2019.06.24

Raspberry Pi/c/lib/Config/DEV_Config.c

@@ -0,0 +1,157 @@
+/*****************************************************************************
+* | File      	:   DEV_Config.c
+* | Author      :   Waveshare team
+* | Function    :   Hardware underlying interface
+* | Info        :
+*----------------
+* |	This version:   V3.0
+* | Date        :   2019-06-20
+* | 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 the 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"
+
+#ifdef USE_BCM2835_LIB
+    #include <bcm2835.h>
+#elif USE_WIRINGPI_LIB
+    #include <wiringPi.h>
+    #include <wiringPiSPI.h>
+#endif
+
+/**
+ * GPIO read and write
+**/
+
+void DEV_Digital_Write(UWORD Pin, UBYTE Value)
+{
+#ifdef USE_BCM2835_LIB
+    bcm2835_gpio_write(Pin, Value);
+#elif USE_WIRINGPI_LIB
+    digitalWrite(Pin, Value);
+#endif
+}
+
+UBYTE DEV_Digital_Read(UWORD Pin)
+{
+    UBYTE Read_value = 0;
+#ifdef USE_BCM2835_LIB
+    Read_value = bcm2835_gpio_lev(Pin);
+#elif USE_WIRINGPI_LIB
+    Read_value = digitalRead(Pin);
+#endif
+    return Read_value;
+}
+
+/**
+ * SPI
+**/
+void DEV_SPI_WriteByte(UBYTE Value)
+{
+#ifdef USE_BCM2835_LIB
+    bcm2835_spi_transfer(Value);
+#elif USE_WIRINGPI_LIB
+    wiringPiSPIDataRW(0,&Value,1);
+#endif
+}
+
+/**
+ * delay x ms
+**/
+void DEV_Delay_ms(UDOUBLE xms)
+{
+#ifdef USE_BCM2835_LIB
+    bcm2835_delay(xms);
+#elif USE_WIRINGPI_LIB
+    delay(xms);
+#endif
+}
+
+/******************************************************************************
+function:	Module Initialize, the BCM2835 library and initialize the pins, SPI protocol
+parameter:
+Info:
+******************************************************************************/
+UBYTE DEV_Module_Init(void)
+{
+#ifdef USE_BCM2835_LIB
+    if(!bcm2835_init()) {
+        printf("bcm2835 init failed  !!! \r\n");
+        return 1;
+    } else {
+        printf("bcm2835 init success !!! \r\n");
+    }
+
+    // GPIO Config
+    bcm2835_gpio_fsel(EPD_RST_PIN, BCM2835_GPIO_FSEL_OUTP);
+    bcm2835_gpio_fsel(EPD_DC_PIN, BCM2835_GPIO_FSEL_OUTP);
+    bcm2835_gpio_fsel(EPD_CS_PIN, BCM2835_GPIO_FSEL_OUTP);
+    bcm2835_gpio_fsel(EPD_BUSY_PIN, BCM2835_GPIO_FSEL_INPT);
+
+    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_128);  //Frequency
+    bcm2835_spi_chipSelect(BCM2835_SPI_CS0);                     //set CE0
+    bcm2835_spi_setChipSelectPolarity(BCM2835_SPI_CS0, LOW);     //enable cs0
+
+#elif USE_WIRINGPI_LIB
+    //if(wiringPiSetup() < 0)//use wiringpi Pin number table
+    if(wiringPiSetupGpio() < 0) { //use BCM2835 Pin number table
+        printf("set wiringPi lib failed	!!! \r\n");
+        return 1;
+    } else {
+        printf("set wiringPi lib success !!! \r\n");
+    }
+
+    // GPIO Config
+    pinMode(EPD_RST_PIN, OUTPUT);
+    pinMode(EPD_DC_PIN, OUTPUT);
+    pinMode(EPD_CS_PIN, OUTPUT);
+    pinMode(EPD_BUSY_PIN, INPUT);
+
+    wiringPiSPISetup(0,32000000);
+    // wiringPiSPISetupMode(0, 32000000, 0);
+
+#endif
+    return 0;
+}
+
+/******************************************************************************
+function:	Module exits, closes SPI and BCM2835 library
+parameter:
+Info:
+******************************************************************************/
+void DEV_Module_Exit(void)
+{
+
+#ifdef USE_BCM2835_LIB
+    DEV_Digital_Write(EPD_CS_PIN, LOW);
+    DEV_Digital_Write(EPD_DC_PIN, LOW);
+    DEV_Digital_Write(EPD_RST_PIN, LOW);
+
+    bcm2835_spi_end();
+    bcm2835_close();
+#elif USE_WIRINGPI_LIB
+    DEV_Digital_Write(EPD_CS_PIN, 0);
+    DEV_Digital_Write(EPD_DC_PIN, 0);
+    DEV_Digital_Write(EPD_RST_PIN, 0);
+#endif
+}