From: Delio Brignoli <brignoli.delio@gmail.com>
Date: Mon, 18 Sep 2017 12:14:37 +0000 (+0200)
Subject: parts: ssd1306: SET_COLUMN_*_NIBBLE commands are ignored in page mode
X-Git-Tag: v1.6~16
X-Git-Url: https://git.htl-mechatronik.at/public/?a=commitdiff_plain;h=67504103373de3bedd9980d43d1d9e5db76fa822;p=sx%2Fsimavr.git

parts: ssd1306: SET_COLUMN_*_NIBBLE commands are ignored in page mode
---

diff --git a/examples/parts/ssd1306_virt.c b/examples/parts/ssd1306_virt.c
index 7021d73..1ffa0e1 100644
--- a/examples/parts/ssd1306_virt.c
+++ b/examples/parts/ssd1306_virt.c
@@ -103,16 +103,20 @@ ssd1306_update_command_register (ssd1306_t *part)
 		case SSD1306_VIRT_SET_COLUMN_LOW_NIBBLE
 		                ... SSD1306_VIRT_SET_COLUMN_LOW_NIBBLE + 0xF:
 			part->spi_data -= SSD1306_VIRT_SET_COLUMN_LOW_NIBBLE;
-			part->cursor.column = (part->cursor.column & 0xF0)
+			if (part->addr_mode == SSD1306_ADDR_MODE_PAGE) {
+				part->cursor.column = (part->cursor.column & 0xF0)
 			                | (part->spi_data & 0xF);
+			}
 			//printf ("SSD1306: SET COLUMN LOW NIBBLE: 0x%02x\n",part->spi_data);
 			SSD1306_CLEAR_COMMAND_REG(part);
 			return;
 		case SSD1306_VIRT_SET_COLUMN_HIGH_NIBBLE
 		                ... SSD1306_VIRT_SET_COLUMN_HIGH_NIBBLE + 0xF:
 			part->spi_data -= SSD1306_VIRT_SET_COLUMN_HIGH_NIBBLE;
-			part->cursor.column = (part->cursor.column & 0xF)
+			if (part->addr_mode == SSD1306_ADDR_MODE_PAGE) {
+				part->cursor.column = (part->cursor.column & 0xF)
 			                | ((part->spi_data & 0xF) << 4);
+			}
 			//printf ("SSD1306: SET COLUMN HIGH NIBBLE: 0x%02x\n", part->spi_data);
 			SSD1306_CLEAR_COMMAND_REG(part);
 			return;