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207 lines
6.9 KiB
207 lines
6.9 KiB
/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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/**
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* Based on u8g_com_std_sw_spi.c
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*
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* Universal 8bit Graphics Library
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*
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* Copyright (c) 2015, olikraus@gmail.com
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* All rights reserved.
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*
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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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*
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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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*
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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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*
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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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#ifdef TARGET_LPC1768
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#include "../../../inc/MarlinConfigPre.h"
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#if HAS_MARLINUI_U8GLIB && DISABLED(U8GLIB_ST7920)
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#include <SoftwareSPI.h>
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#undef SPI_SPEED
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#define SPI_SPEED 2 // About 2 MHz
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#include <Arduino.h>
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#include <algorithm>
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#include <LPC17xx.h>
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#include <gpio.h>
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#include <U8glib.h>
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uint8_t swSpiTransfer_mode_0(uint8_t b, const uint8_t spi_speed, const pin_t sck_pin, const pin_t miso_pin, const pin_t mosi_pin ) {
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LOOP_L_N(i, 8) {
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if (spi_speed == 0) {
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LPC176x::gpio_set(mosi_pin, !!(b & 0x80));
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LPC176x::gpio_set(sck_pin, HIGH);
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b <<= 1;
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if (miso_pin >= 0 && LPC176x::gpio_get(miso_pin)) b |= 1;
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LPC176x::gpio_set(sck_pin, LOW);
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}
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else {
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const uint8_t state = (b & 0x80) ? HIGH : LOW;
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LOOP_L_N(j, spi_speed)
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LPC176x::gpio_set(mosi_pin, state);
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LOOP_L_N(j, spi_speed + (miso_pin >= 0 ? 0 : 1))
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LPC176x::gpio_set(sck_pin, HIGH);
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b <<= 1;
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if (miso_pin >= 0 && LPC176x::gpio_get(miso_pin)) b |= 1;
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LOOP_L_N(j, spi_speed)
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LPC176x::gpio_set(sck_pin, LOW);
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}
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}
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return b;
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}
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uint8_t swSpiTransfer_mode_3(uint8_t b, const uint8_t spi_speed, const pin_t sck_pin, const pin_t miso_pin, const pin_t mosi_pin ) {
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LOOP_L_N(i, 8) {
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const uint8_t state = (b & 0x80) ? HIGH : LOW;
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if (spi_speed == 0) {
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LPC176x::gpio_set(sck_pin, LOW);
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LPC176x::gpio_set(mosi_pin, state);
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LPC176x::gpio_set(mosi_pin, state); // need some setup time
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LPC176x::gpio_set(sck_pin, HIGH);
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}
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else {
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LOOP_L_N(j, spi_speed + (miso_pin >= 0 ? 0 : 1))
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LPC176x::gpio_set(sck_pin, LOW);
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LOOP_L_N(j, spi_speed)
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LPC176x::gpio_set(mosi_pin, state);
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LOOP_L_N(j, spi_speed)
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LPC176x::gpio_set(sck_pin, HIGH);
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}
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b <<= 1;
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if (miso_pin >= 0 && LPC176x::gpio_get(miso_pin)) b |= 1;
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}
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return b;
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}
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static uint8_t SPI_speed = 0;
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static void u8g_sw_spi_HAL_LPC1768_shift_out(uint8_t dataPin, uint8_t clockPin, uint8_t val) {
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#if EITHER(FYSETC_MINI_12864, MKS_MINI_12864)
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swSpiTransfer_mode_3(val, SPI_speed, clockPin, -1, dataPin);
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#else
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swSpiTransfer_mode_0(val, SPI_speed, clockPin, -1, dataPin);
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#endif
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}
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uint8_t u8g_com_HAL_LPC1768_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) {
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switch (msg) {
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case U8G_COM_MSG_INIT:
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u8g_SetPIOutput(u8g, U8G_PI_SCK);
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u8g_SetPIOutput(u8g, U8G_PI_MOSI);
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u8g_SetPIOutput(u8g, U8G_PI_CS);
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u8g_SetPIOutput(u8g, U8G_PI_A0);
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if (U8G_PIN_NONE != u8g->pin_list[U8G_PI_RESET]) u8g_SetPIOutput(u8g, U8G_PI_RESET);
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SPI_speed = swSpiInit(SPI_SPEED, u8g->pin_list[U8G_PI_SCK], u8g->pin_list[U8G_PI_MOSI]);
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u8g_SetPILevel(u8g, U8G_PI_SCK, 0);
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u8g_SetPILevel(u8g, U8G_PI_MOSI, 0);
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break;
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case U8G_COM_MSG_STOP:
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break;
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case U8G_COM_MSG_RESET:
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if (U8G_PIN_NONE != u8g->pin_list[U8G_PI_RESET]) u8g_SetPILevel(u8g, U8G_PI_RESET, arg_val);
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break;
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case U8G_COM_MSG_CHIP_SELECT:
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#if EITHER(FYSETC_MINI_12864, MKS_MINI_12864) // LCD SPI is running mode 3 while SD card is running mode 0
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if (arg_val) { // SCK idle state needs to be set to the proper idle state before
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// the next chip select goes active
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u8g_SetPILevel(u8g, U8G_PI_SCK, 1); // Set SCK to mode 3 idle state before CS goes active
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u8g_SetPILevel(u8g, U8G_PI_CS, LOW);
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}
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else {
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u8g_SetPILevel(u8g, U8G_PI_CS, HIGH);
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u8g_SetPILevel(u8g, U8G_PI_SCK, 0); // Set SCK to mode 0 idle state after CS goes inactive
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}
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#else
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u8g_SetPILevel(u8g, U8G_PI_CS, !arg_val);
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#endif
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break;
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case U8G_COM_MSG_WRITE_BYTE:
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u8g_sw_spi_HAL_LPC1768_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], arg_val);
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break;
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case U8G_COM_MSG_WRITE_SEQ: {
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uint8_t *ptr = (uint8_t *)arg_ptr;
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while (arg_val > 0) {
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u8g_sw_spi_HAL_LPC1768_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], *ptr++);
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arg_val--;
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}
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}
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break;
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case U8G_COM_MSG_WRITE_SEQ_P: {
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uint8_t *ptr = (uint8_t *)arg_ptr;
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while (arg_val > 0) {
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u8g_sw_spi_HAL_LPC1768_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], u8g_pgm_read(ptr));
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ptr++;
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arg_val--;
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}
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}
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break;
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case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
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u8g_SetPILevel(u8g, U8G_PI_A0, arg_val);
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break;
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}
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return 1;
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}
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#endif // HAS_MARLINUI_U8GLIB && !U8GLIB_ST7920
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#endif // TARGET_LPC1768
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