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Testing USB on STM32L4.

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This commit is contained in:
NIIBE Yutaka
2019-04-18 17:12:14 +09:00
parent 1f159888a0
commit 359082f80a
13 changed files with 215 additions and 69 deletions
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10
mcu/clk_gpio_init-stm32l.c
View File

@@ -55,6 +55,16 @@ clock_init (void)
RCC->CFGR |= 0x03;
while ((RCC->CFGR & 0x0C) != 0x0C)
;
/* Peripheral clock selection */
RCC->CCIPR = ( (0x00 << 26) | /* HSI48 for USB */
(0x00 << 2) | /* PCLK for USART2 */
(0x00 << 0) ); /* PCLK for USART1 */
/* Enable HSI48 clock */
RCC->CRRCR |= 1;
while ((RCC->CRRCR & 0x02) == 0)
;
}
static struct GPIO *const GPIO_LED = (struct GPIO *)GPIO_LED_BASE;

23
mcu/stm32l.h
View File

@@ -109,17 +109,10 @@ struct GPIO {
};
#define GPIOA_BASE (AHB2PERIPH_BASE)
#define GPIOA ((struct GPIO *) GPIOA_BASE)
static struct GPIO *const GPIOA = (struct GPIO *)GPIOA_BASE;
#define GPIOB_BASE (AHB2PERIPH_BASE + 0x0400)
#define GPIOB ((struct GPIO *) GPIOB_BASE)
#define GPIOC_BASE (AHB2PERIPH_BASE + 0x0800)
#define GPIOC ((struct GPIO *) GPIOC_BASE)
#define GPIOD_BASE (AHB2PERIPH_BASE + 0x0C00)
#define GPIOD ((struct GPIO *) GPIOD_BASE)
#define GPIOE_BASE (AHB2PERIPH_BASE + 0x1000)
#define GPIOE ((struct GPIO *) GPIOE_BASE)
#define GPIOH_BASE (AHB2PERIPH_BASE + 0x1C00)
#define GPIOH ((struct GPIO *) GPIOH_BASE)
static struct GPIO *const GPIOB = (struct GPIO *)GPIOB_BASE;
struct FLASH {
volatile uint32_t ACR;
@@ -139,3 +132,13 @@ struct FLASH {
#define FLASH_R_BASE (AHB1PERIPH_BASE + 0x2000)
static struct FLASH *const FLASH = (struct FLASH *)FLASH_R_BASE;
struct USB_STM32L4 {
volatile uint16_t LPMCSR;
volatile uint16_t reserved0;
volatile uint16_t BCDR;
volatile uint16_t reserved1;
};
#define USB_STM32L4_BASE (0x40006854UL)
static struct USB_STM32L4 *const USB_STM32L4 = (struct USB_STM32L4 *)USB_STM32L4_BASE;

