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u8g2-copy/csrc/u8x8_byte.c

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u8g2 moved from u8glib
2015-11-07 04:07:14 +08:00
/*
u8x8_byte.c
fixed license description (url)
2016-01-04 00:10:50 +08:00
Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/)
update
2016-01-01 16:27:17 +08:00
Copyright (c) 2016, 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.
u8g2 moved from u8glib
2015-11-07 04:07:14 +08:00
*/
#include "u8x8.h"
uint8_t u8x8_byte_SetDC(u8x8_t *u8x8, uint8_t dc)
{
return u8x8->byte_cb(u8x8, U8X8_MSG_BYTE_SET_DC, dc, NULL);
}
uint8_t u8x8_byte_SendBytes(u8x8_t *u8x8, uint8_t cnt, uint8_t *data)
{
return u8x8->byte_cb(u8x8, U8X8_MSG_BYTE_SEND, cnt, (void *)data);
}
uint8_t u8x8_byte_SendByte(u8x8_t *u8x8, uint8_t byte)
{
return u8x8_byte_SendBytes(u8x8, 1, &byte);
}
update
2016-02-29 05:24:05 +08:00
uint8_t u8x8_byte_StartTransfer(u8x8_t *u8x8)
{
return u8x8->byte_cb(u8x8, U8X8_MSG_BYTE_START_TRANSFER, 0, NULL);
}
uint8_t u8x8_byte_EndTransfer(u8x8_t *u8x8)
{
return u8x8->byte_cb(u8x8, U8X8_MSG_BYTE_END_TRANSFER, 0, NULL);
}
u8g2 moved from u8glib
2015-11-07 04:07:14 +08:00
null device, issue #504
2018-02-17 23:27:06 +08:00
/*=========================================*/
uint8_t u8x8_byte_empty(U8X8_UNUSED u8x8_t *u8x8, uint8_t msg, U8X8_UNUSED uint8_t arg_int, U8X8_UNUSED void *arg_ptr)
{
switch(msg)
{
case U8X8_MSG_BYTE_SEND:
case U8X8_MSG_BYTE_INIT:
case U8X8_MSG_BYTE_SET_DC:
case U8X8_MSG_BYTE_START_TRANSFER:
case U8X8_MSG_BYTE_END_TRANSFER:
break; /* do nothing */
}
return 1; /* always succeed */
}
/*=========================================*/
u8g2 moved from u8glib
2015-11-07 04:07:14 +08:00
/*
Uses:
u8x8->display_info->sda_setup_time_ns
u8x8->display_info->sck_pulse_width_ns
Renames sck_clock_mode -> spi_mode. Implemented SPI modes for HW SPI.
2016-07-27 02:38:55 +08:00
u8x8->display_info->spi_mode
u8g2 moved from u8glib
2015-11-07 04:07:14 +08:00
u8x8->display_info->chip_disable_level
u8x8->display_info->chip_enable_level
u8x8->display_info->post_chip_enable_wait_ns
u8x8->display_info->pre_chip_disable_wait_ns
Calls to GPIO and DELAY:
U8X8_MSG_DELAY_NANO
U8X8_MSG_GPIO_DC
U8X8_MSG_GPIO_CS
U8X8_MSG_GPIO_CLOCK
U8X8_MSG_GPIO_DATA
Handles:
U8X8_MSG_BYTE_INIT
U8X8_MSG_BYTE_SEND
U8X8_MSG_BYTE_SET_DC
U8X8_MSG_BYTE_START_TRANSFER
U8X8_MSG_BYTE_END_TRANSFER
*/
6800 & 8080 transfer
2015-12-07 00:45:57 +08:00
uint8_t u8x8_byte_4wire_sw_spi(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
u8g2 moved from u8glib
2015-11-07 04:07:14 +08:00
{
uint8_t i, b;
uint8_t *data;
Renames sck_clock_mode -> spi_mode. Implemented SPI modes for HW SPI.
