/* ---------------------------------------------------------------------------- */
/* Atmel Microcontroller Software Support */
/* SAM Software Package License */
/* ---------------------------------------------------------------------------- */
/* Copyright (c) 2015, Atmel Corporation */
/* */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following condition is met: */
/* */
/* - Redistributions of source code must retain the above copyright notice, */
/* this list of conditions and the disclaimer below. */
/* */
/* Atmel's name may not be used to endorse or promote products derived from */
/* this software without specific prior written permission. */
/* */
/* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR */
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/* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF */
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/* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
/* ---------------------------------------------------------------------------- */
/*----------------------------------------------------------------------------
* Headers
*----------------------------------------------------------------------------*/
#include "chip.h"
/*----------------------------------------------------------------------------
* Local functions
*----------------------------------------------------------------------------*/
/**
* \brief Workaround for ISI CFG2 register read.
* \note The ISI_CFG2[31:27] can be written correctly, because the input writing
* data are assigned directly to the internal control bits as specified,
* the mismatch only happens in reading operation.
* [31:28] are shift right 1 bit, so [31:27] can be read from [30:27].
*/
__STATIC_INLINE uint32_t _ISI_GetCFG2_Workaround(void)
{
uint32_t wrongfield;
wrongfield = ISI->ISI_CFG2 >> (ISI_CFG2_YCC_SWAP_Pos - 1);
return (ISI->ISI_CFG2 & 0x07FFFFFF) | (wrongfield << ISI_CFG2_YCC_SWAP_Pos);
}
/*----------------------------------------------------------------------------
* Export functions
*----------------------------------------------------------------------------*/
/**
* \brief Enable ISI
*/
void ISI_Enable(void)
{
ISI->ISI_CR |= ISI_CR_ISI_EN;
while ((ISI->ISI_SR & ISI_CR_ISI_EN) != ISI_CR_ISI_EN);
}
/**
* \brief Enable ISI Dma channel
* \param channel to be enabled
*/
void ISI_DmaChannelEnable(uint32_t channel)
{
ISI->ISI_DMA_CHER |= channel;
}
/**
* \brief Disable ISI Dma channel
* \param channel to be disabled
*/
void ISI_DmaChannelDisable(uint32_t channel)
{
ISI->ISI_DMA_CHDR |= channel;
}
/**
* \brief Disable ISI
*/
void ISI_Disable(void)
{
/* Write one to this field to disable the module */
ISI->ISI_CR |= ISI_CR_ISI_DIS;
/* Software must poll DIS_DONE field in the ISI_STATUS register to verify that the command
has successfully completed.*/
while ((ISI->ISI_SR & ISI_SR_DIS_DONE) != ISI_SR_DIS_DONE);
}
/**
* \brief Enable ISI interrupt
* \param flag of interrupt to enable
*/
void ISI_EnableInterrupt(uint32_t flag)
{
ISI->ISI_IER = flag;
}
/**
* \brief Disable ISI interrupt
* \param flag of interrupt to disable
*/
void ISI_DisableInterrupt(uint32_t flag)
{
ISI->ISI_IDR = flag;
}
/**
* \brief Return ISI status register
* \return Status of ISI register
*/
uint32_t ISI_StatusRegister(void)
{
return (ISI->ISI_SR);
}
/**
* \brief Enable Codec path for capture next frame
*/
void ISI_CodecPathFull(void)
{
// The codec path is enabled and the next frame is captured.
// Both codec and preview data-paths are working simultaneously
ISI->ISI_CR |= ISI_CR_ISI_CDC;
ISI->ISI_CFG1 |= ISI_CFG1_FULL;
}
/**
* \brief Set frame rate
* \param frame frame rate capture
*/
void ISI_SetFrameRate(uint32_t frame)
{
if (frame > 7) {
TRACE_ERROR("rate too big\n\r");
frame = 7;
}
ISI->ISI_CFG1 |= ISI_CFG1_FRATE(frame);
}
/**
* \brief Get the number of byte per pixels
* \param bmpRgb BMP type can be YUV or RGB
*/
uint8_t ISI_BytesForOnePixel(uint8_t bmpRgb)
{
uint8_t nbByte_Pixel;
if (bmpRgb == RGB) {
if ((_ISI_GetCFG2_Workaround() & ISI_CFG2_RGB_MODE) == ISI_CFG2_RGB_MODE) {
// RGB: 5:6:5 16bits/pixels
nbByte_Pixel = 2;
} else {
// RGB: 8:8:8 24bits/pixels
nbByte_Pixel = 3;
}
} else {
// YUV: 2 pixels for 4 bytes
nbByte_Pixel = 2;
}
return nbByte_Pixel;
}
/**
* \brief Reset ISI
*/
void ISI_Reset(void)
{
uint32_t timeout = 0;
// Resets the image sensor interface.
