SPMA078 March   2021 TM4C1290NCPDT , TM4C1290NCPDT , TM4C1290NCZAD , TM4C1290NCZAD , TM4C1292NCPDT , TM4C1292NCPDT , TM4C1292NCZAD , TM4C1292NCZAD , TM4C1294KCPDT , TM4C1294KCPDT , TM4C1294NCPDT , TM4C1294NCPDT , TM4C1294NCZAD , TM4C1294NCZAD , TM4C1297NCZAD , TM4C1297NCZAD , TM4C1299KCZAD , TM4C1299KCZAD , TM4C1299NCZAD , TM4C1299NCZAD , TM4C129CNCPDT , TM4C129CNCPDT , TM4C129CNCZAD , TM4C129CNCZAD , TM4C129DNCPDT , TM4C129DNCPDT , TM4C129DNCZAD , TM4C129DNCZAD , TM4C129EKCPDT , TM4C129EKCPDT , TM4C129ENCPDT , TM4C129ENCPDT , TM4C129ENCZAD , TM4C129ENCZAD , TM4C129LNCZAD , TM4C129LNCZAD , TM4C129XKCZAD , TM4C129XKCZAD , TM4C129XNCZAD , TM4C129XNCZAD

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Definitions
  3. 2Theory of Operation
    1. 2.1 Normal Use
    2. 2.2 Normal Endurance
    3. 2.3 High Endurance Use
    4. 2.4 Data Integrity
    5. 2.5 CRC Module
  4. 3Software Description
    1. 3.1 Environment
    2. 3.2 Files
    3. 3.3 Functions
      1. 3.3.1  FeeInit
      2. 3.3.2  FeeCheckDatasetValid
      3. 3.3.3  FeeFormat
      4. 3.3.4  FeeRead
      5. 3.3.5  FeeWrite
      6. 3.3.6  FeeGetStatus
      7. 3.3.7  FeeGetJobResults
      8. 3.3.8  FeeGetDatasetCounter
      9. 3.3.9  FeeGetVersionInformation
      10. 3.3.10 FeeMainFunction
  5. 4Execution Time
    1. 4.1 Read Time
    2. 4.2 Write Time
      1. 4.2.1 Write Time When no Erase is Required
      2. 4.2.2 Write Time when Sector Copy is Required
      3. 4.2.3 Write Time when Sector Copy is Required and Copy Sector is Full
      4. 4.2.4 Write Time with Interrupts
  6. 5Examples
    1. 5.1 Polling Fee Example
    2. 5.2 Interrupt Fee Example
    3. 5.3 Import, Program and Run Examples
      1. 5.3.1 To Import the Project into CCS, First Select "File" → "Import"
      2. 5.3.2 Select "CCS Projects" to Import the Example, Then Click "Next"
      3. 5.3.3 Provide the Path to Either the Unzipped Project by Selecting the First Radio Button or Import the Sip File Directly by Selecting the Second Radio Button. Click the "Copy Projects Into Workspace".
      4. 5.3.4 After the Project Path is Provided, it Will Show up as a Discovered Project. Click the "Finish" Button to Complete the Import.
      5. 5.3.5 Program the Example into the Flash Memory and Start Executing the Example
      6. 5.3.6 Configure the Serial Terminal Window
      7. 5.3.7 Run the Example
  7. 6Summary

4.2.4 Write Time with Interrupts

As shown in Section 4.2.1, the time to write a four word dataset is about 2.4 ms. When in polling mode, the CPU is waiting the full 2.4 ms for the write operations to complete. Writing in interrupt mode takes the same time, but the CPU is able to perform other tasks. Figure 4-4 below shows the time to complete writing a four word dataset in interrupt mode. There are eight writes, four data words and four control words. The first write start is indicated by marker A in the figure below. After roughly 290 µs, the first write completes and an interrupt is generated. The interrupt service routine takes roughly 10 µs and starts the second write. The total CPU time required to write the four word dataset is roughly 90 µs out of the 2.4 ms. That inclues an initial 10 µs for the FeeWrite() function and 10 us for each of eight interrupts.

GUID-20210201-CA0I-PBQ2-FQF6-NXCNPXCL00TB-low.pngFigure 4-4 Interrupt Routine Execution Time.