Differences

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--- ctboard:peripherals:lcd_ascii [2016/02/25 13:31] – created feur
+++ ctboard:peripherals:lcd_ascii [2022/12/23 12:20] (current) – ruan
@@ Line 1: / Line 1: @@
 ====== LCD ASCII Interface ======
-The integrated LCD controller must allways be accessed with 16 bit half words! \\ \\
+Every position on the LCD corresponds to an address. See below for the relation. \\ \\
-> {{ctboard:ctboard_mode_1.svg?48px }} {{ctboard:ctboard_mode_2.svg?48px }} {{ctboard:ctboard_mode_3.svg?48px }} Please make sure the CT Board is in the correct mode.
+> {{ctboard:ctboard_mode_1.svg?48px }} {{ctboard:ctboard_mode_2.svg?48px }} {{ctboard:ctboard_mode_3.svg?48px }} {{ctboard:ctboard_mode_4.svg?48px }} Please make sure the CT Board is in the correct mode.
-> Supported [[ctboard:mode_switch|modes]]: **1**, **2**, **3**
+> Supported [[ctboard:mode_switch|modes]]: **1**, **2**, **3**, **4**
 \\
+===== Registers =====
+The registers are write only.
+\\ {{ctboard_lcd_ascii_reg_new.svg}} \\ \\
+===== Display Positions =====
+\\ {{ctboard_lcd_ascii_new.svg?700em}} \\ \\
+Base address: 0x6000'0300
 ===== Programming Example =====
-The code snippet bellow shows how to use the ASCII interface of the LCD.
+The code snippets below shows how to use the ASCII interface of the LCD.
 <code c>
 #include "reg_ctboard.h"
+const char text[] = "hello";
-CT_LCD->ASCII = (uint16_t) ((13u << 8u) | ascii_char);    /* Write ascii_char at position 13 on the LCD. */
+CT_LCD->ASCII[13u] = 'c';         /* Write character 'c' at position 13 on the LCD. */
+CT_LCD->ASCII[18u] = text[0u];    /* Write character 'h' from string "hello" at position 18 on the LCD. */
 </code>
 \\
 <code asm>
-ADDR_LCD_ASCII  EQU      0x60000310
+ADDR_LCD_ASCII  EQU      0x60000300
                 LDR      r0, =ADDR_LCD_ASCII
-                LDR      r1, #13                          ; Load position on display into r1.
+                LDR      r1, ="E"                         ; Load value of ASCII char 'E' into r1.
-                LDR      r2, "E"                          ; Load value of ASCII char 'E' into r2.
+                STRB     r1, [r0, #12]                    ; Write 'E' at position 13 on the LCD.
-                ; Thumb instruction set
-                LSLS     r1, #8                           ; Shift position 8 bits to the left
-                ORRS     r2, r1                           ; Combine position with ASCII character
-                ; ARM instruction set
-                ORRS     r2, r1, LSL #8                   ; Shift and combine position value with ASCII character
-                STRH     r2, [r0, #0]                     ; Write ascii_char at position 13 on the LCD.
 </code>
 \\
-===== Registers =====
-The Registers are read / write.
-\\ {{ctboard_lcd_ascii_reg.svg}} \\ \\
-===== Display Positions =====
-\\ {{ctboard_lcd_ascii.svg?700em}} \\ \\