120 lines
4.1 KiB
C
120 lines
4.1 KiB
C
#include "panel/oled_elw1501aa.h"
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#include "epd_private.h"
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static uint8_t elw1501aa_init_sequence[] = {
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0x01, 0x81, 0x9C, // Set contrast control
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0x01, 0xA0, 0x53, // Set segment re-map
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0x01, 0xA1, 0x00, // Set display start line
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0x01, 0xA2, 0x00, // Set display offset
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0x00, 0xA4, // Set normal display mode
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0x01, 0xA8, 0x7F, // Set MUX ratio
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0x01, 0xAB, 0x01, // Set enable internal VDD regulator mode
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0x01, 0xB1, 0x31, // Set phase length of phase 1, phase 2
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0x01, 0xB3, 0xF1, // Set ratio of dividing frequency & oscillation frequency
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0x00, 0xB9, // Set gray scale table
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0x01, 0xBC, 0x07, // Set pre-charge voltage
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0x01, 0xBE, 0x07, // Set voltage VCOMH
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0x02, 0x15, 0x00, 0x3F, // Set column address
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0x02, 0x75, 0x00, 0x7F, // Set row address
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};
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static epd_ret_t oled_elw1501aa_reset(oled_elw1501aa_t *oled) {
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if (oled->cb.reset_cb != NULL) {
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return oled->cb.reset_cb(oled->user_data);
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}
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return EPD_OK;
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}
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static epd_ret_t oled_elw1501aa_window(oled_elw1501aa_t *oled, epd_coord_t *coord) {
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if (coord->x_start % 2 != 0 || coord->x_end % 2 == 0) {
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return EPD_FAIL;
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}
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if (coord->x_end > 127 || coord->x_start > coord->x_end) {
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return EPD_FAIL;
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}
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if (coord->y_end > 127 || coord->y_start > coord->y_end) {
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return EPD_FAIL;
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}
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uint8_t col_start = coord->x_start / 2;
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uint8_t col_end = coord->x_end / 2;
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uint8_t col_cmd_buf[3] = {0x15, col_start, col_end};
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uint8_t row_cmd_buf[3] = {0x75, coord->y_start, coord->y_end};
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EPD_ERROR_CHECK(oled->cb.write_command_cb(oled->user_data, col_cmd_buf, 3));
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EPD_ERROR_CHECK(oled->cb.write_command_cb(oled->user_data, row_cmd_buf, 3));
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return EPD_OK;
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}
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static inline uint32_t oled_elw1501aa_data_size(epd_coord_t *coord) {
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return (coord->x_end - coord->x_start + 1) * (coord->y_end - coord->y_start + 1) / 2;
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}
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/**
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* @brief Initialize OLED panel
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* As OLEDs and LCDs need to be driven constantly, also with
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* less overhead and higher data rate, initialization sequence
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* are moved to this seperate function. Call this function before
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* sending framebuffer data.
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* @param oled pointer to oled_elw1501aa_t
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* @return epd_ret_t EPD_OK for success, EPD_FAIL for error.
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*/
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epd_ret_t oled_elw1501aa_init(oled_elw1501aa_t *oled) {
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EPD_ERROR_CHECK(oled_elw1501aa_reset(oled));
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EPD_ERROR_CHECK(epd_common_execute_sequence(&oled->cb, oled->user_data, elw1501aa_init_sequence,
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sizeof(elw1501aa_init_sequence)));
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EPD_ERROR_CHECK(oled_elw1501aa_power(oled, 1));
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return EPD_OK;
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}
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/**
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* @brief Upload frame buffer to screen.
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*
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* @param oled pointer to oled_elw1501aa_t
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* @param coord pointer to epd_coord_t, can be NULL to upload full frame.
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* @param data array pointer to new pixel data.
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* @return epd_ret_t EPD_OK for success, EPD_FAIL for error.
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*/
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epd_ret_t oled_elw1501aa_upload(oled_elw1501aa_t *oled, epd_coord_t *coord, uint8_t *data) {
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uint32_t data_size = 8192;
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if (coord != NULL) {
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EPD_ERROR_CHECK(oled_elw1501aa_window(oled, coord));
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data_size = oled_elw1501aa_data_size(coord);
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}
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EPD_ERROR_CHECK(oled->cb.write_data_cb(oled->user_data, data, data_size));
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if (coord != NULL) {
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epd_coord_t new_coord = {
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.x_start = 0,
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.x_end = 127,
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.y_start = 0,
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.y_end = 127,
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};
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EPD_ERROR_CHECK(oled_elw1501aa_window(oled, &new_coord));
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}
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return EPD_OK;
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}
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/**
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* @brief Control the OLED drivers.
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* LCDs and OLEDs needs to be constant driven in order to
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* display a stable image, turn the drivers and source/gate scan on or off.
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*
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* @param oled pointer to oled_elw1501aa_t
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* @param on 0:off, anything else: on
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* @return epd_ret_t EPD_OK for success, EPD_FAIL for error.
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*/
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epd_ret_t oled_elw1501aa_power(oled_elw1501aa_t *oled, uint8_t on) {
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uint8_t cmd[2] = {0xAE, 0x00};
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if (on) cmd[0] = 0xAF;
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EPD_ERROR_CHECK(oled->cb.write_command_cb(oled->user_data, cmd, 1));
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return EPD_OK;
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} |