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solo1/targets/stm32l432/src/init.c

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/*
* Copyright (C) 2018 SoloKeys, Inc. <https://solokeys.com/>
*
* This file is part of Solo.
*
* Solo is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Solo is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Solo. If not, see <https://www.gnu.org/licenses/>
*
* This code is available under licenses for commercial use.
* Please contact SoloKeys for more information.
*/
#include <stdint.h>
#include "stm32l4xx.h"
#include "stm32l4xx_ll_gpio.h"
#include "stm32l4xx_ll_rcc.h"
#include "stm32l4xx_ll_crs.h"
#include "stm32l4xx_ll_system.h"
#include "stm32l4xx_ll_pwr.h"
#include "stm32l4xx_ll_utils.h"
#include "stm32l4xx_ll_cortex.h"
#include "stm32l4xx_ll_gpio.h"
#include "stm32l4xx_ll_usart.h"
#include "stm32l4xx_ll_bus.h"
#include "stm32l4xx_ll_tim.h"
#include "stm32l4xx_ll_rng.h"
#include "stm32l4xx_ll_usb.h"
#include "stm32l4xx_hal_pcd.h"
#include "stm32l4xx_hal.h"
#include "usbd_core.h"
#include "usbd_desc.h"
#include "usbd_hid.h"
#include "usbd_cdc.h"
#include "usbd_composite.h"
#include "usbd_cdc_if.h"
#include "device.h"
#include APP_CONFIG
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private variables ---------------------------------------------------------*/
USBD_HandleTypeDef Solo_USBD_Device;
/* Private function prototypes -----------------------------------------------*/
static void LL_Init(void);
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);
static void MX_TIM2_Init(void);
static void MX_TIM6_Init(void);
static void MX_RNG_Init(void);
#define Error_Handler() _Error_Handler(__FILE__,__LINE__)
void _Error_Handler(char *file, int line);
void hw_init(void)
{
#ifdef IS_BOOTLOADER
SCB->VTOR = FLASH_BASE;
#else
#endif
LL_Init();
SET_BIT(RCC->APB1ENR1, RCC_APB1ENR1_PWREN);
SystemClock_Config(); // TODO bootloader should not change clk freq.
MX_GPIO_Init();
MX_TIM2_Init(); // PWM for LEDs
MX_TIM6_Init(); // ~1 ms timer
#if DEBUG_LEVEL > 0
MX_USART1_UART_Init();// debug uart
#endif
MX_RNG_Init();
TIM6->SR = 0;
__enable_irq();
NVIC_EnableIRQ(TIM6_IRQn);
}
static void LL_Init(void)
{
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_SYSCFG);
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
NVIC_SetPriorityGrouping(4);
/* System interrupt init*/
/* MemoryManagement_IRQn interrupt configuration */
NVIC_SetPriority(MemoryManagement_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0));
/* BusFault_IRQn interrupt configuration */
NVIC_SetPriority(BusFault_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0));
/* UsageFault_IRQn interrupt configuration */
NVIC_SetPriority(UsageFault_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0));
/* SVCall_IRQn interrupt configuration */
NVIC_SetPriority(SVCall_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0));
/* DebugMonitor_IRQn interrupt configuration */
NVIC_SetPriority(DebugMonitor_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0));
/* PendSV_IRQn interrupt configuration */
NVIC_SetPriority(PendSV_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0));
/* SysTick_IRQn interrupt configuration */
NVIC_SetPriority(SysTick_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0));
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
LL_FLASH_SetLatency(LL_FLASH_LATENCY_2);
if(LL_FLASH_GetLatency() != LL_FLASH_LATENCY_2)
