diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/nds/libnds/source/arm7/microphone.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/nds/libnds/source/arm7/microphone.c | 113 |
1 files changed, 0 insertions, 113 deletions
diff --git a/c/src/lib/libbsp/arm/nds/libnds/source/arm7/microphone.c b/c/src/lib/libbsp/arm/nds/libnds/source/arm7/microphone.c deleted file mode 100644 index bec98fdc22..0000000000 --- a/c/src/lib/libbsp/arm/nds/libnds/source/arm7/microphone.c +++ /dev/null @@ -1,113 +0,0 @@ -/*--------------------------------------------------------------------------------- - Microphone control for the ARM7 - - Copyright (C) 2005 - Michael Noland (joat) - Jason Rogers (dovoto) - Dave Murphy (WinterMute) - Chris Double (doublec) - - This software is provided 'as-is', without any express or implied - warranty. In no event will the authors be held liable for any - damages arising from the use of this software. - - Permission is granted to anyone to use this software for any - purpose, including commercial applications, and to alter it and - redistribute it freely, subject to the following restrictions: - - 1. The origin of this software must not be misrepresented; you - must not claim that you wrote the original software. If you use - this software in a product, an acknowledgment in the product - documentation would be appreciated but is not required. - 2. Altered source versions must be plainly marked as such, and - must not be misrepresented as being the original software. - 3. This notice may not be removed or altered from any source - distribution. - ----------------------------------------------------------------------------------*/ -#include <nds/arm7/audio.h> -#include <nds/timers.h> - -//--------------------------------------------------------------------------------- -// Turn on the Microphone Amp. Code based on neimod's example. -//--------------------------------------------------------------------------------- -void PM_SetAmp(u8 control) { -//--------------------------------------------------------------------------------- - SerialWaitBusy(); - REG_SPICNT = SPI_ENABLE | SPI_DEVICE_POWER | SPI_BAUD_1MHz | SPI_CONTINUOUS; - REG_SPIDATA = PM_AMP_OFFSET; - - SerialWaitBusy(); - - REG_SPICNT = SPI_ENABLE | SPI_DEVICE_POWER | SPI_BAUD_1MHz; - REG_SPIDATA = control; -} - -//--------------------------------------------------------------------------------- -// Read a byte from the microphone. Code based on neimod's example. -//--------------------------------------------------------------------------------- -u8 MIC_ReadData() { -//--------------------------------------------------------------------------------- - u16 result, result2; - - SerialWaitBusy(); - - REG_SPICNT = SPI_ENABLE | SPI_DEVICE_MICROPHONE | SPI_BAUD_2MHz | SPI_CONTINUOUS; - REG_SPIDATA = 0xEC; // Touchscreen command format for AUX - - SerialWaitBusy(); - - REG_SPIDATA = 0x00; - - SerialWaitBusy(); - - result = REG_SPIDATA; - REG_SPICNT = SPI_ENABLE | SPI_DEVICE_TOUCH | SPI_BAUD_2MHz; - REG_SPIDATA = 0x00; - - SerialWaitBusy(); - - result2 = REG_SPIDATA; - - return (((result & 0x7F) << 1) | ((result2>>7)&1)); -} - -static u8* microphone_buffer = 0; -static int microphone_buffer_length = 0; -static int current_length = 0; - - -//--------------------------------------------------------------------------------- -void StartRecording(u8* buffer, int length) { -//--------------------------------------------------------------------------------- - microphone_buffer = buffer; - microphone_buffer_length = length; - current_length = 0; - - MIC_On(); - - // Setup a 16kHz timer - TIMER0_DATA = 0xF7CF; - TIMER0_CR = TIMER_ENABLE | TIMER_DIV_1 | TIMER_IRQ_REQ; -} - -//--------------------------------------------------------------------------------- -int StopRecording() { -//--------------------------------------------------------------------------------- - TIMER0_CR &= ~TIMER_ENABLE; - MIC_Off(); - microphone_buffer = 0; - return current_length; -} - -//--------------------------------------------------------------------------------- -void ProcessMicrophoneTimerIRQ() { -//--------------------------------------------------------------------------------- - if(microphone_buffer && microphone_buffer_length > 0) { - // Read data from the microphone. Data from the Mic is unsigned, flipping - // the highest bit makes it signed. - *microphone_buffer++ = MIC_ReadData() ^ 0x80; - --microphone_buffer_length; - current_length++; - } -} |