Fiddle with brightness
Add new function setBrightness() #366 Takes a value of 0-255
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mrfaptastic
parent
765d99ea63
commit
9ca210d3ac
2 changed files with 166 additions and 26 deletions
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@ -567,7 +567,8 @@ void MatrixPanel_I2S_DMA::clearFrameBuffer(bool _buff_id){
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#endif
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*/
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row[ESP32_TX_FIFO_POSITION_ADJUST(0 + _blank)] |= BIT_OE;
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row[ESP32_TX_FIFO_POSITION_ADJUST(0 + _blank)] |= BIT_OE; // disable output
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row[ESP32_TX_FIFO_POSITION_ADJUST(dma_buff.rowBits[row_idx]->width - 1)] |= BIT_OE; // disable output
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row[ESP32_TX_FIFO_POSITION_ADJUST(dma_buff.rowBits[row_idx]->width - _blank - 1)] |= BIT_OE; // (LAT pulse is (width-2) -1 pixel to compensate array index starting at 0
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@ -591,6 +592,7 @@ void MatrixPanel_I2S_DMA::clearFrameBuffer(bool _buff_id){
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* @param _buff_id - buffer id to control
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*/
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void MatrixPanel_I2S_DMA::brtCtrlOE(int brt, const bool _buff_id){
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/*
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if (!initialized)
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return;
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@ -643,16 +645,7 @@ void MatrixPanel_I2S_DMA::brtCtrlOE(int brt, const bool _buff_id){
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uint8_t _blank = m_cfg.latch_blanking;
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do {
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--_blank;
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/*
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#if defined(ESP32_THE_ORIG)
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// Original ESP32 WROOM FIFO Ordering Sucks
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uint8_t _blank_row_tx_fifo_tmp = 0 + _blank;
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(_blank_row_tx_fifo_tmp & 1U) ? --_blank_row_tx_fifo_tmp : ++_blank_row_tx_fifo_tmp;
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row[_blank_row_tx_fifo_tmp] |= BIT_OE;
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#else
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row[0 + _blank] |= BIT_OE;
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#endif
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*/
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row[ESP32_TX_FIFO_POSITION_ADJUST(0 + _blank)] |= BIT_OE;
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@ -673,6 +666,104 @@ void MatrixPanel_I2S_DMA::brtCtrlOE(int brt, const bool _buff_id){
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} while(row_idx);
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*/
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}
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/**
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* @brief - reset OE bits in DMA buffer in a way to control brightness
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* @param brt - brightness level from 0 to 255 - NOT MATRIX_WIDTH
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* @param _buff_id - buffer id to control
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*/
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void MatrixPanel_I2S_DMA::brtCtrlOEv2(uint8_t brt, const int _buff_id) {
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if (!initialized)
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return;
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/*
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int x_coord_oe_adjust_stop_point = PIXELS_PER_ROW -
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if (brt > PIXELS_PER_ROW - (MAX_LAT_BLANKING + 2)) // can't control values larger than (row_width - latch_blanking) to avoid ongoing issues being raised about brightness and ghosting.
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brt = PIXELS_PER_ROW - (MAX_LAT_BLANKING + 2); // +2 for a bit of buffer...
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if (brt < 0)
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brt = 0;
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*/
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int brightness_in_x_pixels = PIXELS_PER_ROW * ((float)brt/256);
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Serial.println(brightness_in_x_pixels, DEC);
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uint8_t _blank = m_cfg.latch_blanking; // don't want to inadvertantly blast over this
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// start with iterating all rows in dma_buff structure
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int row_idx = dma_buff.rowBits.size();
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do {
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--row_idx;
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// let's set OE control bits for specific pixels in each color_index subrows
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uint8_t colouridx = dma_buff.rowBits[row_idx]->colour_depth;
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do {
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--colouridx;
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// switch pointer to a row for a specific color index
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ESP32_I2S_DMA_STORAGE_TYPE* row = dma_buff.rowBits[row_idx]->getDataPtr(colouridx, _buff_id);
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int x_coord = dma_buff.rowBits[row_idx]->width;
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do {
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--x_coord;
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if (x_coord <= _blank) // Can't touch blanking. They need to stay blank.
