Initial commit

Mieke/Tutorial/Listings/asm.s

@@ -0,0 +1,49 @@
+                AREA BLINKEN, CODE, READONLY
+                INCLUDE STM32_F103RB_MEM_MAP.INC
+                EXPORT __main
+
+__main          PROC
+                BL      init_port
+                LDR     R1, =GPIOB_ODR
+_main_again     LDR     R0, [R1]
+                EOR     R0, R0, #0x100
+                STR     R0, [R1]
+                BL      wait_500ms
+                B       _main_again
+                ENDP
+
+init_port       PROC
+                PUSH    {R0-R2, LR}
+
+                MOV     R2, #0x8
+                LDR     R1, =RCC_APB2ENR
+                LDR     R0, [R1]
+                ORR     R0, R0, R2
+                STR     R0, [R1]
+
+                LDR     R1, =GPIOB_CRH
+                LDR     R0, [R1]
+                LDR     R2, =0xFFFFFFF0
+                AND     R0, R0, R2
+                MOV     R2, #0x03
+                ORR     R0, R0, R2
+                STR     R0, [R1]
+
+                POP     {R0-R2, PC}
+                ENDP
+
+wait_500ms      PROC
+                PUSH    {R0-R2, LR}
+                MOV     R0, #0x1F4
+                MOV     R1, #0
+_wait_ms_loop   MOV     R2, #0x63B
+_wait_ms_loop1  SUB     R2, R2, #1
+                CMP     R2, R1
+                BNE     _wait_ms_loop1
+                SUB     R0, R0, #1
+                CMP     R0, R1
+                BNE     _wait_ms_loop
+                POP     {R0-R2, PC}
+                ENDP
+
+                END

Mieke/Tutorial/Listings/c.c

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+#include <stm32f10x.h>
+
+void wait(void);
+void init_leds_switches(void);
+void set_leds(char value);
+char get_switches(void);
+void wait_ms(int ms);
+
+void init_leds_switches() {
+    int temp;
+
+    RCC->APB2ENR |= RCC_APB2ENR_IOPAEN;
+    RCC->APB2ENR |= RCC_APB2ENR_IOPBEN;
+
+    temp = GPIOA->CRL;
+    temp &= 0x00000000;
+    temp |= 0x88888888;
+    GPIOA->CRL = temp;
+    GPIOA->BSRR = 0x00FF;
+
+    temp = GPIOB->CRH;
+    temp &= 0x00000000;
+    temp |= 0x33333333;
+    GPIOB->CRH = temp;
+}
+
+void set_leds(char value) {
+    GPIOB->ODR =    (GPIOB->ODR & 0xFFFF00FF) |
+                    ((value & 0x000000FF) <<8);
+}
+
+char get_switches() {
+    return (GPIOA->IDR & 0x000000FF);
+}
+
+void wait_ms(int ms) {
+    int i,j;
+
+    for (i = 0; i < ms; i++) {
+        for (j = 0; j < 1595; j++);
+    }
+}
+
+void wait() {
+    unsigned char speed;
+    unsigned char i;
+
+    speed = get_switches();
+    speed = ~speed;
+    speed = speed & 0x7f;
+
+    for (i = 0; i <= speed; i++) {
+        wait_ms(100);
+    }
+}
+
+int main () {
+    char i;
+    char hs;
+    char lauflicht;
+
+    init_leds_switches();
+    hs = get_switches() & 0x80;
+    while (hs) {
+        lauflicht = 0x01;
+        i = 0;
+        while (i < 8) {
+            set_leds(lauflicht);
+            lauflicht = lauflicht << 1;
+            i++;
+            wait();
+        }
+        hs = get_switches() & 0x80;
+    }
+
+    while (1);
+}

Mieke/Tutorial/Listings/example1.c

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+#include "stm32f10x.h"
+
+void init_leds_switches(void) {
+    RCC->APB2ENR |= RCC_APB2ENR_IOPBEN;
+    GPIOB->CRH &= 0x00000000;
+    GPIOB->CRH |= 0x00000003;
+}
+
+int main()
+{
+    int i;
+    init_leds_switches();
+
+    for (;;) {
+        GPIOB->ODR = 0x01FF & ~(GPIOB->ODR & 0x01FF);
+        for (i=0; i < 65535; i++);
+        for (i=0; i < 65535; i++);
+        for (i=0; i < 65535; i++);
+    }
+}