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usb-firewall-fork/Downstream/Src/main.c

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8.4 KiB

/**
******************************************************************************
* File Name : main.c
* Description : Main program body
******************************************************************************
*
* COPYRIGHT(c) 2015 STMicroelectronics
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*
* Modifications by Robert Fisk
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_hal.h"
#include "usb_host.h"
#include "board_config.h"
#include "downstream_statemachine.h"
#include "downstream_spi.h"
#include "led.h"
#include "interrupts.h"
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void GPIO_Init(void);
void DisableFlashWrites(void);
void CheckFirmwareMatchesHardware(void);
int main(void)
{
uint32_t iterationCount = 0;
//First things first!
DisableFlashWrites();
CheckFirmwareMatchesHardware();
/* Configure the system clock */
SystemClock_Config();
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* Initialize all configured peripherals */
GPIO_Init();
LED_Init();
USB_Host_Init();
Downstream_InitStateMachine();
while (1)
{
USB_Host_Process();
Downstream_SPIProcess();
Downstream_PacketProcessor_CheckNotifyDisconnectReply();
//Some USB host state transitions take 3 iterations to fully apply.
//We'll be generous and give it 5 before sleeping.
iterationCount++;
if (iterationCount > 4)
{
iterationCount = 0;
__WFI(); //sleep time!
}
}
}
void DisableFlashWrites(void)
{
//Disable flash writes until the next reset
//This will cause a bus fault interrupt, so allow one now.
EnableOneBusFault();
FLASH->KEYR = 999;
//Confirm that flash cannot be unlocked
//This unlock attempt will also cause a bus fault.
EnableOneBusFault();
if ((FLASH->CR & FLASH_CR_LOCK) == 0) while(1);
FLASH->KEYR = FLASH_KEY1;
FLASH->KEYR = FLASH_KEY2;
if ((FLASH->CR & FLASH_CR_LOCK) == 0) while(1);
}
void CheckFirmwareMatchesHardware(void)
{
//Check we are running on the expected hardware:
//STM32F401RC on USG v1.0 beta
GPIO_InitTypeDef GPIO_InitStruct;
if ((*(uint32_t*)DBGMCU_BASE & DBGMCU_IDCODE_DEV_ID) == DBGMCU_IDCODE_DEV_ID_401xB_xC)
{
//Read in board revision and ID on port C
__HAL_RCC_GPIOC_CLK_ENABLE();
GPIO_InitStruct.Pin = BOARD_REV_PIN_MASK | BOARD_ID_PIN_MASK;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
GPIO_InitStruct.Alternate = 0;
HAL_GPIO_Init(BOARD_REV_ID_PORT, &GPIO_InitStruct);
//Correct board revision?
if ((BOARD_REV_ID_PORT->IDR & BOARD_REV_PIN_MASK) == BOARD_REV_1_0_BETA)
{
//Correct board ID: downstream?
if (!(BOARD_REV_ID_PORT->IDR & BOARD_ID_PIN_MASK))
{
return;
}
}
}
//This is not the hardware we expected, so turn on our fault LED(s) and die in a heap.
GPIO_InitStruct.Pin = FAULT_LED_PIN | H405_FAULT_LED_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(FAULT_LED_PORT, &GPIO_InitStruct);
FAULT_LED_ON;
H405_FAULT_LED_ON;
while (1);
}
/** System Clock Configuration
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
__PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 8;
RCC_OscInitStruct.PLL.PLLN = 336;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
RCC_OscInitStruct.PLL.PLLQ = 7;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) while (1);
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK |
RCC_CLOCKTYPE_HCLK |
RCC_CLOCKTYPE_PCLK1 |
RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) while (1);
HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
}
void GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
/* GPIO Ports Clock Enable */
//__GPIOH_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
//Bulk initialise all ports as inputs with pullups active,
//excluding JTAG pins which must remain as AF0!
GPIO_InitStruct.Pin = (GPIO_PIN_All & ~(PA_JTMS | PA_JTCK | PA_JTDI));
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
GPIO_InitStruct.Alternate = 0;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = (GPIO_PIN_All & ~(PB_JTDO | PB_NJTRST));
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_All;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
//Fault LED is output
GPIO_InitStruct.Pin = FAULT_LED_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(FAULT_LED_PORT, &GPIO_InitStruct);
FAULT_LED_OFF;
// //SPI_INT_ACTIVE indicator
// GPIO_InitStruct.Pin = INT_ACTIVE_PIN;
// HAL_GPIO_Init(INT_ACTIVE_PORT, &GPIO_InitStruct);
// INT_ACTIVE_OFF;
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/