Maxim Integrated
Demo for MAXREFDES99
Diff: maxrefdes99.cpp
- Revision:
- 2:9fdd01cf0f88
- Parent:
- 0:6b0161c3e440
- Child:
- 3:41bdbc9b3cec
--- a/maxrefdes99.cpp Tue Jan 26 02:39:36 2016 +0000
+++ b/maxrefdes99.cpp Thu Mar 24 23:35:56 2016 +0000
@@ -149,8 +149,10 @@
static uint8_t display_buff[256];
static uint8_t temp_buff[256];
-static const uint8_t DISPLAY_BUFF_START = 112;
-static const uint8_t DISPLAY_BUFF_END = 143;
+static const uint8_t DISPLAY_BUFF_START = 0;
+static const uint8_t DISPLAY_BUFF_END = 31;
+
+static uint8_t buff_end = 0;
static const uint32_t MAX_STRING_LENGTH = 32;
static char str[MAX_STRING_LENGTH];
@@ -178,77 +180,82 @@
//*********************************************************************
-void print_char(Max7219 *p_display, uint8_t position, char c)
+void print_char(Max7219 *p_display, uint8_t position99, char c)
{
uint8_t idx;
+ uint8_t char_buff[6];
+ uint8_t device;
uint8_t wrap_device;
uint8_t wrap_idx;
- uint8_t char_buff[6];
- uint8_t device;
- uint8_t display_buff_idx = 0;
+ uint8_t buff_start = position99;
get_5x7_character(c, char_buff);
-
- //get device and device_position
- if(position > 8)
+
+ if(position99 < 33)
{
- if(position%8)
- {
- device = ((position/8) + 1);
- position = position%8;
- }
- else
- {
- device = position/8;
- position = 8;
- }
+ //get device and device_position
+ if(position99 > 8)
+ {
+ if(position99%8)
+ {
+ device = ((position99/8) + 1);
+ position99 = position99%8;
+ }
+ else
+ {
+ device = position99/8;
+ position99 = 8;
+ }
+ }
+ else
+ {
+ device = 1;
+ }
+
+ //check for dispaly wrap around
+ //(moving to next 8x8 grid cause character doesn't fit on current one)
+ if(position99 > 3)
+ {
+ wrap_idx = (9 - position99);
+ if(device < 4)
+ {
+ wrap_device = (device + 1);
+ }
+ else
+ {
+ wrap_device = 1;
+ }
+ }
+ else
+ {
+ wrap_idx = 6; //make bigger than idx, not used
+ wrap_device = 0; //not used
+ }
+
+ //print character to position
+ for(idx = 0; idx < 6; idx++)
+ {
+ //check for wrap
+ if((idx >= wrap_idx) && (device != 4))
+ {
+ p_display->write_digit(wrap_device, ((idx - wrap_idx) + 1), char_buff[idx]);
+ }
+ else
+ {
+ p_display->write_digit(device, (position99 + idx), char_buff[idx]);
+ }
+
+ buff_end = ((buff_start - 1) + idx);
+ display_buff[buff_end] = char_buff[idx];
+ }
}
else
{
- device = 1;
- }
-
- //check for dispaly wrap around
- //(moving to next 8x8 grid cause character doesn't fit on current one)
- if(position > 3)
- {
- wrap_idx = (9 - position);
- if(device < 4)
- {
- wrap_device = (device + 1);
- }
- else
- {
- wrap_device = 1;
- }
- }
- else
- {
- wrap_idx = 6; //make bigger than idx, not used
- wrap_device = 0; //not used
- }
-
- //print character to position
- for(idx = 0; idx < 6; idx++)
- {
- //check for wrap
- if(idx >= wrap_idx)
- {
- p_display->write_digit(wrap_device, ((idx - wrap_idx) + 1), char_buff[idx]);
- }
- else
- {
- p_display->write_digit(device, (position + idx), char_buff[idx]);
- }
-
- //get index for display buffer, keeps image of display for shifting
- display_buff_idx = (((device - 1) * 8) + (position - 1) + idx + DISPLAY_BUFF_START);
- //wrap buff back around
- if(display_buff_idx > 255)
- {
- display_buff_idx = display_buff_idx - 256;
- }
- display_buff[display_buff_idx] = char_buff[idx];
+ for(idx = 0; idx < 6; idx++)
+ {
+ buff_end = ((buff_start - 1) + idx);
+ display_buff[buff_end] = char_buff[idx];
+ }
}
}
@@ -267,16 +274,16 @@
//*********************************************************************
-void shift_display_right(Max7219 *p_display, uint8_t count, uint8_t delay)
+void shift_display_right(Max7219 *p_display, uint8_t count, uint8_t ms_delay)
{
uint16_t idx, idy;
- uint8_t position;
+ uint8_t position99;
for(idx = 0; idx < count; idx++)
{
- for(idy = 0; idy < 256; idy++)
+ for(idy = 0; idy < (buff_end + 1); idy++)
{
- if(idy == 255)
+ if(idy == buff_end)
{
temp_buff[0] = display_buff[idy];
}
@@ -286,74 +293,75 @@
}
}
- for(idy = 0; idy < 256; idy++)
+ for(idy = 0; idy < (buff_end + 1); idy++)
{
//save shifted display in buffer
display_buff[idy] = temp_buff[idy];
- if((idy >= DISPLAY_BUFF_START) && ( idy <= DISPLAY_BUFF_END))
+ if(idy <= DISPLAY_BUFF_END)
{
- position = ((idy - DISPLAY_BUFF_START) + 1);
- if(position > 24)
+ position99 = ((idy - DISPLAY_BUFF_START) + 1);
+ if(position99 > 24)
{
- if(position % 8)
+ if(position99 % 8)
