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Add a method to read the OLED display buffer from user space (#8777)

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* Adding extern and declaration

* Change to mediated buffer read

* Adding raw byte read

* Restore write raw... D'Oh

* Working struct return

* Pack that struct

* Remove conditional packing and add example to docs

* Cleanup tab/spaces

* Update docs/feature_oled_driver.md

Prettify formatting

* Update drivers/oled/oled_driver.h

Prettify formatting
This commit is contained in:
Richard 2020-08-24 07:40:45 -07:00 • committed by James Young
parent 92385b3fb6
commit fa6cf85727
3 changed files with 58 additions and 0 deletions
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8
drivers/oled/oled_driver.c
View file

@ -444,6 +444,14 @@ void oled_pan(bool left) {
oled_dirty = ~((OLED_BLOCK_TYPE)0);
}
oled_buffer_reader_t oled_read_raw(uint16_t start_index) {
if (start_index > OLED_MATRIX_SIZE) start_index = OLED_MATRIX_SIZE;
oled_buffer_reader_t ret_reader;
ret_reader.current_element = &oled_buffer[start_index];
ret_reader.remaining_element_count = OLED_MATRIX_SIZE - start_index;
return ret_reader;
}
void oled_write_raw_byte(const char data, uint16_t index) {
if (index > OLED_MATRIX_SIZE) index = OLED_MATRIX_SIZE;
if (oled_buffer[index] == data) return;

9
drivers/oled/oled_driver.h
View file

@ -154,6 +154,11 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
# define OLED_I2C_TIMEOUT 100
#endif
typedef struct __attribute__((__packed__)) {
uint8_t *current_element;
uint16_t remaining_element_count;
} oled_buffer_reader_t;
// OLED Rotation enum values are flags
typedef enum {
OLED_ROTATION_0 = 0,
@ -207,6 +212,10 @@ void oled_write_ln(const char *data, bool invert);
// Pans the buffer to the right (or left by passing true) by moving contents of the buffer
void oled_pan(bool left);
// Returns a pointer to the requested start index in the buffer plus remaining
// buffer length as struct
oled_buffer_reader_t oled_read_raw(uint16_t start_index);
void oled_write_raw(const char *data, uint16_t size);
void oled_write_raw_byte(const char data, uint16_t index);