// Finish capturing the current frame and then shut down the module.
ISI->ISI_CR = ISI_CR_ISI_SRST | ISI_CR_ISI_DIS;
// wait Software reset has completed successfully.
while ((!(ISI->ISI_SR & ISI_SR_SRST))
&& (timeout < 0x5000))
timeout++;
if (timeout == 0x5000)
TRACE_ERROR("ISI-Reset timeout\n\r");
}
/**
* \brief Set the windows blank
* \param hBlank pixel clock periods to wait before the beginning of a line.
* \param vBlank lines are skipped at the beginning of the frame.
*/
void ISI_SetBlank(uint8_t hBlank, uint8_t vBlank)
{
ISI->ISI_CFG1 |= ISI_CFG1_SLD(hBlank) + ISI_CFG1_SFD(vBlank);
}
/**
* \brief Set vertical and horizontal Size of the Image Sensor
* \param hSize Horizontal size of the Image sensor [0..2047].
* \param vSize Vertical size of the Image sensor [0..2047].
*/
void ISI_SetSensorSize(uint32_t hSize, uint32_t vSize)
{
uint32_t val;
val = _ISI_GetCFG2_Workaround();
val &= (~ISI_CFG2_IM_VSIZE_Msk);
val &= (~ISI_CFG2_IM_HSIZE_Msk);
// IM_VSIZE: Vertical size of the Image sensor [0..2047]
// Vertical size = IM_VSIZE + 1
// IM_HSIZE: Horizontal size of the Image sensor [0..2047]
// Horizontal size = IM_HSIZE + 1
ISI->ISI_CFG2 &= (~ISI_CFG2_IM_VSIZE_Msk);
ISI->ISI_CFG2 &= (~ISI_CFG2_IM_HSIZE_Msk);
ISI->ISI_CFG2 = val | ISI_CFG2_IM_VSIZE(vSize - 1) | ISI_CFG2_IM_HSIZE(
hSize - 1);
}
/**
* \brief Defines RGB pattern when RGB_MODE is set to 1.
* \param wRgbPixelMapping RGB pattern
*/
void ISI_RgbPixelMapping(uint32_t wRgbPixelMapping)
{
ISI->ISI_CFG2 = _ISI_GetCFG2_Workaround() & (~ISI_CFG2_RGB_CFG_Msk);
if (wRgbPixelMapping != ISI_CFG2_RGB_CFG_DEFAULT)
ISI->ISI_CFG2 = _ISI_GetCFG2_Workaround() | wRgbPixelMapping
| ISI_CFG2_RGB_MODE;
else
ISI->ISI_CFG2 = _ISI_GetCFG2_Workaround();
}
/**
* \brief Enables RGB swap
* \param swapMode 0: D7-R7, 1: D0-R7
*/
void ISI_RgbSwapMode(uint32_t swapMode)
{
ISI->ISI_CFG2 = _ISI_GetCFG2_Workaround() & (~ISI_CFG2_RGB_SWAP);
if (swapMode) ISI->ISI_CFG2 = _ISI_GetCFG2_Workaround() | ISI_CFG2_RGB_SWAP;
}
/**
* \brief Defines YCrCb swap format.
* \param wYuvSwapMode YUV Swap format
*/
void ISI_YCrCbFormat(uint32_t wYuvSwapMode)
{
ISI->ISI_CFG2 = _ISI_GetCFG2_Workaround() & (~ISI_CFG2_YCC_SWAP_Msk);
ISI->ISI_CFG2 = _ISI_GetCFG2_Workaround() | wYuvSwapMode;
}
/**
* \brief Input image is assumed to be grayscale-coded.
* \param wPixelFormat 0: 2 pixels per word, 1:1 pixel per word.
*/
void ISI_setGrayScaleMode(uint32_t wPixelFormat)
{
ISI->ISI_CFG2 = _ISI_GetCFG2_Workaround() | ISI_CFG2_GRAYSCALE;
if (wPixelFormat) ISI->ISI_CFG2 = _ISI_GetCFG2_Workaround() | ISI_CFG2_GS_MODE;
}
/**
* \brief Set data stream format.
* \param wStreamMode 0: YUV input, 1: RGB 8:8:8/5:6:5 input
*/
void ISI_setInputStream(uint32_t wStreamMode)
{
ISI->ISI_CFG2 = _ISI_GetCFG2_Workaround() & (~ISI_CFG2_COL_SPACE);
if (wStreamMode) ISI->ISI_CFG2 = _ISI_GetCFG2_Workaround() | ISI_CFG2_COL_SPACE;
}
/**
* \brief Set preview size.
* \param hSize Horizontal Preview size (640 max only in RGB mode).
* \param vSize Vertical Preview size (480 max only in RGB mode).
