446 lines
14 KiB
C
446 lines
14 KiB
C
/**
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******************************************************************************
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* @file : main.c
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* @brief : Main program body
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2025 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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/* Private variables ---------------------------------------------------------*/
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UART_HandleTypeDef huart2;
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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_Config(void);
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static void MX_GPIO_Init(void);
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static void MX_USART2_UART_Init(void);
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/* Private user code ---------------------------------------------------------*/
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/**
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* @brief The application entry point.
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* @retval int
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*/
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int main(void)
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{
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/* MCU Configuration--------------------------------------------------------*/
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/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
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HAL_Init();
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/* Configure the system clock */
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SystemClock_Config();
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/* Initialize all configured peripherals */
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MX_GPIO_Init();
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MX_USART2_UART_Init();
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Data_Pins_Init(0);
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Address_Pins_Init();
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Command_Pins_Init();
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int man_id, dev_id;
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Enter_Device_ID(&man_id, &dev_id);
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char *manufacturer = (char*)malloc(13 * sizeof(char));
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char *device = (char*)malloc(13 * sizeof(char));
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sprintf(manufacturer, "0x%02X \r\n", man_id);
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sprintf(device, "0x%02X \r\n", dev_id);
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debug_print("=====================================================================================\r\n");
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debug_print(" _____ _____ _____ _____ _____ _____\r\n");
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debug_print("| __| __| _ | __ | | | ___ ___ ___ ___ ___ ___ _____ _____ ___ ___\r\n");
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debug_print("| __| __| __| -| | | | | | | . | _| . | . | _| .'| | | -_| _|\r\n");
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debug_print("|_____|_____|__| |__|__|_____|_|_|_| | _|_| |___|_ |_| |__,|_|_|_|_|_|_|___|_|\r\n");
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debug_print(" - Ayabusa 2025 |_| |___|\r\n");
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debug_print("=====================================================================================\r\n");
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/* Infinite loop */
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while (1)
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{
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debug_print("Hello welcome to the EEPROM programmer! What would you like to do?\r\n");
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debug_print("[1] Dump Rom as char\r\n");
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debug_print("[2] Erase chip\r\n");
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debug_print("[3] Program chip via UART (ASCII mode)\r\n");
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debug_print("[4] Identify device\r\n");
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debug_print("[5] Dump Rom as file (ASCII mode)\r\n");
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uint8_t resp;
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HAL_UART_Receive(&huart2, &resp, 1, HAL_MAX_DELAY);
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switch (resp)
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{
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case 0x31:
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debug_print("Dumping ROM...\r\n");
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Dump_Flash_UART(1);
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break;
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case 0x32:
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debug_print("Erasing Chip...\r\n");
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Chip_Erase();
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break;
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case 0x33:
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debug_print("Launching programming sequence...\r\n");
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Flash_From_UART();
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break;
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case 0x34:
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debug_print("Identifying device...\r\n");
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debug_print("Manufacturer ID = \r\n");
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debug_print(manufacturer);
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debug_print("Device ID = \r\n");
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debug_print(device);
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break;
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case 0x35:
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debug_print("Dumping ROM as file, press any key...\r\n");
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uint8_t byte;
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HAL_UART_Receive(&huart2, &byte, 1, HAL_MAX_DELAY);
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Dump_Flash_UART(0);
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while(1){}
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default:
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debug_print("Invalid input!\r\n");
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break;
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}
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}
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}
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void Write_Address(int address){
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int pin_array[] = {
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GPIO_PIN_0, GPIO_PIN_1, GPIO_PIN_2, GPIO_PIN_3,
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GPIO_PIN_4, GPIO_PIN_5, GPIO_PIN_6, GPIO_PIN_7,
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GPIO_PIN_8, GPIO_PIN_9, GPIO_PIN_10, GPIO_PIN_11,
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GPIO_PIN_12, GPIO_PIN_13,
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GPIO_PIN_0, GPIO_PIN_1, GPIO_PIN_2, GPIO_PIN_3, GPIO_PIN_4 // These last 3 are our PB pins not the PC ones
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};
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for(int i=0; i<19; i++){
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if(i<14){
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if((address >> i) & 1) HAL_GPIO_WritePin(GPIOC, pin_array[i], GPIO_PIN_SET);
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else HAL_GPIO_WritePin(GPIOC, pin_array[i], GPIO_PIN_RESET);
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}
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else{
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if((address >> i) & 1) HAL_GPIO_WritePin(GPIOB, pin_array[i], GPIO_PIN_SET);
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else HAL_GPIO_WritePin(GPIOB, pin_array[i], GPIO_PIN_RESET);
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}
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}
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}
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int Receive_Data(void){
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Data_Pins_Init(0); // We make sure it's in input mode
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int result = 0;
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int pin_array[] = {
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GPIO_PIN_0, GPIO_PIN_1, GPIO_PIN_11, GPIO_PIN_12,
