40 lines
733 B
C
40 lines
733 B
C
#include <stddef.h>
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#include <msp430g2553.h>
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#include <stdint.h>
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#include "scheduler.h"
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#include "spi.h"
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#include "soundCodes.h"
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#include "config.h"
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volatile uint8_t cmd;
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void spiInit() {
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// SPI slave
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// BIT4: UCB0STE
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// BIT5: UCB0CLK
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// BIT6: UCB0SOMI
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// BIT7: UCB0SIMO
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P1SEL |= BIT4 | BIT5 | BIT7;
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P1SEL2 |= BIT4 | BIT5 | BIT7;
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// most significant bit first, enable STE
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UCB0CTL0 = UCCKPH | UCSYNC | UCMSB | UCMODE_2;
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UCB0CTL1 = 0x00;
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// enable RX interrupt
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UC0IE |= UCB0RXIE;
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cmd = SOUND_IDLE;
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schAdd(spiCmdHandler, NULL, 0, 5);
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}
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void spiCommandDispatcher() {
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cmd &= ~SOUND_COMMAND;
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if (cmd & SOUND_SUBCMD_AMPLITUDE) {
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cmd &= ~SOUND_SUBCMD_AMPLITUDE;
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configSetAmplitude(cmd);
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}
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}
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