| 0,0 → 1,152 |
|---|
| #include "maindefs.h" |
| #include "led_driver.h" |
| #include "delays.h" |
| |
| /* Output Pins: |
| * RA0 - LED Display Latch Enable (PPS) |
| * RA1 - LED Display CLK (PPS) |
| * RA2 - LED Display DIN (PPS) |
| * RA3 - LED Display Output Enable (PPS) |
| */ |
| |
| void led_driver_init() { |
| TRISAbits.TRISA0 = 0; // LE |
| TRISAbits.TRISA1 = 0; // CLK |
| TRISAbits.TRISA2 = 0; // DAT |
| TRISAbits.TRISA3 = 0; // OE |
| |
| LATAbits.LATA0 = 0; // LE |
| LATAbits.LATA1 = 0; // CLK |
| LATAbits.LATA2 = 0; // DAT |
| LATAbits.LATA3 = 0; // OE |
| |
| led_driver_data(0,0); |
| } |
| |
| void led_driver_clock() { |
| LATAbits.LATA1 = 0x1; // Simple clock output toggle |
| Nop(); |
| LATAbits.LATA1 = 0x0; |
| Nop(); |
| } |
| |
| void led_driver_data(char left, char right) { |
| int i; |
| LATAbits.LATA0 = 0x0; // Set latch low to pause display |
| for (i = 0; i < 8; i++) { |
| LATAbits.LATA2 = right & 0x1; // Shift out right character first |
| led_driver_clock(); |
| right >>= 1; |
| } |
| for (i = 0; i < 8; i++) { |
| LATAbits.LATA2 = left & 0x1; // Then shift out left character |
| led_driver_clock(); |
| left >>= 1; |
| } |
| LATAbits.LATA0 = 0x1; // Set latch high to resume display |
| } |
| |
| void led_driver_num(unsigned char data) { |
| unsigned char left = 0; |
| unsigned char right = 0; |
| unsigned char tmp = 0; |
| |
| // if (data > 99) { |
| // led_driver_data(0,0); |
| // return; |
| // } |
| |
| // Determine right character (1s digit) |
| tmp = data % 10; |
| switch (tmp) { |
| case 0: |
| right = LED_CHAR_0; |
| break; |
| case 1: |
| right = LED_CHAR_1; |
| break; |
| case 2: |
| right = LED_CHAR_2; |
| break; |
| case 3: |
| right = LED_CHAR_3; |
| break; |
| case 4: |
| right = LED_CHAR_4; |
| break; |
| case 5: |
| right = LED_CHAR_5; |
| break; |
| case 6: |
| right = LED_CHAR_6; |
| break; |
| case 7: |
| right = LED_CHAR_7; |
| break; |
| case 8: |
| right = LED_CHAR_8; |
| break; |
| case 9: |
| right = LED_CHAR_9; |
| break; |
| } |
| |
| // Determine left character (10s digit) |
| tmp = data / 10; |
| switch (tmp) { |
| case 0: |
| left = LED_CHAR_0; |
| break; |
| case 1: |
| left = LED_CHAR_1; |
| break; |
| case 2: |
| left = LED_CHAR_2; |
| break; |
| case 3: |
| left = LED_CHAR_3; |
| break; |
| case 4: |
| left = LED_CHAR_4; |
| break; |
| case 5: |
| left = LED_CHAR_5; |
| break; |
| case 6: |
| left = LED_CHAR_6; |
| break; |
| case 7: |
| left = LED_CHAR_7; |
| break; |
| case 8: |
| left = LED_CHAR_8; |
| break; |
| case 9: |
| left = LED_CHAR_9; |
| break; |
| } |
| |
| led_driver_data(left, right); |
| |
| // if (data <= 25) { |
| // led_driver_data(LED_CHAR_BLANK,LED_CHAR_0); |
| // } else if (data > 25 && data <= 50) { |
| // led_driver_data(LED_CHAR_BLANK,LED_CHAR_1); |
| // } else if (data > 50 && data <= 75) { |
| // led_driver_data(LED_CHAR_BLANK,LED_CHAR_2); |
| // } else if (data > 75 && data <= 100) { |
| // led_driver_data(LED_CHAR_BLANK,LED_CHAR_3); |
| // } else if (data > 100 && data <= 125) { |
| // led_driver_data(LED_CHAR_BLANK,LED_CHAR_4); |
| // } else if (data > 125 && data <= 150) { |
| // led_driver_data(LED_CHAR_BLANK,LED_CHAR_5); |
| // } else if (data > 150 && data <= 175) { |
| // led_driver_data(LED_CHAR_BLANK,LED_CHAR_6); |
| // } else if (data > 175 && data <= 200) { |
| // led_driver_data(LED_CHAR_BLANK,LED_CHAR_7); |
| // } else if (data > 200 && data <= 225) { |
| // led_driver_data(LED_CHAR_BLANK,LED_CHAR_8); |
| // } else { |
| // led_driver_data(LED_CHAR_BLANK,LED_CHAR_9); |
| // } |
| } |