3994fb1e79
It turns out that the ChibiOS K20 SPI driver doesn't handle the chip select, so it needs to be done manually. Acquiring the bus is not enough since the pin was in the wrong mode. This is now fixed. Also increase the frequency of the SPI from around 200kHz to nearly 20 Mhz.
114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
/*
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* This file is subject to the terms of the GFX License. If a copy of
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* the license was not distributed with this file, you can obtain one at:
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*
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* http://ugfx.org/license.html
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*/
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#ifndef _GDISP_LLD_BOARD_H
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#define _GDISP_LLD_BOARD_H
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#define ST7565_LCD_BIAS ST7565_LCD_BIAS_9 // actually 6
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#define ST7565_ADC ST7565_ADC_NORMAL
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#define ST7565_COM_SCAN ST7565_COM_SCAN_DEC
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#define ST7565_PAGE_ORDER 0,1,2,3
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/*
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* Custom page order for several LCD boards, e.g. HEM12864-99
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* #define ST7565_PAGE_ORDER 4,5,6,7,0,1,2,3
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*/
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#define ST7565_GPIOPORT GPIOC
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#define ST7565_PORT PORTC
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#define ST7565_A0_PIN 7
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#define ST7565_RST_PIN 8
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#define ST7565_MOSI_PIN 6
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#define ST7565_SLCK_PIN 5
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#define ST7565_SS_PIN 4
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#define palSetPadModeRaw(portname, bits) \
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ST7565_PORT->PCR[ST7565_##portname##_PIN] = bits
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#define palSetPadModeNamed(portname, portmode) \
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palSetPadMode(ST7565_GPIOPORT, ST7565_##portname##_PIN, portmode)
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#define ST7565_SPI_MODE PORTx_PCRn_DSE | PORTx_PCRn_MUX(2)
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// DSPI Clock and Transfer Attributes
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// Frame Size: 8 bits
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// MSB First
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// CLK Low by default
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static const SPIConfig spi1config = {
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// Operation complete callback or @p NULL.
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.end_cb = NULL,
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//The chip select line port - when not using pcs.
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.ssport = ST7565_GPIOPORT,
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// brief The chip select line pad number - when not using pcs.
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.sspad=ST7565_SS_PIN,
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// SPI initialization data.
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.tar0 =
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SPIx_CTARn_FMSZ(7) // Frame size = 8 bytes
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| SPIx_CTARn_ASC(1) // After SCK Delay Scaler (min 50 ns) = 55.56ns
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| SPIx_CTARn_DT(0) // Delay After Transfer Scaler (no minimum)= 27.78ns
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| SPIx_CTARn_CSSCK(0) // PCS to SCK Delay Scaler (min 20 ns) = 27.78ns
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| SPIx_CTARn_PBR(0) // Baud Rate Prescaler = 2
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| SPIx_CTARn_BR(0) // Baud rate (min 50ns) = 55.56ns
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};
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static GFXINLINE void acquire_bus(GDisplay *g) {
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(void) g;
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// Only the LCD is using the SPI bus, so no need to acquire
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// spiAcquireBus(&SPID1);
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spiSelect(&SPID1);
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}
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static GFXINLINE void release_bus(GDisplay *g) {
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(void) g;
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// Only the LCD is using the SPI bus, so no need to release
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//spiReleaseBus(&SPID1);
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spiUnselect(&SPID1);
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}
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static GFXINLINE void init_board(GDisplay *g) {
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(void) g;
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palSetPadModeNamed(A0, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPad(ST7565_GPIOPORT, ST7565_A0_PIN);
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palSetPadModeNamed(RST, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPad(ST7565_GPIOPORT, ST7565_RST_PIN);
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palSetPadModeRaw(MOSI, ST7565_SPI_MODE);
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palSetPadModeRaw(SLCK, ST7565_SPI_MODE);
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palSetPadModeRaw(SS, PAL_MODE_OUTPUT_PUSHPULL);
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spiInit();
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spiStart(&SPID1, &spi1config);
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release_bus(g);
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}
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static GFXINLINE void post_init_board(GDisplay *g) {
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(void) g;
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}
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static GFXINLINE void setpin_reset(GDisplay *g, bool_t state) {
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(void) g;
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if (state) {
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palClearPad(ST7565_GPIOPORT, ST7565_RST_PIN);
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}
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else {
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palSetPad(ST7565_GPIOPORT, ST7565_RST_PIN);
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}
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}
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static GFXINLINE void enter_data_mode(GDisplay *g) {
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palSetPad(ST7565_GPIOPORT, ST7565_A0_PIN);
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}
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static GFXINLINE void enter_cmd_mode(GDisplay *g) {
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palClearPad(ST7565_GPIOPORT, ST7565_A0_PIN);
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}
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static GFXINLINE void write_data(GDisplay *g, uint8_t* data, uint16_t length) {
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(void) g;
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spiSend(&SPID1, length, data);
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}
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#endif /* _GDISP_LLD_BOARD_H */
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