Working text on CalcOne!

boot/device/flash.ld

@@ -21,7 +21,7 @@ MEMORY {
   */
 }
 
-FRAMEBUFFER_SIZE = 9600;
+FRAMEBUFFER_SIZE = 19200;
 STACK_SIZE = 4K;
 
 SECTIONS {

ion/platform/device/display.c

@@ -18,6 +18,7 @@
 
 #include <ion.h>
 #include <string.h>
+#include <assert.h>
 
 #include "display/gpio.h"
 #include "display/spi.h"
@@ -40,6 +41,8 @@ void ion_display_off() {
 }
 
 void init_display() {
+  assert(FRAMEBUFFER_LENGTH == (FRAMEBUFFER_WIDTH*FRAMEBUFFER_HEIGHT*FRAMEBUFFER_BITS_PER_PIXEL)/8);
+
   display_gpio_init();
   display_spi_init();
 
@@ -57,9 +60,5 @@ void init_display() {
 
   memset(FRAMEBUFFER_ADDRESS, 0, FRAMEBUFFER_LENGTH);
 
-  for (int i=0;i<10;i++) {
-    ion_set_pixel(i,i,0x3);
-  }
-
   display_dma_init();
 }

ion/platform/device/display/dma.c

@@ -38,7 +38,8 @@ void display_dma_init() {
 
   // 9 - Data transfer direction, peripheral/memory increment, single burst or transaction, peripheral and memory data width
     REGISTER_SET_VALUE(DMA_SCR(DMA1,LCD_DMA_STREAM), DMA_DIR, DMA_DIR_MEMORY_TO_PERIPHERAL);
-    //DMA_SCR(DMA1,LCD_DMA_STREAM) |= DMA_CIRC;
+
+    DMA_SCR(DMA1,LCD_DMA_STREAM) |= DMA_CIRC;
 
     // Memory address is incremented
     DMA_SCR(DMA1,LCD_DMA_STREAM) |= DMA_MINC;
@@ -51,4 +52,9 @@ void display_dma_init() {
 
     // 11 - Bonux: enable DMA requests on SPI
     SPI_CR2(SPI2) |= SPI_TXDMAEN;
+
+    /*while (DMA_SCR(DMA1,LCD_DMA_STREAM) & DMA_EN) {
+    }
+    DMA_SCR(DMA1,LCD_DMA_STREAM) |= DMA_EN;
+    */
 }

ion/platform/device/framebuffer.h

@@ -3,6 +3,6 @@ extern char _framebuffer_end;
 
 #define FRAMEBUFFER_ADDRESS (&_framebuffer_start)
 #define FRAMEBUFFER_LENGTH (&_framebuffer_end-&_framebuffer_start)
-#define FRAMEBUFFER_WIDTH 160
+#define FRAMEBUFFER_WIDTH 240
 #define FRAMEBUFFER_HEIGHT 160
 #define FRAMEBUFFER_BITS_PER_PIXEL 4

src/hello.cpp

@@ -8,6 +8,9 @@ extern "C" {
 #include <poincare.h>
 
 void hello() {
+
+  KDDrawString("Hello, world!", (KDPoint){.x = x, .y = 10});
+
   char input[255];
 
   int index = 0;