2019.06.24

Jetson Nano/c/lib/Config/DEV_Config.c

@@ -0,0 +1,99 @@
+/*****************************************************************************
+* | File      	:   DEV_Config.c
+* | Author      :   Waveshare team
+* | Function    :   Hardware underlying interface
+* | Info        :
+*----------------
+* |	This version:   V1.0
+* | Date        :   2019-06-05
+* | 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"
+
+/******************************************************************************
+function:	Initialization pin
+parameter:
+Info:
+******************************************************************************/
+static void DEV_GPIOConfig(void)
+{
+    SYSFS_GPIO_Export(EPD_CS_PIN);
+    SYSFS_GPIO_Export(EPD_DC_PIN);
+    SYSFS_GPIO_Export(EPD_RST_PIN);
+    SYSFS_GPIO_Export(EPD_BUSY_PIN);
+
+    SYSFS_GPIO_Direction(EPD_CS_PIN, OUT);
+    SYSFS_GPIO_Direction(EPD_DC_PIN, OUT);
+    SYSFS_GPIO_Direction(EPD_RST_PIN, OUT);
+    SYSFS_GPIO_Direction(EPD_BUSY_PIN, IN);
+}
+
+void DEV_Delay_us(UWORD xus)
+{
+    for(int j=xus; j > 0; j--);
+}
+
+void DEV_Delay_ms(UWORD xms)
+{
+    for(int j=xms; j > 0; j--)
+        for(int j=xms; j > 0; j--);
+}
+
+/******************************************************************************
+function:	Module Initialize, the BCM2835 library and initialize the pins, SPI protocol
+parameter:
+Info:
+******************************************************************************/
+UBYTE DEV_Module_Init(void)
+{
+    DEV_GPIOConfig();
+    
+    SYSFS_software_spi_begin();
+    SYSFS_software_spi_setBitOrder(SOFTWARE_SPI_MSBFIRST);
+    SYSFS_software_spi_setDataMode(SOFTWARE_SPI_Mode0);
+    SYSFS_software_spi_setClockDivider(SOFTWARE_SPI_CLOCK_DIV4);
+    return 0;
+}
+
+void DEV_SPI_WriteByte(UBYTE value)
+{
+    SYSFS_software_spi_transfer(value);
+}
+
+/******************************************************************************
+function:	Module exits, closes SPI and BCM2835 library
+parameter:
+Info:
+******************************************************************************/
+void DEV_Module_Exit(void)
+{
+    SYSFS_software_spi_end(); 
+    
+    SYSFS_GPIO_Write(EPD_CS_PIN, LOW);
+    SYSFS_GPIO_Write(EPD_DC_PIN, LOW);
+    SYSFS_GPIO_Write(EPD_RST_PIN, LOW);
+
+    SYSFS_GPIO_Unexport(EPD_CS_PIN);
+    SYSFS_GPIO_Unexport(EPD_DC_PIN);
+    SYSFS_GPIO_Unexport(EPD_RST_PIN);
+    SYSFS_GPIO_Unexport(EPD_BUSY_PIN);
+}