You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
439 lines
11 KiB
439 lines
11 KiB
/*
|
|
|
|
u8g_com_arduino_hw_spi.c
|
|
|
|
Universal 8bit Graphics Library
|
|
|
|
Copyright (c) 2011, olikraus@gmail.com
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without modification,
|
|
are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright notice, this list
|
|
of conditions and the following disclaimer.
|
|
|
|
* Redistributions in binary form must reproduce the above copyright notice, this
|
|
list of conditions and the following disclaimer in the documentation and/or other
|
|
materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
|
|
CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
|
|
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
SPI Clock Cycle Type
|
|
|
|
SSD1351 50ns 20 MHz
|
|
SSD1322 300ns 3.3 MHz
|
|
SSD1327 300ns
|
|
SSD1306 300ns
|
|
ST7565 400ns 2.5 MHz
|
|
ST7920 400ns
|
|
|
|
Arduino DUE
|
|
|
|
PA25 MISO
|
|
PA26 MOSI 75
|
|
PA27 SCLK 76
|
|
|
|
|
|
typedef struct {
|
|
WoReg SPI_CR; (Spi Offset: 0x00) Control Register
|
|
RwReg SPI_MR; (Spi Offset: 0x04) Mode Register
|
|
RoReg SPI_RDR; (Spi Offset: 0x08) Receive Data Register
|
|
WoReg SPI_TDR; (Spi Offset: 0x0C) Transmit Data Register
|
|
RoReg SPI_SR; (Spi Offset: 0x10) Status Register
|
|
WoReg SPI_IER; (Spi Offset: 0x14) Interrupt Enable Register
|
|
WoReg SPI_IDR; (Spi Offset: 0x18) Interrupt Disable Register
|
|
RoReg SPI_IMR; (Spi Offset: 0x1C) Interrupt Mask Register
|
|
RoReg Reserved1[4];
|
|
RwReg SPI_CSR[4]; (Spi Offset: 0x30) Chip Select Register
|
|
RoReg Reserved2[41];
|
|
RwReg SPI_WPMR; (Spi Offset: 0xE4) Write Protection Control Register
|
|
RoReg SPI_WPSR; (Spi Offset: 0xE8) Write Protection Status Register
|
|
} Spi;
|
|
|
|
Power Management Controller (PMC)
|
|
arduino-1.5.2/hardware/arduino/sam/system/CMSIS/Device/ATMEL/sam3xa/include/instance/instance_pmc.h
|
|
- enable PIO
|
|
|
|
REG_PMC_PCER0 = 1UL << ID_PIOA
|
|
- enable SPI
|
|
REG_PMC_PCER0 = 1UL << ID_SPI0
|
|
|
|
|
|
- enable PIOA and SPI0
|
|
REG_PMC_PCER0 = (1UL << ID_PIOA) | (1UL << ID_SPI0);
|
|
|
|
Parallel Input/Output Controller (PIO)
|
|
arduino-1.5.2/hardware/arduino/sam/system/CMSIS/Device/ATMEL/sam3xa/include/instance/instance_pioa.h
|
|
- enable special function of the pin: disable PIO on A26 and A27:
|
|
REG_PIOA_PDR = 0x0c000000
|
|
PIOA->PIO_PDR = 0x0c000000
|
|
|
|
SPI
|
|
SPI0->SPI_CR = SPI_CR_SPIDIS
|
|
SPI0->SPI_CR = SPI_CR_SWRST ;
|
|
SPI0->SPI_CR = SPI_CR_SWRST ;
|
|
SPI0->SPI_CR = SPI_CR_SPIEN
|
|
|
|
Bit 0: Master Mode = 1 (active)
|
|
Bit 1: Peripheral Select = 0 (fixed)
|
|
Bit 2: Chip Select Decode Mode = 1 (4 to 16)
|
|
