SigmaStudio for EVWSS

Question

Hello, 
 
 I am completely new in SigmaStudio, I would like to develop a electric vehicle warning sound system using SigmaStudio, It will be very helpful you guide me how to start on the same.

Thank you

Borkar · Accepted Answer

Hello Harish, 
 Thanks a lot for your support, I wanted to generate the artificial Engine Sound for electric vehicle (ex. Sound of Bullet Bike), for that I am planning to start with ADAU1450 DSP or you may suggest any appropriate microcontroller for my requirement. 
 Thanks and Regards 
 Gajanan Borkar)

Harishgowtham · Answer

Hello Borkar, 
 Your description seems bit general, However I have attached an example project here just to give an idea, please have a look. 
 
 In this example, Let's say a music signal is playing, whenever your condition is met (let's say above 80kmph) and there should be trigger (a rising edge), As soon as the trigger signal comes, the music will be played along with the alarm signal. Once a trigger is encountered, the alarm signal will be played for 10sec (you can adjust it even for minutes), no matter you change the trigger input back to zero (logic LOW) within that 10sec. It will be constantly playing for 10sec. After 10sec it will stop and again check for a trigger signal. If it's low, then a normal music will only be playing. If it senses a rising edge (transition of logic LOW to HIGH) then the same repeats as described above. 
 Since I don't know your exact requirement, I just give this project to you to have an idea about how this works. If you have any particular design or program flow or order of working, then I may be able to help you with a project as you expect. 
 This attached project has a wav player, so the wav file is also attached here. 
 Please mention which DSP you are using. 
 Warning sys.zip 
 Kindly do reply if you have further queries. 
 Regards, 
 Harish

Harishgowtham · Answer

Hello Gajanan, 
 Are you using any external flash memory to store the wav files? or you wrote the wav files to an EEPROM and overwriting this with your self-boot program? If you are writing a program to an EEPROM then the previously written program will be overwritten by the new program. It's like deleting the old program and writing the new program. 
 If your wav files are small enough, then you can use wav player (internal/without trigger) and use the internal RAM and write the entire program to EEPROM and self-boot from it. Please look here . 
 If those files are large, then you have to use an external flash memory to read the files. For that an instance of a master control port can be created with external memory to configure protocol, address etc. please look here . 
 You can use the flash programmer to write those files to the SPI flash. please look here . 
 Are you using an external memory? since you didn't attach your project, I don't know what configs you did with the master control. port 
 Regarding the amplifiers, take a look at this ( 2&times;, 31.76 W, Digital Input, Filterless Stereo Class-D Audio Amplifier ) 
 If you want more info, then feel free to post a question here: Amplifiers - EngineerZone (analog.com) 
 Regards, 
 Harish

Harishgowtham · Answer

Hello Gajanan, 
 Self-boot will be done by only using the main latch that is SS_M pin. Only this SS_M pin will be acting as a Slave Select pin for the SPI EEPROM embedded on the eval board. So, by using flash programmer module, you can see that you can only use other MP pins as a SS but not SS_M. So, it's not possible to use the flash programmer to write your wav files to the on-board SPI EEPROM. You can only use the flash programmer with external memory like SPI flash, etc. 
 Initially you will store your wav files to your external SPI flash by using flash programmer (MP pin is used as a SS) and then another project is created with your own processing elements and a master control port instance. You have to provide the SPI flash configs like speed, address,etc. in this master control port instance. For the SPI flash config, you will use a MP pin as a SS here. This entire program (not the one with flash programmer) is supposed to be written to the on-board SPI EEPROM which is going to be self-booted. This is the usual process. 
 Regards, 
 Harish

Harishgowtham · Answer

Hello Gajanan, 
 Sorry for the delay in response. 
 Please refer the rough block diagram attached below for the connections.

You can use any MP pins in between MP4 and MP13 as a slave select for your SPI flash. 
 You must use only SS_M pin as a slave select for the self-boot EEPROM. 
 SPI flash memories are widely available in the market. Choose which one is suitable for you. The memory depends on your wav files and also aware of the address accessible constrains. 
 Refer this Wav player page for more info. 
 
 Regards, 
 Harish

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