TCH tap: extend DL sniffing feature to support CSD modes Our debug feature for TCH DL sniffing reads the content of the DSP's a_dd_0 buffer (or a_dd_1 for TCH/H subchannel 1) at appropriate times and forwards captured bits to the host. This feature was originally implemented for TCH/FS, TCH/EFS and TCH/HS - now extend it to cover TCH/F data modes too.

/*
 * This header file is a FreeCalypso addition: it defines the functional
 * interface to the PWT buzzer driver.
 */

void PWT_block_on(void);
void PWT_block_off(void);
void PWT_play_tone(SYS_UWORD8 note, SYS_UWORD8 volume);
void PWT_stop_tone(void);