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wemosでアセンブラ その2

Posted at

概要

wemos d1でアセンブラやってみた。
Lチカ、やってみた。

サンプルコード

int v = 0;

void led_off(void) {
    asm volatile (
        "movi   a2, 0x60000304;"
        "movi   a3, 0x60000308;"
        "movi   a4, 0x00000004;"
        "s32i   a4, a3, 0;"
        "memw;"
        :
        :
        : "a2", "a3", "a4", "memory"
    );
}
void led_on(void) {
    asm volatile (
        "movi   a2, 0x60000304;"
        "movi   a3, 0x60000308;"
        "movi   a4, 0x00000004;"
        "s32i   a4, a2, 0;"
        "memw;"
        :
        :
        : "a2", "a3", "a4", "memory"
    );
}


void setup() {
    int i;
    Serial.begin(9600);
    while (!Serial)
    {
        ;
    }
    Serial.println("start");
    pinMode(LED_BUILTIN, OUTPUT);
}
void loop() {
    if (v == 0)
    {
        led_off();
        v = 1;
    }
    else
    {
        led_on();
        v = 0;
    }
    delay(800);
}





以上。

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