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GPIO_PIN_4, GPIO_PIN_5, GPIO_PIN_6, GPIO_PIN_7,
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};
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for(int i=0; i<8; i++){
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if(HAL_GPIO_ReadPin(GPIOA, pin_array[i]) == GPIO_PIN_SET){
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result += 1 << i;
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}
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}
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return result;
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}
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void Write_Data(int value){
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Data_Pins_Init(1); // We make sure it's in output mode
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int pin_array[] = {
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GPIO_PIN_0, GPIO_PIN_1, GPIO_PIN_11, GPIO_PIN_12,
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GPIO_PIN_4, GPIO_PIN_5, GPIO_PIN_6, GPIO_PIN_7,
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};
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for(int i=0; i<8; i++){
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if((value >> i) & 1) HAL_GPIO_WritePin(GPIOA, pin_array[i], GPIO_PIN_SET);
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else HAL_GPIO_WritePin(GPIOA, pin_array[i], GPIO_PIN_RESET);
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}
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}
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// All arguments must be 0 (low) or 1 (high)
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void Write_Command_Pins(int CE, int OE, int WE){
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HAL_GPIO_WritePin(GPIOA, GPIO_PIN_8, (CE) ? GPIO_PIN_SET : GPIO_PIN_RESET);
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HAL_GPIO_WritePin(GPIOA, GPIO_PIN_9, (OE) ? GPIO_PIN_SET : GPIO_PIN_RESET);
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HAL_GPIO_WritePin(GPIOA, GPIO_PIN_10,(WE) ? GPIO_PIN_SET : GPIO_PIN_RESET);
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}
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void Write_Command(int addr, int data) {
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Write_Command_Pins(1, 1, 1);
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Write_Address(addr);
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Write_Data(data);
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Write_Command_Pins(0, 1, 1);
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// 4. Pulse WE# low to latch data
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Write_Command_Pins(0, 1, 0); // WE low
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Write_Command_Pins(0, 1, 1); // WE high
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// 5. Deassert CE#
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Write_Command_Pins(1, 1, 1);
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}
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int Flash_ReadByte(int addr) {
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Write_Address(addr);
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Data_Pins_Init(0);
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Write_Command_Pins(0, 0, 1);
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int data = Receive_Data();
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Write_Command_Pins(1, 1, 1);
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return data;
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}
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void Enter_Device_ID(int *manufacturer, int *device){
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// Enter ID mode
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Write_Command(0x5555, 0xAA);
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Write_Command(0x2AAA, 0x55);
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Write_Command(0x5555, 0x90);
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// Read Manufacturer ID (it should be 0xBF)
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*manufacturer = Flash_ReadByte(0x0000);
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// Read Device ID (it should be 0xB7 for the SST39SF040)
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*device = Flash_ReadByte(0x0001);
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// Exit ID mode
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Write_Command(0x5555, 0xF0);
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}
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void Dump_Flash_UART(int visual_format){
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uint8_t byte;
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char buf[8];
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for (int addr = 0; addr < 0x7FFFF; addr++) { // 512 KB
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byte = Flash_ReadByte(addr);
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if(visual_format==0){
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// Send as raw byte:
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HAL_UART_Transmit(&huart2, &byte, 1, HAL_MAX_DELAY);
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}else{
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// Send as str
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sprintf(buf, "%02X ", byte);
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HAL_UART_Transmit(&huart2, (uint8_t*)buf, strlen(buf), HAL_MAX_DELAY);
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if ((addr & 0x0F) == 0x0F) {
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char newline[] = "\r\n";
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HAL_UART_Transmit(&huart2, (uint8_t*)newline, 2, HAL_MAX_DELAY);
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}
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}
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}
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}
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void Chip_Erase(void){
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// Erase sequence
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Write_Command(0x5555, 0xAA);
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Write_Command(0x2AAA, 0x55);
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Write_Command(0x5555, 0x80);
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Write_Command(0x5555, 0xAA);
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Write_Command(0x2AAA, 0x55);
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Write_Command(0x5555, 0x10);
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HAL_Delay(150); // it's 100ms max but by precaution
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}
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void Chip_Program_Byte(int addr, int data){
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Write_Command(0x5555, 0xAA);
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Write_Command(0x2AAA, 0x55);
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Write_Command(0x5555, 0xA0);
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Write_Command(addr, data);
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}
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void Flash_From_UART(void){
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debug_print("Waiting for file to flash...\r\n");
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uint8_t byte;
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for(int i=0; i<8; i++){
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HAL_UART_Receive(&huart2, &byte, 1, HAL_MAX_DELAY);
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Chip_Program_Byte(i, (int)byte);
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}
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debug_print("finished\r\n");
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}
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/**
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* @brief System Clock Configuration
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* @retval None
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*/
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void SystemClock_Config(void)
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{
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RCC_OscInitTypeDef RCC_OscInitStruct = {0};
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RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
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/** Configure the main internal regulator output voltage
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*/
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__HAL_RCC_PWR_CLK_ENABLE();
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
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/** Initializes the RCC Oscillators according to the specified parameters
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* in the RCC_OscInitTypeDef structure.
