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Motorcycle Communication and Music Station

Motorcycle Communication and Music Station. System Software Presentation Keith Mikoleit WWU 2010. General System Design. MCU: MC9S12XS128 Bus Frequency: 24 Mhz Memory Requirements ROM: ~ 4 Kbytes Program Storage RAM: ~ 500 bytes Variables and Data Available Memory 128 Kbytes Flash

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Motorcycle Communication and Music Station

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  1. Motorcycle Communication and Music Station System Software Presentation Keith Mikoleit WWU 2010

  2. General System Design MCU: MC9S12XS128 Bus Frequency: 24 Mhz Memory Requirements • ROM: ~ 4 Kbytes • Program Storage • RAM: ~ 500 bytes • Variables and Data Available Memory • 128 Kbytes Flash • 8 Kbytes RAM

  3. Kernel Design Time Slice Scheduler • Slice Period: 10 ms • Switch Debouncing • 4 + 1 Tasks • 2 ISRs

  4. State Diagram PTT : Push to Talk

  5. Task/ISR Timing

  6. Key Task • Scan UI Switches • Interpret and Set Commands State Control Task • Switch System States • Control Audio Signal Switching

  7. iPod Task • Send Commands to the iPod • Display iPod Data on LCD Intercom Task • PTT (Transceiver Control) • Send RF call • Check Incoming Call Data • Signal Strength A/D and Display

  8. SCI0RD ISR • Read Data from SCI0 • Set iPod Data Ready Flag SCI1RD ISR • Read Data from SCI1 • Set RF Data Ready Flag

  9. Modules

  10. Modules

  11. State Control UI Switch I/O Main.c Audio Control and RF I/O PA[3:0] PM[5] Key Task StateCtrlTask PAD[6:0] LCD I/O Mode Switch System State PT[7:1] PB[6:5] Intercom Task iPod Task

  12. iPod Command Send UI Switch I/O Main.c Key Task To iPod SCI0 RemoteMode() AdvancedMode() iPodPlay() iPodStop() iPodBack() iPodForward() PAD[6:0] iPodTask Music Commands

  13. iPod Data Receive iPodInterface.c Main.c LCD I/O SCI0RD From iPod PT[7:1] PB[6:5] SCI0 iPodTask iPod Data

  14. RF Call Send Main.c StateCtrl Task To RF Tx SCI1 Call() IntercomTask System State

  15. RF Call Receive Intercom.c Main.c LCD I/O SCI1RD From RF Rx PT[7:1] PB[6:5] SCI1 Intercom Task RF Data

  16. Signal Strength A/D I/O A/D Converter Main.c ATDCTL5 From RSSI SignalStrength() AN7 Ts = 1 sec Intercom Task PAD[7] ADR0DR7H

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