2016-07-27 02:38:55 +08:00
uint8_t takeover_edge = u8x8_GetSPIClockPhase(u8x8);
u8g2 moved from u8glib
2015-11-07 04:07:14 +08:00
uint8_t not_takeover_edge = 1 - takeover_edge;
switch(msg)
{
case U8X8_MSG_BYTE_SEND:
data = (uint8_t *)arg_ptr;
while( arg_int > 0 )
{
b = *data;
data++;
arg_int--;
for( i = 0; i < 8; i++ )
{
if ( b & 128 )
pins for i2c, added missing wiki .pre file
2015-12-06 17:53:59 +08:00
u8x8_gpio_SetSPIData(u8x8, 1);
u8g2 moved from u8glib
2015-11-07 04:07:14 +08:00
else
pins for i2c, added missing wiki .pre file
2015-12-06 17:53:59 +08:00
u8x8_gpio_SetSPIData(u8x8, 0);
u8g2 moved from u8glib
2015-11-07 04:07:14 +08:00
b <<= 1;
pins for i2c, added missing wiki .pre file
2015-12-06 17:53:59 +08:00
u8x8_gpio_SetSPIClock(u8x8, not_takeover_edge);
u8g2 moved from u8glib
2015-11-07 04:07:14 +08:00
u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->sda_setup_time_ns);
pins for i2c, added missing wiki .pre file
2015-12-06 17:53:59 +08:00
u8x8_gpio_SetSPIClock(u8x8, takeover_edge);
u8g2 moved from u8glib
2015-11-07 04:07:14 +08:00
u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->sck_pulse_width_ns);
}
}
break;
case U8X8_MSG_BYTE_INIT:
/* disable chipselect */
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
/* no wait required here */
/* for SPI: setup correct level of the clock signal */
Renames sck_clock_mode -> spi_mode. Implemented SPI modes for HW SPI.
2016-07-27 02:38:55 +08:00
u8x8_gpio_SetSPIClock(u8x8, u8x8_GetSPIClockPhase(u8x8));
u8g2 moved from u8glib
2015-11-07 04:07:14 +08:00
break;
case U8X8_MSG_BYTE_SET_DC:
u8x8_gpio_SetDC(u8x8, arg_int);
break;
case U8X8_MSG_BYTE_START_TRANSFER:
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_enable_level);
u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->post_chip_enable_wait_ns, NULL);
break;
case U8X8_MSG_BYTE_END_TRANSFER:
u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->pre_chip_disable_wait_ns, NULL);
6800 & 8080 transfer
2015-12-07 00:45:57 +08:00
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
break;
default:
return 0;
}
return 1;
}
/*=========================================*/
uint8_t u8x8_byte_8bit_6800mode(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
uint8_t i, b;
uint8_t *data;
switch(msg)
{
case U8X8_MSG_BYTE_SEND:
data = (uint8_t *)arg_ptr;
while( arg_int > 0 )
{
b = *data;
data++;
arg_int--;
for( i = U8X8_MSG_GPIO_D0; i <= U8X8_MSG_GPIO_D7; i++ )
{
u8x8_gpio_call(u8x8, i, b&1);
b >>= 1;
}
u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->data_setup_time_ns);
u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 1);
u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->write_pulse_width_ns);
u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 0);
}
break;
case U8X8_MSG_BYTE_INIT:
/* disable chipselect */
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
/* ensure that the enable signal is high */
u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 0);
break;
case U8X8_MSG_BYTE_SET_DC:
u8x8_gpio_SetDC(u8x8, arg_int);
break;
case U8X8_MSG_BYTE_START_TRANSFER:
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_enable_level);
u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->post_chip_enable_wait_ns, NULL);
break;
case U8X8_MSG_BYTE_END_TRANSFER:
u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->pre_chip_disable_wait_ns, NULL);
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
break;
default:
return 0;
}
return 1;
}
uint8_t u8x8_byte_8bit_8080mode(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
uint8_t i, b;
uint8_t *data;
switch(msg)
{
case U8X8_MSG_BYTE_SEND:
data = (uint8_t *)arg_ptr;
while( arg_int > 0 )
{
b = *data;
data++;
arg_int--;
for( i = U8X8_MSG_GPIO_D0; i <= U8X8_MSG_GPIO_D7; i++ )
{
u8x8_gpio_call(u8x8, i, b&1);
b >>= 1;
}
u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->data_setup_time_ns);
u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 0);
u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->write_pulse_width_ns);
u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 1);
}
break;
case U8X8_MSG_BYTE_INIT:
/* disable chipselect */
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
/* ensure that the enable signal is high */
u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 1);
break;
case U8X8_MSG_BYTE_SET_DC:
u8x8_gpio_SetDC(u8x8, arg_int);
break;
case U8X8_MSG_BYTE_START_TRANSFER:
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_enable_level);
u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->post_chip_enable_wait_ns, NULL);
break;
case U8X8_MSG_BYTE_END_TRANSFER:
u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->pre_chip_disable_wait_ns, NULL);
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
break;
default:
return 0;
}
return 1;
}
/*=========================================*/
uint8_t u8x8_byte_3wire_sw_spi(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
uint8_t i;
uint8_t *data;
Renames sck_clock_mode -> spi_mode. Implemented SPI modes for HW SPI.