Bit 4: Mode Fault Detection = 1 (disabled)
|
|
Bit 5: Wait Data Read = 0 (disabled)
|
|
Bit 7: Loop Back Mode = 0 (disabled)
|
|
Bit 16-19: Peripheral Chip Select = 0 (chip select 0)
|
|
SPI0->SPI_MR = SPI_MR_MSTR | SPI_MR_PCSDEC | SPI_MR_MODFDIS
|
|
|
|
Bit 0: Clock Polarity = 0
|
|
Bit 1: Clock Phase = 0
|
|
Bit 4-7: Bits = 0 (8 Bit)
|
|
Bit 8-15: SCBR = 1
|
|
SPI0->SPI_CSR[0] = SPI_CSR_SCBR(x) Serial Baud Rate
|
|
SCBR / 84000000 > 50 / 1000000000
|
|
SCBR / 84 > 5 / 100
|
|
SCBR > 50 *84 / 1000 --> SCBR=5
|
|
SCBR > 300*84 / 1000 --> SCBR=26
|
|
SCBR > 400*84 / 1000 --> SCBR=34
|
|
|
|
Arduino Due test code:
|
|
REG_PMC_PCER0 = (1UL << ID_PIOA) | (1UL << ID_SPI0);
|
|
REG_PIOA_PDR = 0x0c000000;
|
|
SPI0->SPI_CR = SPI_CR_SPIDIS;
|
|
SPI0->SPI_CR = SPI_CR_SWRST;
|
|
SPI0->SPI_CR = SPI_CR_SWRST;
|
|
SPI0->SPI_CR = SPI_CR_SPIEN;
|
|
SPI0->SPI_MR = SPI_MR_MSTR | SPI_MR_PCSDEC | SPI_MR_MODFDIS;
|
|
SPI0->SPI_CSR[0] = SPI_CSR_SCBR(30);
|
|
|
|
for(;;)
|
|
{
|
|
while( (SPI0->SPI_SR & SPI_SR_TDRE) == 0 )
|
|
;
|
|
SPI0->SPI_TDR = 0x050;
|
|
}
|
|
|
|
*/
|
|
|
|
#include "u8g.h"
|
|
|
|
#if defined(ARDUINO)
|
|
|
|
#if defined(__AVR__)
|
|
#define U8G_ARDUINO_ATMEGA_HW_SPI
|
|
/* remove the definition for attiny */
|
|
#if __AVR_ARCH__ == 2
|
|
#undef U8G_ARDUINO_ATMEGA_HW_SPI
|
|
#endif
|
|
#if __AVR_ARCH__ == 25
|
|
#undef U8G_ARDUINO_ATMEGA_HW_SPI
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(U8G_ARDUINO_ATMEGA_HW_SPI)
|
|
|
|
#include <avr/interrupt.h>
|
|
#include <avr/io.h>
|
|
|
|
#if ARDUINO < 100
|
|
#include <WProgram.h>
|
|
|
|
/* fixed pins */
|
|
#if defined(__AVR_ATmega644P__) || defined(__AVR_ATmega1284P__) // Sanguino.cc board
|
|
#define PIN_SCK 7
|
|
#define PIN_MISO 6
|
|
#define PIN_MOSI 5
|
|
#define PIN_CS 4
|
|
#else // Arduino Board
|
|
#define PIN_SCK 13
|
|
#define PIN_MISO 12
|
|
#define PIN_MOSI 11
|
|
#define PIN_CS 10
|
|
#endif // (__AVR_ATmega644P__) || defined(__AVR_ATmega1284P__)
|
|
|
|
#else
|
|
|
|
#include <Arduino.h>
|
|
|
|
/* use Arduino pin definitions */
|
|
#define PIN_SCK SCK
|
|
#define PIN_MISO MISO
|
|
#define PIN_MOSI MOSI
|
|
#define PIN_CS SS
|
|
|
|
#endif
|
|
|
|
|
|
|
|
//static uint8_t u8g_spi_out(uint8_t data) U8G_NOINLINE;
|
|
static uint8_t u8g_spi_out(uint8_t data)
|
|
{
|
|
/* unsigned char x = 100; */
|
|
/* send data */
|
|
SPDR = data;
|
|
/* wait for transmission */
|
|
while (!(SPSR & (1<<SPIF)))
|
|
;
|
|
/* clear the SPIF flag by reading SPDR */
|
|
return SPDR;
|
|
}
|
|
|
|
|
|
uint8_t u8g_com_arduino_hw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
|
|
{
|
|
switch(msg)
|
|
{
|
|
case U8G_COM_MSG_STOP:
|
|
break;
|
|
|
|
case U8G_COM_MSG_INIT:
|
|
