Method write

effect_delay_ext.cpp:205–252

}

void AudioEffectDelayExternal::write(uint32_t offset, uint32_t count, const int16_t *data)
{
	uint32_t addr = memory_begin + offset;

#ifdef INTERNAL_TEST
	while (count) { testmem[addr++] = *data++; count--; } // testing only
#else
	if (memory_type == AUDIO_MEMORY_23LC1024) {
		addr *= 2;
		SPI.beginTransaction(SPISETTING);
		digitalWriteFast(SPIRAM_CS_PIN, LOW);
		SPI.transfer16((0x02 << 8) | (addr >> 16));
		SPI.transfer16(addr & 0xFFFF);
		while (count) {
			int16_t w = 0;
			if (data) w = *data++;
			SPI.transfer16(w);
			count--;
		}
		digitalWriteFast(SPIRAM_CS_PIN, HIGH);
		SPI.endTransaction();
	} else if (memory_type == AUDIO_MEMORY_MEMORYBOARD) {
		SPI.beginTransaction(SPISETTING);
		while (count) {
			uint32_t chip = (addr >> 16) + 1;
			digitalWriteFast(MEMBOARD_CS0_PIN, chip & 1);
			digitalWriteFast(MEMBOARD_CS1_PIN, chip & 2);
			digitalWriteFast(MEMBOARD_CS2_PIN, chip & 4);
			uint32_t chipaddr = (addr & 0xFFFF) << 1;
			SPI.transfer16((0x02 << 8) | (chipaddr >> 16));
			SPI.transfer16(chipaddr & 0xFFFF);
			uint32_t num = 0x10000 - (addr & 0xFFFF);
			if (num > count) num = count;
			count -= num;
			addr += num;
			do {
				int16_t w = 0;
				if (data) w = *data++;
				SPI.transfer16(w);
			} while (--num > 0);
		}
		digitalWriteFast(MEMBOARD_CS0_PIN, LOW);
		digitalWriteFast(MEMBOARD_CS1_PIN, LOW);
		digitalWriteFast(MEMBOARD_CS2_PIN, LOW);
		SPI.endTransaction();
	}
#endif
}