389ff92cc1
* Makefile, Scripts: new linter * About: remove ID from IC * Firmware: remove double define for DIVC/DIVR * Scripts: check folder names too. Docker: replace syntax check with make lint. * Reformat Sources and Migrate to new file naming convention * Docker: symlink clang-format-12 to clang-format * Add coding style guide
624 lines
19 KiB
C
624 lines
19 KiB
C
/*
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u8x8_byte.c
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Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/)
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Copyright (c) 2016, olikraus@gmail.com
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this list
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of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice, this
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list of conditions and the following disclaimer in the documentation and/or other
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materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "u8x8.h"
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uint8_t u8x8_byte_SetDC(u8x8_t* u8x8, uint8_t dc) {
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return u8x8->byte_cb(u8x8, U8X8_MSG_BYTE_SET_DC, dc, NULL);
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}
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uint8_t u8x8_byte_SendBytes(u8x8_t* u8x8, uint8_t cnt, uint8_t* data) {
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return u8x8->byte_cb(u8x8, U8X8_MSG_BYTE_SEND, cnt, (void*)data);
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}
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uint8_t u8x8_byte_SendByte(u8x8_t* u8x8, uint8_t byte) {
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return u8x8_byte_SendBytes(u8x8, 1, &byte);
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}
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uint8_t u8x8_byte_StartTransfer(u8x8_t* u8x8) {
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return u8x8->byte_cb(u8x8, U8X8_MSG_BYTE_START_TRANSFER, 0, NULL);
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}
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uint8_t u8x8_byte_EndTransfer(u8x8_t* u8x8) {
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return u8x8->byte_cb(u8x8, U8X8_MSG_BYTE_END_TRANSFER, 0, NULL);
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}
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/*=========================================*/
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uint8_t u8x8_byte_empty(
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U8X8_UNUSED u8x8_t* u8x8,
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uint8_t msg,
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U8X8_UNUSED uint8_t arg_int,
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U8X8_UNUSED void* arg_ptr) {
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switch(msg) {
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case U8X8_MSG_BYTE_SEND:
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case U8X8_MSG_BYTE_INIT:
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case U8X8_MSG_BYTE_SET_DC:
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case U8X8_MSG_BYTE_START_TRANSFER:
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case U8X8_MSG_BYTE_END_TRANSFER:
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break; /* do nothing */
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}
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return 1; /* always succeed */
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}
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/*=========================================*/
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/*
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Uses:
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u8x8->display_info->sda_setup_time_ns
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u8x8->display_info->sck_pulse_width_ns
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u8x8->display_info->spi_mode
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u8x8->display_info->chip_disable_level
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u8x8->display_info->chip_enable_level
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u8x8->display_info->post_chip_enable_wait_ns
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u8x8->display_info->pre_chip_disable_wait_ns
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Calls to GPIO and DELAY:
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U8X8_MSG_DELAY_NANO
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U8X8_MSG_GPIO_DC
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U8X8_MSG_GPIO_CS
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U8X8_MSG_GPIO_CLOCK
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U8X8_MSG_GPIO_DATA
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Handles:
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U8X8_MSG_BYTE_INIT
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U8X8_MSG_BYTE_SEND
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U8X8_MSG_BYTE_SET_DC
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U8X8_MSG_BYTE_START_TRANSFER
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U8X8_MSG_BYTE_END_TRANSFER
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*/
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uint8_t u8x8_byte_4wire_sw_spi(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr) {
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uint8_t i, b;
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uint8_t* data;
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uint8_t takeover_edge = u8x8_GetSPIClockPhase(u8x8);
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uint8_t not_takeover_edge = 1 - takeover_edge;
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switch(msg) {
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case U8X8_MSG_BYTE_SEND:
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data = (uint8_t*)arg_ptr;
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while(arg_int > 0) {
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b = *data;
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data++;
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arg_int--;
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for(i = 0; i < 8; i++) {
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if(b & 128)
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u8x8_gpio_SetSPIData(u8x8, 1);
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else
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u8x8_gpio_SetSPIData(u8x8, 0);
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b <<= 1;
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u8x8_gpio_SetSPIClock(u8x8, not_takeover_edge);
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u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->sda_setup_time_ns);
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u8x8_gpio_SetSPIClock(u8x8, takeover_edge);
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u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->sck_pulse_width_ns);
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}
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}
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break;
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case U8X8_MSG_BYTE_INIT:
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/* disable chipselect */
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u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
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/* no wait required here */
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/* for SPI: setup correct level of the clock signal */
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u8x8_gpio_SetSPIClock(u8x8, u8x8_GetSPIClockPhase(u8x8));
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break;
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case U8X8_MSG_BYTE_SET_DC:
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u8x8_gpio_SetDC(u8x8, arg_int);
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break;
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case U8X8_MSG_BYTE_START_TRANSFER:
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u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_enable_level);
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u8x8->gpio_and_delay_cb(
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u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->post_chip_enable_wait_ns, NULL);
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break;
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case U8X8_MSG_BYTE_END_TRANSFER:
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u8x8->gpio_and_delay_cb(
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u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->pre_chip_disable_wait_ns, NULL);
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u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
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break;
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default:
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return 0;
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}
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return 1;
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}
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/*=========================================*/
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uint8_t u8x8_byte_8bit_6800mode(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr) {
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uint8_t i, b;
