FreeCalypso > hg > fc-tourmaline

annotate src/cs/drivers/drv_app/buzzer/pwt.c @ 294:e17bdedfbf2b

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VIBR SWE initial implementation
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 27 Mar 2022 08:46:10 +0000
parents a72feaed133a
children
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1 /*
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2 * This C module is a FreeCalypso addition: it implements hw driver functions
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3 * for Calypso buzzer output in PWT mode.
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4 */
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5
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6 #include "main/sys_types.h"
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7 #include "pwt.h"
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8 #include "fc-target.h"
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9
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10 #define ASIC_CONF_REG (*(volatile SYS_UWORD16 *) 0xFFFEF008)
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11 #define PWT_MODE_MASK 0x0020
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12
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13 #define PWT_FRC_REG (*(volatile SYS_UWORD8 *) 0xFFFE8800)
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14 #define PWT_VCR_REG (*(volatile SYS_UWORD8 *) 0xFFFE8801)
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15 #define PWT_GCR_REG (*(volatile SYS_UWORD8 *) 0xFFFE8802)
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16
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17 /* flag tells L1 to suppress deep sleep */
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18 SYS_BOOL PWT_tone_is_on;
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19
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20 void PWT_block_on(void)
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21 {
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22 #ifdef TARGET_HAS_BUZZER
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23 ASIC_CONF_REG |= PWT_MODE_MASK;
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24 PWT_GCR_REG = 0x01;
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25 #endif
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26 }
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27
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28 void PWT_block_off(void)
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29 {
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30 #ifdef TARGET_HAS_BUZZER
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31 ASIC_CONF_REG &= ~PWT_MODE_MASK;
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32 PWT_GCR_REG = 0;
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33 #endif
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34 }
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35
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36 void PWT_play_tone(SYS_UWORD8 note, SYS_UWORD8 volume)
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37 {
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38 #ifdef TARGET_HAS_BUZZER
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39 PWT_FRC_REG = note;
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40 PWT_VCR_REG = (volume << 1) | 1;
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41 PWT_tone_is_on = 1;
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42 #endif
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43 }
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44
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45 void PWT_stop_tone(void)
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46 {
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47 #ifdef TARGET_HAS_BUZZER
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48 PWT_VCR_REG = 0;
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49 PWT_tone_is_on = 0;
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50 #endif
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51 }