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86 lines
1.8 KiB
86 lines
1.8 KiB
/* mpl3115a2.c */ |
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#include "sensors.h" |
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#include "mpl3115a2.h" |
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#include "i2c.h" |
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#include "event.h" |
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#include "log.h" |
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#include "uart.h" |
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bool mpl3115a2_state; |
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i2c_result mpl3115a2_result; |
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unsigned char mpl3115a2_sample_data[5]; |
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#define LOG_SIGNATURE_ALTIMETER 0xDA7AAA70 |
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unsigned char mpl3115a2_start_command[] = {0x26, 0x82}; |
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unsigned char mpl3115a2_read_address[] = {0x01}; |
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struct i2c_transaction mpl3115a2_start_transaction = { |
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(0x60 << 1) + 0, /* write */ |
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sizeof(mpl3115a2_start_command), |
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mpl3115a2_start_command, |
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&mpl3115a2_result, |
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EVENT_MPL3115A2_I2C_COMPLETE, |
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NULL |
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}; |
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struct i2c_transaction mpl3115a2_sample_transaction2; |
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struct i2c_transaction mpl3115a2_sample_transaction = { |
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(0x60 << 1) + 0, /* write */ |
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sizeof(mpl3115a2_read_address), |
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mpl3115a2_read_address, |
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&mpl3115a2_result, |
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EVENT_MPL3115A2_I2C_COMPLETE, |
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&mpl3115a2_sample_transaction2 |
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}; |
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struct i2c_transaction mpl3115a2_sample_transaction2 = { |
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(0x60 << 1) + 1, /* read */ |
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5, |
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mpl3115a2_sample_data, |
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&mpl3115a2_result, |
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EVENT_MPL3115A2_I2C_COMPLETE, |
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NULL |
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}; |
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void mpl3115a2_event_handler(void); |
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bool mpl3115a2_init(void) |
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{ |
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event_register(EVENT_MPL3115A2_I2C_COMPLETE, mpl3115a2_event_handler); |
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mpl3115a2_state = 0; |
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return TRUE; |
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} |
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bool mpl3115a2_start_sample(void) |
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{ |
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mpl3115a2_state = !mpl3115a2_state; |
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if (mpl3115a2_state) |
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return i2c_start_transaction(&mpl3115a2_start_transaction); |
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else |
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return i2c_start_transaction(&mpl3115a2_sample_transaction); |
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} |
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void mpl3115a2_event_handler(void) |
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{ |
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if (mpl3115a2_result != I2C_SUCCESS) |
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return; |
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mpl3115a2_result = I2C_IN_PROGRESS; |
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sensors_sample_done(); |
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/* If we just started a conversion, our job is done for now */ |
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if (mpl3115a2_state) |
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return; |
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log_put_uint(LOG_SIGNATURE_ALTIMETER); |
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log_put_array((char *)mpl3115a2_sample_data, 5); |
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} |
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