Digitally Configurable Audio Routing Patchbay DCARP System Software Presentation Aaron Cramer Western Washington University 2009

General System Design MCU: Cypress PSoC CY8C21001 Bus Frequency: 24MHz Memory Requirements:  ROM ~ 7.2 KB  User Data Storage: save up to 50 routing configurations 64Bytes/Configurations * 50 Configurations = 3.2 KB  Program Storage: ~ 4.0 KB  RAM ~ 450 Bytes  Copy 64Byte blocks from Flash  Miscellaneous variables, user module data, etc. PSoC Resources Used: o CSD: 3 digital blocks, 3 analog blocks o SPI: 1 digital block

State Machine Design System State Machine :  MAIN  ROUTE  SAVE  RECALL

State Description Prompts user to Route, Save, or Recall Endless loop monitors keypad for function sensor press, ignores all other input Main State

Route State Prompts user for source and destination channels Validates Channels Calls function to update current configuration and program crosspoint State Description

Save State Prompts user for configuration number Validates configuration number Calls function to store current configuration data in flash State Description

Recall State Prompts user for configuration number Validates configuration number Calls function to retrieve data from flash and program crosspoint State Description

CPU Load CPU Load: 100%  Sensor polling loops and blocking routines used  CPU is always doing something

Module Description ModuleFunctionsData Main.cMain(), ErrHandler()INT8U CurrentConfigArray[][], INT8U SourceCh, INT8U DestCh, INT8U ConfigNum SnsKeypad.cDynamicSensorScan(), DynamicBaselineInit(), GetAudioCh(), GetSelectedFnc(), GetConfigNum(), GetValidSensor() Route.cProgramCrosspointArray(), RouteAudio(), ConfigData.cSaveConfig(), RecallConfig()INT8U NewConfig[][] Cypress ModulesAPIs CapSense CSDCSD_Start(), CSD_ScanSensor(), CSD_UpdateSensorBaseline(), CSD_bIsSensorActive(), CSD_SetRefValue(), SPI MasterSPIM_Start(), SPIM_SendTxData(), SPIM_bReadStatus() LCDLCD_Start(), LCD_PrString() E2PROME2PROM_Start(), E2PROM_bE2Read(), E2PROM_bE2Write()

Dataflow Diagrams Main.cSnsKeypad.c MAIN STATEGetSelectedFnc() INT8U function ROUTE STATE GetAudioCh() GetConfigNum() SAVE STATE RECALL STATE INT8U *ErrCode INT8U channel INT8U *ErrCode INT8U config Capacitive Sensor Keypad Sensor 0 Sensor 1 Sensor 2 Sensor 3 Sensor 4 Sensor 5 Sensor 6 Sensor 7 Sensor 8 Sensor 9 Sensor 10 Sensor 11 Sensor 12

Dataflow Diagrams Main.cRoute.c ROUTE STATE RouteAudio() INT8U *SourceCh INT8U *Destination ProgramCrosspointArray() RECALL STATE *CurrentConfigArray[][] SPI *CurrentConfigArray[][]

Dataflow Diagrams SAVE STATE INT8U *CurrentConfigArray[][] SaveConfig() Main.cConfigData.cFlash INT8U *confignum RECALL STATE INT8U newconfig[][] INT8U *confignum RecallConfig()

Questions?