ServiceNonInterrupt.cpp

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00033 #include "ServiceNonInterrupt.h"
00034 #include "Streaming.h"
00035 #include "BMP280.h"
00036 #include "PacketFifo.h"
00037 #include "MAX30205.h"
00038 #include "Stream.h"
00039 #include "BMP280.h"
00040 #include "PacketFifo.h"
00041 #include "Peripherals.h"
00042 #include "Device_Logging.h"
00043 
00044 /// timer used for devices that do not have interrupt capability
00045 static Timer nonInterruptTimer;
00046 
00047 /// reference to logging object for the BMP280
00048 extern Device_Logging *bmp280_Logging;
00049 /// reference to logging object for the MAX30205 (instance 0)
00050 extern Device_Logging *MAX30205_0_Logging;
00051 /// reference to logging object for the MAX30205 (instance 1)
00052 extern Device_Logging *MAX30205_1_Logging;
00053 
00054 /**
00055 * @brief Initialize the book keeping variables for non interrupt devices
00056 */
00057 void ServiceNonInterrupt_Init(void) {
00058   // clear out the next time member in the device logging class
00059   //   this is so that the devices are sampled the very first go-around
00060   bmp280_Logging->setNextSampleTime(0);
00061   MAX30205_0_Logging->setNextSampleTime(0);
00062   MAX30205_1_Logging->setNextSampleTime(0);
00063 }
00064 
00065 /**
00066 * @brief Stop the 1 second timer
00067 */
00068 void ServiceNonInterrupt_StartTimer(void) {
00069   nonInterruptTimer.start();
00070   nonInterruptTimer.reset();
00071 }
00072 
00073 /**
00074 * @brief Stop the 1 second timer
00075 */
00076 void ServiceNonInterrupt_StopTimer(void) { nonInterruptTimer.stop(); }
00077 
00078 /**
00079 * @brief Get the current count of the timer
00080 * @return timer count in seconds
00081 */
00082 static int ServiceNonInterrupt_GetTimerCount(void) {
00083   return nonInterruptTimer.read();
00084 }
00085 
00086 /**
00087 * @brief Log the BMP280 sensor value if it is time
00088 * @param deviceLogging pointer to object that keeps track of logging for a
00089 * device
00090 */
00091 void ServiceNonInterrupt_BMP280(Device_Logging *deviceLogging) {
00092   int currentTime;
00093   uint32_t bmp280_data[2]; // index 0 - Temp (deg C), index 1 - Press (Pa).
00094                            // Divide the result by 10 to get the correct answer.
00095   float temp_C, press_P;
00096   int nextTime;
00097 
00098   if (deviceLogging->isLoggingEnabled() == 0)
00099     return;
00100   currentTime = ServiceNonInterrupt_GetTimerCount();
00101   nextTime = deviceLogging->getNextSampleTime();
00102   if ((nextTime == 0) || (currentTime >= nextTime)) {
00103     nextTime = currentTime + deviceLogging->getLoggingSampleRate();
00104     deviceLogging->setNextSampleTime(nextTime);
00105     Peripherals::bmp280()->ReadCompData(
00106         &temp_C, &press_P); // Read the Temp (index 0)  and Pressure (index 1)
00107     bmp280_data[0] = (int32_t)(temp_C * 10);
00108     bmp280_data[1] = (int32_t)(press_P * 10);
00109     PacketFifo_InsertPacket(PACKET_BMP280_PRESSURE, &bmp280_data[0],
00110                             2); // Read it and insert it into the FIFO
00111   }
00112 }
00113 
00114 /**
00115 * @brief Log the BMP280 sensor value if it is time
00116 * @param deviceLogging pointer to object that keeps track of logging for a
00117 * device
00118 * @param device pointer to the device instance (MAX30205 instance 0 or MAX30205
00119 * instance 1)
00120 * @param packetId packet id that is used when building a packet
00121 */
00122 void ServiceNonInterrupt_MAX30205(Device_Logging *deviceLogging,
00123                                   MAX30205 *device, uint32_t packetId) {
00124   int currentTime;
00125   uint32_t data;
00126   uint16_t tempData;
00127   int nextTime;
00128 
00129   if (deviceLogging->isLoggingEnabled() == 0)
00130     return;
00131   currentTime = ServiceNonInterrupt_GetTimerCount();
00132   nextTime = deviceLogging->getNextSampleTime();
00133   if ((nextTime == 0) || (currentTime >= nextTime)) {
00134     nextTime = currentTime + deviceLogging->getLoggingSampleRate();
00135     deviceLogging->setNextSampleTime(nextTime);
00136     device->readTemperature(&tempData);
00137     // assemble this in the correct order
00138     data = (uint32_t)((tempData >> 8) + ((tempData & 0xFF) << 8));
00139     PacketFifo_InsertPacket(packetId, &data,
00140                             1); // Read it and insert it into the FIFO
00141   }
00142 }