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olivier.gi |
#include "gfx_controller.h"
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#include "timerA.h"
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//----------------------------------------------------------
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// Initialize Graphic controller
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//----------------------------------------------------------
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void init_gfx_ctrl (uint16_t gfx_mode, uint16_t refresh_rate) {
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// Local variable definition
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uint16_t kb_idx, b_idx;
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// Initialize frame buffer
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#ifndef VERILOG_SIMULATION
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VID_RAM0_ADDR = PIX_ADDR(0, 0);
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for( kb_idx = 0; kb_idx < FRAME_MEMORY_KB_SIZE/2; kb_idx = kb_idx + 1 ) {
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for( b_idx = 0; b_idx < 1024; b_idx = b_idx + 1 ) {
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VID_RAM0_DATA = 0x0000;
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}
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}
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#endif
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VID_RAM0_ADDR = PIX_ADDR(0, 0);
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// Configure Video mode
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GFX_CTRL = gfx_mode | GFX_REFR_START_IRQ_DIS | GFX_REFR_DONE_IRQ_DIS | GFX_GPU_EN;
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// Configure Refresh Rate
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LT24_REFRESH_SYNC = LT24_REFR_SYNC | 0x0000;
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LT24_REFRESH = refresh_rate;
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// Global configuration registers
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DISPLAY_WIDTH = SCREEN_WIDTH;
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DISPLAY_HEIGHT = SCREEN_HEIGHT;
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DISPLAY_SIZE = (uint32_t)SCREEN_WIDTH * (uint32_t)SCREEN_HEIGHT;
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#ifdef LT24_ROTATE
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DISPLAY_CFG = DISPLAY_NO_X_SWAP | DISPLAY_NO_Y_SWAP | DISPLAY_NO_CL_SWAP;
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#else
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DISPLAY_CFG = DISPLAY_NO_X_SWAP | DISPLAY_NO_Y_SWAP | DISPLAY_CL_SWAP;
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#endif
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// Initialize LT24 module
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init_lt24 (LT24_CLK_DIV2);
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}
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//----------------------------------------------------------
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// Start Graphic controller
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//----------------------------------------------------------
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void start_gfx_ctrl (void) {
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start_lt24();
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LT24_REFRESH = LT24_REFRESH | LT24_REFR_START;
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}
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//----------------------------------------------------------
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// Initialize LT24 controller
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//----------------------------------------------------------
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void init_lt24 (uint16_t lt24_clk_div) {
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// Enable LCD, generate a reset and set LCD clock
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LT24_CFG = 0x0000;
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ta_wait_no_lpm(WT_1MS);
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LT24_CFG = LT24_ON | lt24_clk_div | LT24_RESET;
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ta_wait_no_lpm(WT_1MS);
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LT24_CFG = LT24_ON | lt24_clk_div;
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ta_wait_no_lpm(WT_500MS+WT_20MS);
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// Set color mode to 16bits/pixel
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LT24_CMD = 0x003A | LT24_CMD_HAS_PARAM;
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LT24_CMD_PARAM = 0x0055;
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while((LT24_STATUS & LT24_STATUS_WAIT_PARAM)==0);
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LT24_CMD = 0x0000;
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// Define image rotation on the display
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// (MADCTL command: see pages 127 and 209 of the ILI9341 spec)
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#ifdef LT24_ROTATE
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LT24_CMD = 0x0036 | LT24_CMD_HAS_PARAM;
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LT24_CMD_PARAM = 0x0028;
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while((LT24_STATUS & LT24_STATUS_WAIT_PARAM)==0);
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LT24_CMD = 0x0000;
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#else
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LT24_CMD = 0x0036 | LT24_CMD_HAS_PARAM;
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LT24_CMD_PARAM = 0x0008;
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while((LT24_STATUS & LT24_STATUS_WAIT_PARAM)==0);
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LT24_CMD = 0x0000;
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#endif
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// Send CASET
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LT24_CMD = 0x002A | LT24_CMD_HAS_PARAM;
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LT24_CMD_PARAM = ( 0 & 0xFF00)>>8; // CASET_SC[15:8]
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while((LT24_STATUS & LT24_STATUS_WAIT_PARAM)==0);
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LT24_CMD_PARAM = ( 0 & 0x00FF); // CASET_SC[7:0]
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while((LT24_STATUS & LT24_STATUS_WAIT_PARAM)==0);
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#ifdef LT24_ROTATE
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LT24_CMD_PARAM = ( SCREEN_WIDTH & 0xFF00)>>8; // CASET_EC[15:8]
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#else
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LT24_CMD_PARAM = ( SCREEN_HEIGHT & 0xFF00)>>8; // CASET_EC[15:8]
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#endif
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while((LT24_STATUS & LT24_STATUS_WAIT_PARAM)==0);
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#ifdef LT24_ROTATE
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LT24_CMD_PARAM = ( SCREEN_WIDTH & 0x00FF); // CASET_EC[7:0]
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#else
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LT24_CMD_PARAM = ( SCREEN_HEIGHT & 0x00FF); // CASET_EC[7:0]
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#endif
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while((LT24_STATUS & LT24_STATUS_WAIT_PARAM)==0);
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LT24_CMD = 0x0000;
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// Send PASET
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LT24_CMD = 0x002B | LT24_CMD_HAS_PARAM;
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LT24_CMD_PARAM = ( 0 & 0xFF00)>>8; // PASET_SC[15:8]
