Microcontrollers-nxp
From Wiki at Neela Nurseries
parent topic Microcontrollers
^ Overview
^ Technologies and Features
2022
-
0721
- http://www.nxp.com/docs/en/application-note/AN2708.pdf intro to External Bus Interface EBI
^ Specific MCUs
2022
-
0721
^ To Sort
Microcontrollers de NXP, starting with a NXP's Line Card:
2021-07-08
And an article at Wikipedia:
How to program dual-core microcontrollers:
Not sure how useful this code example will be, it is posted in or around 2014. Hard to read on the NXP forum due to some funky formatting:
;/* File: example.s */ .syntax unified /* this makes the assembler automatically generate IT instructions for you */ .cpu cortex-m0 /* this selects the cortex-m0 architecture and helps you avoid using cortex-m3/cortex-m4 instructions */ .text /* this makes sure the code goes into the .text section */ .global m0vectors .word 0x20004000 /* this defines the initial stack pointer for the Cortex-M0 */ .word m0reset /* the reset exception vector */ /* here you should place your other exception vectors. There are too many to include in this example */ .global m0test /* this exports the symbol m0test, so you can reference it from for instance C */ .func m0test,m0test /* this names the symbol m0test as a function (for the debug-info) */ .type m0test,%function /* this tells the assembler (and linker) what kind of symbol we're generating */ .thumb_func /* this is necessary if pointers use the symbol */ .align /* this makes sure the code is positioned on a 16-bit boundary */ m0test: /* this defines the actual symbol */ ldr r0,=0x01234567 /* example code, load a value into r0 */ bx lr /* return to the calling function */ m0reset: bl m0test /* this is the startup-code, call our function */ lockup: wfi /* sleep the CPU; it'll wake up if an interrupt occurs */ b lockup /* go back to sleep */ .size m0test, . - m0test /* this tells the linker how big this function is, so it can correctly exclude it if it's unused */ .endfunc /* this marks the end of the function (for the debug-info) */ You can then refer to the code from your C file... /* File: main.c */ #include <ipc_queue.h> /* Note: you don't need argc and argv on a microcontroller. */ int main(int argc, const char *argv[]) { IPC_haltSlave(); SET_SLAVE_SHADOWREG(m0vectors); IPC_startSlave(); while(1) { asm volatile("wfi"); } return(0); } <!-- comentario -->