-----------------------------+----------------------------------+
| I2C | x1 | x1 (software implemented) |
+-------------------+-----------------------------+----------------------------------+
| I2S | NONE | x1 (with DMA) |
+-------------------+-----------------------------+----------------------------------+
| PWM channels | x5 | x4 |
+-------------------+-----------------------------+----------------------------------+
| ADC | 12-bit | 10-bit (SAR) |
+-------------------+-----------------------------+----------------------------------+
| DAC | 10-bit | NONE |
+-------------------+-----------------------------+----------------------------------+
| Analog Comparator | x2 | NONE |
+-------------------+-----------------------------+----------------------------------+
| DMA | x4 | with I2S |
+-------------------+-----------------------------+----------------------------------+
| Timer | RTC (up to 1 year) | x1 hardware |
| | | |
| | x2 32-bit general-purpose | x1 software |
| | | |
| | | (no interrupt gen. on sw. timer) |
+-------------------+-----------------------------+----------------------------------+
| IR Remote Control | x1 | x1 |
+-------------------+-----------------------------+----------------------------------+
| Debug | JTAG support | ? |
+-------------------+-----------------------------+----------------------------------+