82 lines
1.6 KiB
C
82 lines
1.6 KiB
C
#define SPI_NO_OP_1 1
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#define SPI_NO_OP_2 2
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#define SPI_START_TX 4
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#define SPI_TRANSMIT 8
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#define SPI_HIGH_HEX 16
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#define SPI_TO_FROM_UART 32
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#define SPI_NEW_CTRL_MSG 64
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#define SPI_END_OF_TX 0x00
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#define SPI_END_OF_MESSAGE '.'
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#define SPI_FORWARD_TO_UART_PORT 'u'
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#define SPI_FORWARD_TO_CTRL_PORT 'l' // 'l'ocal port
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struct event_struct {
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uint16_t wdt;
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uint16_t brown_out;
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};
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struct sensor_struct {
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uint32_t counter;
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uint16_t meterconst;
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};
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# define WATT 1000000000
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# define SECOND 665 // 666Hz - 1
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#define STATE_PULSE 1
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#define STATE_SKIP 2
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#define STATE_POWER_CALC 4
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#define STATE_POWER 8
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struct state_struct {
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uint8_t flags;
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uint32_t nano;
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uint32_t nano_start;
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uint32_t nano_end;
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uint8_t pulse_count;
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uint8_t pulse_count_final;
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uint32_t power;
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uint32_t timestamp;
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};
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struct time_struct {
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uint8_t skip;
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uint32_t ms;
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};
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/*
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* This macro performs a 16x16 -> 32 unsigned MAC in 37 cycles with operands and results in memory
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* based on http://www2.ife.ee.ethz.ch/~roggend/publications/wear/DSPMic_v1.1.pdf par 3.4 and table 31.
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*/
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#define MacU16X16to32(uint_32Acc, uint_16In1, uint_16In2) \
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asm volatile ( \
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"clr r2 \n\t" \
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"mul %B2, %B1 \n\t" \
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"movw r4, r0 \n\t" \
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"mul %A2, %A1 \n\t" \
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"add %A0, r0 \n\t" \
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"adc %B0, r1 \n\t" \
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"adc %C0, r4 \n\t" \
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"adc %D0, r5 \n\t" \
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"mul %B2, %A1 \n\t" \
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"add %B0, r0 \n\t" \
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"adc %C0, r1 \n\t" \
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"adc %D0, r2 \n\t" \
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"mul %A2, %B1 \n\t" \
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"add %B0, r0 \n\t" \
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"adc %C0, r1 \n\t" \
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"adc %D0, r2 \n\t" \
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"clr r1 \n\t" \
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: \
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"+r" (uint_32Acc) \
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: \
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"a" (uint_16In1), \
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"a" (uint_16In2) \
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: \
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"r2", "r4", "r5" \
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)
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