2016-07-27 02:38:55 +08:00
uint8_t takeover_edge = u8x8_GetSPIClockPhase(u8x8);
6800 & 8080 transfer
2015-12-07 00:45:57 +08:00
uint8_t not_takeover_edge = 1 - takeover_edge;
uint16_t b;
static uint8_t last_dc;
switch(msg)
{
case U8X8_MSG_BYTE_SEND:
data = (uint8_t *)arg_ptr;
while( arg_int > 0 )
{
b = *data;
if ( last_dc != 0 )
b |= 256;
data++;
arg_int--;
for( i = 0; i < 9; i++ )
{
if ( b & 256 )
u8x8_gpio_SetSPIData(u8x8, 1);
else
u8x8_gpio_SetSPIData(u8x8, 0);
b <<= 1;
u8x8_gpio_SetSPIClock(u8x8, not_takeover_edge);
u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->sda_setup_time_ns);
u8x8_gpio_SetSPIClock(u8x8, takeover_edge);
u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->sck_pulse_width_ns);
}
}
break;
case U8X8_MSG_BYTE_INIT:
/* disable chipselect */
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
/* no wait required here */
/* for SPI: setup correct level of the clock signal */
Renames sck_clock_mode -> spi_mode. Implemented SPI modes for HW SPI.
2016-07-27 02:38:55 +08:00
u8x8_gpio_SetSPIClock(u8x8, u8x8_GetSPIClockPhase(u8x8));
6800 & 8080 transfer
2015-12-07 00:45:57 +08:00
break;
case U8X8_MSG_BYTE_SET_DC:
last_dc = arg_int;
break;
case U8X8_MSG_BYTE_START_TRANSFER:
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_enable_level);
u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->post_chip_enable_wait_ns, NULL);
break;
case U8X8_MSG_BYTE_END_TRANSFER:
u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->pre_chip_disable_wait_ns, NULL);
u8g2 moved from u8glib
2015-11-07 04:07:14 +08:00
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
break;
default:
return 0;
}
return 1;
}
st7920 SPI
2016-02-27 04:58:40 +08:00
/*=========================================*/
work on ks0108, #88
2016-12-05 05:48:27 +08:00
void u8x8_byte_set_ks0108_cs(u8x8_t *u8x8, uint8_t arg)
st7920 SPI
2016-02-27 04:58:40 +08:00
{
byte function for ks0108, #88
2016-12-04 16:08:37 +08:00
u8x8_gpio_SetCS(u8x8, arg&1);
arg = arg >> 1;
u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_CS1, arg&1);
issue #631
2018-06-07 05:00:08 +08:00
arg = arg >> 1;
fixed ks0108 cs problem, issue #168
2017-01-21 16:02:00 +08:00
u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_CS2, arg&1);
st7920 SPI
2016-02-27 04:58:40 +08:00
}
byte function for ks0108, #88
2016-12-04 16:08:37 +08:00
/* 6800 mode */
uint8_t u8x8_byte_ks0108(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
st7920 SPI
2016-02-27 04:58:40 +08:00
{
byte function for ks0108, #88
2016-12-04 16:08:37 +08:00
uint8_t i, b;
st7920 SPI
2016-02-27 04:58:40 +08:00
uint8_t *data;
switch(msg)
{
case U8X8_MSG_BYTE_SEND:
data = (uint8_t *)arg_ptr;
while( arg_int > 0 )
{
b = *data;
data++;
arg_int--;
byte function for ks0108, #88
2016-12-04 16:08:37 +08:00
for( i = U8X8_MSG_GPIO_D0; i <= U8X8_MSG_GPIO_D7; i++ )
{
u8x8_gpio_call(u8x8, i, b&1);
