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57 lines
1.3 KiB
57 lines
1.3 KiB
/*
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This project is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Multiprotocol is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Multiprotocol. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include "pins.h"
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#include "spi.h"
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/********************/
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/** SPI routines **/
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/********************/
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void SPI_Write(uint8_t command)
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{
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uint8_t n=8;
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SCLK_off;//SCK start low
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SDI_off;
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do
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{
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if(command&0x80)
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SDI_on;
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else
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SDI_off;
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SCLK_on;
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//delay(1);
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command = command << 1;
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SCLK_off;
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}
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while(--n) ;
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SDI_on;
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}
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uint8_t SPI_Read(void)
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{
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uint8_t result=0,i;
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for(i=0;i<8;i++)
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{
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result=result<<1;
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if(SDO_1)
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result |= 0x01;
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SCLK_on;
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NOP();
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SCLK_off;
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}
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return result;
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}
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