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added more arduino examples

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dekunukem
2017-12-19 12:09:32 +00:00
parent 8faba45e1c
commit d08dac0234
1 changed files with 30 additions and 18 deletions
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48
arduino_examples/show_all_digits/show_all_digits.ino
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@@ -1,23 +1,40 @@
#include <SPI.h>
#define SPI_BUF_SIZE 16
uint8_t spi_buf[SPI_BUF_SIZE];
const int slaveSelectPin = 10;
uint8_t count;
uint8_t slaveSelectPin = 10;
void print_digit(uint8_t digit)
// brightness between 0 to 127, 0 off 127 fully on
void display_digit(uint8_t digit, uint8_t brightness, uint8_t cs_pin)
{
// set the enable bit to 1
memset(spi_buf, 0x80, SPI_BUF_SIZE);
uint8_t spi_buf[SPI_BUF_SIZE];
memset(spi_buf, 0x80, SPI_BUF_SIZE); // set the EN bit of each byte to 1
spi_buf[0] = 0xaa; // first byte, header
// LED orange color
spi_buf[13] |= 127;
spi_buf[14] |= 28;
spi_buf[15] |= 0;
spi_buf[13] = 0; // LED red unchanged
spi_buf[14] = 0; // LED green unchanged
spi_buf[15] = 0; // LED blue unchanged
digit = digit % 10; // digit is now between 0 and 9
digit++; // digit is now between 1 and 10, we can use it as the index for the SPI buffer now
spi_buf[digit] |= 127; // that digit fully on
spi_buf[digit] |= brightness; // set that digit to brightness
digitalWrite(cs_pin, LOW);
for (int i = 0; i < SPI_BUF_SIZE; ++i)
SPI.transfer(spi_buf[i]);
digitalWrite(cs_pin, HIGH);
}
// color between 0 to 127, 0 off 127 fully on
void set_led(uint8_t red, uint8_t green, uint8_t blue, uint8_t cs_pin)
{
uint8_t spi_buf[SPI_BUF_SIZE];
memset(spi_buf, 0, SPI_BUF_SIZE); // clear the buffer
spi_buf[0] = 0xaa; // first byte, header
spi_buf[13] = 0x80 | red;
spi_buf[14] = 0x80 | green;
spi_buf[15] = 0x80 | blue;
digitalWrite(cs_pin, LOW);
for (int i = 0; i < SPI_BUF_SIZE; ++i)
SPI.transfer(spi_buf[i]);
digitalWrite(cs_pin, HIGH);
}
void setup()
@@ -32,12 +49,7 @@ void setup()
void loop()
{
count++;
print_digit(count);
digitalWrite(slaveSelectPin, LOW);
for (int i = 0; i < SPI_BUF_SIZE; ++i)
SPI.transfer(spi_buf[i]);
digitalWrite(slaveSelectPin, HIGH);
set_led(127, 0, 127, slaveSelectPin); // should be purple
display_digit(count, 127, slaveSelectPin);
delay(500);
}