b >>= 1;
}
u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->data_setup_time_ns);
u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 1);
u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->write_pulse_width_ns);
u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 0);
st7920 SPI
2016-02-27 04:58:40 +08:00
}
break;
case U8X8_MSG_BYTE_INIT:
/* disable chipselect */
byte function for ks0108, #88
2016-12-04 16:08:37 +08:00
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
issue #104
2016-12-14 12:35:03 +08:00
/* ensure that the enable signal is low */
byte function for ks0108, #88
2016-12-04 16:08:37 +08:00
u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 0);
st7920 SPI
2016-02-27 04:58:40 +08:00
break;
case U8X8_MSG_BYTE_SET_DC:
byte function for ks0108, #88
2016-12-04 16:08:37 +08:00
u8x8_gpio_SetDC(u8x8, arg_int);
st7920 SPI
2016-02-27 04:58:40 +08:00
break;
case U8X8_MSG_BYTE_START_TRANSFER:
byte function for ks0108, #88
2016-12-04 16:08:37 +08:00
/* expects 3 bits in arg_int for the chip select lines */
u8x8_byte_set_ks0108_cs(u8x8, arg_int);
st7920 SPI
2016-02-27 04:58:40 +08:00
u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->post_chip_enable_wait_ns, NULL);
break;
case U8X8_MSG_BYTE_END_TRANSFER:
u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->pre_chip_disable_wait_ns, NULL);
byte function for ks0108, #88
2016-12-04 16:08:37 +08:00
u8x8_byte_set_ks0108_cs(u8x8, arg_int);
st7920 SPI
2016-02-27 04:58:40 +08:00
break;
default:
return 0;
}
return 1;
}
byte function for ks0108, #88
2016-12-04 16:08:37 +08:00
st7920 SPI
2016-02-27 04:58:40 +08:00
new com proc for SED1520/SBN1661, issue #324
2017-08-10 03:09:21 +08:00
/* sed1520 or sbn1661
U8X8_MSG_GPIO_E --> E1
U8X8_MSG_GPIO_CS --> E2
*/
uint8_t u8x8_byte_sed1520(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
uint8_t i, b;
uint8_t *data;
static uint8_t enable_pin;
switch(msg)
{
case U8X8_MSG_BYTE_SEND:
data = (uint8_t *)arg_ptr;
while( arg_int > 0 )
{
b = *data;
data++;
arg_int--;
for( i = U8X8_MSG_GPIO_D0; i <= U8X8_MSG_GPIO_D7; i++ )
{
u8x8_gpio_call(u8x8, i, b&1);
b >>= 1;
}
u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->data_setup_time_ns);
u8x8_gpio_call(u8x8, enable_pin, 1);
issue #493, timing issues with ks0108
2018-02-14 01:53:56 +08:00
u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, 200); /* KS0108 requires 450 ns, use 200 here */
u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->write_pulse_width_ns); /* expect 250 here */
new com proc for SED1520/SBN1661, issue #324
2017-08-10 03:09:21 +08:00
u8x8_gpio_call(u8x8, enable_pin, 0);
}
break;
case U8X8_MSG_BYTE_INIT:
/* disable chipselect */
u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
/* ensure that the enable signals are low */
u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 0);
