Differences

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--- ctboard:peripherals:gpio_cpld [2016/02/25 11:38] – created feur
+++ ctboard:peripherals:gpio_cpld [2026/06/25 14:52] (current) – [Programming Example] scbj
@@ Line 5: / Line 5: @@
 > {{ctboard:ctboard_mode_1.svg?48px }} Please make sure the CT Board is in the correct mode.
 > Supported [[ctboard:mode_switch|mode]]: **1**
-\\
-===== Programming Example =====
-The code snippet bellow shows how to use the GPIO.
-<code c>
-#include "reg_ctboard.h"
-uint8_t data_byte = CT_GPIO->IN.BYTE.P1;              /* Read byte from P1. */
-uint16_t data_hword = CT_GPIO->IN.HWORD.P2_1;         /* Read half word from P1 and P2. */
-uint32_t data_word = CT_GPIO->IN.WORD;                /* Read word from all ports (P1..4). */
-CT_GPIO->OUT.BYTE.P3 = (uint8_t) data_byte;           /* Write byte of data to P3. */
-CT_GPIO->OUT.HWORD.P4_3 = (uint16_t) data_halfword;   /* Write halfword of data to P3..4 */
-CT_GPIO->OUT.WORD = (uint32_t) data_word;             /* Write data to all ports (P1..4). */
-</code>
 \\
@@ Line 33: / Line 16: @@
 ==== Output ====
-The Registers are read / write.
+The registers are read / write.
 \\ {{ctboard_gpio_output_reg.svg}} \\ \\
@@ Line 40: / Line 23: @@
 \\ {{ctboard_gpio_cpld.svg}} \\ \\
+===== Programming Example =====
+The code snippets below show how to use the GPIO.
+<code c>
+#include "reg_ctboard.h"
+uint8_t data_byte = CT_GPIO->IN.BYTE.P1;              /* Read byte from P1. */
+uint16_t data_hword = CT_GPIO->IN.HWORD.P2_1;         /* Read half word from P1 and P2. */
+uint32_t data_word = CT_GPIO->IN.WORD;                /* Read word from all ports (P1..4). */
+CT_GPIO->OUT.BYTE.P3 = (uint8_t) data_byte;           /* Write byte of data to P3. */
+CT_GPIO->OUT.HWORD.P4_3 = (uint16_t) data_halfword;   /* Write halfword of data to P3..4 */
+CT_GPIO->OUT.WORD = (uint32_t) data_word;             /* Write word of data to all ports (P1..4). */
+</code>
+\\
+<code text>
+.equ ADDR_GPIO_IN,   0x60000410
+.equ ADDR_GPIO_OUT,  0x60000400
+        ldr     r0,  =ADDR_GPIO_IN
+        ldrb    r1,  [r0, #0]                 // Read byte from P1.
+        ldrw    r1,  [r0, #0]                 // Read half word from P1 and P2.
+        ldr     r1,  [r0, #0]                 // Read word from all ports (P1..4).
+        ldr     r0,  =ADDR_GPIO_OUT
+        strb    r1,  [r0, #2]                 // Write byte of data to P3.
+        strh    r1,  [r0, #2]                 // Write halfword of data to P3..4.
+        str     r1,  [r0, #0]                 // Write word of data to all ports (P1..4).
+</code>
+\\