added licensing
Clyne Sullivan
7 years ago
parent
5c5c93db40
commit
603d04992c
@ -1,11 +1,49 @@
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/**
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* @file flash.h
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* Provides functionality for using an external SPI flash
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*
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* Copyright (C) 2018 Clyne Sullivan
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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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#ifndef FLASH_H_
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#define FLASH_H_
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#include <stdint.h>
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/**
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* Initializes GPIO ports and variables for flash IO. Must be called before
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* any reads or writes.
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*/
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void flash_init(void);
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/**
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* Does a blocking read of the flash chip into a pre-allocated buffer.
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* @param buf the buffer to read in to
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* @param addr the address to read from in the flash chip
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* @param count the number of bytes to read from the chip
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*/
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void flash_read(char *buf, uint32_t addr, unsigned int count);
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/**
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* Does a blocking write to the flash chip using data from a pre-allocated
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* buffer.
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* @param buf the buffer to read data from
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* @param addr the address to write to in the flash chip
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* @param count the number of bytes to write to the chip
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*/
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void flash_write(const char *buf, uint32_t addr, unsigned int count);
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#endif // FLASH_H_
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@ -1,8 +1,51 @@
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/**
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* @file stdlib.h
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* Provides missing C standard library functions
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* The newlib versions of these calls are not being used due to dependence on
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* unsupported system calls.
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*
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* Copyright (C) 2018 Clyne Sullivan
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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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#ifndef STDLIB_H_
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#define STDLIB_H_
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/**
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* Parses a formatted string, storing the result in the given buffer.
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* @param buf the buffer to print the parsed string to
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* @param max the maximum number of bytes to write to the buffer
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* @param format the format string
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* @return a pointer to the buffer
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*/
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char *snprintf(char *buf, unsigned int max, const char *format, ...);
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/**
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* Attempts to convert the given string to a float.
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* @param s the string to convert
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* @param endptr if not-null, set to the address of the character after the
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* number
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* @return the resulting float, or zero if an error occurred
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*/
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float strtof(const char *s, char **endptr);
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/**
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* Attempts to convert the given string to an integer.
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* @param s the string to convert
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* @return the resulting integer, or zero if an error occurred
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*/
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int atoi(const char *s);
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#endif // STDLIB_H_
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@ -1 +0,0 @@
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print "Hello, world!"
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@ -0,0 +1,29 @@
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print("Hello.\n")
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fg = 32767
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# draw bg, lines
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rect(50, 50, 380, 220, 6375)
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line(50, 160, 430, 160, fg)
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line(240, 50, 240, 270, fg)
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x = 50
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while (x <= 430) {
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line(x, 170, x, 150, fg)
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x = x + 20
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}
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y = 50
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while (y <= 270) {
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line(230, y, 250, y, fg)
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y = y + 20
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}
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while (1) {
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x = rand(379) + 50
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y = rand(219) + 50
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i = 50 + rand(379)
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j = 50 + rand(219)
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line(x, y, i, j, 511)
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}
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Binary file not shown.