u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_CS, 0);
enable_pin = U8X8_MSG_GPIO_E;
break;
case U8X8_MSG_BYTE_SET_DC:
u8x8_gpio_SetDC(u8x8, arg_int);
break;
case U8X8_MSG_BYTE_START_TRANSFER:
/* cs lines are not supported for the SED1520/SBN1661 */
/* instead, this will select the E1 or E2 line */
issue #2191
2023-07-16 18:02:05 +08:00
/* arg_int is set by u8x8_d_sbn1661_122x32() function */
new com proc for SED1520/SBN1661, issue #324
2017-08-10 03:09:21 +08:00
enable_pin = U8X8_MSG_GPIO_E;
if ( arg_int != 0 )
enable_pin = U8X8_MSG_GPIO_CS;
break;
case U8X8_MSG_BYTE_END_TRANSFER:
break;
default:
return 0;
}
return 1;
}
software i2c
2015-12-06 05:43:30 +08:00
/*=========================================*/
/*
software i2c,
ignores ACK response (which is anyway not provided by some displays)
also does not allow reading from the device
*/
static void i2c_delay(u8x8_t *u8x8) U8X8_NOINLINE;
static void i2c_delay(u8x8_t *u8x8)
{
//u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_10MICRO, u8x8->display_info->i2c_bus_clock_100kHz);
u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_I2C, u8x8->display_info->i2c_bus_clock_100kHz);
}
static void i2c_init(u8x8_t *u8x8)
{
pins for i2c, added missing wiki .pre file
2015-12-06 17:53:59 +08:00
u8x8_gpio_SetI2CClock(u8x8, 1);
u8x8_gpio_SetI2CData(u8x8, 1);
software i2c
2015-12-06 05:43:30 +08:00
i2c_delay(u8x8);
}
/* actually, the scl line is not observed, so this procedure does not return a value */
static void i2c_read_scl_and_delay(u8x8_t *u8x8)
{
/* set as input (line will be high) */
pins for i2c, added missing wiki .pre file
2015-12-06 17:53:59 +08:00
u8x8_gpio_SetI2CClock(u8x8, 1);
software i2c
2015-12-06 05:43:30 +08:00
i2c_delay(u8x8);
}
static void i2c_clear_scl(u8x8_t *u8x8)
{
pins for i2c, added missing wiki .pre file
2015-12-06 17:53:59 +08:00
u8x8_gpio_SetI2CClock(u8x8, 0);
software i2c
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}
static void i2c_read_sda(u8x8_t *u8x8)
{
/* set as input (line will be high) */
pins for i2c, added missing wiki .pre file
2015-12-06 17:53:59 +08:00
u8x8_gpio_SetI2CData(u8x8, 1);
software i2c
2015-12-06 05:43:30 +08:00
}
static void i2c_clear_sda(u8x8_t *u8x8)
{
/* set open collector and drive low */
pins for i2c, added missing wiki .pre file
2015-12-06 17:53:59 +08:00
u8x8_gpio_SetI2CData(u8x8, 0);
software i2c
2015-12-06 05:43:30 +08:00
}
static void i2c_start(u8x8_t *u8x8)
{
if ( u8x8->i2c_started != 0 )
{
/* if already started: do restart */
i2c_read_sda(u8x8); /* SDA = 1 */
i2c_delay(u8x8);
i2c_read_scl_and_delay(u8x8);
}
i2c_read_sda(u8x8);
/* send the start condition, both lines go from 1 to 0 */
i2c_clear_sda(u8x8);
i2c_delay(u8x8);
i2c_clear_scl(u8x8);
u8x8->i2c_started = 1;
}
static void i2c_stop(u8x8_t *u8x8)
{
/* set SDA to 0 */
i2c_clear_sda(u8x8);
i2c_delay(u8x8);
/* now release all lines */
