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53 lines
937 B
53 lines
937 B
15 years ago
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#include "spi_proto.h"
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#include "spi.h"
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uint8_t read[2];
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uint8_t write[4];
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void talk_to_slave(uint8_t opcode, uint8_t addr, uint8_t wlen, uint8_t rlen)
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{
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write[0] = opcode;
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write[1] = addr;
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spi_mst_start_packet();
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spi_mst_write(wlen, write);
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spi_mst_read(rlen, read);
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spi_mst_end_packet();
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}
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uint16_t read_temperature(uint8_t number)
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{
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talk_to_slave(1, number, 2, 2);
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return (read[0] << 8) | read[1];
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}
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uint8_t read_var8(uint8_t number)
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{
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talk_to_slave(2, number, 2, 2);
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return read[1];
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}
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uint16_t read_var16(uint8_t number)
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{
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talk_to_slave(3, number, 2, 2);
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return (read[0] << 8) | read[1];
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}
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void write_var8(uint8_t number, uint8_t value)
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{
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write[2] = 0;
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write[3] = number;
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talk_to_slave(4, number, 4, 0);
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}
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void write_var16(uint8_t number, uint16_t value)
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{
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write[2] = value >> 8;
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write[3] = value & 0xff;
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talk_to_slave(5, number, 4, 0);
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}
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void call_func(uint8_t number)
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{
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talk_to_slave(6, number, 2, 0);
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}
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