{
Error_Handler();
}
LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE1);
LL_RCC_HSI48_Enable();
/* Wait till HSI48 is ready */
while(LL_RCC_HSI48_IsReady() != 1)
{
}
LL_RCC_MSI_Enable();
/* Wait till MSI is ready */
while(LL_RCC_MSI_IsReady() != 1)
{
}
LL_RCC_MSI_EnableRangeSelection();
LL_RCC_MSI_SetRange(LL_RCC_MSIRANGE_11);
LL_RCC_MSI_SetCalibTrimming(0);
LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_MSI);
/* Wait till System clock is ready */
while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_MSI)
{
}
LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_16);
LL_Init1msTick(48000000);
LL_SYSTICK_SetClkSource(LL_SYSTICK_CLKSOURCE_HCLK);
LL_SetSystemCoreClock(48000000);
LL_RCC_SetUSARTClockSource(LL_RCC_USART1_CLKSOURCE_PCLK2);
LL_RCC_SetUSBClockSource(LL_RCC_USB_CLKSOURCE_HSI48);
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_CRS);
LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_CRS);
LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_CRS);
LL_CRS_SetSyncDivider(LL_CRS_SYNC_DIV_1);
LL_CRS_SetSyncPolarity(LL_CRS_SYNC_POLARITY_RISING);
LL_CRS_SetSyncSignalSource(LL_CRS_SYNC_SOURCE_USB);
LL_CRS_SetReloadCounter(__LL_CRS_CALC_CALCULATE_RELOADVALUE(48000000,1000));
LL_CRS_SetFreqErrorLimit(34);
LL_CRS_SetHSI48SmoothTrimming(32);
/* SysTick_IRQn interrupt configuration */
NVIC_SetPriority(SysTick_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0));
}
void usb_init()
{
// enable USB power
SET_BIT(PWR->CR2, PWR_CR2_USV);
// Enable USB Clock
SET_BIT(RCC->APB1ENR1, RCC_APB1ENR1_USBFSEN);
USBD_Composite_Set_Classes(&USBD_HID, &USBD_CDC);
in_endpoint_to_class[HID_EPIN_ADDR & 0x7F] = 0;
out_endpoint_to_class[HID_EPOUT_ADDR & 0x7F] = 0;
in_endpoint_to_class[CDC_IN_EP & 0x7F] = 1;
out_endpoint_to_class[CDC_OUT_EP & 0x7F] = 1;
USBD_Init(&Solo_USBD_Device, &Solo_Desc, 0);
USBD_RegisterClass(&Solo_USBD_Device, &USBD_Composite);
// USBD_RegisterClass(&Solo_USBD_Device, &USBD_HID);
//
// USBD_RegisterClass(&Solo_USBD_Device, &USBD_CDC);
USBD_CDC_RegisterInterface(&Solo_USBD_Device, &USBD_Interface_fops_FS);
USBD_Start(&Solo_USBD_Device);
}
/* TIM2 init function */
static void MX_TIM2_Init(void)
{
LL_TIM_InitTypeDef TIM_InitStruct;
LL_TIM_OC_InitTypeDef TIM_OC_InitStruct;
LL_GPIO_InitTypeDef GPIO_InitStruct;
/* Peripheral clock enable */
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_TIM2);
TIM2->SR = 0 ;
TIM_InitStruct.Prescaler = 0;
TIM_InitStruct.CounterMode = LL_TIM_COUNTERMODE_UP;
TIM_InitStruct.Autoreload = 1000;
TIM_InitStruct.ClockDivision = LL_TIM_CLOCKDIVISION_DIV1;
LL_TIM_Init(TIM2, &TIM_InitStruct);
LL_TIM_EnableARRPreload(TIM2);
LL_TIM_SetClockSource(TIM2, LL_TIM_CLOCKSOURCE_INTERNAL);
TIM_OC_InitStruct.OCMode = LL_TIM_OCMODE_PWM1;
TIM_OC_InitStruct.OCState = LL_TIM_OCSTATE_ENABLE;
TIM_OC_InitStruct.OCNState = LL_TIM_OCSTATE_ENABLE;
TIM_OC_InitStruct.CompareValue = 1000;
TIM_OC_InitStruct.OCPolarity = LL_TIM_OCPOLARITY_HIGH;
LL_TIM_OC_Init(TIM2, LL_TIM_CHANNEL_CH2, &TIM_OC_InitStruct);
LL_TIM_OC_DisableFast(TIM2, LL_TIM_CHANNEL_CH2);
TIM_OC_InitStruct.OCState = LL_TIM_OCSTATE_ENABLE;
TIM_OC_InitStruct.OCNState = LL_TIM_OCSTATE_ENABLE;
LL_TIM_OC_Init(TIM2, LL_TIM_CHANNEL_CH3, &TIM_OC_InitStruct);
LL_TIM_OC_DisableFast(TIM2, LL_TIM_CHANNEL_CH3);
TIM_OC_InitStruct.OCState = LL_TIM_OCSTATE_ENABLE;
TIM_OC_InitStruct.OCNState = LL_TIM_OCSTATE_ENABLE;
LL_TIM_OC_Init(TIM2, LL_TIM_CHANNEL_CH4, &TIM_OC_InitStruct);