74
mcu/sys-stm32l4.c
View File

@@ -47,16 +47,25 @@ static void wait (int count)
void
usb_lld_sys_shutdown (void)
{
USB_STM32L4->BCDR &= 0x7fff; /* DP disable */
RCC->APB1ENR1 &= ~(RCC_APB1_1_USB | RCC_APB1_1_CRS);
RCC->APB1RSTR1 |= (RCC_APB1_1_USB | RCC_APB1_1_CRS);
}
struct CRS
{
volatile uint32_t CR;
volatile uint32_t CFGR;
volatile uint32_t ISR;
volatile uint32_t ICR;
};
static struct CRS *const CRS = ((struct CRS *)(APB1PERIPH_BASE + 0x6000));
void
usb_lld_sys_init (void)
{
/* XXX: should configure CRS (clock recovery system) and HSI48 clock */
if ((RCC->APB1ENR1 & RCC_APB1_1_USB)
if ((RCC->APB1ENR1 & RCC_APB1_1_USB)
&& (RCC->APB1RSTR1 & RCC_APB1_1_USB) == 0)
/* Make sure the device is disconnected, even after core reset. */
{
@@ -65,10 +74,46 @@ usb_lld_sys_init (void)
wait (5*MHZ);
}
/* Enable USB clock and CRC clock */
RCC->APB1ENR1 |= (RCC_APB1_1_USB | RCC_APB1_1_CRS);
RCC->APB1RSTR1 = (RCC_APB1_1_USB | RCC_APB1_1_CRS);
RCC->APB1RSTR1 = 0;
USB_STM32L4->BCDR |= 0x8000; /* DP enable */
/* Configure CRS (clock recovery system) for HSI48 clock */
CRS->CFGR = ( (0x00 << 31) | /* Polarity rising */
(0x02 << 28) | /* USB SOF for Sync */
(0x00 << 24) | /* divider = 1 */
(0x22 << 16) | /* Frequency error limit */
0xBB7F ); /* Reload value */
CRS->CR |= ( (1 << 6) | /* Automatic trimming enable */
(1 << 5) ); /* Frequency error counter enable */
}
void
nvic_system_reset (void)
{
SCB->AIRCR = (0x05FA0000 | (SCB->AIRCR & 0x70) | SCB_AIRCR_SYSRESETREQ);
asm volatile ("dsb");
for (;;);
}
const uint8_t sys_version[8] __attribute__((section(".sys.version"))) = {
3*2+2, /* bLength */
0x03, /* bDescriptorType = USB_STRING_DESCRIPTOR_TYPE */
/* sys version: "3.0" */
'3', 0, '.', 0, '0', 0,
};
#if defined(USE_SYS3) || defined(USE_SYS_BOARD_ID)
const uint32_t __attribute__((section(".sys.board_id")))
sys_board_id = BOARD_ID;
const uint8_t __attribute__((section(".sys.board_name")))
sys_board_name[] = BOARD_NAME;
#endif
/* Not yet implemented, API should be reconsidered */
@@ -133,26 +178,3 @@ flash_erase_all_and_exec (void (*entry)(void))
{
(void)entry;
}
void
nvic_system_reset (void)
{
SCB->AIRCR = (0x05FA0000 | (SCB->AIRCR & 0x70) | SCB_AIRCR_SYSRESETREQ);
asm volatile ("dsb");
for (;;);
}
const uint8_t sys_version[8] __attribute__((section(".sys.version"))) = {
3*2+2, /* bLength */
0x03, /* bDescriptorType = USB_STRING_DESCRIPTOR_TYPE */
/* sys version: "3.0" */
'3', 0, '.', 0, '0', 0,
};
#if defined(USE_SYS3) || defined(USE_SYS_BOARD_ID)
const uint32_t __attribute__((section(".sys.board_id")))
sys_board_id = BOARD_ID;
const uint8_t __attribute__((section(".sys.board_name")))
sys_board_name[] = BOARD_NAME;
#endif

2
mcu/usb-st-common.c
View File

@@ -41,7 +41,7 @@ struct USB {
volatile uint16_t reserved4;
};
struct USB *const USB = (struct USB *)REG_BASE;
static struct USB *const USB = (struct USB *)REG_BASE;
#define ISTR_CTR (0x8000) /* Correct TRansfer (read-only bit) */
#define ISTR_OVR (0x4000) /* OVeR/underrun (clear-only bit) */

2
mcu/usb-stm32f103.c
View File

@@ -119,7 +119,7 @@ handle_setup0 (struct usb_dev *dev)
uint8_t req_no;
HANDLER handler;
pw = (uint16_t *)(PMA_ADDR + (uint8_t *)(epbuf_get_rx_addr (ENDP0) * 2));
pw = (uint16_t *)(PMA_ADDR + (epbuf_get_rx_addr (ENDP0) * 2));
w = *pw++;
dev->dev_req.type = (w & 0xff);

16
mcu/usb-stm32l.c → mcu/usb-stm32l4.c
View File

@@ -1,5 +1,5 @@
/*
* usb-stm32l.c - USB driver for STM32L
* usb-stm32l4.c - USB driver for STM32L4
*
* Copyright (C) 2019 Flying Stone Technology
* Author: NIIBE Yutaka <gniibe@fsij.org>
@@ -29,7 +29,7 @@
#include <stdint.h>
#include <stdlib.h>
#include "sys-stm32l.h"
#include "sys-stm32l4.h"
#include "usb_lld.h"
#include "usb_lld_driver.h"
@@ -119,7 +119,7 @@ handle_setup0 (struct usb_dev *dev)
uint8_t req_no;
HANDLER handler;
pw = (uint16_t *)(PMA_ADDR + (uint8_t *)(epbuf_get_rx_addr (ENDP0)));
pw = (uint16_t *)(PMA_ADDR + epbuf_get_rx_addr (ENDP0));
w = *pw++;
dev->dev_req.type = (w & 0xff);
@@ -174,22 +174,20 @@ usb_lld_to_pmabuf (const void *src, uint16_t addr, size_t n)
if ((addr & 1))
{
p = (uint16_t *)(PMA_ADDR + (addr - 1) * 2);
p = (uint16_t *)(PMA_ADDR + (addr - 1));
w = *p;
w = (w & 0xff) | (*s++) << 8;
*p = w;
p += 2;
*p++ = w;
n--;
}
else
p = (uint16_t *)(PMA_ADDR + addr * 2);
p = (uint16_t *)(PMA_ADDR + addr);
while (n >= 2)
{
w = *s++;
w |= (*s++) << 8;
*p = w;
p += 2;
*p++ = w;
n -= 2;
}