void u8g_com_arduino_parallel_write(u8g_t *u8g, uint8_t val)
{
u8g_com_arduino_digital_write(u8g, U8G_PI_D0, val&1);
val >>= 1;
u8g_com_arduino_digital_write(u8g, U8G_PI_D1, val&1);
val >>= 1;
u8g_com_arduino_digital_write(u8g, U8G_PI_D2, val&1);
val >>= 1;
u8g_com_arduino_digital_write(u8g, U8G_PI_D3, val&1);
val >>= 1;
u8g_com_arduino_digital_write(u8g, U8G_PI_D4, val&1);
val >>= 1;
u8g_com_arduino_digital_write(u8g, U8G_PI_D5, val&1);
val >>= 1;
u8g_com_arduino_digital_write(u8g, U8G_PI_D6, val&1);
val >>= 1;
u8g_com_arduino_digital_write(u8g, U8G_PI_D7, val&1);
/* EN cycle time must be 1 micro second, digitalWrite is slow enough to do this */
u8g_Delay(1);
u8g_com_arduino_digital_write(u8g, U8G_PI_EN, HIGH);
u8g_Delay(1);
u8g_MicroDelay(); /* delay by 1000ns, reference: ST7920: 140ns, SBN1661: 100ns */
u8g_com_arduino_digital_write(u8g, U8G_PI_EN, LOW);
u8g_10MicroDelay(); /* ST7920 commands: 72us */
u8g_Delay(2);
}
static void u8g_com_arduino_t6963_write(u8g_t *u8g, uint8_t val)
{
U8G_ATOMIC_START();
u8g_com_arduino_t6963_write_data_pin( 0, val&1 );
val >>= 1;
u8g_com_arduino_t6963_write_data_pin( 1, val&1 );
val >>= 1;
u8g_com_arduino_t6963_write_data_pin( 2, val&1 );
val >>= 1;
u8g_com_arduino_t6963_write_data_pin( 3, val&1 );
val >>= 1;
u8g_com_arduino_t6963_write_data_pin( 4, val&1 );
val >>= 1;
u8g_com_arduino_t6963_write_data_pin( 5, val&1 );
val >>= 1;
u8g_com_arduino_t6963_write_data_pin( 6, val&1 );
val >>= 1;
u8g_com_arduino_t6963_write_data_pin( 7, val&1 );
val >>= 1;
U8G_ATOMIC_END();
u8g_com_arduino_digital_write(u8g, U8G_PI_WR, 0);
u8g_MicroDelay(); /* 80ns, reference: t6963 datasheet */
u8g_com_arduino_digital_write(u8g, U8G_PI_WR, 1);
u8g_MicroDelay(); /* 10ns, reference: t6963 datasheet */
}
static uint8_t u8g_com_arduino_t6963_read(u8g_t *u8g)
{
uint8_t val = 0;
u8g_com_arduino_digital_write(u8g, U8G_PI_RD, 0);
u8g_MicroDelay(); /* 150ns, reference: t6963 datasheet */
U8G_ATOMIC_START();
/* only read bits 0, 1 and 3 */
if ( (*u8g_input_data_port[3] & u8g_data_mask[3]) != 0 )
val++;
val <<= 1;
val <<= 1;
if ( (*u8g_input_data_port[1] & u8g_data_mask[1]) != 0 )
val++;
val <<= 1;
if ( (*u8g_input_data_port[0] & u8g_data_mask[0]) != 0 )
val++;
U8G_ATOMIC_END();
u8g_com_arduino_digital_write(u8g, U8G_PI_RD, 1);
u8g_MicroDelay(); /* 10ns, reference: t6963 datasheet */
return val;
}
void u8g_com_arduino_fast_parallel_write(u8g_t *u8g, uint8_t val)
{
U8G_ATOMIC_START();
u8g_com_arduino_fast_write_data_pin( 0, val&1 );
val >>= 1;
u8g_com_arduino_fast_write_data_pin( 1, val&1 );
val >>= 1;
u8g_com_arduino_fast_write_data_pin( 2, val&1 );
val >>= 1;
u8g_com_arduino_fast_write_data_pin( 3, val&1 );
val >>= 1;
u8g_com_arduino_fast_write_data_pin( 4, val&1 );
val >>= 1;
u8g_com_arduino_fast_write_data_pin( 5, val&1 );
val >>= 1;
u8g_com_arduino_fast_write_data_pin( 6, val&1 );
val >>= 1;
u8g_com_arduino_fast_write_data_pin( 7, val&1 );
val >>= 1;
U8G_ATOMIC_END();
/* EN cycle time must be 1 micro second */
u8g_com_arduino_digital_write(u8g, U8G_PI_EN, HIGH);
u8g_MicroDelay(); /* delay by 1000ns, reference: ST7920: 140ns, SBN1661: 100ns */
u8g_com_arduino_digital_write(u8g, U8G_PI_EN, LOW);
