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111 lines
2.0 KiB
111 lines
2.0 KiB
#include "spi_proto.h"
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#include "spi.h"
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#ifndef SPI_MASTER
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#include "main.h"
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#include "filter.h"
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#endif
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/***** MASTER *****/
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uint8_t mst_buf[5];
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uint16_t spi_master_transceive(uint8_t opcode, uint8_t addr, uint16_t value)
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{
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// for(uint8_t j=0; j<10; ++j){
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mst_buf[0] = opcode;
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mst_buf[1] = addr;
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mst_buf[2] = value >> 8;
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mst_buf[3] = value & 0xff;
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mst_buf[4] = 0; // additional 0 to read the last byte from the slave
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spi_mst_start_packet();
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spi_mst_write_read(5,mst_buf);
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spi_mst_end_packet();
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spi_mst_packet_delay();
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for(uint8_t i=0; i<5; ++i){
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mst_buf[0] = 0;
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mst_buf[1] = 0;
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mst_buf[2] = 0;
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mst_buf[3] = 0;
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mst_buf[4] = 0;
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spi_mst_start_packet();
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spi_mst_write_read(5,mst_buf);
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spi_mst_end_packet();
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// bytes from slave are received shifted right by one
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if(mst_buf[1] == opcode && mst_buf[2] == addr){ // valid answer
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return ((mst_buf[3] << 8) | mst_buf[4]);
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}
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spi_mst_packet_delay();
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}
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// }
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return 0xffff; // error-code
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}
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uint16_t read_temperature(uint8_t number)
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{
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return 0;
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}
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uint8_t read_var8(uint8_t number)
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{
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return 0;
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}
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uint16_t read_var16(uint8_t number)
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{
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return 0;
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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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}
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void write_var16(uint8_t number, uint16_t value)
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{
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}
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void call_func(uint8_t number)
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{
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}
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/***** MASTER END *****/
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/***** SLAVE *****/
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uint16_t spi_proto_slaveaction(uint8_t opcode, uint8_t addr, uint16_t data) {
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uint16_t retval = 0;
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switch(opcode){
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case 1:
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retval = data;
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break;
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case 2:
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retval = (*spi_proto_globals8[addr]);
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break;
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case 3:
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retval = (*spi_proto_globals16[addr]);
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break;
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case 4:
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(*spi_proto_globals8[addr]) = data;
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break;
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case 5:
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(*spi_proto_globals16[addr]) = data;
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break;
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case 6:
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retval = (*spi_proto_funcs[addr])(data);
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//TODO: prevent a function from being run several times because the message gets repeated.
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break;
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case 7:
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#ifndef SPI_MASTER
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retval = get_temperature(addr);
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#endif
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break;
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default:
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break;
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}
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return retval;
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}
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/***** SLAVE END *****/
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