u8g_com_arduino_assign_pin_output_high(u8g);
|
|
pinMode(PIN_SCK, OUTPUT);
|
|
digitalWrite(PIN_SCK, LOW);
|
|
pinMode(PIN_MOSI, OUTPUT);
|
|
digitalWrite(PIN_MOSI, LOW);
|
|
/* pinMode(PIN_MISO, INPUT); */
|
|
|
|
pinMode(PIN_CS, OUTPUT); /* system chip select for the atmega board */
|
|
digitalWrite(PIN_CS, HIGH);
|
|
|
|
|
|
|
|
/*
|
|
SPR1 SPR0
|
|
0 0 fclk/4
|
|
0 1 fclk/16
|
|
1 0 fclk/64
|
|
1 1 fclk/128
|
|
*/
|
|
SPCR = 0;
|
|
SPCR = (1<<SPE) | (1<<MSTR)|(0<<SPR1)|(0<<SPR0)|(0<<CPOL)|(0<<CPHA);
|
|
#ifdef U8G_HW_SPI_2X
|
|
SPSR = (1 << SPI2X); /* double speed, issue 89 */
|
|
#else
|
|
if ( arg_val <= U8G_SPI_CLK_CYCLE_50NS )
|
|
{
|
|
SPSR = (1 << SPI2X); /* double speed, issue 89 */
|
|
}
|
|
#endif
|
|
|
|
|
|
break;
|
|
|
|
case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
|
|
u8g_com_arduino_digital_write(u8g, U8G_PI_A0, arg_val);
|
|
break;
|
|
|
|
case U8G_COM_MSG_CHIP_SELECT:
|
|
if ( arg_val == 0 )
|
|
{
|
|
/* disable */
|
|
u8g_com_arduino_digital_write(u8g, U8G_PI_CS, HIGH);
|
|
}
|
|
else
|
|
{
|
|
/* enable */
|
|
u8g_com_arduino_digital_write(u8g, U8G_PI_SCK, LOW);
|
|
u8g_com_arduino_digital_write(u8g, U8G_PI_CS, LOW);
|
|
}
|
|
break;
|
|
|
|
case U8G_COM_MSG_RESET:
|
|
if ( u8g->pin_list[U8G_PI_RESET] != U8G_PIN_NONE )
|
|
u8g_com_arduino_digital_write(u8g, U8G_PI_RESET, arg_val);
|
|
break;
|
|
|
|
case U8G_COM_MSG_WRITE_BYTE:
|
|
u8g_spi_out(arg_val);
|
|
break;
|
|
|
|
case U8G_COM_MSG_WRITE_SEQ:
|
|
{
|
|
register uint8_t *ptr = arg_ptr;
|
|
while( arg_val > 0 )
|
|
{
|
|
u8g_spi_out(*ptr++);
|
|
arg_val--;
|
|
}
|
|
}
|
|
break;
|
|
case U8G_COM_MSG_WRITE_SEQ_P:
|
|
{
|
|
register uint8_t *ptr = arg_ptr;
|
|
while( arg_val > 0 )
|
|
{
|
|
u8g_spi_out(u8g_pgm_read(ptr));
|
|
ptr++;
|
|
arg_val--;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* #elif defined(__18CXX) || defined(__PIC32MX) */
|
|
|
|
#elif defined(__SAM3X8E__) // Arduino Due, maybe we should better check for __SAM3X8E__
|
|
|
|
#include <Arduino.h>
|
|
|
|
/* use Arduino pin definitions */
|
|
#define PIN_SCK SCK
|
|
#define PIN_MISO MISO
|
|
#define PIN_MOSI MOSI
|
|
#define PIN_CS SS
|
|
|
|
|
|
static uint8_t u8g_spi_out(uint8_t data)
|
|
{
|
|
/* wait until tx register is empty */
|
|
while( (SPI0->SPI_SR & SPI_SR_TDRE) == 0 )
|
|
;
|
|
/* send data */
|
|
SPI0->SPI_TDR = (uint32_t)data;
|
|
return data;
|
|
}
|
|
|
|
|
|
uint8_t u8g_com_arduino_hw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
|
|
{
|
|
switch(msg)
|
|
{
|
|
case U8G_COM_MSG_STOP:
|
|
break;
|
|
|
|
case U8G_COM_MSG_INIT:
|
|
u8g_com_arduino_assign_pin_output_high(u8g);
|
|
u8g_com_arduino_digital_write(u8g, U8G_PI_CS, HIGH);
|
|
|
|
/* Arduino Due specific code */
