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SDL based host with extram mapped to framebuffer and simple gfx app to accompany it

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This commit is contained in:
Toby Jaffey 2025-12-11 23:31:10 +00:00
parent 577aaadacd
commit e7485d5972
8 changed files with 336 additions and 0 deletions
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13
apps/gfx/Makefile Normal file
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TOPDIR=../..
PROJECT:=$(shell basename ${PWD})
OPT=-Os
SRCS=${PROJECT}.c ${TOPDIR}/apps/crt0.S
HOST_EXTRA=-i 4294967295
all: all_common
test: all
${TOPDIR}/hosts/host-sdl/host-sdl ${HOST_EXTRA} ${PWD}/${PROJECT}.bin
clean: clean_common
include ${TOPDIR}/apps/makefile.common

22
apps/gfx/gfx.c Normal file
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#include "uvm32_target.h"
uint32_t *framebuffer = (uint32_t *)UVM32_EXTRAM_BASE;
#define WIDTH 800
#define HEIGHT 600
void main(void) {
uint32_t col = 0x000000FF;
uint8_t c = 0;
uint32_t framecount = 0;
while(1) {
for (int y=0;y<HEIGHT;y++) {
for (int x=0;x<WIDTH;x++) {
framebuffer[y*WIDTH+x] = col;
}
}
col = (c << 24) | (c << 16) | (c<<8) | 0xFF;
c++;
printdec(framecount++);
println("");
}
}