微處理器 - Allwinner F133-A (MangoPi MQ-R) - Assembly - LED

參考資料：
https://github.com/steward-fu/pdf/blob/master/f133/rm.pdf

LED是連接到PWM7


PWM7是PD22


GPIO位址


PD_CFG2


PD_DAT


main.s

    .global _start
 
    .equ GPIO_BASE, 0x02000000
    .equ PD_CFG2,   0x0098
    .equ PD_DAT,    0x00a0
  
    .text
    .long 0x0a00006f
    .byte 'e','G','O','N','.','B','T','0'
    .long 0x5F0A6C39
    .long 0x8000
    .long 0, 0
    .long 0, 0, 0, 0, 0, 0, 0, 0
    .long 0, 0, 0, 0, 0, 0, 0, 0

    .org 0x00a0
_vector:
    j _start
  
    .org 0x0100
_start:
    li t0, (1 << 24)
    li a0, GPIO_BASE + PD_CFG2
    sw t0, 0(a0)

    li t1, (1 << 22)
0:
    xor t0, t0, t1
    li a0, GPIO_BASE + PD_DAT
    sw t0, 0(a0)
 
    lui t2, 10000
1:
    nop
    addi t2, t2, -1
    bgtz t2, 1b
    j 0b
    .end

main.ld

MEMORY {
    FLASH : ORIGIN = 0, LENGTH = 32M
}

SECTIONS {
    .text : { *(.text*) } > FLASH
    .rodata : { *(.rodata*) } > FLASH
    .bss : { *(.bss*) } > FLASH
}

Makefile

all:
	riscv64-unknown-linux-gnu-as -o main.o main.s
	riscv64-unknown-linux-gnu-ld -T main.ld -o main.elf main.o
	riscv64-unknown-linux-gnu-objcopy -O binary main.elf tmp.bin
	python3 gen_checksum.py tmp.bin main.bin

run:
	xfel ddr f133 && xfel write 0x40000000 main.bin && xfel exec 0x40000000

clean:
	rm -rf main.bin main.o main.elf tmp.bin

編譯

$ make
    riscv64-unknown-linux-gnu-as -o main.o main.s
    riscv64-unknown-linux-gnu-ld -T main.ld -o main.elf main.o
    riscv64-unknown-linux-gnu-objcopy -O binary main.elf tmp.bin
    python3 gen_checksum.py tmp.bin main.bin

執行

$ make run
    xfel ddr f133 && xfel write 0x40000000 main.bin && xfel exec 0x40000000
    Initial ddr controller succeeded
    100% [================================================] 16.000 KB, 431.932 KB/s

完成