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Hello all,
first, I want to thank you. With your help I was able to quickly understand ISD1700 functionnality (really bad datasheet !!).
I made a system that can speak numerous messages: Not full messages are recorded, but words.
Then I compose my message, sending play for words one after other.
My question is: How to copy memory from one ISD to another ? Is there a digital way via SPI commands ? I don't want to record my voice on each ISD !!!
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You have 2 choices.
1. Buy the evaluation kit (programmer) that Nuvoton makes. The new design supports "batch" programming. The old version from Winbond does not, so make sure it's the new one made by Nuvoton.
2. Build your own custom programmer. I did this for my laser tag system by embedding the "recorder" functions in my PIC firmware. SO I also wrote a simple Windows application (in Liberty Basic) that plays wav files and sends commands to the PIC telling it to START or STOP recording. It also sends address commands.
To make it easier, I set up a memory map of pre-defined addresses for the ISD1700. Then I just make sure that the wav files are not longer than each memory location. Since the wav files will usually be shorter than the memory slot, I send a STOP command after the PC plays the wav file. The ISD1700 will insert a EOM marker. When the ISD plays the file it will stop playback at the EOM (the EOM feature must be enabled).
Jim
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C Code, PIC SPI Settings
Hi Guys,
I started a project using the PIC16F887 and a WINBOND ISD1700 Chip. I've been struggling to get the SPI communications working.
In googling and searching through forums I came across this post.
In reading through your posts and some of the code you have posted, it appears that you guys "bit banged" the ISD commands. Have any of you used the specific hardware on your PICs? Do you know if this is possible?
I've used the PIC16F887 before with assembly so it's not that big of a deal to try and read your code, but I was wondering if any of you did any work in C? This is my first project using MPLAB and the HI-Tech C compiler.
Thanks, Alan
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Hmm, then you are at wrong forum. This is about PicBasic Pro compiler. Not the C compiler of any company.
Ioannis
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My Apologies
Ioannis,
I'm not a fan of those who stray off topic and don't pay attention to forum etiquette. More of my concern was whether or not any of you were able to use your PICs and the actual SPI hardware in them. Or did all of you "bit bang" to communicate?
Thanks, Alan
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Re: Winbond ISD1700 Voice Recorder
I implemented hardware SPI using a PIC 16F877A and an ISD1740. I do it with ASM, but you can translate it to PICBasic if needed.
I'm posting it here because is the most extensive thread in the subject I could found, and I haven't found information about how to do it by hardware anywhere. I haven't finish yet, but I will probably forget to post it here late, so here goes what I've done so far.
As PIC SPI is Msb -> Lsb and ISD1700 is Lsb -> Msb, everything is inverted.
