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Message |
sshahryiar
Joined: 05 May 2010
Posts: 94
Location: Dhaka, Bangladesh
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| TM1640 Multi-Seven segment Display Driver |
 Posted: Wed Jun 11, 2014 8:31 am |
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Font.h
| Code: |
const unsigned char font[95] =
{
0x00, // (32) <space>
0x86, // (33) !
0x22, // (34) "
0x7E, // (35) #
0x6D, // (36) $
0x00, // (37) %
0x00, // (38) &
0x02, // (39) '
0x30, // (40) (
0x06, // (41) )
0x63, // (42) *
0x00, // (43) +
0x04, // (44) ,
0x40, // (45) -
0x80, // (46) .
0x52, // (47) /
0x3F, // (48) 0
0x06, // (49) 1
0x5B, // (50) 2
0x4F, // (51) 3
0x66, // (52) 4
0x6D, // (53) 5
0x7D, // (54) 6
0x27, // (55) 7
0x7F, // (56) 8
0x6F, // (57) 9
0x00, // (58) :
0x00, // (59) ;
0x00, // (60) <
0x48, // (61) =
0x00, // (62) >
0x53, // (63) ?
0x5E, // (64) @
0x77, // (65) A
0x7E, // (66) B
0x39, // (67) C
0x3E, // (68) D
0x79, // (69) E
0x71, // (70) F
0x3D, // (71) G
0x76, // (72) H
0x06, // (73) I
0x1F, // (74) J
0x69, // (75) K
0x38, // (76) L
0x15, // (77) M
0x37, // (78) N
0x3F, // (79) O
0x73, // (80) P
0x67, // (81) Q
0x31, // (82) R
0x6D, // (83) S
0x78, // (84) T
0x3E, // (85) U
0x2A, // (86) V
0x1D, // (87) W
0x76, // (88) X
0x6E, // (89) Y
0x5B, // (90) Z
0x39, // (91) [
0x64, // (92) \
0x0F, // (93) ]
0x00, // (94) ^
0x08, // (95) _
0x20, // (96) `
0x5F, // (97) a
0x7C, // (98) b
0x58, // (99) c
0x5E, // (100) d
0x7B, // (101) e
0x31, // (102) f
0x6F, // (103) g
0x74, // (104) h
0x04, // (105) i
0x0E, // (106) j
0x75, // (107) k
0x30, // (108) l
0x55, // (109) m
0x54, // (110) n
0x5C, // (111) o
0x73, // (112) p
0x67, // (113) q
0x50, // (114) r
0x6D, // (115) s
0x78, // (116) t
0x1C, // (117) u
0x2A, // (118) v
0x1D, // (119) w
0x76, // (120) x
0x6E, // (121) y
0x47, // (122) z
0x46, // (123) {
0x06, // (124) |
0x70, // (125) }
0x01 // (126) ~
};
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TM1640.h
| Code: |
#include "font.h"
#define DIN pin_A4
#define SCLK pin_A5
#define no_of_segments 16
#define auto_address 0x40
#define fixed_address 0x44
#define normal_mode 0x40
#define test_mode 0x48
#define start_address 0xC0
#define brightness_5_pc 0x88
#define brightness_10_pc 0x89
#define brightness_25_pc 0x8A
#define brightness_60_pc 0x8B
#define brightness_70_pc 0x8C
#define brightness_75_pc 0x8D
#define brightness_80_pc 0x8E
#define brightness_100_pc 0x8F
#define display_off 0x80
#define display_on 0x8F
void TM1640_init(unsigned char brightness_level);
void TM1640_write(unsigned char value);
void TM1640_send_command(unsigned char value);
void TM1640_send_data(unsigned char address, unsigned char value);
void TM1640_clear_display();
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TM1640.c
| Code: |
#include "TM1640.h"
void TM1640_init(unsigned char brightness_level)
{
output_high(DIN);
output_high(SCLK);
TM1640_send_command(auto_address);
TM1640_send_command(brightness_level);
TM1640_clear_display();
}
void TM1640_write(unsigned char value)
{
unsigned char s = 0x00;
for(s = 0x00; s < 0x08; s += 0x01)
{
output_low(SCLK);
if((value & 0x01))
{
output_high(DIN);
}
else
{
output_low(DIN);
}
output_high(SCLK);
value >>= 0x01;
};
}
void TM1640_send_command(unsigned char value)
{
output_low(DIN);
TM1640_write(value);
output_high(DIN);
}
void TM1640_send_data(unsigned char address, unsigned char value)
{
TM1640_send_command(fixed_address);
output_low(DIN);
TM1640_write((0xC0 | (0x0F & address)));
TM1640_write(value);
output_high(DIN);
}
void TM1640_clear_display()
{
unsigned char s = 0x00;
output_low(DIN);
TM1640_write(start_address);
for(s = 0x00; s < no_of_segments; s += 0x01)
{
TM1640_write(font[0]);
};
output_high(DIN);
}
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DHT11.h
| Code: |
#define DHT11_pin PIN_A1
unsigned char values[5];
void DHT11_init();
unsigned char get_byte();
unsigned char get_data();
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DHT11.c
| Code: |
