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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| projects:generator [2015/03/22 21:55] – external edit 127.0.0.1 | projects:generator [2017/03/07 05:57] (current) – [Schematic] darron | ||
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| - | ==== dsPIC tone generator ==== | + | ==== dsPIC/ |
| <wrap right> | <wrap right> | ||
| {{: | {{: | ||
| </ | </ | ||
| - | This is a project for the dsPIC33FJ128GP802 acting as a tone generator connected to a [[: | + | This is a project for the dsPIC33FJ128GP802 |
| Four separate tones may be generated simultaneously from five different waves and each tone can be any audible frequency. | Four separate tones may be generated simultaneously from five different waves and each tone can be any audible frequency. | ||
| Line 11: | Line 11: | ||
| This project is under development and certain aspects may change and features added or removed at any time. | This project is under development and certain aspects may change and features added or removed at any time. | ||
| + | |||
| === Waves === | === Waves === | ||
| Line 26: | Line 27: | ||
| === Schematic === | === Schematic === | ||
| - | This is the bare minimum layout required for this project. We will use a [[: | + | This is the bare minimum layout required for this project |
| {{: | {{: | ||
| + | |||
| + | For PIC32 an external audio DAC is required. Only the CS4334K and PT8211 are supported | ||
| + | at present and are selected at compile time. Connection to either device is as follows. | ||
| + | |||
| + | <columns 50% 50% -> | ||
| + | < | ||
| + | CS4334K WITH Vcc = 5V. | ||
| + | |||
| + | PIC32MX150 | ||
| + | ---------- | ||
| + | PIN 15 RPB6 PIN 4 MCLK 128X OVERSAMPLING CLOCK | ||
| + | PIN 16 RPB7 PIN 3 LRCK SAMPLE RATE LEFT/RIGHT CLOCK | ||
| + | PIN 17 RPB8 PIN 1 SDATA | ||
| + | PIN 18 RPB9 PIN 2 DEM/ | ||
| + | PIN 25 SCK1 UNUSED | ||
| + | </ | ||
| + | |||
| + | </ | ||
| + | |||
| + | <columns 50% 50% -> | ||
| + | |||
| + | < | ||
| + | PT8211 WITH Vdd = 5V. | ||
| + | |||
| + | PIC32MX150 | ||
| + | ---------- | ||
| + | PIN 15 RPB6 UNUSED | ||
| + | PIN 16 RPB7 PIN 2 WS SAMPLE RATE LEFT/RIGHT CLOCK | ||
| + | PIN 17 RPB8 PIN 3 SDATA | ||
| + | PIN 18 RPB9 UNUSED | ||
| + | PIN 25 SCK1 PIN 1 BCK | ||
| + | </ | ||
| + | |||
| + | </ | ||
| + | |||
| + | The CS4334K is a far superior device, but the PT8211 is incredibly cheap (15p each). | ||
| === Firmware === | === Firmware === | ||
| - | First install a working [[: | + | For dSPIC First install a working [[: |
| - | Now build the dsPIC application. | + | Now build the dsPIC/PIC32 applications. |
| < | < | ||
| hg clone http:// | hg clone http:// | ||
| - | cd generator | + | cd generator/src |
| make | make | ||
| </ | </ | ||
| [[: | [[: | ||
| + | |||
| + | Eg. | ||
| < | < | ||
| - | p24 lvp program | + | p24 lvp program |
| </ | </ | ||
| Line 68: | Line 107: | ||
| | / | The accumulator low word is transferred to the voice volume word | | | / | The accumulator low word is transferred to the voice volume word | | ||
| | % | The accumulator low word is transferred to the voice square wave duty word | | | % | The accumulator low word is transferred to the voice square wave duty word | | ||
| - | | @ | The accumulated | + | | @ | The accumulater low word is transferred to the voice ADSR envelope |
| | ! | Trigger the voice ADSR envelope | | ! | Trigger the voice ADSR envelope | ||
| | > | The accumulator low nibble is transferred to the voice selection byte | | | > | The accumulator low nibble is transferred to the voice selection byte | | ||
| Line 105: | Line 144: | ||
| === Resources === | === Resources === | ||
| [[http:// | [[http:// | ||
| + | |||