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while((LT24_STATUS & LT24_STATUS_WAIT_PARAM)==0);
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LT24_CMD_PARAM = ( 0 & 0x00FF); // PASET_SC[7:0]
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while((LT24_STATUS & LT24_STATUS_WAIT_PARAM)==0);
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#ifdef LT24_ROTATE
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LT24_CMD_PARAM = ( SCREEN_HEIGHT & 0xFF00)>>8; // PASET_EC[15:8]
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#else
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LT24_CMD_PARAM = ( SCREEN_WIDTH & 0xFF00)>>8; // PASET_EC[15:8]
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#endif
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while((LT24_STATUS & LT24_STATUS_WAIT_PARAM)==0);
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#ifdef LT24_ROTATE
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LT24_CMD_PARAM = ( SCREEN_HEIGHT & 0x00FF); // PASET_EC[7:0]
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#else
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LT24_CMD_PARAM = ( SCREEN_WIDTH & 0x00FF); // PASET_EC[7:0]
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#endif
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while((LT24_STATUS & LT24_STATUS_WAIT_PARAM)==0);
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LT24_CMD = 0x0000;
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// Initialize the LT24 display memory
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#ifndef VERILOG_SIMULATION
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LT24_CMD_DFILL = 0x0000;
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while((LT24_STATUS & LT24_STATUS_DFILL_BUSY)!=0);
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#endif
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// Display on
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LT24_CMD = 0x0035 | LT24_CMD_NO_PARAM;
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LT24_CMD_PARAM = 0x0000;
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return;
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}
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//----------------------------------------------------------
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// Start LT24 controller
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//----------------------------------------------------------
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void start_lt24(void) {
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// Display on
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LT24_CMD = 0x0029 | LT24_CMD_NO_PARAM;
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LT24_CMD_PARAM = 0x0000;
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ta_wait_no_lpm(WT_10MS);
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// Go out of SLEEP
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LT24_CMD = 0x0011 | LT24_CMD_NO_PARAM;
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LT24_CMD_PARAM = 0x0000;
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ta_wait_no_lpm(WT_100MS);
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return;
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}
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//----------------------------------------------------------
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// Wait for the refresh to be done
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//----------------------------------------------------------
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void sync_screen_refresh_done(void) {
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// Clear IRQ flag
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GFX_IRQ |= GFX_IRQ_REFRESH_DONE;
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// Wait for flag to be set
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while((GFX_IRQ & GFX_IRQ_REFRESH_DONE)==0);
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return;
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}
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//----------------------------------------------------------
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// Wait for the refresh to start
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//----------------------------------------------------------
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void sync_screen_refresh_start(void) {
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// Clear IRQ flag
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GFX_IRQ |= GFX_IRQ_REFRESH_START;
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// Wait for flag to be set
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while((GFX_IRQ & GFX_IRQ_REFRESH_START)==0);
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return;
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}
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//==========================================================
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// GPU FUNCTIONS
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//==========================================================
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void gpu_fill (uint32_t addr, uint16_t width, uint16_t length, uint16_t color, uint16_t configuration) {
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while((GPU_STAT & GPU_STAT_FIFO_CNT_EMPTY)<7);
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GPU_CMD = GPU_REC_WIDTH | width;
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GPU_CMD = GPU_REC_HEIGHT | length;
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GPU_CMD = GPU_DST_PX_ADDR; GPU_CMD32 = addr;
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GPU_CMD = GPU_EXEC_FILL | configuration ;
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GPU_CMD = color;
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}
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void gpu_copy (uint32_t src_addr, uint32_t dst_addr, uint16_t width, uint16_t length, uint16_t configuration) {
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while((GPU_STAT & GPU_STAT_FIFO_CNT_EMPTY)<9);
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GPU_CMD = GPU_REC_WIDTH | width;
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GPU_CMD = GPU_REC_HEIGHT | length;
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GPU_CMD = GPU_DST_PX_ADDR; GPU_CMD32 = dst_addr;
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GPU_CMD = GPU_SRC_PX_ADDR; GPU_CMD32 = src_addr;
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GPU_CMD = GPU_EXEC_COPY | configuration ;
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}
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void gpu_copy_transparent (uint32_t src_addr, uint32_t dst_addr, uint16_t width, uint16_t length, uint16_t trans_color, uint16_t configuration) {
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while((GPU_STAT & GPU_STAT_FIFO_CNT_EMPTY)<9);
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GPU_CMD = GPU_REC_WIDTH | width;
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GPU_CMD = GPU_REC_HEIGHT | length;
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GPU_CMD = GPU_SET_TRANS; GPU_CMD = trans_color;
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GPU_CMD = GPU_DST_PX_ADDR; GPU_CMD32 = dst_addr;
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GPU_CMD = GPU_SRC_PX_ADDR; GPU_CMD32 = src_addr;
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GPU_CMD = GPU_EXEC_COPY_TRANS | configuration ;
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}
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inline void gpu_wait_done (void) {
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while((GPU_STAT & GPU_STAT_BUSY)!=0);
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}
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