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*/
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
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RCC_OscInitStruct.HSIState = RCC_HSI_ON;
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RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
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RCC_OscInitStruct.PLL.PLLM = 16;
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RCC_OscInitStruct.PLL.PLLN = 336;
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RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
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RCC_OscInitStruct.PLL.PLLQ = 7;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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{
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Error_Handler();
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}
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/** Initializes the CPU, AHB and APB buses clocks
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*/
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RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
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|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
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{
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Error_Handler();
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}
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}
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/**
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* @brief USART2 Initialization Function
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* @param None
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* @retval None
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*/
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static void MX_USART2_UART_Init(void)
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{
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huart2.Instance = USART2;
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huart2.Init.BaudRate = 115200;
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huart2.Init.WordLength = UART_WORDLENGTH_8B;
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huart2.Init.StopBits = UART_STOPBITS_1;
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huart2.Init.Parity = UART_PARITY_NONE;
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huart2.Init.Mode = UART_MODE_TX_RX;
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huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
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huart2.Init.OverSampling = UART_OVERSAMPLING_16;
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if (HAL_UART_Init(&huart2) != HAL_OK)
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{
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Error_Handler();
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}
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}
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// The argument must be 0 (input) or 1 (output)
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void Data_Pins_Init(int as_output){
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GPIO_InitTypeDef GPIO_InitStruct = {0};
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// Configure PA0..PA7 as push-pull outputs
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GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_11 | GPIO_PIN_12 |
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GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_6 | GPIO_PIN_7;
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if(as_output == 1){
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GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; // Push-pull output
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GPIO_InitStruct.Pull = GPIO_NOPULL; // No pull-up/down
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH; // Fast switching
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}else{
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GPIO_InitStruct.Mode = GPIO_MODE_INPUT; // Input mode
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GPIO_InitStruct.Pull = GPIO_PULLDOWN; // No pull-up/down
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}
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HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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}
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void Address_Pins_Init(void){
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GPIO_InitTypeDef GPIOC_InitStruct = {0};
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// Configure PC0..PC15 as push-pull outputs
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GPIOC_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 |
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GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_6 | GPIO_PIN_7 |
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GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10| GPIO_PIN_11|
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GPIO_PIN_12| GPIO_PIN_13| GPIO_PIN_14| GPIO_PIN_15;
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GPIOC_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; // Push-pull output
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GPIOC_InitStruct.Pull = GPIO_NOPULL; // No pull-up/down
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GPIOC_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH; // Fast switching
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HAL_GPIO_Init(GPIOC, &GPIOC_InitStruct);
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// Then we do the same for the remaining
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GPIO_InitTypeDef GPIOB_InitStruct = {0};
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// Configure PB0..PB2 as push-pull outputs
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GPIOB_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 | GPIO_PIN_4;
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GPIOB_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; // Push-pull output
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GPIOB_InitStruct.Pull = GPIO_NOPULL; // No pull-up/down
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GPIOB_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH; // Fast switching
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HAL_GPIO_Init(GPIOB, &GPIOB_InitStruct);
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}
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void Command_Pins_Init(void){
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// PA8-10 as outputs pins
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GPIO_InitTypeDef GPIOA_InitStruct = {0};
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GPIOA_InitStruct.Pin = GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10;
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GPIOA_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; // Push-pull output
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GPIOA_InitStruct.Pull = GPIO_NOPULL; // No pull-up/down
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GPIOA_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH; // Fast switching
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HAL_GPIO_Init(GPIOA, &GPIOA_InitStruct);
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}
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void debug_print(const char *msg) {
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HAL_UART_Transmit(&huart2, (uint8_t*)msg, strlen(msg), HAL_MAX_DELAY);
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}
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/**
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* @brief GPIO Initialization Function
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* @param None
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* @retval None
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*/
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static void MX_GPIO_Init(void)
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{
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/* GPIO Ports Clock Enable */
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__HAL_RCC_GPIOC_CLK_ENABLE();
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__HAL_RCC_GPIOH_CLK_ENABLE();
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__HAL_RCC_GPIOA_CLK_ENABLE();
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__HAL_RCC_GPIOB_CLK_ENABLE();
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/*Configure GPIO pin Output Level */
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// HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET);
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/*Configure GPIO pin : B1_Pin */
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// GPIO_InitStruct.Pin = B1_Pin;
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// GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
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// GPIO_InitStruct.Pull = GPIO_NOPULL;
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// HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);
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/*Configure GPIO pin : LD2_Pin */
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// GPIO_InitStruct.Pin = LD2_Pin;
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// GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
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// GPIO_InitStruct.Pull = GPIO_NOPULL;
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// GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
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// HAL_GPIO_Init(LD2_GPIO_Port, &GPIO_InitStruct);
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}
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/**
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* @brief This function is executed in case of error occurrence.
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* @retval None
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*/
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void Error_Handler(void)
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{
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/* USER CODE BEGIN Error_Handler_Debug */
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/* User can add his own implementation to report the HAL error return state */
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__disable_irq();
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while (1)
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{
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}
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/* USER CODE END Error_Handler_Debug */
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t *file, uint32_t line)
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{
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/* USER CODE BEGIN 6 */
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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/* USER CODE END 6 */
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}
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#endif /* USE_FULL_ASSERT */
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