|
|
|
|
/* enable PIOA and SPI0 */
|
|
REG_PMC_PCER0 = (1UL << ID_PIOA) | (1UL << ID_SPI0);
|
|
|
|
/* disable PIO on A26 and A27 */
|
|
REG_PIOA_PDR = 0x0c000000;
|
|
|
|
/* reset SPI0 (from sam lib) */
|
|
SPI0->SPI_CR = SPI_CR_SPIDIS;
|
|
SPI0->SPI_CR = SPI_CR_SWRST;
|
|
SPI0->SPI_CR = SPI_CR_SWRST;
|
|
SPI0->SPI_CR = SPI_CR_SPIEN;
|
|
u8g_MicroDelay();
|
|
|
|
/* master mode, no fault detection, chip select 0 */
|
|
SPI0->SPI_MR = SPI_MR_MSTR | SPI_MR_PCSDEC | SPI_MR_MODFDIS;
|
|
|
|
/* Polarity, Phase, 8 Bit data transfer, baud rate */
|
|
/* x * 1000 / 84 --> clock cycle in ns
|
|
5 * 1000 / 84 = 58 ns
|
|
SCBR > 50 *84 / 1000 --> SCBR=5
|
|
SCBR > 300*84 / 1000 --> SCBR=26
|
|
SCBR > 400*84 / 1000 --> SCBR=34
|
|
*/
|
|
|
|
if ( arg_val <= U8G_SPI_CLK_CYCLE_50NS )
|
|
{
|
|
SPI0->SPI_CSR[0] = SPI_CSR_SCBR(5) | 1;
|
|
}
|
|
else if ( arg_val <= U8G_SPI_CLK_CYCLE_300NS )
|
|
{
|
|
SPI0->SPI_CSR[0] = SPI_CSR_SCBR(26) | 1;
|
|
}
|
|
else if ( arg_val <= U8G_SPI_CLK_CYCLE_400NS )
|
|
{
|
|
SPI0->SPI_CSR[0] = SPI_CSR_SCBR(34) | 1;
|
|
}
|
|
else
|
|
{
|
|
SPI0->SPI_CSR[0] = SPI_CSR_SCBR(84) | 1;
|
|
}
|
|
|
|
u8g_MicroDelay();
|
|
break;
|
|
|
|
case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
|
|
u8g_com_arduino_digital_write(u8g, U8G_PI_A0, arg_val);
|
|
u8g_MicroDelay();
|
|
break;
|
|
|
|
case U8G_COM_MSG_CHIP_SELECT:
|
|
if ( arg_val == 0 )
|
|
{
|
|
/* disable */
|
|
u8g_MicroDelay(); /* this delay is required to avoid that the display is switched off too early --> DOGS102 with DUE */
|
|
u8g_com_arduino_digital_write(u8g, U8G_PI_CS, HIGH);
|
|
u8g_MicroDelay();
|
|
}
|
|
else
|
|
{
|
|
/* enable */
|
|
//u8g_com_arduino_digital_write(u8g, U8G_PI_SCK, LOW);
|
|
u8g_com_arduino_digital_write(u8g, U8G_PI_CS, LOW);
|
|
u8g_MicroDelay();
|
|
}
|
|
break;
|
|
|
|
case U8G_COM_MSG_RESET:
|
|
if ( u8g->pin_list[U8G_PI_RESET] != U8G_PIN_NONE )
|
|
u8g_com_arduino_digital_write(u8g, U8G_PI_RESET, arg_val);
|
|
break;
|
|
|
|
case U8G_COM_MSG_WRITE_BYTE:
|
|
u8g_spi_out(arg_val);
|
|
u8g_MicroDelay();
|
|
break;
|
|
|
|
case U8G_COM_MSG_WRITE_SEQ:
|
|
{
|
|
register uint8_t *ptr = arg_ptr;
|
|
while( arg_val > 0 )
|
|
{
|
|
u8g_spi_out(*ptr++);
|
|
arg_val--;
|
|
}
|
|
}
|
|
break;
|
|
case U8G_COM_MSG_WRITE_SEQ_P:
|
|
{
|
|
register uint8_t *ptr = arg_ptr;
|
|
while( arg_val > 0 )
|
|
{
|
|
u8g_spi_out(u8g_pgm_read(ptr));
|
|
ptr++;
|
|
arg_val--;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
|
|
#else /* U8G_ARDUINO_ATMEGA_HW_SPI */
|
|
|
|
#endif /* U8G_ARDUINO_ATMEGA_HW_SPI */
|
|
|
|
#else /* ARDUINO */
|
|
|
|
uint8_t u8g_com_arduino_hw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
#endif /* ARDUINO */
|
|
|