char drawing

need to fix row ordering

1 files changed, 27 insertions, 1 deletions

diff --git a/src/ssd1306.c b/src/ssd1306.c
index ba17c04..de31d0f 100644
--- a/src/ssd1306.c
+++ b/src/ssd1306.c
@@ -1,5 +1,7 @@
 #include "ssd1306.h"
 
+#include "chars.h"
+
 #include <hardware/gpio.h>
 #include <pico/error.h>
 
@@ -54,7 +56,7 @@ int ssd_power_on(ssd1306_t *display) {
   ssd_push(display, SSD1306_MEM_MODE_HORIZONTAL);
 
   ssd_push(display, SSD1306_SEG_REMAP_COL0);
-  ssd_push(display, SSD1306_COM_SCAN_NORMAL);
+  ssd_push(display, SSD1306_COM_SCAN_REMAP);
   ssd_push(display, SSD1306_SET_COM_PINS);
   ssd_push(display, SSD1306_COM_PINS_SEQUENTIAL);
 
@@ -74,3 +76,27 @@ int ssd_power_on(ssd1306_t *display) {
 
   return ssd_send(display);
 }
+
+int ssd_push_char(ssd1306_t *display, const char c) {
+  uint8_t scr = ascii_to_screen[c];
+
+  for (int i = 0; i < 8; i++) {
+    int ret = ssd_push(display, c64_chars[scr + 256][i]);
+    if (ret < 0) {
+      return ret;
+    }
+  }
+
+  return PICO_OK;
+}
+
+int ssd_push_str(ssd1306_t *display, const char *str) {
+  for (int i = 0; str[i]; i++) {
+    int ret = ssd_push_char(display, str[i]);
+    if (ret < 0) {
+      return ret;
+    }
+  }
+
+  return PICO_OK;
+}