Rev 2772 Rev 2774
Line 16... Line 16...
16 #define SPI_MODE_0 (SPI_L_TO_H | SPI_XMIT_L_TO_H) 16 #define SPI_MODE_0 (SPI_L_TO_H | SPI_XMIT_L_TO_H)
17 #define SPI_MODE_1 (SPI_L_TO_H) 17 #define SPI_MODE_1 (SPI_L_TO_H)
18 #define SPI_MODE_2 (SPI_H_TO_L) 18 #define SPI_MODE_2 (SPI_H_TO_L)
19 #define SPI_MODE_3 (SPI_H_TO_L | SPI_XMIT_L_TO_H) 19 #define SPI_MODE_3 (SPI_H_TO_L | SPI_XMIT_L_TO_H)
20   20  
21 unsigned int16 a0; 21 signed int16 a0;
22 unsigned int16 b1; 22 signed int16 b1;
23 unsigned int16 b2; 23 signed int16 b2;
24 unsigned int16 c12; 24 signed int16 c12;
25   25  
26   26  
27 int MPL_init() 27 int MPL_init()
28 { 28 {
29 unsigned int8 a0_MSB, a0_LSB; 29 unsigned int8 a0_MSB, a0_LSB;
Line 62... Line 62...
62 c12 = ((int16) c12_MSB << 8) + c12_LSB; 62 c12 = ((int16) c12_MSB << 8) + c12_LSB;
63 } 63 }
64   64  
65 float MPL_get_pressure() 65 float MPL_get_pressure()
66 { 66 {
67 int8 LSB_data, MSB_data; 67 unsigned int8 LSB_data, MSB_data;
68 int16 ADC_pressure, ADC_temperature; 68 unsigned int16 ADC_pressure, ADC_temperature;
69   69  
70 output_low(CSN_SPI); //Start temperature and pressure conversion 70 output_low(CSN_SPI); //Start temperature and pressure conversion
71 spi_write(0x24); 71 spi_write(0x24);
72 spi_write(0x00); 72 spi_write(0x00);
73 output_high(CSN_SPI); 73 output_high(CSN_SPI);
74   74  
75 delay_ms(3); 75 delay_ms(10);
76 76
77 output_low(CSN_SPI); // get MSB for Pressure 77 output_low(CSN_SPI); // get MSB for Pressure
78 spi_write(0x80); 78 spi_write(0x80);
79 LSB_data = spi_read(0x00); 79 LSB_data = spi_read(0x00);
80 spi_write(0x82); // get LSB for Pressure 80 spi_write(0x82); // get LSB for Pressure
81 MSB_data = spi_read(0x00); 81 MSB_data = spi_read(0x00);
-   82 output_high(CSN_SPI);
82   83  
-   84 printf("%lX %lX\r\n", MSB_data, LSB_data);
83 ADC_pressure = ((int16) MSB_data << 8) + LSB_data; // conversion of 8bit registers to 16bit variable 85 ADC_pressure = ((int16) MSB_data << 8) + LSB_data; // conversion of 8bit registers to 16bit variable
84   86  
-   87 output_low(CSN_SPI);
85 spi_write(0x84); 88 spi_write(0x84);
86 LSB_data = spi_read(0x00); 89 LSB_data = spi_read(0x00);
87 spi_write(0x86); // get LSB for Temperature 90 spi_write(0x86); // get LSB for Temperature
88 MSB_data = spi_read(0x00); 91 MSB_data = spi_read(0x00);
89 spi_read(0x00); 92 spi_read(0x00);
90 output_high(CSN_SPI); 93 output_high(CSN_SPI);
91   94  
-   95 printf("%lX %lX\r\n", MSB_data, LSB_data);
92 ADC_temperature = ((int16) MSB_data << 8) + LSB_data; // conversion of 8bit registers to 16bit variable 96 ADC_temperature = ((int16) MSB_data << 8) + LSB_data; // conversion of 8bit registers to 16bit variable
93   97  
94 // printf("%lX %lX\r\n", ADC_pressure, ADC_temperature); 98 printf("%lX %lX\r\n", ADC_pressure, ADC_temperature);
95   99  
96 return (a0 + (b1 + c12 * ADC_temperature) * ADC_pressure + b2 * ADC_temperature ); 100 return (a0 + (b1 + c12 * ADC_temperature) * ADC_pressure + b2 * ADC_temperature );
97 } 101 }
98   102  
99 void main() 103 void main()
Line 105... Line 109...
105   109  
106 MPL_init(); 110 MPL_init();
107   111  
108 while(true) 112 while(true)
109 { 113 {
-   114 // MPL_init();
110 printf("%f \r\n", MPL_get_pressure()); 115 // printf("%f \r\n", MPL_get_pressure());
-   116 // printf("%ld %ld %ld %ld \r\n",a0, b1, b2, c12);
-   117 MPL_get_pressure();
-   118  
111 delay_ms(100); 119 delay_ms(500);
112 } 120 }
113 } 121 }