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/* metadata:
manufacturer: WCH
*/
#include <stdio.h>
// https://github.com/openwch/ch32v307/pull/90
// https://github.com/openwch/ch32v20x/pull/12
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wstrict-prototypes"
#endif
#include "ch32v10x.h"
#include "ch32v10x_it.h"
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
#include "bsp/board_api.h"
#include "board.h"
__attribute__((interrupt)) __attribute__((used))
void USBHD_IRQHandler(void) {
#if CFG_TUD_WCH_USBIP_USBFS
tud_int_handler(0);
#endif
}
__attribute__((interrupt)) __attribute__((used))
void USBWakeUp_IRQHandler(void) {
#if CFG_TUD_WCH_USBIP_USBFS
tud_int_handler(0);
#endif
}
#if CFG_TUSB_OS == OPT_OS_NONE
volatile uint32_t system_ticks = 0;
__attribute__((interrupt)) __attribute__((used))
void SysTick_Handler(void) {
SysTick->CNTL0 = SysTick->CNTL1 = SysTick->CNTL2 = SysTick->CNTL3 = 0;
SysTick->CNTH0 = SysTick->CNTH1 = SysTick->CNTH2 = SysTick->CNTH3 = 0;
system_ticks++;
}
static uint32_t SysTick_Config(uint32_t ticks) {
NVIC_EnableIRQ(SysTicK_IRQn);
SysTick->CTLR = 0;
SysTick->CNTL0 = SysTick->CNTL1 = SysTick->CNTL2 = SysTick->CNTL3 = 0;
SysTick->CNTH0 = SysTick->CNTH1 = SysTick->CNTH2 = SysTick->CNTH3 = 0;
SysTick->CMPLR0 = (u8)(ticks & 0xFF);
SysTick->CMPLR1 = (u8)(ticks >> 8);
SysTick->CMPLR2 = (u8)(ticks >> 16);
SysTick->CMPLR3 = (u8)(ticks >> 24);
SysTick->CMPHR0 = SysTick->CMPHR1 = SysTick->CMPHR2 = SysTick->CMPHR3 = 0;
SysTick->CTLR = 1;
return 0;
}
uint32_t tusb_time_millis_api(void) {
return system_ticks;
}
#endif
void board_init(void) {
/* Do NOT toggle the global interrupt enable here.
* CH32V103 startup enters U-mode (mret with mstatus.MPP=0), so:
* - the SDK __disable_irq()/__enable_irq() write mstatus, which faults in U-mode;
* - writing CSR 0x800 (INTSYSCR) corrupts the QingKe V3 interrupt-mode config,
* which made the USB interrupt vector to a bad address (PC=0) and hang.
* The startup already leaves interrupts correctly configured, and machine-mode
* interrupts are globally enabled while running in U-mode regardless of mstatus.MIE. */
#if CFG_TUSB_OS == OPT_OS_NONE
SysTick_Config(SystemCoreClock / 1000);
#endif
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
EXTEN->EXTEN_CTR |= EXTEN_USBFS_IO_EN;
uint8_t usb_div;
switch (SystemCoreClock) {
case 48000000: usb_div = RCC_USBCLKSource_PLLCLK_Div1; break;
case 72000000: usb_div = RCC_USBCLKSource_PLLCLK_1Div5; break;
default: TU_ASSERT(0,); break;
}
RCC_USBCLKConfig(usb_div);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_USBFS, ENABLE);
#ifdef LED_PIN
GPIO_InitTypeDef led_init = {
.GPIO_Pin = LED_PIN,
.GPIO_Mode = GPIO_Mode_Out_OD,
.GPIO_Speed = GPIO_Speed_50MHz,
};
GPIO_Init(LED_PORT, &led_init);
#endif
#ifdef BUTTON_PIN
GPIO_InitTypeDef button_init = {
.GPIO_Pin = BUTTON_PIN,
.GPIO_Mode = GPIO_Mode_IPU,
.GPIO_Speed = GPIO_Speed_50MHz,
};
GPIO_Init(BUTTON_PORT, &button_init);
#endif
// UART TX is PA9
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
GPIO_InitTypeDef usart_init = {
.GPIO_Pin = GPIO_Pin_9,
.GPIO_Speed = GPIO_Speed_50MHz,
.GPIO_Mode = GPIO_Mode_AF_PP,
};
GPIO_Init(GPIOA, &usart_init);
USART_InitTypeDef usart = {
.USART_BaudRate = 115200,
.USART_WordLength = USART_WordLength_8b,
.USART_StopBits = USART_StopBits_1,
.USART_Parity = USART_Parity_No,
.USART_Mode = USART_Mode_Tx,
.USART_HardwareFlowControl = USART_HardwareFlowControl_None,
};
USART_Init(USART1, &usart);
USART_Cmd(USART1, ENABLE);
board_led_write(true);
}
void board_led_write(bool state) {
GPIO_WriteBit(LED_PORT, LED_PIN, state ? LED_STATE_ON : (1-LED_STATE_ON));
}
uint32_t board_button_read(void) {
return BUTTON_STATE_ACTIVE == GPIO_ReadInputDataBit(BUTTON_PORT, BUTTON_PIN);
}
size_t board_get_unique_id(uint8_t id[], size_t max_len) {
(void) max_len;
volatile uint32_t* ch32_uuid = ((volatile uint32_t*) 0x1FFFF7E8UL);
uint32_t* serial_32 = (uint32_t*) (uintptr_t) id;
serial_32[0] = ch32_uuid[0];
serial_32[1] = ch32_uuid[1];
serial_32[2] = ch32_uuid[2];
return 12;
}
int board_uart_read(uint8_t *buf, int len) {
(void) buf;
(void) len;
return 0;
}
int board_uart_write(void const *buf, int len) {
uint8_t const *p = (uint8_t const *) buf;
int count = 0;
while (count < len) {
if (USART_GetFlagStatus(USART1, USART_FLAG_TC) != RESET) {
USART_SendData(USART1, p[count]);
count++;
} else {
break;
}
}
return count;
}
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