Hello
I got to make a working sensor on MSP430G2553 and NRF24L01+
Perhaps it will be interesting to someone else.
It compiles in Code Composer Studio V8.
MySensors v2.3.1 library changed to work on MSP430G2553 microcontroller
with NRF24L01+ as transport.
-NODE - work, takes 8Kb out of 16Kb flash and 232 byte out of 512 RAM
- Gateway Serial - not tested, in the process. (In earlier versions it worked, but there were many changes later that could affect.)
now i use Orange Pi + NRF24 as gateway. - Repeater mode not tested.
NRF24: MOSI - P1.7 MISO - P1.6 CLK -P1.5 CSN - P2.4 CE - P2.3 IRQ - P2.5 defined in nrf_userconfig.h
debug output to soft_serial (bitbang) TX-2.0 RX-2.1 (115200)
serial GW RX-P1.1 TX-P1.2 (115200)
-
node.cpp - user program which is similar to arduino project.
-
some useful defines for MyConfig.h i define in MyConfigAddon.h
-
work on 16Mhz
-
IRQ of RF24 now work. (implemented on Port 2)
-
launchpad button on on P1.3 work with interrupt.
-
HW UART and SPI uses interrupt and Low power mode 0 (LPM0) to sended/receive data.
-
Watchdog disabled.
-
hwSleep use LPM0 and watchdog timer interrupt to wake
-
hwCPUVoltage - implemeted, not tested.
-
hwMillis use TIMER0_A0 interrupt.
-
Circular buffer - work.
MY_RX_MESSAGE_BUFFER_SIZE value MUST be power of two (2,4,8...256).
this is due to optimization (mod % changed to using bit mask)
mask for index which prevents overflow. if size=4 what corresponds to b0100 then mask=size-1 = 3 what corresponds to b0011
so if Index greater than 3 (size=4 and idx values= 0,1,2,3) and if apply a mask, the index will never be exceeded. -> 5 & 3 = 1 (b0101 & b0011 = b0001) -
RF24_DEBUG() outputs to debug UART the name of the function in which it is lunched in addition to predefined debug messages of MySensors.
-
serial debug messages may be highlighted in colors.
example - ("Start demo sensor, press " GRN "SW1." RST "\r\n") - prints "SW1" in green color. -
MyMessage::getString improved to use less memory
not work:
- EEPROM - cant save config
- Encription
- LEDs - not tested.
- interrupt callback in sleep/wait function.
- OTA Firmware/ Logging
- Signing
