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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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