mirror of
https://github.com/ApacheThunder/GBA-Exploader.git
synced 2025-06-18 19:45:39 -04:00
540515c7fc
* Can now use gbaframes specific to a gba rom being loaded to ram/flash. Have a bmp file with filename matching the game rom being flashed in GBA_SIGN path. If it finds a matching BMP it will use that before falling back to the default gbaframe.bmp paths. * nds-bootstrap now used for booting retail NDS roms from file browser. Note that currently GBA-Exploader does not create new save files so only games with existing save files (currently hardcoded to GBA_SAV path like with GBA games) can be booted with this.
249 lines
7.3 KiB
C
249 lines
7.3 KiB
C
/*---------------------------------------------------------------------------------
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$Id: microphone.c,v 1.8 2008-11-12 17:47:12 dovoto Exp $
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Microphone control for the ARM7
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Copyright (C) 2005
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Michael Noland (joat)
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Jason Rogers (dovoto)
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Dave Murphy (WinterMute)
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Chris Double (doublec)
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any
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damages arising from the use of this software.
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Permission is granted to anyone to use this software for any
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purpose, including commercial applications, and to alter it and
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redistribute it freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you
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must not claim that you wrote the original software. If you use
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this software in a product, an acknowledgment in the product
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documentation would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and
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must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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---------------------------------------------------------------------------------*/
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#include <nds/interrupts.h>
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#include <nds/fifocommon.h>
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#include <nds/timers.h>
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#include <nds/arm7/audio.h>
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#include <nds/arm7/codec.h>
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void micSetAmp_TWL(u8 control, u8 gain);
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u16 micReadData16_TWL();
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//---------------------------------------------------------------------------------
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// Turn on the Microphone Amp. Code based on neimod's example.
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//---------------------------------------------------------------------------------
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void micSetAmp_NTR(u8 control, u8 gain) {
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//---------------------------------------------------------------------------------
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SerialWaitBusy();
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REG_SPICNT = SPI_ENABLE | SPI_DEVICE_POWER | SPI_BAUD_1MHz | SPI_CONTINUOUS;
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REG_SPIDATA = PM_AMP_OFFSET;
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SerialWaitBusy();
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REG_SPICNT = SPI_ENABLE | SPI_DEVICE_POWER | SPI_BAUD_1MHz;
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REG_SPIDATA = control;
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SerialWaitBusy();
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REG_SPICNT = SPI_ENABLE | SPI_DEVICE_POWER | SPI_BAUD_1MHz | SPI_CONTINUOUS;
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REG_SPIDATA = PM_GAIN_OFFSET;
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SerialWaitBusy();
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REG_SPICNT = SPI_ENABLE | SPI_DEVICE_POWER | SPI_BAUD_1MHz;
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REG_SPIDATA = gain;
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}
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//---------------------------------------------------------------------------------
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// Read a byte from the microphone. Code based on neimod's example.
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//---------------------------------------------------------------------------------
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u8 micReadData8_NTR() {
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//---------------------------------------------------------------------------------
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u16 result, result2;
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SerialWaitBusy();
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REG_SPICNT = SPI_ENABLE | SPI_DEVICE_MICROPHONE | SPI_BAUD_2MHz | SPI_CONTINUOUS;
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REG_SPIDATA = 0xEC; // Touchscreen command format for AUX
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SerialWaitBusy();
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REG_SPIDATA = 0x00;
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SerialWaitBusy();
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result = REG_SPIDATA;
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REG_SPICNT = SPI_ENABLE | SPI_DEVICE_TOUCH | SPI_BAUD_2MHz;
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REG_SPIDATA = 0x00;
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SerialWaitBusy();
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result2 = REG_SPIDATA;
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return (((result & 0x7F) << 1) | ((result2>>7)&1));
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}
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//---------------------------------------------------------------------------------
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// Read a short from the microphone. Code based on neimod's example.