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uint8_t* data;
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switch(msg) {
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case U8X8_MSG_BYTE_SEND:
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data = (uint8_t*)arg_ptr;
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while(arg_int > 0) {
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b = *data;
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data++;
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arg_int--;
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for(i = U8X8_MSG_GPIO_D0; i <= U8X8_MSG_GPIO_D7; i++) {
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u8x8_gpio_call(u8x8, i, b & 1);
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b >>= 1;
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}
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u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->data_setup_time_ns);
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u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 1);
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u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->write_pulse_width_ns);
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u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 0);
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}
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break;
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case U8X8_MSG_BYTE_INIT:
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/* disable chipselect */
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u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
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/* ensure that the enable signal is high */
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u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 0);
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break;
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case U8X8_MSG_BYTE_SET_DC:
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u8x8_gpio_SetDC(u8x8, arg_int);
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break;
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case U8X8_MSG_BYTE_START_TRANSFER:
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u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_enable_level);
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u8x8->gpio_and_delay_cb(
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u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->post_chip_enable_wait_ns, NULL);
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break;
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case U8X8_MSG_BYTE_END_TRANSFER:
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u8x8->gpio_and_delay_cb(
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u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->pre_chip_disable_wait_ns, NULL);
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u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
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break;
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default:
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return 0;
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}
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return 1;
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}
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uint8_t u8x8_byte_8bit_8080mode(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr) {
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uint8_t i, b;
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uint8_t* data;
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switch(msg) {
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case U8X8_MSG_BYTE_SEND:
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data = (uint8_t*)arg_ptr;
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while(arg_int > 0) {
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b = *data;
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data++;
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arg_int--;
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for(i = U8X8_MSG_GPIO_D0; i <= U8X8_MSG_GPIO_D7; i++) {
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u8x8_gpio_call(u8x8, i, b & 1);
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b >>= 1;
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}
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u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->data_setup_time_ns);
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u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 0);
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u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->write_pulse_width_ns);
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u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 1);
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}
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break;
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case U8X8_MSG_BYTE_INIT:
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/* disable chipselect */
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u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
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/* ensure that the enable signal is high */
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u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 1);
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break;
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case U8X8_MSG_BYTE_SET_DC:
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u8x8_gpio_SetDC(u8x8, arg_int);
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break;
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case U8X8_MSG_BYTE_START_TRANSFER:
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u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_enable_level);
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u8x8->gpio_and_delay_cb(
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u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->post_chip_enable_wait_ns, NULL);
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break;
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case U8X8_MSG_BYTE_END_TRANSFER:
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u8x8->gpio_and_delay_cb(
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u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->pre_chip_disable_wait_ns, NULL);
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u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
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break;
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default:
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return 0;
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}
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return 1;
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}
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/*=========================================*/
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uint8_t u8x8_byte_3wire_sw_spi(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr) {
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uint8_t i;
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uint8_t* data;
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uint8_t takeover_edge = u8x8_GetSPIClockPhase(u8x8);
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uint8_t not_takeover_edge = 1 - takeover_edge;
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uint16_t b;
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static uint8_t last_dc;
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switch(msg) {
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case U8X8_MSG_BYTE_SEND:
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data = (uint8_t*)arg_ptr;
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while(arg_int > 0) {
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b = *data;
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if(last_dc != 0) b |= 256;
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data++;
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arg_int--;
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for(i = 0; i < 9; i++) {
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if(b & 256)
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u8x8_gpio_SetSPIData(u8x8, 1);
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else
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u8x8_gpio_SetSPIData(u8x8, 0);
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b <<= 1;
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u8x8_gpio_SetSPIClock(u8x8, not_takeover_edge);
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u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->sda_setup_time_ns);
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u8x8_gpio_SetSPIClock(u8x8, takeover_edge);
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u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->sck_pulse_width_ns);
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}
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}
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break;
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case U8X8_MSG_BYTE_INIT:
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/* disable chipselect */
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u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
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/* no wait required here */
