From 89a597bfc475e8668e7a8c3849dab4f932a63383 Mon Sep 17 00:00:00 2001
From: Tectu <joel@unormal.org>
Date: Sun, 24 Jun 2012 16:04:11 +0200
Subject: [PATCH] ssd1289 GPIO split into two 8-bit groups

---
 drivers/lcd/ssd1289_lld.c |  9 ++++++---
 readme                    | 23 ++++++++++++++---------
 2 files changed, 20 insertions(+), 12 deletions(-)

diff --git a/drivers/lcd/ssd1289_lld.c b/drivers/lcd/ssd1289_lld.c
index 9f3303f9..86c8558f 100644
--- a/drivers/lcd/ssd1289_lld.c
+++ b/drivers/lcd/ssd1289_lld.c
@@ -11,7 +11,8 @@ static __inline void lld_lcdWriteIndex(uint16_t index) {
     Clr_RS;
     Set_RD;
   
-    palWritePort(LCD_DATA_PORT, index);
+	LCD_DATA_PORT_1->BSRR = (((~index >> 8) << 16) | (index >> 8) << LCD_DATA_PORT_1_BASE);
+	LCD_DATA_PORT_2->BSRR = (((~index & 0xFF) << 16) | (index & 0xFF) << LCD_DATA_PORT_2_BASE);
 
     Clr_WR;
     Set_WR;
@@ -20,7 +21,8 @@ static __inline void lld_lcdWriteIndex(uint16_t index) {
 static __inline void lld_lcdWriteData(uint16_t data) {
 	Set_RS;
 
-	palWritePort(LCD_DATA_PORT, data);
+    LCD_DATA_PORT_1->BSRR = (((~data >> 8) << 16) | (data >> 8) << LCD_DATA_PORT_1_BASE);
+    LCD_DATA_PORT_2->BSRR = (((~data & 0xFF) << 16) | (data & 0xFF) << LCD_DATA_PORT_2_BASE);
 
 	Clr_WR;
 	Set_WR;
@@ -83,7 +85,8 @@ __inline void lld_lcdWriteStream(uint16_t *buffer, uint16_t size) {
 	Set_RS;
 
 	for(i = 0; i < size; i++) {
-		palWritePort(LCD_DATA_PORT, buffer[i]);
+		LCD_DATA_PORT_1->BSRR = (((~buffer[i] >> 8) << 16) | (buffer[i] >> 8) << LCD_DATA_PORT_1_BASE);
+		LCD_DATA_PORT_2->BSRR = (((~buffer[i] & 0xFF) << 16) | (buffer[i] & 0xFF) << LCD_DATA_PORT_2_BASE);
 		Clr_WR;
 		Set_WR;
 	}
diff --git a/readme b/readme
index 7e926841..7840b56a 100644
--- a/readme
+++ b/readme
@@ -6,16 +6,21 @@ git clone https://github.com/tectu/Chibios-LCD-Driver lcd
 
 ### Edit boardfiles:
 add the following to your board.h file, matching to your pinconfig:
-	#define TP_PORT			GPIOC
-	#define TP_IRQ			4
-	#define TP_CS			6
+	#define TP_PORT					GPIOC
+	#define TP_IRQ					4
+	#define TP_CS					6
 
-	#define LCD_DATA_PORT	GPIOE
-	#define LCD_CMD_PORT	GPIOD
-	#define LCD_CS			12
-	#define LCD_RS			13
-	#define LCD_WR			14
-	#define LCD_RD			15
+	#define LCD_DATA_PORT_1			GPIOB
+	#define LCD_DATA_PORT_2			GPIOC
+	#define LCD_DATA_PORT_1_BASE	8
+	#define LCD_DATA_PORT_2_BASE	0
+	#define LCD_CMD_PORT			GPIOD
+	#define LCD_CS					12
+	#define LCD_RS					13
+	#define LCD_WR					14
+	#define LCD_RD					15
+
+in this example, we use GPIOC[0:7] for DB[0:7] and GPIOB[8:15] for DB[8:15]
 
 ### Edit Makefile:
 include lcd.mk: