mirror of
https://github.com/armel/uv-k1-k5v3-firmware-custom.git
synced 2026-10-02 03:15:37 +00:00
103 lines
3.0 KiB
C
103 lines
3.0 KiB
C
/* Copyright 2024 Armel F4HWN
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* https://github.com/armel
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "debugging.h"
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#include "driver/st7565.h"
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#include "screenshot.h"
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void getScreenShot(bool force)
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{
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static uint8_t previousFrame[1024] = {0}; // Last frame sent
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static uint8_t forcedBlock = 0; // Block to force send each frame
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uint8_t currentFrame[1024];
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uint16_t index = 0;
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uint8_t acc = 0;
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uint8_t bitCount = 0;
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// Build current frame (status line: first 8 lines)
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for (uint8_t b = 0; b < 8; b++) {
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for (uint8_t i = 0; i < 128; i++) {
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uint8_t bit = (gStatusLine[i] >> b) & 0x01;
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acc |= (bit << bitCount++);
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if (bitCount == 8) {
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currentFrame[index++] = acc;
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acc = 0;
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bitCount = 0;
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}
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}
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}
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// Remaining framebuffer (7 blocks of 8 lines)
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for (uint8_t l = 0; l < 7; l++) {
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for (uint8_t b = 0; b < 8; b++) {
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for (uint8_t i = 0; i < 128; i++) {
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uint8_t bit = (gFrameBuffer[l][i] >> b) & 0x01;
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acc |= (bit << bitCount++);
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if (bitCount == 8) {
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currentFrame[index++] = acc;
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acc = 0;
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bitCount = 0;
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}
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}
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}
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}
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if (bitCount > 0) {
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currentFrame[index++] = acc;
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}
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if (index != 1024) {
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return; // Silent error
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}
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// Build delta frame
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uint8_t deltaFrame[128 * 9]; // Max: 1 byte index + 8 bytes data per block
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uint16_t deltaLen = 0;
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for (uint8_t block = 0; block < 128; block++) {
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uint8_t *cur = ¤tFrame[block * 8];
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uint8_t *prev = &previousFrame[block * 8];
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bool changed = memcmp(cur, prev, 8) != 0;
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bool isForced = (block == forcedBlock);
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bool fullRefresh = force;
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if (changed || isForced || fullRefresh) {
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deltaFrame[deltaLen++] = block;
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memcpy(&deltaFrame[deltaLen], cur, 8);
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deltaLen += 8;
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// Update previous frame
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memcpy(prev, cur, 8);
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}
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}
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// Always advance forced block pointer (even in full refresh mode)
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forcedBlock = (forcedBlock + 1) % 128;
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if (deltaLen == 0) {
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return; // Nothing to send
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}
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// Send delta frame
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uint8_t header[5] = {
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0xAA, 0x55, 0x02, (uint8_t)(deltaLen >> 8), (uint8_t)(deltaLen & 0xFF)
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};
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UART_Send(header, 5);
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UART_Send(deltaFrame, deltaLen);
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uint8_t end = 0x0A;
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UART_Send(&end, 1);
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} |