u8g_10MicroDelay(); /* ST7920 commands: 72us */
u8g_10MicroDelay(); /* ST7920 commands: 72us */
}
static void u8g_com_arduino_port_d_8bit_wr(u8g_t *u8g, uint8_t val)
{
PORTD = val;
/* WR cycle time must be 1 micro second, digitalWrite is slow enough to do this */
u8g_com_arduino_digital_write(u8g, U8G_PI_EN, LOW);
u8g_com_arduino_digital_write(u8g, U8G_PI_EN, HIGH);
}
static uint8_t u8g_com_arduino_t6963_write_auto_data(u8g_t *u8g, uint8_t val)
{
u8g_com_arduino_digital_write(u8g, U8G_PI_A0, 1);
if ( u8g_com_arduino_t6963_until_3_ok(u8g) == 0 )
return 0;
u8g_com_arduino_digital_write(u8g, U8G_PI_A0, 0);
u8g_com_arduino_t6963_write(u8g, val);
return 1;
}
void u8g_com_arduino_fast_parallel_write(u8g_t *u8g, uint8_t val)
{
u8g_com_arduino_fast_write_data_pin( 0, val&1 );
val >>= 1;
u8g_com_arduino_fast_write_data_pin( 1, val&1 );
val >>= 1;
u8g_com_arduino_fast_write_data_pin( 2, val&1 );
val >>= 1;
u8g_com_arduino_fast_write_data_pin( 3, val&1 );
val >>= 1;
u8g_com_arduino_fast_write_data_pin( 4, val&1 );
val >>= 1;
u8g_com_arduino_fast_write_data_pin( 5, val&1 );
val >>= 1;
u8g_com_arduino_fast_write_data_pin( 6, val&1 );
val >>= 1;
u8g_com_arduino_fast_write_data_pin( 7, val&1 );
val >>= 1;
/* EN cycle time must be 1 micro second, digitalWrite is slow enough to do this */
u8g_com_arduino_digital_write(u8g, U8G_PI_EN, HIGH);
u8g_com_arduino_digital_write(u8g, U8G_PI_EN, LOW);
}
uint8_t u8g_com_arduino_st7920_custom_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
{
switch(msg)
{
case U8G_COM_MSG_INIT:
u8g_com_arduino_assign_pin_output_high(u8g);
u8g_com_arduino_digital_write(u8g, U8G_PI_CS, LOW);
// u8g_com_arduino_digital_write(u8g, U8G_PI_SCK, LOW);
u8g_com_arduino_digital_write(u8g, U8G_PI_SCK, HIGH);
u8g_com_arduino_digital_write(u8g, U8G_PI_MOSI, LOW);
u8g_com_arduino_init_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK]);
u8g->pin_list[U8G_PI_A0_STATE] = 0; /* inital RS state: command mode */
break;
case U8G_COM_MSG_STOP:
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_CHIP_SELECT:
if ( arg_val == 0 )
{
/* disable, note: the st7920 has an active high chip select */
u8g_com_arduino_digital_write(u8g, U8G_PI_CS, LOW);
}
else
{
/* enable */
//u8g_com_arduino_digital_write(u8g, U8G_PI_SCK, HIGH);
u8g_com_arduino_digital_write(u8g, U8G_PI_CS, HIGH);
}
break;
case U8G_COM_MSG_WRITE_BYTE:
u8g_com_arduino_st7920_write_byte( u8g->pin_list[U8G_PI_A0_STATE], arg_val);
//u8g->pin_list[U8G_PI_A0_STATE] = 2;
//u8g_arduino_sw_spi_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], arg_val);
break;
case U8G_COM_MSG_WRITE_SEQ:
u8g_com_arduino_st7920_write_byte_seq(u8g->pin_list[U8G_PI_A0_STATE], (uint8_t *)arg_ptr, arg_val);
break;
case U8G_COM_MSG_WRITE_SEQ_P:
{
register uint8_t *ptr = arg_ptr;
while( arg_val > 0 )
{
u8g_com_arduino_st7920_write_byte(u8g->pin_list[U8G_PI_A0_STATE], u8g_pgm_read(ptr) );
//u8g->pin_list[U8G_PI_A0_STATE] = 2;
ptr++;
arg_val--;
}
}
break;
case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
u8g->pin_list[U8G_PI_A0_STATE] = arg_val;
break;
}
return 1;
}
uint8_t u8g_com_arduino_std_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
{
switch(msg)
{
case U8G_COM_MSG_INIT:
u8g_com_arduino_assign_pin_output_high(u8g);
u8g_com_arduino_digital_write(u8g, U8G_PI_SCK, LOW);
u8g_com_arduino_digital_write(u8g, U8G_PI_MOSI, LOW);
break;
case U8G_COM_MSG_STOP:
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_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_WRITE_BYTE:
u8g_arduino_sw_spi_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], arg_val);
break;
case U8G_COM_MSG_WRITE_SEQ:
{
register uint8_t *ptr = arg_ptr;
while( arg_val > 0 )
{
u8g_arduino_sw_spi_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], *ptr++);
arg_val--;
}
}
break;
case U8G_COM_MSG_WRITE_SEQ_P:
{
register uint8_t *ptr = arg_ptr;
while( arg_val > 0 )
{
u8g_arduino_sw_spi_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], u8g_pgm_read(ptr));
ptr++;
arg_val--;
}
}
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;
}
return 1;
}
uint8_t u8g_com_arduino_parallel_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
{
switch(msg)
{
case U8G_COM_MSG_INIT:
/* setup the RW pin as output and force it to low */
if ( u8g->pin_list[U8G_PI_RW] != U8G_PIN_NONE )
{
pinMode(u8g->pin_list[U8G_PI_RW], OUTPUT);
u8g_com_arduino_digital_write(u8g, U8G_PI_RW, LOW);
}
/* set all pins (except RW pin) */
u8g_com_arduino_assign_pin_output_high(u8g);
break;
case U8G_COM_MSG_STOP:
break;
case U8G_COM_MSG_CHIP_SELECT:
if ( arg_val == 0 )
{
/* disable */
u8g_com_arduino_digital_write(u8g, U8G_PI_CS1, HIGH);
u8g_com_arduino_digital_write(u8g, U8G_PI_CS2, HIGH);
}
else if ( arg_val == 1 )
{
/* enable */
u8g_com_arduino_digital_write(u8g, U8G_PI_CS1, LOW);
u8g_com_arduino_digital_write(u8g, U8G_PI_CS2, HIGH);
}
else if ( arg_val == 2 )
{
/* enable */
u8g_com_arduino_digital_write(u8g, U8G_PI_CS1, HIGH);
u8g_com_arduino_digital_write(u8g, U8G_PI_CS2, LOW);
}
else
{
/* enable */
u8g_com_arduino_digital_write(u8g, U8G_PI_CS1, LOW);
u8g_com_arduino_digital_write(u8g, U8G_PI_CS2, LOW);
}
break;
case U8G_COM_MSG_WRITE_BYTE:
u8g_com_arduino_parallel_write(u8g, arg_val);
break;
case U8G_COM_MSG_WRITE_SEQ:
{
register uint8_t *ptr = arg_ptr;
while( arg_val > 0 )
{
u8g_com_arduino_parallel_write(u8g, *ptr++);
arg_val--;
}
}
break;
case U8G_COM_MSG_WRITE_SEQ_P:
{
register uint8_t *ptr = arg_ptr;
while( arg_val > 0 )
{
u8g_com_arduino_parallel_write(u8g, u8g_pgm_read(ptr));
ptr++;
arg_val--;
}
}
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_DI, arg_val);
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;
}
return 1;
}
uint8_t u8g_com_arduino_t6963_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
{
switch(msg)
{
case U8G_COM_MSG_INIT:
u8g->pin_list[U8G_PI_A0_STATE] = 0;
u8g_com_arduino_t6963_init(u8g);
/* setup the RW (equal to WR) pin as output and force it to high */
if ( u8g->pin_list[U8G_PI_WR] != U8G_PIN_NONE )
{
pinMode(u8g->pin_list[U8G_PI_WR], OUTPUT);
u8g_com_arduino_digital_write(u8g, U8G_PI_WR, HIGH);
}
/* set all pins (except WR pin) */
u8g_com_arduino_assign_pin_output_high(u8g);
break;
case U8G_COM_MSG_STOP:
break;
case U8G_COM_MSG_CHIP_SELECT:
if ( arg_val == 0 )
{
/* disable, active low chip select */
u8g_com_arduino_digital_write(u8g, U8G_PI_CS, HIGH);
}
else
{
/* enable */
u8g_com_arduino_digital_write(u8g, U8G_PI_CS, LOW);
