Fix overrun in st7565_write_raw when not at (0, 0) (#13209)
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1 changed files with 3 additions and 2 deletions
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@ -336,8 +336,9 @@ void st7565_write_raw(const char *data, uint16_t size) {
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uint16_t cursor_start_index = st7565_cursor - &st7565_buffer[0];
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if ((size + cursor_start_index) > ST7565_MATRIX_SIZE) size = ST7565_MATRIX_SIZE - cursor_start_index;
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for (uint16_t i = cursor_start_index; i < cursor_start_index + size; i++) {
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if (st7565_buffer[i] == data[i]) continue;
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st7565_buffer[i] = data[i];
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uint8_t c = *data++;
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if (st7565_buffer[i] == c) continue;
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st7565_buffer[i] = c;
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st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << (i / ST7565_BLOCK_SIZE));
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}
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}
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