1 | #include <stdio.h>
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2 | #include <bcm2835.h>
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3 |
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4 |
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5 | #define LS020_RS RPI_GPIO_P1_22
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6 | #define LS020_RESET RPI_GPIO_P1_18
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7 | #define LS020_CS RPI_GPIO_P1_26
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8 |
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9 |
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10 | uint16_t init_data[] =
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11 | {
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12 | 0xFDFD, 0xFDFD,
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13 | // pause
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14 |
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15 | 0xEF00, 0xEE04, 0x1B04, 0xFEFE, 0xFEFE,
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16 | 0xEF90, 0x4A04, 0x7F3F, 0xEE04, 0x4306,
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17 | // pause
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18 |
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19 | 0xEF90, 0x0983, 0x0800, 0x0BAF, 0x0A00,
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20 | 0x0500, 0x0600, 0x0700, 0xEF00, 0xEE0C,
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21 | 0xEF90, 0x0080, 0xEFB0, 0x4902, 0xEF00,
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22 | 0x7F01, 0xE181, 0xE202, 0xE276, 0xE183,
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23 | 0x8001, 0xEF90, 0x0000
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24 | };
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25 |
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26 |
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27 |
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28 | inline void setOutput(int pin, int state)
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29 | {
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30 | if(state == HIGH)
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31 | bcm2835_gpio_write(pin,HIGH);
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32 | else
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33 | bcm2835_gpio_write(pin, LOW);
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34 | }
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35 |
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36 | void LCD_sendCommand(uint16_t command)
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37 | {
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38 | setOutput(LS020_RS, HIGH); //to command mode
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39 | bcm2835_spi_transfer((command>>8)&&0xff);
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40 | bcm2835_spi_transfer(command & 0xff);
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41 | setOutput(LS020_RS, LOW);
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42 |
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43 | }
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44 |
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45 |
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46 | void LCD_sendBlockCommand(uint16_t commands[], int len)
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47 | {
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48 |
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49 |
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50 | setOutput(LS020_RS, HIGH); //to command mode
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51 | uint8_t * c_p = (uint8_t*) commands;
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52 | bcm2835_spi_transfern(c_p, len*2);
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53 | setOutput(LS020_RS, LOW);
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54 | }
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55 |
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56 | int main()
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57 | {
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58 |
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59 |
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60 |
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61 | printf("Start LS020 Display test\n");
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62 | if(!bcm2835_init())
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63 | {
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64 | printf("GPIO Init failed\n");
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65 | return 1;
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66 | }
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67 |
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68 | printf("Start GPIO init\n");
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69 | bcm2835_gpio_fsel(LS020_RS, BCM2835_GPIO_FSEL_OUTP);
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70 | bcm2835_gpio_fsel(LS020_RESET, BCM2835_GPIO_FSEL_OUTP);
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71 | //bcm2835_gpio_fsel(LS020_CS, BCM2835_GPIO_FSEL_OUTP);
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72 |
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73 | printf("Start SPI init\n");
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74 | bcm2835_spi_begin();
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75 | bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST); // The default
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76 | bcm2835_spi_setDataMode(BCM2835_SPI_MODE0); // The default
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77 | bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_32); // 8 MHz
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78 | bcm2835_spi_chipSelect(BCM2835_SPI_CS2); // The default
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79 | bcm2835_spi_setChipSelectPolarity(BCM2835_SPI_CS2, LOW); // the default
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80 |
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81 |
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82 | setOutput(LS020_RS, LOW);
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83 | setOutput(LS020_RESET, LOW);
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84 | delay(100);
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85 | setOutput(LS020_RESET, HIGH);
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86 |
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87 | LCD_sendBlockCommand(init_data,2); delay(50);
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88 | LCD_sendBlockCommand(init_data+2,10); delay(7);
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89 | LCD_sendBlockCommand(init_data+12,20); //delay(50);
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90 | LCD_sendBlockCommand(init_data+32,3); delay(50);
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91 |
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92 | delay(10000);
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93 | bcm2835_spi_end();
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94 |
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95 | }
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