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ledmatrix.cpp small code sanitization

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This commit is contained in:
Verkehrsrot 2019-08-19 21:48:11 +02:00
parent 012bf545c4
commit 43cf6b7fe5
2 changed files with 5 additions and 4 deletions
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2
include/ledmatrixdisplay.h
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@ -13,6 +13,6 @@ void refreshTheMatrixDisplay(bool nextPage = false);
void DrawNumber(String strNum, uint8_t iDotPos = 0); void DrawNumber(String strNum, uint8_t iDotPos = 0);
uint8_t GetCharFromFont(char cChar); uint8_t GetCharFromFont(char cChar);
uint8_t GetCharWidth(char cChar); uint8_t GetCharWidth(char cChar);
void ScrollLeft(uint8_t *buf, uint16_t cols, uint16_t rows); void ScrollLeft(uint8_t *buf, const uint16_t cols, const uint16_t rows);
#endif #endif

7
src/ledmatrixdisplay.cpp
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@ -204,13 +204,14 @@ uint8_t GetCharWidth(char cChar) {
return CharDescriptor.width; return CharDescriptor.width;
} }
void ScrollLeft(uint8_t *buf, uint16_t cols, uint16_t rows) { void ScrollLeft(uint8_t *buf, const uint16_t cols, const uint16_t rows) {
uint32_t i, k, idx; uint32_t i, k, idx;
const uint32_t x = cols / 8;
for (k = 0; k < rows; k++) { for (k = 0; k < rows; k++) {
// scroll a line with x bytes one dot to the left // scroll a line with x bytes one dot to the left
for (i = 0; i < cols / 8 - 1; ++i) { for (i = 0; i < x - 1; ++i) {
idx = i + k * cols / 8; idx = i + k * x;
buf[idx] = (buf[idx] << 1) | ((buf[idx + 1] >> 7) & 1); buf[idx] = (buf[idx] << 1) | ((buf[idx + 1] >> 7) & 1);
} }
buf[idx + 1] <<= 1; buf[idx + 1] <<= 1;