Fix GD77 display driver

meson.build

@@ -12,10 +12,10 @@ project('OpenRTX', 'c',
 ## OpenRTX
 
 
-openrtx_src = ['openrtx/src/bootstrap.c']
-               #'openrtx/src/state.c',
-               #'openrtx/src/ui.c',
-               #'openrtx/src/threads.c']
+openrtx_src = ['openrtx/src/bootstrap.c',
+               'openrtx/src/state.c',
+               'openrtx/src/ui.c',
+               'openrtx/src/threads.c']
 
 
 ## Replace main executable with platform test
@@ -204,7 +204,9 @@ mduv380_def = def + stm32f405_def + {'PLATFORM_MDUV380': ''}
 
 
 ## Radioddity GD77
-gd77_src = src + mk22fn512_src + ['platform/targets/GD77/platform.c']
+gd77_src = src + mk22fn512_src + ['platform/targets/GD77/platform.c',
+                                  'platform/drivers/display/UC1701_GD77.c',
+                                  'openrtx/src/graphics/graphics_bw.c']
 
 gd77_inc = inc + mk22fn512_inc + ['platform/targets/GD77']
 gd77_def = def + mk22fn512_def + {'PLATFORM_GD77': ''}

openrtx/src/graphics/graphics_bw.c

@@ -27,6 +27,7 @@
 #include <stdio.h>
 #include "display.h"
 #include "graphics.h"
+#include "hwconfig.h"
 
 typedef enum
 {

platform/drivers/display/UC1701_GD77.c

@@ -94,7 +94,8 @@ void display_init()
 //     sendByteToController(0xE2); /* System Reset                 */
     sendByteToController(0x2F); /* Voltage Follower On             */
     sendByteToController(0x81); /* Set Electronic Volume = 15      */
-    sendByteToController(0x3F); /* Full contrast                   */
+    /* TODO variable contrast */
+    sendByteToController(0x15); /* Contrast                        */
     sendByteToController(0xA2); /* Set Bias = 1/9                  */
     sendByteToController(0xA1); /* A0 Set SEG Direction            */
     sendByteToController(0xC0); /* Set COM Direction               */
@@ -110,40 +111,55 @@ void display_terminate()
     }
 }
 
+void display_renderRow(uint8_t row)
+{
+    /* magic stuff */
+    uint8_t *buf = (frameBuffer + 128 * row);
+    for (uint8_t i = 0; i<16; i++)
+    {
+        uint8_t tmp[8] = {0};
+        for (uint8_t j = 0; j < 8; j++)
+        {
+            uint8_t tmp_buf = buf[j*16 + i];
+            int count = __builtin_popcount(tmp_buf);
+            while (count > 0)
+            {
+                int pos = __builtin_ctz(tmp_buf);
+                tmp[pos] |= 1UL << j;
+                tmp_buf &= ~(1 << pos);
+                count--;
+            }
+        }
+        for (uint8_t s = 0; s < 8; s++){
+            sendByteToController(tmp[s]);
+        }
+    }
+}
+
 void display_renderRows(uint8_t startRow, uint8_t endRow)
 {
-    if(frameBuffer == NULL) return;
-
-    uint8_t *rowPos = (frameBuffer + startRow * SCREEN_WIDTH);
-
         for(uint8_t row = startRow; row < endRow; row++)
     {
         gpio_clearPin(LCD_RS);            /* RS low -> command mode */
         sendByteToController(0xB0 | row); /* Set Y position         */
         sendByteToController(0x10);       /* Set X position         */
         sendByteToController(0x04);
-
         gpio_setPin(LCD_RS);              /* RS high -> data mode   */
+        display_renderRow(row);
+    }
         
-        for(size_t x = 0; x < SCREEN_WIDTH; x++)
-        {
-            sendByteToController(*rowPos);
-            rowPos++;
-        }
-    }
 }
 
 void display_render()
 {
-    display_renderRows(0, SCREEN_HEIGHT);
+    gpio_clearPin(LCD_CS);
+    display_renderRows(0, SCREEN_HEIGHT / 8);
+    gpio_setPin(LCD_CS);
 }
 
 bool display_renderingInProgress()
 {
-    /*
-     * Rendering is in progress if display's chip select is low or a DMA
-     * transfer is in progress.
-     */
+    return (gpio_readPin(LCD_CS) == 0);
 }
 
 void *display_getFrameBuffer()

platform/targets/GD77/hwconfig.h

@@ -27,4 +27,16 @@
 #define GREEN_LED  GPIOB,18
 #define RED_LED    GPIOC,14
 
+/* Screen dimensions */
+#define SCREEN_WIDTH 128
+#define SCREEN_HEIGHT 64
+
+/* Display */
+#define LCD_BKLIGHT GPIOC,4
+#define LCD_CS      GPIOC,8
+#define LCD_RST     GPIOC,9
+#define LCD_RS      GPIOC,10
+#define LCD_CLK     GPIOC,11
+#define LCD_DAT     GPIOC,12
+
 #endif

platform/targets/GD77/platform.c

@@ -21,12 +21,30 @@
 #include <platform.h>
 #include <gpio.h>
 #include "hwconfig.h"
+#include "rtc.h"
+
+curTime_t rtc_getTime()
+{
+    /* TODO */
+    curTime_t t;
+    t.hour   = 12;
+    t.minute = 12;
+    t.second = 12;
+    t.year  = 2020;
+    t.day   = 4;
+    t.month = 12;
+    t.date  = 12;
+    return t;
+}
 
 void platform_init()
 {
     /* Configure GPIOs */
     gpio_setMode(GREEN_LED, OUTPUT);
     gpio_setMode(RED_LED, OUTPUT);
+
+    gpio_setMode(LCD_BKLIGHT, OUTPUT);
+    gpio_clearPin(LCD_BKLIGHT);
 }
 
 void platform_terminate()
@@ -112,4 +130,12 @@ void platform_beepStop()
 void platform_setBacklightLevel(uint8_t level)
 {
     /* TODO */
+    if(level > 1)
+    {
+        gpio_setPin(LCD_BKLIGHT);
+    }
+    else
+    {
+        gpio_clearPin(LCD_BKLIGHT);
+    }
 }