Generates a test signal on an AnalogOut and monitors a signal on an AnalogIn, plotting the test signal or the actual signal depending on a conditional compile. The wait() and wait_ms() library calls for this board are highly inaccurate so a new function is provided to wait for X number of milliseconds -- which is not very accurate.
Dependencies: LCD_DISCO_F429ZI mbed TS_DISCO_F429ZI mbed-os BSP_DISCO_F429ZI
LaserMon-TEC.cpp
- Committer:
- Damotclese
- Date:
- 2019-06-17
- Revision:
- 2:cbcf2695a4a1
File content as of revision 2:cbcf2695a4a1:
// ---------------------------------------------------------------------- // LaserMon-TEC.cpp // // Fredric L. Rice, June 2019 // // ---------------------------------------------------------------------- #include "mbed.h" // The mbed operating system #include "LCD_DISCO_F429ZI.h" // For controlling the LCD #include "TS_DISCO_F429ZI.h" // For controlling the touch screen #include "LaserMon-Main.h" // For data exported to us #include "LaserMon-TEC.h" // Always include ourself // ---------------------------------------------------------------------- // Local data storage // // ---------------------------------------------------------------------- // We bring in the TEC voltage to scan what it is static AnalogIn st_TECInput(TEC_VOLTAGE_IN); // We store the last ten TEC readings and keep a running average // of the last ten so that the main module may find out what the // average is and display it static uint16_t u16_TECHistory[TEC_HISTORY_COUNT_MAX]; static uint8_t u8_TECHistoryCount; static uint16_t u16_TECHistoryRunningAverage; // ---------------------------------------------------------------------- // TECGetLastTenAverage() // // ---------------------------------------------------------------------- uint16_t TECGetLastTenAverage(void) { return u16_TECHistoryRunningAverage; } // ---------------------------------------------------------------------- // // // ---------------------------------------------------------------------- void TECThread(void) { uint16_t u16_TECVoltage = 0; float f_rawTECVoltage = 0.0f; // Get the current voltage f_rawTECVoltage = st_TECInput.read() * 3.3f; // The TEC voltage is converted from a floating point in to // 16 bit value with the value after the decimal moved to // the right by two decimal place u16_TECVoltage = (uint16_t)(f_rawTECVoltage * 100.0f); // Inform the main module what the TEC voltage is LaserMonMainInformTECVoltage(u16_TECVoltage); // Do we have lessd than our TEC history values stored so far? if (u8_TECHistoryCount < TEC_HISTORY_COUNT_MAX) { // Since we have fewer than our maximum history, store it u16_TECHistory[u8_TECHistoryCount++] = u16_TECVoltage; } else { #if 1 // Discard the oldest history value that we have for (uint8_t u8_thisValue = 1; u8_thisValue < TEC_HISTORY_COUNT_MAX; u8_thisValue++) { // Move the history value over to the left once u16_TECHistory[u8_thisValue] = u16_TECHistory[u8_thisValue - 1]; } // Now store the latest value in to the history array u16_TECHistory[TEC_HISTORY_COUNT_MAX - 1] = u16_TECVoltage; #endif } // Compute the average TEC value u16_TECHistoryRunningAverage = 0; for (uint8_t u8_thisValue = 0; u8_thisValue < u8_TECHistoryCount; u8_thisValue++) { u16_TECHistoryRunningAverage += u16_TECHistory[u8_thisValue]; } // Compute the average u16_TECHistoryRunningAverage /= u8_TECHistoryCount; } // ---------------------------------------------------------------------- // // // ---------------------------------------------------------------------- void TECInit(void) { // Initialize locally-held data u8_TECHistoryCount = 0; u16_TECHistoryRunningAverage = 0; } // End of file