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https://opencores.org/ocsvn/mips32r1/mips32r1/trunk
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[/] [mips32r1/] [trunk/] [Software/] [demos/] [XD4_UART/] [src/] [drivers/] [piezo.c] - Rev 2
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#include "piezo.h" void Piezo_set(uint32_t count, int enable) { volatile uint32_t *Piezo = (volatile uint32_t *)PIEZO_ADDRESS; if (enable) { *Piezo = count | 0x1000000; } else { *Piezo = count & ~0x1000000; } } void Piezo_play(uint32_t note) { Piezo_set(note, 1); }