*/
void ISI_setPreviewSize(uint32_t hSize, uint32_t vSize)
{
if (hSize > 640) hSize = 640;
if (vSize > 480) vSize = 480;
ISI->ISI_PSIZE = ISI_PSIZE_PREV_VSIZE(vSize - 1) | ISI_PSIZE_PREV_HSIZE(
hSize - 1);
}
/**
* \brief calculate scaler factor automatically.
* \note The sensor size and preview size for LCD was configured before this setting.
*/
void ISI_calcScalerFactor(void)
{
uint32_t hLcdSize, hSensorSize;
uint32_t hRatio;
hLcdSize = ((ISI->ISI_PSIZE & ISI_PSIZE_PREV_HSIZE_Msk) >>
ISI_PSIZE_PREV_HSIZE_Pos) + 1;
hSensorSize = ((_ISI_GetCFG2_Workaround() & ISI_CFG2_IM_HSIZE_Msk)
>> ISI_CFG2_IM_HSIZE_Pos) + 1;
hRatio = 1600 * hSensorSize / hLcdSize;
ISI->ISI_PDECF = (hRatio / 100);
}
/**
* \brief Configure DMA for preview path.
* \param baseFrameBufDesc Preview Descriptor Address.
* \param dmaCtrl DMA Preview Control.
* \param frameBufferStartAddr DMA Preview Base Address.
*/
void ISI_setDmaInPreviewPath(uint32_t baseFrameBufDesc,
uint32_t dmaCtrl, uint32_t frameBufferStartAddr)
{
ISI->ISI_DMA_P_DSCR = baseFrameBufDesc;
ISI->ISI_DMA_P_CTRL = dmaCtrl;
ISI->ISI_DMA_P_ADDR = frameBufferStartAddr;
}
/**
* \brief Configure DMA for Codec path.
* \param baseFrameBufDesc Preview Descriptor Address.
* \param dmaCtrl DMA Preview Control.
* \param frameBufferStartAddr DMA Preview Base Address.
*/
void ISI_setDmaInCodecPath(uint32_t baseFrameBufDesc,
uint32_t dmaCtrl, uint32_t frameBufferStartAddr)
{
ISI->ISI_DMA_C_DSCR = baseFrameBufDesc;
ISI->ISI_DMA_C_CTRL = dmaCtrl;
ISI->ISI_DMA_C_ADDR = frameBufferStartAddr;
}
/**
* \brief ISI set matrix for YUV to RGB color space for preview path.
* \param yuv2rgb structure of YUV to RBG parameters.
*/
void ISI_SetMatrix4Yuv2Rgb (ISI_Y2R *yuv2rgb)
{
ISI->ISI_Y2R_SET0 = ISI_Y2R_SET0_C0(yuv2rgb->C0)
| ISI_Y2R_SET0_C1(yuv2rgb->C1)
| ISI_Y2R_SET0_C2(yuv2rgb->C2)
| ISI_Y2R_SET0_C3(yuv2rgb->C3);
ISI->ISI_Y2R_SET1 = ISI_Y2R_SET1_C4(yuv2rgb->C4)
| ((yuv2rgb->Yoff == 1) ? ISI_Y2R_SET1_Yoff : 0)
| ((yuv2rgb->Croff == 1) ? ISI_Y2R_SET1_Croff : 0)
| ((yuv2rgb->Cboff == 1) ? ISI_Y2R_SET1_Cboff : 0);
}
/**
* \brief ISI set matrix for RGB to YUV color space for codec path.
* \param rgb2yuv structure of RGB to YUV parameters.
*/
void ISI_SetMatrix4Rgb2Yuv (ISI_R2Y *rgb2yuv)
{
ISI->ISI_R2Y_SET0 = ISI_R2Y_SET0_C0(rgb2yuv->C0)
| ISI_R2Y_SET0_C1(rgb2yuv->C1)
| ISI_R2Y_SET0_C2(rgb2yuv->C2)
| ((rgb2yuv->Roff == 1) ? ISI_R2Y_SET0_Roff : 0);
ISI->ISI_R2Y_SET1 = ISI_R2Y_SET1_C3(rgb2yuv->C3)
| ISI_R2Y_SET1_C4(rgb2yuv->C4)
| ISI_R2Y_SET1_C5(rgb2yuv->C5)
| ((rgb2yuv->Goff == 1) ? ISI_R2Y_SET1_Goff : 0);
ISI->ISI_R2Y_SET2 = ISI_R2Y_SET2_C6(rgb2yuv->C6)
| ISI_R2Y_SET2_C7(rgb2yuv->C7)
| ISI_R2Y_SET2_C8(rgb2yuv->C8)
| ((rgb2yuv->Boff == 1) ? ISI_R2Y_SET2_Boff : 0);
}
