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87 lines
1.8 KiB
87 lines
1.8 KiB
10 years ago
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/* 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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