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/* for SPI: setup correct level of the clock signal */
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u8x8_gpio_SetSPIClock(u8x8, u8x8_GetSPIClockPhase(u8x8));
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break;
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case U8X8_MSG_BYTE_SET_DC:
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last_dc = arg_int;
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break;
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case U8X8_MSG_BYTE_START_TRANSFER:
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u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_enable_level);
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u8x8->gpio_and_delay_cb(
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u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->post_chip_enable_wait_ns, NULL);
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break;
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case U8X8_MSG_BYTE_END_TRANSFER:
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u8x8->gpio_and_delay_cb(
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u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->pre_chip_disable_wait_ns, NULL);
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u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
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break;
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default:
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return 0;
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}
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return 1;
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}
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/*=========================================*/
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void u8x8_byte_set_ks0108_cs(u8x8_t* u8x8, uint8_t arg) {
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u8x8_gpio_SetCS(u8x8, arg & 1);
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arg = arg >> 1;
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u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_CS1, arg & 1);
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arg = arg >> 1;
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u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_CS2, arg & 1);
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}
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/* 6800 mode */
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uint8_t u8x8_byte_ks0108(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr) {
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uint8_t i, b;
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uint8_t* data;
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switch(msg) {
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case U8X8_MSG_BYTE_SEND:
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data = (uint8_t*)arg_ptr;
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while(arg_int > 0) {
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b = *data;
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data++;
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arg_int--;
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for(i = U8X8_MSG_GPIO_D0; i <= U8X8_MSG_GPIO_D7; i++) {
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u8x8_gpio_call(u8x8, i, b & 1);
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b >>= 1;
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}
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u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->data_setup_time_ns);
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u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 1);
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u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->write_pulse_width_ns);
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u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 0);
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}
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break;
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case U8X8_MSG_BYTE_INIT:
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/* disable chipselect */
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u8x8_gpio_SetCS(u8x8, u8x8->display_info->chip_disable_level);
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/* ensure that the enable signal is low */
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u8x8_gpio_call(u8x8, U8X8_MSG_GPIO_E, 0);
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break;
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case U8X8_MSG_BYTE_SET_DC:
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u8x8_gpio_SetDC(u8x8, arg_int);
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break;
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case U8X8_MSG_BYTE_START_TRANSFER:
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/* expects 3 bits in arg_int for the chip select lines */
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u8x8_byte_set_ks0108_cs(u8x8, arg_int);
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u8x8->gpio_and_delay_cb(
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u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->post_chip_enable_wait_ns, NULL);
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break;
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case U8X8_MSG_BYTE_END_TRANSFER:
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u8x8->gpio_and_delay_cb(
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u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->pre_chip_disable_wait_ns, NULL);
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u8x8_byte_set_ks0108_cs(u8x8, arg_int);
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break;
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default:
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return 0;
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}
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return 1;
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}
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/* sed1520 or sbn1661
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U8X8_MSG_GPIO_E --> E1
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U8X8_MSG_GPIO_CS --> E2
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*/
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uint8_t u8x8_byte_sed1520(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr) {
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uint8_t i, b;
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uint8_t* data;
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static uint8_t enable_pin;
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switch(msg) {
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case U8X8_MSG_BYTE_SEND:
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data = (uint8_t*)arg_ptr;
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while(arg_int > 0) {
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b = *data;
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data++;
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arg_int--;
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for(i = U8X8_MSG_GPIO_D0; i <= U8X8_MSG_GPIO_D7; i++) {
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u8x8_gpio_call(u8x8, i, b & 1);
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b >>= 1;
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}
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u8x8_gpio_Delay(u8x8, U8X8_MSG_DELAY_NANO, u8x8->display_info->data_setup_time_ns);
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u8x8_gpio_call(u8x8, enable_pin, 1);
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u8x8_gpio_Delay(
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u8x8, U8X8_MSG_DELAY_NANO, 200); /* KS0108 requires 450 ns, use 200 here */
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u8x8_gpio_Delay(
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u8x8,
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U8X8_MSG_DELAY_NANO,
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u8x8->display_info->write_pulse_width_ns); /* expect 250 here */
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u8x8_gpio_call(u8x8, enable_pin, 0);
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|
}
|
|
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 */
|
|
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,
|
|
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) {
|
|
u8x8_gpio_SetI2CClock(u8x8, 1);
|
|
u8x8_gpio_SetI2CData(u8x8, 1);
|
|
|
|
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) */
|
|
u8x8_gpio_SetI2CClock(u8x8, 1);
|
|
|
|
i2c_delay(u8x8);
|
|
}
|
|
|
|
static void i2c_clear_scl(u8x8_t* u8x8) {
|
|
u8x8_gpio_SetI2CClock(u8x8, 0);
|
|
}
|
|
|
|
static void i2c_read_sda(u8x8_t* u8x8) {
|
|
/* set as input (line will be high) */
|
|
u8x8_gpio_SetI2CData(u8x8, 1);
|
|
}
|
|
|
|
static void i2c_clear_sda(u8x8_t* u8x8) {
|
|
/* set open collector and drive low */
|
|
u8x8_gpio_SetI2CData(u8x8, 0);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
uint8_t u8x8_byte_sw_i2c(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr) {
|
|
uint8_t* data;
|
|
|
|
switch(msg) {
|
|
case U8X8_MSG_BYTE_SEND:
|
|
data = (uint8_t*)arg_ptr;
|
|
|
|
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));
|
|
//i2c_write_byte(u8x8, 0x078);
|
|
break;
|
|
case U8X8_MSG_BYTE_END_TRANSFER:
|
|
i2c_stop(u8x8);
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*=========================================*/
|
|
|
|
/* 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
|