FreeCalypso > hg > fc-tourmaline
changeset 290:0e5ccb343284
implement PWT buzzer driver
The piece implemented here is the low-level driver component; there will
also be a higher-level buzzer melody player service, to be implemented
in RiViera land, that will be the sole caller of PWT API functions
provided by the present driver.
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Sat, 26 Mar 2022 18:23:50 +0000 |
| parents | 4d203ef0eb4b |
| children | a72feaed133a |
| files | components/buzzer src/cs/drivers/drv_app/buzzer/pwt.c src/cs/drivers/drv_app/buzzer/pwt.h |
| diffstat | 3 files changed, 52 insertions(+), 0 deletions(-) [+] |
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line diff
--- a/components/buzzer Sat Mar 26 17:03:36 2022 +0000 +++ b/components/buzzer Sat Mar 26 18:23:50 2022 +0000 @@ -36,4 +36,5 @@ SRCDIR=$SRC/cs/drivers/drv_app/buzzer cfile_plain $SRCDIR/buzzer.c +cfile_plain $SRCDIR/pwt.c cfile_plain $SRCDIR/vibrator.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/cs/drivers/drv_app/buzzer/pwt.c Sat Mar 26 18:23:50 2022 +0000 @@ -0,0 +1,42 @@ +/* + * This C module is a FreeCalypso addition: it implements hw driver functions + * for Calypso buzzer output in PWT mode. + */ + +#include "main/sys_types.h" +#include "pwt.h" + +#define ASIC_CONF_REG (*(volatile SYS_UWORD16 *) 0xFFFEF008) +#define PWT_MODE_MASK 0x0020 + +#define PWT_FRC_REG (*(volatile SYS_UWORD8 *) 0xFFFE8800) +#define PWT_VCR_REG (*(volatile SYS_UWORD8 *) 0xFFFE8801) +#define PWT_GCR_REG (*(volatile SYS_UWORD8 *) 0xFFFE8802) + +/* flag tells L1 to suppress deep sleep */ +SYS_BOOL PWT_tone_is_on; + +void PWT_block_on(void) +{ + ASIC_CONF_REG |= PWT_MODE_MASK; + PWT_GCR_REG = 0x01; +} + +void PWT_block_off(void) +{ + ASIC_CONF_REG &= ~PWT_MODE_MASK; + PWT_GCR_REG = 0; +} + +void PWT_play_tone(SYS_UWORD8 note, SYS_UWORD8 volume) +{ + PWT_FRC_REG = note; + PWT_VCR_REG = (volume << 1) | 1; + PWT_tone_is_on = 1; +} + +void PWT_stop_tone(void) +{ + PWT_VCR_REG = 0; + PWT_tone_is_on = 0; +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/cs/drivers/drv_app/buzzer/pwt.h Sat Mar 26 18:23:50 2022 +0000 @@ -0,0 +1,9 @@ +/* + * 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);