keyboards/ergodox_infinity/board_st7565.h

   1 /*
   2  * This file is subject to the terms of the GFX License. If a copy of
   3  * the license was not distributed with this file, you can obtain one at:
   4  *
   5  *              http://ugfx.org/license.html
   6  */
   7
   8 #ifndef _GDISP_LLD_BOARD_H
   9 #define _GDISP_LLD_BOARD_H
  10
  11 #define ST7565_LCD_BIAS         ST7565_LCD_BIAS_9 // actually 6
  12 #define ST7565_ADC              ST7565_ADC_NORMAL
  13 #define ST7565_COM_SCAN         ST7565_COM_SCAN_DEC
  14 #define ST7565_PAGE_ORDER       0,1,2,3
  15 /*
  16  * Custom page order for several LCD boards, e.g. HEM12864-99
  17  * #define ST7565_PAGE_ORDER       4,5,6,7,0,1,2,3
  18  */
  19
  20 #define ST7565_GPIOPORT GPIOC
  21 #define ST7565_PORT PORTC
  22 #define ST7565_A0_PIN 7
  23 #define ST7565_RST_PIN 8
  24 #define ST7565_MOSI_PIN 6
  25 #define ST7565_SLCK_PIN 5
  26 #define ST7565_SS_PIN 4
  27
  28 #define palSetPadModeRaw(portname, bits) \
  29     ST7565_PORT->PCR[ST7565_##portname##_PIN] = bits
  30
  31 #define palSetPadModeNamed(portname, portmode) \
  32     palSetPadMode(ST7565_GPIOPORT, ST7565_##portname##_PIN, portmode)
  33
  34 #define ST7565_SPI_MODE PORTx_PCRn_DSE | PORTx_PCRn_MUX(2)
  35 // DSPI Clock and Transfer Attributes
  36 // Frame Size: 8 bits
  37 // MSB First
  38 // CLK Low by default
  39 static const SPIConfig spi1config = {
  40    // Operation complete callback or @p NULL.
  41   .end_cb = NULL,
  42    //The chip select line port - when not using pcs.
  43   .ssport = ST7565_GPIOPORT,
  44    // brief The chip select line pad number - when not using pcs.
  45   .sspad=ST7565_SS_PIN,
  46    // SPI initialization data.
  47   .tar0 =
  48     SPIx_CTARn_FMSZ(7) // Frame size = 8 bytes
  49     | SPIx_CTARn_ASC(1) // After SCK Delay Scaler (min 50 ns) = 55.56ns
  50     | SPIx_CTARn_DT(0) // Delay After Transfer Scaler (no minimum)= 27.78ns
  51     | SPIx_CTARn_CSSCK(0) // PCS to SCK Delay Scaler (min 20 ns) = 27.78ns
  52     | SPIx_CTARn_PBR(0) // Baud Rate Prescaler = 2
  53     | SPIx_CTARn_BR(0) // Baud rate (min 50ns) = 55.56ns
  54 };
  55
  56 static GFXINLINE void acquire_bus(GDisplay *g) {
  57     (void) g;
  58     // Only the LCD is using the SPI bus, so no need to acquire
  59     // spiAcquireBus(&SPID1);
  60     spiSelect(&SPID1);
  61 }
  62
  63 static GFXINLINE void release_bus(GDisplay *g) {
  64     (void) g;
  65     // Only the LCD is using the SPI bus, so no need to release
  66     //spiReleaseBus(&SPID1);
  67     spiUnselect(&SPID1);
  68 }
  69
  70 static GFXINLINE void init_board(GDisplay *g) {
  71     (void) g;
  72     palSetPadModeNamed(A0, PAL_MODE_OUTPUT_PUSHPULL);
  73     palSetPad(ST7565_GPIOPORT, ST7565_A0_PIN);
  74     palSetPadModeNamed(RST, PAL_MODE_OUTPUT_PUSHPULL);
  75     palSetPad(ST7565_GPIOPORT, ST7565_RST_PIN);
  76     palSetPadModeRaw(MOSI, ST7565_SPI_MODE);
  77     palSetPadModeRaw(SLCK, ST7565_SPI_MODE);
  78     palSetPadModeNamed(SS, PAL_MODE_OUTPUT_PUSHPULL);
  79
  80     spiInit();
  81     spiStart(&SPID1, &spi1config);
  82     release_bus(g);
  83 }
  84
  85 static GFXINLINE void post_init_board(GDisplay *g) {
  86     (void) g;
  87 }
  88
  89 static GFXINLINE void setpin_reset(GDisplay *g, bool_t state) {
  90     (void) g;
  91     if (state) {
  92         palClearPad(ST7565_GPIOPORT, ST7565_RST_PIN);
  93     }
  94     else {
  95         palSetPad(ST7565_GPIOPORT, ST7565_RST_PIN);
  96     }
  97 }
  98
  99 static GFXINLINE void enter_data_mode(GDisplay *g) {
 100     palSetPad(ST7565_GPIOPORT, ST7565_A0_PIN);
 101 }
 102
 103 static GFXINLINE void enter_cmd_mode(GDisplay *g) {
 104     palClearPad(ST7565_GPIOPORT, ST7565_A0_PIN);
 105 }
 106
 107
 108 static GFXINLINE void write_data(GDisplay *g, uint8_t* data, uint16_t length) {
 109     (void) g;
 110     spiSend(&SPID1, length, data);
 111 }
 112
 113 #endif /* _GDISP_LLD_BOARD_H */