Microchip Technology dsPIC DSC DTMF, Руководство пользователя

Страница: 31 / 36

©
2008 Microchip Technology Inc. DS70332A-page 27
dsPIC
®
DSC DTMF DETECTION
LIBRARY USER’S GUIDE
Appendix A. Drivers
This section provides information about the drivers used with the dsPIC DSC DTMF
Detection Library.
A.1 DAA/AFE DRIVER FUNCTIONS
The dsPIC33F device implements both 8.0 kHz and 7.2 kHz sampling rates when
communicating with the DAA/AFE. The following driver functions are provided to
operate the Si3021 chipset with different options:
• Init_Si3021
• SetFs7200
• SetFs8000
• go_on_hook
• go_off_hook
• speaker_off
Init_Si3021
Function
Used to initialize different parameters of Si3034/Si3035 AFE. Sets the sampling rate to
8 kHz and also sets different international control registers of this chipset to the
selected options.
Prototype
void Init_Si3021(void)
Arguments
None.
Return Value
None.
Code Example
Init_Si3021();