@ -1,4 +1,23 @@
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#!/bin/bash
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#
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# @file run.sh
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# Starts openocd and connects gdb to the target, for programming/debugging
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#
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# Copyright (C) 2018 Clyne Sullivan
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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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openocd -f /usr/share/openocd/scripts/board/st_nucleo_l476rg.cfg > /dev/null &
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gdb-multiarch -iex "target remote localhost:3333" out/main.elf
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@ -0,0 +1,110 @@
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#include <stm32l476xx.h>
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#include <gpio.h>
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#include <clock.h>
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#define READ 0x03
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#define WRITE 0x02
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#define WREN 0x06
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#define WRDS 0x04
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#define SCK GPIO_PORT(C, 9)
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#define SI GPIO_PORT(B, 8)
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#define SO GPIO_PORT(B, 9)
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#define CS GPIO_PORT(C, 4)
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void flash_out(uint8_t);
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uint8_t flash_in(void);
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void flash_init(void)
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{
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gpio_mode(SCK, OUTPUT);
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gpio_mode(SI, OUTPUT);
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gpio_mode(CS, OUTPUT);
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gpio_mode(SO, OUTPUT);
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gpio_dout(SO, 0);
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gpio_mode(SO, INPUT);
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gpio_dout(CS, 1);
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gpio_dout(SCK, 0);
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gpio_dout(SI, 0);
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//RCC->AHB3ENR |= RCC_AHB3ENR_QSPIEN;
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//// 10MHz operation, per datasheet
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//QUADSPI->CR &= ~(0xFF << QUADSPI_CR_PRESCALER_Pos);
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//QUADSPI->CR |= 7 << QUADSPI_CR_PRESCALER_Pos;
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//// pick FSEL! 0=1, 1=2
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//// FSIZE = 16, 2^17 bits = 1Mb
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//QUADSPI->DCR = (16 << QUADSPI_DCR_FSIZE_Pos);
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//// Memmap mode, single-spi
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//QUADSPI->CCR = (3 << QUADSPI_CCR_FMODE_Pos) | (1 << QUADSPI_CCR_DMODE_Pos)
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// | (2 << QUADSPI_CCR_ADSIZE_Pos) | (1 << QUADSPI_CCR_ADMODE_Pos)
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// | (1 << QUADSPI_CCR_IMODE_Pos);
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//// TODO CCR also takes instruction byte
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//QUADSPI->CCR |= (READ << QUADSPI_CCR_INSTRUCTION_Pos);
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//QUADSPI->CR |= QUADSPI_CR_EN;
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}
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void flash_out(uint8_t byte)
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{
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for (uint8_t i = 0; i < 8; i++) {
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gpio_dout(SI, (byte & (1 << (7 - i))));
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gpio_dout(SCK, 1);
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gpio_dout(SCK, 0);
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}
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}
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void flash_addr(uint32_t addr)
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{
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for (uint8_t i = 0; i < 24; i++) {
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gpio_dout(SI, (addr & (1 << (23 - i))));
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gpio_dout(SCK, 1);
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gpio_dout(SCK, 0);
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}
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}
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uint8_t flash_in(void)
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{
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uint8_t byte = 0;
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for (uint8_t i = 0; i < 8; i++) {
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gpio_dout(SCK, 1);
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gpio_dout(SCK, 0);
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if (gpio_din(SO))
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byte |= (1 << (7 - i));
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}
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return byte;
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}
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void flash_read(char *buf, uint32_t addr, unsigned int count)
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{
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if (buf == 0)
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return;
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gpio_dout(CS, 0);
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flash_out(READ);
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flash_addr(addr);
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for (unsigned int i = 0; i < count; i++)
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buf[i] = flash_in();
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gpio_dout(CS, 1);
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}
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void flash_write(const char *buf, uint32_t addr, unsigned int count)
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{
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if (buf == 0)
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return;
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gpio_dout(CS, 0);
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flash_out(WREN);
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gpio_dout(CS, 1);
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gpio_dout(CS, 0);
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flash_out(WRITE);
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flash_addr(addr);
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for (unsigned int i = 0; i < count; i++)
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flash_out(buf[i]);
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gpio_dout(CS, 1);
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delay(100);
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//gpio_dout(CS, 0);
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//flash_out(WRDS);
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//gpio_dout(CS, 1);
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}
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@ -1,33 +0,0 @@
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print "Hello."
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set fg 32767
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# draw bg, lines
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rect 50 50 380 220 6375
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line 50 160 430 160 fg
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line 240 50 240 270 fg
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set x 50
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do
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line x 170 x 150 fg
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set x (x + 20)
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while (x < 431)
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set y 50
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do
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line 230 y 250 y fg
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set y (y + 20)
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while (y < 271)
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do
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rand 379 > x
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rand 219 > y
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rand 379 > i
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rand 219 > j
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set x (x + 50)
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set y (y + 50)
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set i (i + 50)
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set j (j + 50)
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line x y i j 511
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while (1)
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@ -1,21 +0,0 @@
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do
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getkey > input
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print input
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delay 1000
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while (1)
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#do
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# getkey > input
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# if (input & 4)
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# rand 479 > x
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# rand 319 > y
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# rand 479 > i
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# rand 319 > j
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# rand 32767 > purple
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#
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# line x y i j purple
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# end
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#while (1)
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#
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#print "done"
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