varl/qmk_firmware
1
0
Fork 0
forked from forks/qmk_firmware
Code Pull requests Activity

Fix overrun in st7565_write_raw when not at (0, 0) (#13209)

Browse source
This commit is contained in:
Jonathan Rascher 2021-06-16 00:30:27 -05:00 committed by GitHub
parent f8d0ea9206
commit d59f8d1c02
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 3 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
drivers/lcd/st7565.c
View file

@ -336,8 +336,9 @@ void st7565_write_raw(const char *data, uint16_t size) {
uint16_t cursor_start_index = st7565_cursor - &st7565_buffer[0];
if ((size + cursor_start_index) > ST7565_MATRIX_SIZE) size = ST7565_MATRIX_SIZE - cursor_start_index;
for (uint16_t i = cursor_start_index; i < cursor_start_index + size; i++) {
if (st7565_buffer[i] == data[i]) continue;
st7565_buffer[i] = data[i];
uint8_t c = *data++;
if (st7565_buffer[i] == c) continue;
st7565_buffer[i] = c;
st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << (i / ST7565_BLOCK_SIZE));
}
}