WebSVN - Projects - Diff - Rev 932 and 1437 - /C-OSD/trunk/max7456_software

 /****************************************************************************
- *   Copyright (C) 2009-2011 by Claas Anders "CaScAdE" Rathje               *
+ *   Copyright (C) 2009-2012 by Claas Anders "CaScAdE" Rathje               *
  *   admiralcascade@gmail.com                                               *
  *   Project-URL: http://www.mylifesucks.de/oss/c-osd/                      *
  *                                                                          *
  *   This program is free software; you can redistribute it and/or modify   *
  *   it under the terms of the GNU General Public License as published by   *
 #include "usart0.h"
 char conv_array[7]; // general array for number -> char conversation
-int pow(int a, int b) {
+int int_pow(int a, int b) {
     if (b <= 0) return 1;
     int res = 1;
 /**
  *  write a <character> to <address> of MAX7456 display memory
  */
 void write_char(uint16_t address, char character) {
-    spi_send_byte(0x05, (address & 0xFF00) >> 8); // DMAH
+    spi_send_byte(MAX7456_DMAH, (address & 0xFF00) >> 8);
-    spi_send_byte(0x06, (address & 0x00FF)); // DMAL
+    spi_send_byte(MAX7456_DMAL, (address & 0x00FF));
-    spi_send_byte(0x07, character); // DMDI
+    spi_send_byte(MAX7456_DMDI, character);
+}
 /**
     /*uint16_t memory_address = 0;
     for (unsigned int a = 0; a < 480; a++) {
         write_char(memory_address++, 0);
     }*/
     // clear all display-mem (DMM)
-    spi_send_byte(0x04, 0b01000100);
+    spi_send_byte(MAX7456_DMM, 0b01000100);
-    // clearing takes 12uS according to maxim so lets wait longer
+    // clearing takes 20us according to maxim so lets wait longer
-    _delay_us(20);
+    _delay_us(21);
+}
 /**
  * let the MAX7456 learn a new character at <number>
  * with <data>.
  */
 void learn_char(uint8_t number, unsigned char* data) {
-    // select character to write (CMAH)
+    // select character to write
-    spi_send_byte(0x09, number);
+    spi_send_byte(MAX7456_CMAH, number);
     for (uint8_t i = 0; i < 54; i++) {
-        // select 4pixel byte of char (CMAL)
+        // select 4pixel byte of char
-        spi_send_byte(0x0A, i);
+        spi_send_byte(MAX7456_CMAL, i);
-        // write 4pixel byte of char (CMDI)
+        // write 4pixel byte of char
-        spi_send_byte(0x0B, data[i]);
+        spi_send_byte(MAX7456_CMDI, data[i]);
     }
-    // write to the NVM array from the shadow RAM (CMM)
+    // write to the NVM array from the shadow RAM
-    spi_send_byte(0x08, 0b10100000);
+    spi_send_byte(MAX7456_CMM, 0b10100000);
  *  write a character <attribute> to <address> of MAX7456 display memory
  */
 void write_char_att(uint16_t address, char attribute) {
     // the only important part is that the DMAH[1] is set
     // so we add 2 which binary is the 2nd lowest byte
-    spi_send_byte(0x05, ((address & 0xFF00) >> 8) | 2); // DMAH
+    spi_send_byte(MAX7456_DMAH, ((address & 0xFF00) >> 8) | 2);
-    spi_send_byte(0x06, (address & 0x00FF)); // DMAL
+    spi_send_byte(MAX7456_DMAL, (address & 0x00FF));
-    spi_send_byte(0x07, attribute); // DMDI
+    spi_send_byte(MAX7456_DMDI, attribute);
+}
 /**
  *  write a <character> at <x>/<y> to MAX7456 display memory
  * Write a unsigned <number> at <x>/<y> to MAX7456 display memory
  * <length> represents the length to rightbound the number
  * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of   7
  */
 void write_ndigit_number_u(uint8_t x, uint8_t y, uint16_t number, int16_t length, uint8_t pad) {
-    if (number >= pow(10, length)) {
+    if (number >= int_pow(10, length)) {
-        number = pow(10, length) - 1;
+        number = int_pow(10, length) - 1;
+    }
     itoa(number, conv_array, 10);
     for (uint8_t i = 0; i < length - strlen(conv_array); i++) {
         if (pad) write_char((x++)+(y * 30), 10);
         else write_ascii_char((x++)+(y * 30), 0);
  * Write a signed <number> at <x>/<y> to MAX7456 display memory
  * <length> represents the length to rightbound the number
  * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of   7
  */
 void write_ndigit_number_s(uint8_t x, uint8_t y, int16_t number, int16_t length, uint8_t pad) {
-    if (number <= -pow(10, length)) {
+    if (number <= -int_pow(10, length)) {
-        number = -pow(10, length) + 1;
+        number = -int_pow(10, length) + 1;
-    } else if (number >= pow(10, length)) {
+    } else if (number >= int_pow(10, length)) {
-        number = pow(10, length) - 1;
+        number = int_pow(10, length) - 1;
+    }
     itoa(number, conv_array, 10);
     if (strlen(conv_array) < length) {
  * Write a unsigned <number> at <x>/<y> to MAX7456 display memory as /10th of value
  * <length> represents the length to rightbound the number
  * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of   7
  */
 void write_ndigit_number_u_10th(uint8_t x, uint8_t y, uint16_t number, int16_t length, uint8_t pad) {
-    if (number >= pow(10, length)) {
+    if (number >= int_pow(10, length)) {
-        number = pow(10, length) - 1;
+        number = int_pow(10, length) - 1;
+    }
     itoa(number, conv_array, 10);
     uint8_t len = strlen(conv_array);
     for (uint8_t i = 0; i < length - len; i++) {
         if (pad) write_char((x++)+(y * 30), 10); //  zero
  * Write a signed <number> at <x>/<y> to MAX7456 display memory as /10th of value
  * <length> represents the length to rightbound the number
  * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of   7
  */
 void write_ndigit_number_s_10th(uint8_t x, uint8_t y, int16_t number, int16_t length, uint8_t pad) {
-    if (number >= pow(10, length)) {
+    if (number >= int_pow(10, length)) {
-        number = pow(10, length) - 1;
+        number = int_pow(10, length) - 1;
+    }
     itoa(number, conv_array, 10);
     uint8_t len = strlen(conv_array);
     for (uint8_t i = 0; i < length - len; i++) {
         if (pad) write_char((x++)+(y * 30), 10); //  zero

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(root)/C-OSD/trunk/max7456_software_spi.c/ - Rev 932 → 1437