-#include "display.h"
+#include "display_basic.h"
#include "vend.h"
-#define DELAY_MAGIC 20 /* FIXME: number of loops for ~ 1 millisecond (< 256) */
void delay(u16 ms) {
+ asm volatile ("ldx %0\n" :: "m" (ms) : "x");
+ asm volatile (
+ "delay_loop:\n"
+ " ldd #150\n" /* 3 */
+ "delay_inner_loop:\n" /* 15 cycles each */
+ " cpd #0x0000\n" /* 5 */
+ " beq delay_inner_loop_end\n" /* 3 */
+ " subd #0x0001\n" /* 4 */
+ " bra delay_inner_loop\n" /* 3 */
+ "delay_inner_loop_end:\n"
+ " dex\n" /* 3 */
+ " beq delay_out\n" /* 3 */
+ " bra delay_loop\n" /* 3 */
+ "delay_out:\n" ::: "x", "d");
+}
+
+u8 my_strlen(char* s) {
+ char *p = s;
+ while (*p) p++;
+ return p-s;
+}
+
+void my_strncpy(char* dst, char* src, u8 max_size) {
u8 i;
- for (;ms;ms--) {
- for (i=0;i<DELAY_MAGIC; i++)
- asm("nop\nnop\nnop\nnop\nnop\n");
- }
+ for (i = 0; src[i] && i < max_size; i++) dst[i] = src[i];
+ if (src[i] == 0 && i < max_size) dst[i] = 0; /* null terminator */
}
-void print_amount(u16 amt) {
- /* take amt and show it on screen with a $ sign */
- char str[10] = {' ', '$', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' '};
- u8 pos;
- for (pos = 7; amt; pos--, amt/=10);
- str[pos] = amt%10 + '0';
+bool my_strncmp(char* a, char* b, u8 len) {
+ u8 i;
+ for (i = 0; i < len; i++) {
+ if (*a != *b) return 0;
+ a++;
+ b++;
}
- set_msg(str, WRAP_NONE);
+ return 1;
}
+
+void my_memcpy(char* dst, char* src, u8 size) {
+ u8 i = 0;
+ for (i = 0; i < size; i++) dst[i] = src[i];
+}
+
+void my_memset(char* dst, u8 val, u16 count) {
+ char* c;
+ for (c = dst; c < dst+count; c++) *c = val;
+}
+
+u8 hexchar2u8(char b) {
+ if (b >= '0' && b <= '9') return b-'0';
+ if (b >= 'a' && b <= 'f') return b-'a'+0x0a;
+ if (b >= 'A' && b <= 'F') return b-'A'+0x0a;
+ return 0;
+}
+
+char nibble2hexchar(u8 b) {
+ if (b <= 9) return b+'0';
+ if (b >= 10 && b <= 15) return b+'A'-10;
+ return 'X';
+}
+
+u8 hex2u8(char msb, char lsb) {
+ return (hexchar2u8(msb) << 4) + hexchar2u8(lsb);
+}
+
+static char hexconv_buf[3];
+char* u82hex(u8 a) {
+ hexconv_buf[0] = nibble2hexchar((a&0xf0) >> 4);
+ hexconv_buf[1] = nibble2hexchar(a&0x0f);
+ hexconv_buf[2] = '\0';
+ return hexconv_buf;
+}
+
+bool ishex(char b) {
+ if (b >= '0' && b <= '9') return 1;
+ if (b >= 'a' && b <= 'f') return 1;
+ if (b >= 'A' && b <= 'F') return 1;
+ return 0;
+}
+