fruchti/hpgl_xy
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Remove USB pull-up code

Browse source
This commit is contained in:
fruchti 2021-04-04 20:17:12 +02:00
parent 3ca6ea3e9e
commit fc91c5a032
3 changed files with 4 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

2
stm32f103c8t6-bootloader/build_number.txt
View file

@ -1 +1 @@
434
436

1
stm32f103c8t6-bootloader/src/pinning.h
View file

@ -7,7 +7,6 @@
#define PIN_UART_RX 10 // PA10 - USART1_RX
#define PIN_USB_DM 11 // PA11 - USB_DM
#define PIN_USB_DP 12 // PA12 - USB_DP
#define PIN_USB_PULLUP 15 // PA15 - 1.5 kΩ to D+
// Port B
#define PIN_LED 0 // PB0 - Status LED

11
stm32f103c8t6-bootloader/src/usb.c
View file

@ -6,7 +6,6 @@
#include "ownership.h"
MODULE_OWNS_PERIPHERAL(USB);
MODULE_OWNS_PIN(GPIOA, PIN_USB_PULLUP);
MODULE_OWNS_PIN(GPIOA, PIN_USB_DM);
MODULE_OWNS_PIN(GPIOA, PIN_USB_DP);
@ -15,19 +14,13 @@ volatile unsigned int USB_Address = 0;
void USB_Init(void)
{
// Free PA15 (pullup for D+) for use as GPIO
AFIO->MAPR = AFIO_MAPR_SWJ_CFG_JTAGDISABLE;
// Initialise USB GPIOs to AF mode, set pullup high
// Initialise USB GPIOs to AF mode
// Note: This will reset the test point pin to an input without pullup
GPIOA->ODR = 1 << PIN_USB_PULLUP;
GPIOA->CRH = (0x44444444
& ~(0x0f << (PIN_USB_DM * 4 - 32))
& ~(0x0f << (PIN_USB_DP * 4 - 32))
& ~(0x0f << (PIN_USB_PULLUP * 4 - 32)))
& ~(0x0f << (PIN_USB_DP * 4 - 32)))
| (0x0b << (PIN_USB_DM * 4 - 32)) // AF mode, 50 MHz
| (0x0b << (PIN_USB_DP * 4 - 32)) // AF mode, 50 MHz
| (0x01 << (PIN_USB_PULLUP * 4 - 32)) // Push-pull output, 10 MHz
;
Util_Delay(100000);