use It8951 files

inkycal/display/drivers/parallel_drivers/lib/Config/DEV_Config.c

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+/*****************************************************************************
+* | File      	:   DEV_Config.c
+* | Author      :   Waveshare team
+* | Function    :   Hardware underlying interface
+* | Info        :
+*----------------
+* |	This version:   V3.0
+* | Date        :   2019-09-17
+* | Info        :   
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documnetation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of theex Software, and to permit persons to  whom the Software is
+# furished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+******************************************************************************/
+#include "DEV_Config.h"
+#include <fcntl.h>
+
+
+/******************************************************************************
+function:	GPIO Write
+parameter:
+Info:
+******************************************************************************/
+void DEV_Digital_Write(UWORD Pin, UBYTE Value)
+{
+	bcm2835_gpio_write(Pin, Value);
+}
+
+/******************************************************************************
+function:	GPIO Read
+parameter:
+Info:
+******************************************************************************/
+UBYTE DEV_Digital_Read(UWORD Pin)
+{
+	UBYTE Read_Value = 0;
+	Read_Value = bcm2835_gpio_lev(Pin);
+	return Read_Value;
+}
+
+/******************************************************************************
+function:	SPI Write
+parameter:
+Info:
+******************************************************************************/
+void DEV_SPI_WriteByte(UBYTE Value)
+{
+	bcm2835_spi_transfer(Value);
+}
+
+/******************************************************************************
+function:	SPI Read
+parameter:
+Info:
+******************************************************************************/
+UBYTE DEV_SPI_ReadByte()
+{
+	UBYTE Read_Value = 0x00;
+	Read_Value = bcm2835_spi_transfer(0x00);
+	return Read_Value;
+}
+
+/******************************************************************************
+function:	Time delay for ms
+parameter:
+Info:
+******************************************************************************/
+void DEV_Delay_ms(UDOUBLE xms)
+{
+	bcm2835_delay(xms);
+}
+
+
+/******************************************************************************
+function:	Time delay for us
+parameter:
+Info:
+******************************************************************************/
+void DEV_Delay_us(UDOUBLE xus)
+{
+	bcm2835_delayMicroseconds(xus);
+}
+
+
+
+
+
+
+/**
+ * GPIO Mode
+**/
+static void DEV_GPIO_Mode(UWORD Pin, UWORD Mode)
+{
+	if(Mode == 0 || Mode == BCM2835_GPIO_FSEL_INPT) {
+		bcm2835_gpio_fsel(Pin, BCM2835_GPIO_FSEL_INPT);
+	} else {
+		bcm2835_gpio_fsel(Pin, BCM2835_GPIO_FSEL_OUTP);
+	}
+}
+
+
+/**
+ * GPIO Init
+**/
+static void DEV_GPIO_Init(void)
+{
+	DEV_GPIO_Mode(EPD_RST_PIN, BCM2835_GPIO_FSEL_OUTP);
+	DEV_GPIO_Mode(EPD_CS_PIN, BCM2835_GPIO_FSEL_OUTP);
+	DEV_GPIO_Mode(EPD_BUSY_PIN, BCM2835_GPIO_FSEL_INPT);
+
+	DEV_Digital_Write(EPD_CS_PIN, HIGH);
+}
+
+
+
+/******************************************************************************
+function:	Module Initialize, the library and initialize the pins, SPI protocol
+parameter:
+Info:
+******************************************************************************/
+UBYTE DEV_Module_Init(void)
+{
+    Debug("/***********************************/ \r\n");
+
+	if(!bcm2835_init()) {
+		Debug("bcm2835 init failed  !!! \r\n");
+		return 1;
+	} else {
+		Debug("bcm2835 init success !!! \r\n");
+	}
+
+	bcm2835_spi_begin();                                         //Start spi interface, set spi pin for the reuse function
+	bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST);     //High first transmission
+	bcm2835_spi_setDataMode(BCM2835_SPI_MODE0);                  //spi mode 0
+	//bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_16);   //For RPi3/3B/3B+
+	bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_32);   //For RPi 4
+	/* SPI clock reference link：*/
+	/*http://www.airspayce.com/mikem/bcm2835/group__constants.html#gaf2e0ca069b8caef24602a02e8a00884e*/
+
+	//GPIO Config
+	DEV_GPIO_Init();
+
+    Debug("/***********************************/ \r\n");
+	return 0;
+}
+
+
+
+/******************************************************************************
+function:	Module exits, closes SPI and BCM2835 library
+parameter:
+Info:
+******************************************************************************/
+void DEV_Module_Exit(void)
+{
+	DEV_Digital_Write(EPD_CS_PIN, LOW);
+	DEV_Digital_Write(EPD_RST_PIN, LOW);
+
+	bcm2835_spi_end();
+	bcm2835_close();
+}