#include "DHT11.h"
void DHT11_init()
{
output_float(DHT11_pin);
delay_ms(1000);
}
unsigned char get_byte()
{
unsigned char s = 0;
unsigned char value = 0;
for(s = 0; s < 8; s += 1)
{
value <<= 1;
while(!input(DHT11_pin));
delay_us(30);
if(input(DHT11_pin))
{
value |= 1;
}
while(input(DHT11_pin));
}
return value;
}
unsigned char get_data()
{
short chk = 0;
unsigned char s = 0;
unsigned char check_sum = 0;
output_high(DHT11_pin);
output_low(DHT11_pin);
delay_ms(18);
output_high(DHT11_pin);
delay_us(26);
chk = input(DHT11_pin);
if(chk)
{
return 1;
}
delay_us(80);
chk = input(DHT11_pin);
if(!chk)
{
return 1;
}
delay_us(80);
for(s = 0; s <= 4; s += 1)
{
values[s] = get_byte();
}
output_high(DHT11_pin);
for(s = 0; s < 4; s += 1)
{
check_sum += values[s];
}
if(check_sum != values[4])
{
return 1;
}
else
{
return 0;
}
}
|
Example:
| Code: |
#include <12F675.h>
#device *= 16
#device ADC = 8
#fuses INTRC_IO, NOWDT, PROTECT, NOMCLR, BROWNOUT, PUT, CPD
#use delay (internal = 4MHz)
#include "DHT11.c"
#include "TM1640.c"
void setup();
void main()
{
short state = 0;
unsigned char tmp = 0;
unsigned char brightness = 0;
setup();
while(TRUE)
{
state = get_data();
read_adc(adc_start_only);
while(!adc_done());
brightness = read_adc(adc_read_only);
brightness >>= 5;
if(brightness > 7)
{
brightness = 7;
}
TM1640_send_command(0x88 | brightness);
switch(state)
{
case 1:
{
TM1640_send_data(5, (font[37]));
TM1640_send_data(6, (font[82]));
TM1640_send_data(7, (font[82]));
TM1640_send_data(8, (font[79]));
TM1640_send_data(9, (font[82] | font[14]));
delay_ms(600);
TM1640_clear_display();
delay_ms(900);
break;
}
default:
{
TM1640_clear_display();
TM1640_send_data(0, (font[82] | font[14]));
TM1640_send_data(1, (font[72] | font[14]));
TM1640_send_data(2, (font[0]));
tmp = (values[0] / 100);
if(tmp >= 1)
{
TM1640_send_data(3, (font[16 + tmp]));
}
else
{
TM1640_send_data(3, (font[0]));
}
tmp = ((values[0] / 10) % 10);
if(tmp >= 1)
{
TM1640_send_data(4, (font[16 + tmp]));
}
else
{
TM1640_send_data(4, (font[0]));
}
tmp = (values[0] % 10);
TM1640_send_data(5, (font[16 + tmp] | font[14]));
tmp = (values[1] / 100);
TM1640_send_data(6, (font[16 + tmp]));
TM1640_send_data(7, (font[0]));
TM1640_send_data(8, (font[0]));
TM1640_send_data(9, (font[0]));
TM1640_send_data(10, (font[84] | font[14]));
TM1640_send_data(11, (font[0]));
tmp = (values[2] / 100);
if(tmp >= 1)
{
TM1640_send_data(12, (font[16 + tmp]));
}
else
{
TM1640_send_data(12, (font[0]));
}
tmp = ((values[2] / 10) % 10);
if(tmp >= 1)
{
TM1640_send_data(13, (font[16 + tmp]));
}
else
{
TM1640_send_data(13, (font[0]));
}
tmp = (values[2] % 10);
TM1640_send_data(14, (font[16 + tmp] | font[14]));
tmp = (values[3] / 100);
TM1640_send_data(15, (font[16 + tmp]));
break;
}
}
delay_ms(1000);
}
}
void setup()
{
disable_interrupts(global);
setup_comparator(NC_NC_NC_NC);
setup_ADC(ADC_clock_div_16);
setup_ADC_ports(sAN0 | VSS_VDD);
set_ADC_channel(0);
setup_timer_0(T0_internal | T0_8_bit);
setup_timer_1(T1_disabled);
set_timer0(0);
set_timer1(0);
DHT11_init();
TM1640_init(brightness_100_pc);
}
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SShahryiar |
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Victor
Joined: 27 Oct 2003
Posts: 12
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| Posted: Fri Oct 07, 2016 9:58 pm |
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Thanks for the code. 
Recently I am struggling with TM1640, it was very unstable.
Until, I connected two 100pf ceramic caps on Data & Clk pins and 0.1uF bus cap on power, then the TM1640 become very stable.
However, some buddy feedback TM1640 will hang (eg. interference, voltage spike). The only way to reset is power off and power up again, since it don‘t have reset line. Although I have not seen this happen, but during design time, just take note of this issue.
P/s: From my experiments, the cap must be about 100pf (101) , 1000pf (102) may not work well. 10K pull up resistor may not be needed. |
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