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//---------------------------------------------------------------------------------
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u16 micReadData12_NTR() {
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//---------------------------------------------------------------------------------
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u16 result, result2;
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SerialWaitBusy();
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REG_SPICNT = SPI_ENABLE | SPI_DEVICE_MICROPHONE | SPI_BAUD_2MHz | SPI_CONTINUOUS;
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REG_SPIDATA = 0xE4; // Touchscreen command format for AUX, 12bit
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SerialWaitBusy();
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REG_SPIDATA = 0x00;
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SerialWaitBusy();
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result = REG_SPIDATA;
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REG_SPICNT = SPI_ENABLE | SPI_DEVICE_TOUCH | SPI_BAUD_2MHz;
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REG_SPIDATA = 0x00;
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SerialWaitBusy();
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result2 = REG_SPIDATA;
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return (((result & 0x7F) << 5) | ((result2>>3)&0x1F));
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}
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//---------------------------------------------------------------------------------
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void micSetAmp(u8 control, u8 gain) {
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//---------------------------------------------------------------------------------
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int oldIME = enterCriticalSection();
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if (cdcIsAvailable()) {
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micSetAmp_TWL(control, gain);
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} else {
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micSetAmp_NTR(control, gain);
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}
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leaveCriticalSection(oldIME);
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}
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//---------------------------------------------------------------------------------
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u8 micReadData8() {
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//---------------------------------------------------------------------------------
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u8 smp;
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int oldIME = enterCriticalSection();
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if (cdcIsAvailable()) {
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smp = micReadData16_TWL() >> 8;
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} else {
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smp = micReadData8_NTR();
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}
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leaveCriticalSection(oldIME);
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return smp;
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}
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//---------------------------------------------------------------------------------
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u16 micReadData12() {
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//---------------------------------------------------------------------------------
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u16 smp;
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int oldIME = enterCriticalSection();
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if (cdcIsAvailable()) {
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smp = micReadData16_TWL() >> 4;
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} else {
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smp = micReadData12_NTR();
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}
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leaveCriticalSection(oldIME);
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return smp;
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}
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static u8* microphone_front_buffer;
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static u8* microphone_back_buffer;
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static int microphone_buffer_length = 0;
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static int sampleCount = 0;
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static bool eightBit = true;
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static int micTimer = 0;
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static MIC_BUF_SWAP_CB swapCallback;
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//---------------------------------------------------------------------------------
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void micStartRecording(u8* buffer, int length, int freq, int timer, bool eightBitSample, MIC_BUF_SWAP_CB bufferSwapCallback ) {
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//---------------------------------------------------------------------------------
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microphone_front_buffer = buffer + length / 2;
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microphone_back_buffer = buffer;
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microphone_buffer_length = length / 2;
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swapCallback = bufferSwapCallback;
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sampleCount = 0;
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micTimer = timer;
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eightBit = eightBitSample;
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micOn();
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irqSet(BIT(3 + timer), micTimerHandler);
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irqEnable(BIT(3 + timer));
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// Setup a timer
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TIMER_DATA(timer) = TIMER_FREQ(freq);
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TIMER_CR(timer) = TIMER_ENABLE |TIMER_IRQ_REQ;
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//irqSet(IRQ_TIMER2, micTimerHandler);
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//irqEnable(IRQ_TIMER2);
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//// Setup a timer
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//TIMER_DATA(2) = TIMER_FREQ(freq);
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//TIMER_CR(2) = TIMER_ENABLE | TIMER_DIV_1 | TIMER_IRQ_REQ;
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}
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//---------------------------------------------------------------------------------
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int micStopRecording(void) {
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//---------------------------------------------------------------------------------
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TIMER_CR(micTimer) &= ~TIMER_ENABLE;
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micOff();
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if(swapCallback)
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swapCallback(microphone_back_buffer, eightBit ? sampleCount : (sampleCount << 1));
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microphone_front_buffer = microphone_back_buffer = 0;
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return sampleCount;
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}
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//---------------------------------------------------------------------------------
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void micTimerHandler(void) {
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//---------------------------------------------------------------------------------
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int len = 0;
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// Read data from the microphone. Data from the Mic is unsigned, flipping
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// the highest bit makes it signed.
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if(eightBit)
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{
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*(microphone_back_buffer+sampleCount) = micReadData8() ^ 0x80;
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}
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else
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{
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*(u16*)(microphone_back_buffer + sampleCount * 2) = (micReadData12() - 2048) << 4; // ^ 0x8000;
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}
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sampleCount++;
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len = eightBit ? sampleCount : (sampleCount << 1);
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if(len >= microphone_buffer_length)
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{
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sampleCount = 0;
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u8* temp = microphone_back_buffer;
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microphone_back_buffer = microphone_front_buffer;
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microphone_front_buffer = temp;
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if(swapCallback)
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swapCallback(microphone_front_buffer, microphone_buffer_length);
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}
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}
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