Sorry for the code format, I couldn't find a way to post it properly formatted.Code:ISD commands: ;ISD led active on all the commands, for debugging, set bit 3 to 0 to disable ISD led flashing CONSTANT SND_CMD_PU = b'10001000' CONSTANT SND_CMD_SET_PLAY = b'00001001' CONSTANT SND_CMD_SET_REC = b'10001001' CONSTANT SND_CMD_PD = b'11101000' CONSTANT SND_CMD_CLR_INT = b'00101000' CONSTANT SND_CMD_WR_APC2 = b'10101110' CONSTANT SND_CMD_WR_NVCFG = b'01101010' CONSTANT SND_CMD_RD_STATUS = b'10101000' ;PIC ISD ports and pins CONSTANT SND_PUERTO_ES = PORTC CONSTANT SND_CONTROL_ES = TRISC CONSTANT SND_PIN_E = .4 CONSTANT SND_PIN_S = .5 CONSTANT SND_PUERTO_CLK = PORTC CONSTANT SND_CONTROL_CLK = TRISC CONSTANT SND_PIN_CLK = .3 CONSTANT SND_PUERTO_SS = PORTA CONSTANT SND_CONTROL_SS = TRISA CONSTANT SND_PIN_SS = .5 ;SPI configuration and activation ;PORTS config banksel SND_CONTROL_ES BCF SND_CONTROL_ES,SND_PIN_S BSF SND_CONTROL_ES,SND_PIN_E banksel SND_CONTROL_CLK BCF SND_CONTROL_CLK,SND_PIN_CLK banksel SND_PUERTO_ES BCF SND_PUERTO_ES,SND_PIN_S banksel SND_PUERTO_CLK BSF SND_PUERTO_CLK,SND_PIN_CLK ;SPI config banksel PIE1 BSF PIE1,SSPIE ;enable interrupt banksel SSPSTAT MOVLW b'00000000' MOVWF SSPSTAT ;SSPM3:0 = 0001 = Fosc/16 banksel SSPCON MOVLW b'00110001' MOVWF SSPCON ;use SS to signal command start/stop banksel SND_CONTROL_SS BCF SND_CONTROL_SS,SND_PIN_SS banksel SND_PUERTO_SS BSF SND_PUERTO_SS,SND_PIN_SS ;SPI usage if not using interrupts ;active waiting for SPI transmission to end snd_debug_esperar banksel SSPSTAT BTFSS SSPSTAT,BF GOTO snd_debug_esperar BCF SSPSTAT,BF RETURN ;SPI without interrupts, to verify it works snd_debug ;it has to be already configured, I'm ignoring ISD response banksel SND_PUERTO_SS BCF SND_PUERTO_SS,SND_PIN_SS ;start command banksel SSPBUF MOVLW SND_CMD_PU ;first byte MOVWF SSPBUF CALL snd_debug_esperar banksel SSPBUF MOVFW SSPBUF CLRW MOVWF SSPBUF call snd_debug_esperar banksel SND_PUERTO_SS BSF SND_PUERTO_SS,SND_PIN_SS ;enviar un SET_PLAY pagesel snd_debug banksel SND_PUERTO_SS BCF SND_PUERTO_SS,SND_PIN_SS MOVLW SND_CMD_SET_PLAY banksel SSPBUF MOVWF SSPBUF CALL snd_debug_esperar banksel SSPBUF MOVFW SSPBUF CLRW MOVWF SSPBUF call snd_debug_esperar banksel SSPBUF MOVFW SSPBUF MOVLW b'0000100' ; 0x10 inverted MOVWF SSPBUF call snd_debug_esperar banksel SSPBUF MOVFW SSPBUF MOVLW 0x00 MOVWF SSPBUF call snd_debug_esperar banksel SSPBUF MOVFW SSPBUF MOVLW b'0111111' ; 0x7E inverted MOVWF SSPBUF call snd_debug_esperar banksel SSPBUF MOVFW SSPBUF MOVLW 0x00 MOVWF SSPBUF call snd_debug_esperar banksel SSPBUF MOVFW SSPBUF CLRW MOVWF SSPBUF call snd_debug_esperar banksel SND_PUERTO_SS BSF SND_PUERTO_SS,SND_PIN_SS return
DAvid
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Yes, bit-banged.
The ISD1700 chips are tempermental to say the least. I have it working fine in my project, but there are some undocumented problems with this chip. Overall the documentation is inconsistent/poor and difficult to find current versions. I found out after a year of using this chip that I had the outdated datasheets.
Also, the development systems were redesigned when it moved from Winbond to Nuvoton. And the Winbond hardware does not work with Nuvoton software, so if you were unlucky to buy the early ones, you get to buy it all over again (or you just design your own). I like this chip, but Nuvoton does not help with the problems.
As for SPI, I have worked with the ISD1700 and another SPI device connected to the same PIC micro. Each device uses the complete opposite SPI communications format. The logic levels are inverted and the MSB/LSB is reversed on each device. I don't know which way is "standard" for SPI. So you may want to try changing MSB/LSB data and try inverting various signals (clock, data, chip select).
Otherwise the code examples in previous posts on this thread should be a good head start.
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They are indeed temperamental. The timing information in the data sheets may be off by as much as 25%, and this is different from one device model to the next.Originally Posted by milestag
I've been working with one for the past 2 weeks . . .
Russ
N0EVC, xWB6ONT, xWN6ONT
"Easy to use" is easy to say.
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