Differences

This shows you the differences between two versions of the page.

--- ctboard:peripherals:hexsw [2016/02/11 07:26] – feur
+++ ctboard:peripherals:hexsw [2022/12/23 11:01] (current) – ruan
@@ Line 3: / Line 3: @@
 The HEX switch on the CT Board can switch through 16 different states (4 bit). \\ \\
-> {{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 read only.
+**Caveat:** Register bits [7:4] are read as '1' and therefore need to be masked.
-{{ctboard_hexsw_reg.svg}}
+The register is read only.
+\\ {{ctboard_hexsw_reg.svg}} \\ \\
 ===== Diagram =====
 \\ {{:ctboard:peripherals:ctboard_hexsw.svg?700em}} \\ \\
+===== Programming Example =====
+The code snippets below show how to use the HEXSW.
+<code c>
+#include "reg_ctboard.h"
+uint8_t data = CT_HEXSW;                    /* Read HEXSW into the lower nibble of a byte. */
+</code>
+\\
+<code asm>
+ADDR_HEXSW      EQU      0x60000211
+                LDR      r0, =ADDR_HEXSW
+                LDRB     r1, [r0, #0]       ; Read HEXSW into the lower nibble of a byte.
+</code>
+\\