LL_TIM_OC_DisableFast(TIM2, LL_TIM_CHANNEL_CH4);
LL_TIM_SetOCRefClearInputSource(TIM2, LL_TIM_OCREF_CLR_INT_NC);
LL_TIM_DisableExternalClock(TIM2);
LL_TIM_ConfigETR(TIM2, LL_TIM_ETR_POLARITY_NONINVERTED, LL_TIM_ETR_PRESCALER_DIV1, LL_TIM_ETR_FILTER_FDIV1);
LL_TIM_SetTriggerOutput(TIM2, LL_TIM_TRGO_RESET);
LL_TIM_DisableMasterSlaveMode(TIM2);
/**TIM2 GPIO Configuration
PA1 ------> TIM2_CH2
PA2 ------> TIM2_CH3
PA3 ------> TIM2_CH4
*/
GPIO_InitStruct.Pin = LL_GPIO_PIN_1|LL_GPIO_PIN_2|LL_GPIO_PIN_3;
GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
GPIO_InitStruct.Alternate = LL_GPIO_AF_1;
LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
LL_TIM_EnableCounter(TIM2);
}
/* USART1 init function */
static void MX_USART1_UART_Init(void)
{
LL_USART_InitTypeDef USART_InitStruct;
LL_GPIO_InitTypeDef GPIO_InitStruct;
/* Peripheral clock enable */
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_USART1);
/**USART1 GPIO Configuration
PB6 ------> USART1_TX
PB7 ------> USART1_RX
*/
GPIO_InitStruct.Pin = LL_GPIO_PIN_6|LL_GPIO_PIN_7;
GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
GPIO_InitStruct.Alternate = LL_GPIO_AF_7;
LL_GPIO_Init(GPIOB, &GPIO_InitStruct);
USART_InitStruct.BaudRate = 115200;
USART_InitStruct.DataWidth = LL_USART_DATAWIDTH_8B;
USART_InitStruct.StopBits = LL_USART_STOPBITS_1;
USART_InitStruct.Parity = LL_USART_PARITY_NONE;
USART_InitStruct.TransferDirection = LL_USART_DIRECTION_TX_RX;
USART_InitStruct.HardwareFlowControl = LL_USART_HWCONTROL_NONE;
USART_InitStruct.OverSampling = LL_USART_OVERSAMPLING_16;
LL_USART_Init(USART1, &USART_InitStruct);
LL_USART_ConfigAsyncMode(USART1);
LL_USART_Enable(USART1);
}
/** Pinout Configuration
*/
static void MX_GPIO_Init(void)
{
/* GPIO Ports Clock Enable */
LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOA);
LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOB);
}
/* TIM6 init function */
static void MX_TIM6_Init(void)
{
LL_TIM_InitTypeDef TIM_InitStruct;
/* Peripheral clock enable */
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_TIM6);
// 48 MHz sys clock --> 6 MHz timer clock
// 48 MHz / 48000 == 1000 Hz
TIM_InitStruct.Prescaler = 48000;
TIM_InitStruct.CounterMode = LL_TIM_COUNTERMODE_UP;
TIM_InitStruct.Autoreload = 90;
LL_TIM_Init(TIM6, &TIM_InitStruct);
LL_TIM_DisableARRPreload(TIM6);
LL_TIM_SetTriggerOutput(TIM6, LL_TIM_TRGO_RESET);
LL_TIM_DisableMasterSlaveMode(TIM6);
// enable interrupt
TIM6->DIER |= 1;
// Start immediately
LL_TIM_EnableCounter(TIM6);
}
/* TIM7 init function */
// static void MX_TIM7_Init(void)
// {
//
// LL_TIM_InitTypeDef TIM_InitStruct;
//
// /* Peripheral clock enable */
// LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_TIM7);
//
// // 48 MHz sys clock --> 6 MHz timer clock
// // 6 MHz / 6000 == 1000 Hz
// TIM_InitStruct.Prescaler = 48000;
// TIM_InitStruct.CounterMode = LL_TIM_COUNTERMODE_UP;
// TIM_InitStruct.Autoreload = 0xffff;
// LL_TIM_Init(TIM6, &TIM_InitStruct);
//
// LL_TIM_DisableARRPreload(TIM7);
//
// LL_TIM_SetTriggerOutput(TIM7, LL_TIM_TRGO_RESET);
//
// LL_TIM_DisableMasterSlaveMode(TIM7);
//
// // enable interrupt
// TIM7->DIER |= 1;
//
// // Start immediately
// LL_TIM_EnableCounter(TIM7);
// }
/* RNG init function */
static void MX_RNG_Init(void)
{
/* Peripheral clock enable */
LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_RNG);
LL_RNG_Enable(RNG);
}
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