i2c_read_scl_and_delay(u8x8);
/* set SDA to 1 */
i2c_read_sda(u8x8);
i2c_delay(u8x8);
u8x8->i2c_started = 0;
}
static void i2c_write_bit(u8x8_t *u8x8, uint8_t val)
{
if (val)
i2c_read_sda(u8x8);
else
i2c_clear_sda(u8x8);
i2c_delay(u8x8);
i2c_read_scl_and_delay(u8x8);
i2c_clear_scl(u8x8);
}
static void i2c_read_bit(u8x8_t *u8x8)
{
//uint8_t val;
/* do not drive SDA */
i2c_read_sda(u8x8);
i2c_delay(u8x8);
i2c_read_scl_and_delay(u8x8);
i2c_read_sda(u8x8);
i2c_delay(u8x8);
i2c_clear_scl(u8x8);
//return val;
}
static void i2c_write_byte(u8x8_t *u8x8, uint8_t b)
{
i2c_write_bit(u8x8, b & 128);
i2c_write_bit(u8x8, b & 64);
i2c_write_bit(u8x8, b & 32);
i2c_write_bit(u8x8, b & 16);
i2c_write_bit(u8x8, b & 8);
i2c_write_bit(u8x8, b & 4);
i2c_write_bit(u8x8, b & 2);
i2c_write_bit(u8x8, b & 1);
/* read ack from client */
/* 0: ack was given by client */
/* 1: nothing happend during ack cycle */
i2c_read_bit(u8x8);
}
ssd i2c rework
2016-02-29 05:32:14 +08:00
uint8_t u8x8_byte_sw_i2c(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
uint8_t *data;
test version, issue #633
2018-06-09 16:27:50 +08:00
ssd i2c rework
2016-02-29 05:32:14 +08:00
switch(msg)
{
case U8X8_MSG_BYTE_SEND:
data = (uint8_t *)arg_ptr;
test version, issue #633
2018-06-09 16:27:50 +08:00
ssd i2c rework
2016-02-29 05:32:14 +08:00
while( arg_int > 0 )
{
i2c_write_byte(u8x8, *data);
data++;
arg_int--;
}
break;
case U8X8_MSG_BYTE_INIT:
i2c_init(u8x8);
break;
case U8X8_MSG_BYTE_SET_DC:
break;
case U8X8_MSG_BYTE_START_TRANSFER:
i2c_start(u8x8);
i2c_write_byte(u8x8, u8x8_GetI2CAddress(u8x8));
sw i2c restructure
2016-03-01 01:04:34 +08:00
//i2c_write_byte(u8x8, 0x078);
ssd i2c rework
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break;
case U8X8_MSG_BYTE_END_TRANSFER:
i2c_stop(u8x8);
break;
default:
return 0;
}
return 1;
}
2.22.16
2018-04-29 05:35:12 +08:00
/*=========================================*/
/* alternative i2c byte procedure */
#ifdef ALTERNATIVE_I2C_BYTE_PROCEDURE
void i2c_transfer(u8x8_t *u8x8, uint8_t adr, uint8_t cnt, uint8_t *data)
{
uint8_t i;
i2c_start(u8x8);
i2c_write_byte(u8x8, adr);
for( i = 0; i < cnt; i++ )
i2c_write_byte(u8x8, data[i]);
i2c_stop(u8x8);
}
uint8_t u8x8_byte_sw_i2c(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
static uint8_t buffer[32]; /* u8g2/u8x8 will never send more than 32 bytes */
static uint8_t buf_idx;
uint8_t *data;
switch(msg)
{
case U8X8_MSG_BYTE_SEND:
data = (uint8_t *)arg_ptr;
while( arg_int > 0 )
{
buffer[buf_idx++] = *data;
data++;
arg_int--;
}
break;
case U8X8_MSG_BYTE_INIT:
i2c_init(u8x8); /* init i2c communication */
break;
case U8X8_MSG_BYTE_SET_DC:
/* ignored for i2c */
break;
case U8X8_MSG_BYTE_START_TRANSFER:
buf_idx = 0;
break;
case U8X8_MSG_BYTE_END_TRANSFER:
i2c_transfer(u8x8, u8x8_GetI2CAddress(u8x8), buf_idx, buffer);
break;
default:
return 0;
}
return 1;
}
#endif