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{
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row[ESP32_TX_FIFO_POSITION_ADJUST(x_coord)] |= BIT_OE; // Disable output after this point.
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}
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else if(x_coord >= (PIXELS_PER_ROW - _blank - 1) ) // Can't touch blanking. They need to stay blank.
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{
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row[ESP32_TX_FIFO_POSITION_ADJUST(x_coord)] |= BIT_OE; // Disable output after this point.
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}
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else if (x_coord < brightness_in_x_pixels)
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{
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row[ESP32_TX_FIFO_POSITION_ADJUST(x_coord)] &= BITMASK_OE_CLEAR;
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}
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else
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{
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row[ESP32_TX_FIFO_POSITION_ADJUST(x_coord)] |= BIT_OE; // Disable output after this point.
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}
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// clear OE bit for all other pixels (that is, turn on output)
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//row[ESP32_TX_FIFO_POSITION_ADJUST(x_coord)] &= BITMASK_OE_CLEAR;
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/*
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// Brightness control via OE toggle - disable matrix output at specified x_coord
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if((colouridx > lsbMsbTransitionBit || !colouridx) && ((x_coord) >= brt)){
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row[ESP32_TX_FIFO_POSITION_ADJUST(x_coord)] |= BIT_OE; // Disable output after this point.
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continue;
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}
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// special case for the bits *after* LSB through (lsbMsbTransitionBit) - OE is output after data is shifted, so need to set OE to fractional brightness
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if(colouridx && colouridx <= lsbMsbTransitionBit) {
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// divide brightness in half for each bit below lsbMsbTransitionBit
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int lsbBrightness = brt >> (lsbMsbTransitionBit - colouridx + 1);
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if((x_coord) >= lsbBrightness) {
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row[ESP32_TX_FIFO_POSITION_ADJUST(x_coord)] |= BIT_OE; // Disable output after this point.
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continue;
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}
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}
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*/
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} while(x_coord);
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} while(colouridx);
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// switch pointer to a row for a specific color index
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#if defined(SPIRAM_DMA_BUFFER)
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ESP32_I2S_DMA_STORAGE_TYPE* row_hack = dma_buff.rowBits[row_idx]->getDataPtr(colouridx, _buff_id);
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Cache_WriteBack_Addr((uint32_t)row_hack, sizeof(ESP32_I2S_DMA_STORAGE_TYPE) * ((dma_buff.rowBits[row_idx]->width * dma_buff.rowBits[row_idx]->colour_depth)-1)) ;
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#endif
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} while(row_idx);
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}
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@ -712,7 +803,9 @@ uint8_t MatrixPanel_I2S_DMA::setLatBlanking(uint8_t pulses){
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pulses = DEFAULT_LAT_BLANKING;
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m_cfg.latch_blanking = pulses;
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setPanelBrightness(brightness); // set brightness to reset OE bits to the values matching new LAT blanking setting
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// remove brightness var for now.
