Inkycal/inkycal/display/drivers/parallel_drivers/lib/Config/DEV_Config.c
2022-04-10 02:48:40 +02:00

177 lines
5.1 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/*****************************************************************************
* | 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();
}