{
- position = position % 8;
+ position99 = position99 % 8;
}
else
{
- position = 8;
+ position99 = 8;
}
- p_display->write_digit(4, position, display_buff[idy]);
+ p_display->write_digit(4, position99, display_buff[idy]);
}
- else if(position > 16)
+ else if(position99 > 16)
{
- if(position % 8)
+ if(position99 % 8)
{
- position = position % 8;
+ position99 = position99 % 8;
}
else
{
- position = 8;
+ position99 = 8;
}
- p_display->write_digit(3, position, display_buff[idy]);
+ p_display->write_digit(3, position99, display_buff[idy]);
}
- else if(position > 8)
+ else if(position99 > 8)
{
- if(position % 8)
+ if(position99 % 8)
{
- position = position % 8;
+ position99 = position99 % 8;
}
else
{
- position = 8;
+ position99 = 8;
}
- p_display->write_digit(2, position, display_buff[idy]);
+ p_display->write_digit(2, position99, display_buff[idy]);
}
else
{
- p_display->write_digit(1, position, display_buff[idy]);
+ p_display->write_digit(1, position99, display_buff[idy]);
}
}
}
-
- wait_ms(delay);
+
+ wait_ms(ms_delay);
}
}
-void shift_display_left(Max7219 *p_display, uint8_t count, uint8_t delay)
+//*********************************************************************
+void shift_display_left(Max7219 *p_display, uint8_t count, uint8_t ms_delay)
{
uint16_t idx, idy;
- uint8_t position;
+ uint8_t position99;
for(idx = 0; idx < count; idx++)
{
- for(idy = 0; idy < 256; idy++)
+ for(idy = 0; idy < (buff_end + 1); idy++)
{
if(idy == 0)
{
- temp_buff[255] = display_buff[idy];
+ temp_buff[buff_end] = display_buff[idy];
}
else
{
@@ -361,58 +369,58 @@
}
}
- for(idy = 0; idy < 256; idy++)
+ for(idy = 0; idy < (buff_end + 1); idy++)
{
//save shifted display in buffer
display_buff[idy] = temp_buff[idy];
- if((idy >= DISPLAY_BUFF_START) && ( idy <= DISPLAY_BUFF_END))
+ if(idy <= DISPLAY_BUFF_END)
{
- position = ((idy - DISPLAY_BUFF_START) + 1);
- if(position > 24)
+ position99 = ((idy - DISPLAY_BUFF_START) + 1);
+ if(position99 > 24)
{
- if(position % 8)
+ if(position99 % 8)
{
- position = position % 8;
+ position99 = position99 % 8;
}
else
{
- position = 8;
+ position99 = 8;
}
- p_display->write_digit(4, position, display_buff[idy]);
+ p_display->write_digit(4, position99, display_buff[idy]);
}
- else if(position > 16)
+ else if(position99 > 16)
{
- if(position % 8)
+ if(position99 % 8)
{
- position = position % 8;
+ position99 = position99 % 8;
}
else
{
- position = 8;
+ position99 = 8;
}
- p_display->write_digit(3, position, display_buff[idy]);
+ p_display->write_digit(3, position99, display_buff[idy]);
}
- else if(position > 8)
+ else if(position99 > 8)
{
- if(position % 8)
+ if(position99 % 8)
{
- position = position % 8;
+ position99 = position99 % 8;
}
else
{
- position = 8;
+ position99 = 8;
}
- p_display->write_digit(2, position, display_buff[idy]);
+ p_display->write_digit(2, position99, display_buff[idy]);
}
else
{
- p_display->write_digit(1, position, display_buff[idy]);
+ p_display->write_digit(1, position99, display_buff[idy]);
}
}
}
-
- wait_ms(delay);
+
+ wait_ms(ms_delay);
}
}
@@ -434,6 +442,11 @@
display_buff[idx + DISPLAY_BUFF_START] = 0xFF;
}
}
+
+ if(buff_end < (quad * 8))
+ {
+ buff_end = (quad * 8);
+ }
p_display->device_all_on(quad);
}
@@ -456,6 +469,13 @@
display_buff[idx + DISPLAY_BUFF_START] = 0;
}
}
+
+ //is buff_end in the quad?
+ if((((quad - 1) * 8) < buff_end) && ((quad * 8) > buff_end))
+ {
+ buff_end = ((quad - 1) * 8);
+ }
+ //leave it alone otherwise
p_display->device_all_off(quad);
}
@@ -464,10 +484,15 @@
//*********************************************************************
void all_on(Max7219 *p_display)
{
- for(uint16_t idx = 0; idx < 256; idx++)
+ for(uint16_t idx = 0; idx < 32; idx++)
{
display_buff[idx] = 0xFF;
}
+
+ if(buff_end < 32)
+ {
+ buff_end = 32;
+ }
p_display->display_all_on();
}
@@ -476,10 +501,15 @@
//*********************************************************************
void all_off(Max7219 *p_display)
{
- for(uint16_t idx = 0; idx < 256; idx++)
+ for(uint16_t idx = 0; idx < 32; idx++)
{
display_buff[idx] = 0;
}
+
+ if(buff_end < 32)
+ {
+ buff_end = 0;
+ }
p_display->display_all_off();
}
@@ -633,7 +663,7 @@
printf(msg);
//get user input
- fgets(str, 2, stdin);
+ fgets(str, 4, stdin);
//Remove trailing newline and CR, if there.
if((strlen(str) > 0 ) && (str[strlen(str) - 1] == 0x0A) && (str[strlen(str) - 2] == 0x0D))