}
break;
case U8G_COM_MSG_WRITE_BYTE:
if ( u8g->pin_list[U8G_PI_A0_STATE] == 0 )
{
u8g_com_arduino_t6963_write_data(u8g, arg_val);
}
else
{
u8g_com_arduino_t6963_write_cmd(u8g, arg_val);
}
break;
case U8G_COM_MSG_WRITE_SEQ:
{
register uint8_t *ptr = arg_ptr;
u8g_com_arduino_t6963_write_cmd(u8g, 0x0b0); /* auto write */
while( arg_val > 0 )
{
if ( u8g_com_arduino_t6963_write_auto_data(u8g, *ptr++) == 0 )
break;
arg_val--;
}
u8g_com_arduino_t6963_write_cmd(u8g, 0x0b2); /* auto reset */
}
break;
case U8G_COM_MSG_WRITE_SEQ_P:
{
register uint8_t *ptr = arg_ptr;
u8g_com_arduino_t6963_write_cmd(u8g, 0x0b0); /* auto write */
while( arg_val > 0 )
{
if ( u8g_com_arduino_t6963_write_auto_data(u8g, u8g_pgm_read(ptr)) == 0 )
break;
ptr++;
arg_val--;
}
u8g_com_arduino_t6963_write_cmd(u8g, 0x0b2); /* auto reset */
}
break;
case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 1) or data mode (arg_val = 0) */
u8g->pin_list[U8G_PI_A0_STATE] = arg_val;
//u8g_com_arduino_digital_write(u8g, U8G_PI_DI, arg_val);
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;
}
return 1;
}
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);
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;
}
uint8_t u8g_com_arduino_st7920_hw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
{
switch(msg)
{
case U8G_COM_MSG_INIT:
u8g_com_arduino_assign_pin_output_high(u8g);
u8g_com_arduino_digital_write(u8g, U8G_PI_CS, LOW);
DDRB |= _BV(3); /* D0, MOSI */
DDRB |= _BV(5); /* SCK */
DDRB |= _BV(2); /* slave select */
PORTB &= ~_BV(3); /* D0, MOSI = 0 */
PORTB &= ~_BV(5); /* SCK = 0 */
/*
SPR1 SPR0
0 0 fclk/4
0 1 fclk/16
1 0 fclk/64
1 1 fclk/128
*/
SPCR = 0;
/* 20 Dez 2012: set CPOL and CPHA to 1 !!! */
SPCR = (1<<SPE) | (1<<MSTR)|(0<<SPR1)|(0<<SPR0)|(1<<CPOL)|(1<<CPHA);
#ifdef U8G_HW_SPI_2X
SPSR = (1 << SPI2X); /* double speed, issue 89 */
#endif
u8g->pin_list[U8G_PI_A0_STATE] = 0; /* inital RS state: command mode */
break;
case U8G_COM_MSG_STOP:
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_CHIP_SELECT:
if ( arg_val == 0 )
{
/* disable, note: the st7920 has an active high chip select */
u8g_com_arduino_digital_write(u8g, U8G_PI_CS, LOW);
}
else
{
/* enable */
//u8g_com_arduino_digital_write(u8g, U8G_PI_SCK, LOW);
u8g_com_arduino_digital_write(u8g, U8G_PI_CS, HIGH);
}
break;
case U8G_COM_MSG_WRITE_BYTE:
u8g_com_arduino_st7920_write_byte_hw_spi(u8g, u8g->pin_list[U8G_PI_A0_STATE], arg_val);
// u8g->pin_list[U8G_PI_A0_STATE] = 2;
//u8g_arduino_sw_spi_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], arg_val);
break;
case U8G_COM_MSG_WRITE_SEQ:
{
register uint8_t *ptr = arg_ptr;
while( arg_val > 0 )
{
u8g_com_arduino_st7920_write_byte_hw_spi(u8g, u8g->pin_list[U8G_PI_A0_STATE], *ptr++);
// u8g->pin_list[U8G_PI_A0_STATE] = 2;
arg_val--;
}
}
break;
case U8G_COM_MSG_WRITE_SEQ_P:
{
register uint8_t *ptr = arg_ptr;
while( arg_val > 0 )
{
u8g_com_arduino_st7920_write_byte_hw_spi(u8g, u8g->pin_list[U8G_PI_A0_STATE], u8g_pgm_read(ptr) );
// u8g->pin_list[U8G_PI_A0_STATE] = 2;
ptr++;
arg_val--;
}
}
break;
case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
u8g->pin_list[U8G_PI_A0_STATE] = arg_val;
break;
}
return 1;
}
