From e4d597c5bfa88e352c571e966c910e8edcc2f0cd Mon Sep 17 00:00:00 2001
From: imi415 <imi415.public@gmail.com>
Date: Fri, 21 Jan 2022 22:43:33 +0800
Subject: [PATCH] Added ELW1501AA OLED driver.

---
 CMakeLists.txt                 |  1 +
 include/oled_panel_elw1501aa.h | 15 +++++++++
 src/oled_panel_elw1501aa.c     | 57 ++++++++++++++++++++++++++++++++++
 3 files changed, 73 insertions(+)
 create mode 100644 include/oled_panel_elw1501aa.h
 create mode 100644 src/oled_panel_elw1501aa.c

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 668462f..081adba 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,6 +6,7 @@ set(EPD_SOURCES
     "src/epd_common.c"
     "src/epd_panel_wfh0420cz35.c"
     "src/epd_panel_gdew042t2.c"
+    "src/oled_panel_elw1501aa.c"
 )
 
 set(EPD_INCLUDES
diff --git a/include/oled_panel_elw1501aa.h b/include/oled_panel_elw1501aa.h
new file mode 100644
index 0000000..a7f8ec5
--- /dev/null
+++ b/include/oled_panel_elw1501aa.h
@@ -0,0 +1,15 @@
+#ifndef OLED_PANEL_EWL1501AA_H
+#define OLED_PANEL_EWL1501AA_H
+
+#include "epd_common.h"
+
+typedef struct {
+    epd_cb_t cb;
+    void *user_data;
+} oled_ewl1501aa_t;
+
+epd_ret_t oled_ewl1501aa_init(oled_ewl1501aa_t *ewl);
+epd_ret_t oled_ewl1501aa_upload(oled_ewl1501aa_t *ewl, uint8_t *data);
+epd_ret_t oled_ewl1501aa_power(oled_ewl1501aa_t *ewl, uint8_t on);
+
+#endif
\ No newline at end of file
diff --git a/src/oled_panel_elw1501aa.c b/src/oled_panel_elw1501aa.c
new file mode 100644
index 0000000..039afb2
--- /dev/null
+++ b/src/oled_panel_elw1501aa.c
@@ -0,0 +1,57 @@
+#include "oled_panel_elw1501aa.h"
+
+#include "epd_private.h"
+
+static uint8_t ewl1501aa_init_sequence[] = {
+    0x01, 0x81, 0x9C,        // Set contrast control
+    0x01, 0xA0, 0x53,        // Set segment re-map
+    0x01, 0xA1, 0x00,        // Set display start line
+    0x01, 0xA2, 0x00,        // Set display offset
+    0x00, 0xA4,              // Set normal display mode
+    0x01, 0xA8, 0x7F,        // Set MUX ratio
+    0x01, 0xAB, 0x01,        // Set enable internal VDD regulator mode
+    0x01, 0xB1, 0x31,        // Set phase length of phase 1, phase 2
+    0x01, 0xB3, 0xF1,        // Set ratio of dividing frequency & oscillation frequency
+    0x00, 0xB9,              // Set gray scale table
+    0x01, 0xBC, 0x07,        // Set pre-charge voltage
+    0x01, 0xBE, 0x07,        // Set voltage VCOMH
+    0x02, 0x15, 0x00, 0x3F,  // Set column address
+    0x02, 0x75, 0x00, 0x7F,  // Set row address
+};
+
+static epd_ret_t oled_ewl1501aa_reset(oled_ewl1501aa_t *oled) {
+    if (oled->cb.reset_cb != NULL) {
+        return oled->cb.reset_cb(oled->user_data);
+    }
+
+    return EPD_OK;
+}
+
+epd_ret_t oled_ewl1501aa_init(oled_ewl1501aa_t *oled) {
+    EPD_ERROR_CHECK(oled_ewl1501aa_reset(oled));
+    EPD_ERROR_CHECK(epd_common_execute_sequence(&oled->cb, oled->user_data, ewl1501aa_init_sequence,
+                                                sizeof(ewl1501aa_init_sequence)));
+
+    return EPD_OK;
+}
+
+static epd_ret_t oled_ewl1501aa_window(oled_ewl1501aa_t *oled, epd_coord_t *coord) {
+    if (coord->x_start % 2 != 0 || coord->x_end % 2 == 0) {
+        return EPD_FAIL;
+    }
+
+    return EPD_OK;
+}
+
+epd_ret_t oled_ewl1501aa_upload(oled_ewl1501aa_t *ewl, uint8_t *data) {
+    EPD_ERROR_CHECK(ewl->cb.write_data_cb(ewl->user_data, data, 8192));
+    return EPD_OK;
+}
+
+epd_ret_t oled_ewl1501aa_power(oled_ewl1501aa_t *oled, uint8_t on) {
+    uint8_t cmd[2] = {0xAE, 0x00};
+    if (on) cmd[0] = 0xAF;
+    EPD_ERROR_CHECK(oled->cb.write_command_cb(oled->user_data, cmd, 1));
+
+    return EPD_OK;
+}
\ No newline at end of file