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//setPanelBrightness(brightness); // set brightness to reset OE bits to the values matching new LAT blanking setting
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return m_cfg.latch_blanking;
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}
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@ -720,8 +813,8 @@ uint8_t MatrixPanel_I2S_DMA::setLatBlanking(uint8_t pulses){
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#ifndef NO_FAST_FUNCTIONS
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/**
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* @brief - update DMA buff drawing horizontal line at specified coordinates
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* @param x_ccord - line start coordinate x
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* @param y_ccord - line start coordinate y
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* @param x_coord - line start coordinate x
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* @param y_coord - line start coordinate y
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* @param l - line length
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* @param r,g,b, - RGB888 color
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*/
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@ -807,8 +900,8 @@ void MatrixPanel_I2S_DMA::hlineDMA(int16_t x_coord, int16_t y_coord, int16_t l,
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/**
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* @brief - update DMA buff drawing vertical line at specified coordinates
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* @param x_ccord - line start coordinate x
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* @param y_ccord - line start coordinate y
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* @param x_coord - line start coordinate x
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* @param y_coord - line start coordinate y
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* @param l - line length
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* @param r,g,b, - RGB888 color
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*/
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@ -490,17 +490,53 @@ class MatrixPanel_I2S_DMA {
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}
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inline void setPanelBrightness(int b)
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/**
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* this is just a wrapper to control brightness
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* with an 8-bit value (0-255), very popular in FastLED-based sketches :)
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* @param uint8_t b - 8-bit brightness value
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*/
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void setBrightness(const uint8_t b)
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{
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// Change to set the brightness of the display, range of 1 to matrixWidth (i.e. 1 - 64)
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brightness = b;
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if (!initialized)
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{
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ESP_LOGI("setBrightness()", "Tried to set output brightness before begin()");
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return;
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}
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brightness = b;
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brtCtrlOEv2(b, 0);
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if (m_cfg.double_buff) {
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brtCtrlOEv2(b, 1);
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}
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}
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// Takes a value that is between 0 and MATRIX_WIDTH-1
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/*
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void setPanelBrightness(int b)
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{
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if (!initialized)
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{
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ESP_LOGI("setPanelBrightness()", "Tried to set output brightness before begin()");
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return;
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}
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// Change to set the brightness of the display, range of 1 to matrixWidth (i.e. 1 - 64)
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// brightness = b * PIXELS_PER_ROW / 256;
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brtCtrlOE(b);
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if (m_cfg.double_buff)
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brtCtrlOE(b, 1);
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}
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*/
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// Takes a value between 0-255 now.
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void setPanelBrightness(uint8_t b)
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{
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setBrightness(b);
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}
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/**
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* this is just a wrapper to control brightness
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@ -509,7 +545,8 @@ class MatrixPanel_I2S_DMA {
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*/
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void setBrightness8(const uint8_t b)
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{
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setPanelBrightness(b * PIXELS_PER_ROW / 256);
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setBrightness(b);
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//setPanelBrightness(b * PIXELS_PER_ROW / 256);
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}
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/**
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@ -580,11 +617,14 @@ class MatrixPanel_I2S_DMA {
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*/
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inline void resetbuffers(){
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clearFrameBuffer();
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brtCtrlOE(brightness);
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brtCtrlOEv2(brightness, 0);
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if (m_cfg.double_buff){
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clearFrameBuffer(1);
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brtCtrlOE(brightness, 1);
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brtCtrlOEv2(brightness, 1);
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}
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}
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@ -635,7 +675,7 @@ class MatrixPanel_I2S_DMA {
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bool initialized = false;
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int active_gfx_writes = 0; // How many async routines are 'drawing' (writing) to the DMA bit buffer. Function called from Adafruit_GFX draw routines like drawCircle etc.
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int back_buffer_id = 0; // If using double buffer, which one is NOT active (ie. being displayed) to write too?
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int brightness = 32; // If you get ghosting... reduce brightness level. 60 seems to be the limit before ghosting on a 64 pixel wide physical panel for some panels.
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int brightness = 128; // If you get ghosting... reduce brightness level. ((60/64)*255) seems to be the limit before ghosting on a 64 pixel wide physical panel for some panels.
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int lsbMsbTransitionBit = 0; // For colour depth calculations
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@ -680,6 +720,13 @@ class MatrixPanel_I2S_DMA {
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*/
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void brtCtrlOE(int brt, const bool _buff_id=0);
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/**
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* @brief - reset OE bits in DMA buffer in a way to control brightness
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* @param brt - brightness level from 0 to row_width
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* @param _buff_id - buffer id to control
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*/
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void brtCtrlOEv2(uint8_t brt, const int _buff_id=0);
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