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00039 #include "spi.h"
00040
00041 void spi_write(uns8 data) {
00042
00043 uns8 count;
00044 for (count = 0; count < 8; count++) {
00045 clear_pin(spi_clk_port, spi_clk_pin);
00046 change_pin(spi_data_port, spi_data_pin, data.7);
00047 data = data << 1;
00048 set_pin(spi_clk_port, spi_clk_pin);
00049 }
00050
00051 }
00052
00053
00054
00055 void spi_write_lsb(uns8 data) {
00056
00057 uns8 count;
00058
00059
00060 for (count = 0; count < 8; count++) {
00061 clear_pin(spi_clk_port, spi_clk_pin);
00062 change_pin(spi_data_port, spi_data_pin, data.0);
00063 data = data >> 1;
00064 set_pin(spi_clk_port, spi_clk_pin);
00065 }
00066
00067 }
00068
00069 void spi_setup() {
00070 clear_bit(tris_array[spi_clk_port - PORTA], spi_clk_pin);
00071 clear_bit(tris_array[spi_data_port - PORTA], spi_data_pin);
00072
00073 }
00074
00075 void spi_write_sure(uns8 data) {
00076
00077 uns8 count;
00078 uns8 data_in;
00079
00080 data_in = data;
00081 for (count = 0; count < 8; count++) {
00082 change_pin(spi_data_port, spi_data_pin, data_in.0);
00083 clear_pin(spi_clk_port, spi_clk_pin);
00084 set_pin(spi_clk_port, spi_clk_pin);
00085 data_in = data_in >> 1;
00086 }
00087 }
00088
00089
00090 void spi_pulse_0() {
00091 change_pin(spi_data_port, spi_data_pin, 0);
00092 clear_pin(spi_clk_port, spi_clk_pin);
00093 set_pin(spi_clk_port, spi_clk_pin);
00094 }
00095
00096 void spi_pulse_1() {
00097 change_pin(spi_data_port, spi_data_pin, 1);
00098 clear_pin(spi_clk_port, spi_clk_pin);
00099 set_pin(spi_clk_port, spi_clk_pin); /
00100 }