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#include <stdbool.h>
#include "main.h"
#include "usb_device.h"
#include "usbd_hid.h"
#define HID_MEDIA_REPORT 2
#define HYSTERESIS 200
ADC_HandleTypeDef hadc;
DMA_HandleTypeDef hdma_adc;
PCD_HandleTypeDef hpcd_USB_FS;
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
enum keybits {
KEYBITS_VOL_UP = 0x20,
KEYBITS_VOL_DOWN = 0x40,
};
void sendKeybits(uint8_t keybits);
struct key_t
{
uint8_t id;
uint8_t modifier;
uint8_t reserved;
uint8_t keycode[6];
} key;
uint16_t ADCreg[8];
uint16_t ADCval[8];
uint16_t ADClast[8];
/* FIXME debug remove */
TIM_TypeDef *tim1 = TIM1;
TIM_TypeDef *tim3 = TIM3;
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_USB_HID_INIT();
__HAL_RCC_TIM1_CLK_ENABLE();
__HAL_RCC_TIM3_CLK_ENABLE();
TIM1->SMCR = 3; // Encoder mode 3
TIM1->CCER = 0; // rising edge polarity
TIM1->ARR = 0xFFFF; // count from 0-ARR or ARR-0
TIM1->CCMR1 = 0x0101; // f_DTS/16, N=8, IC1->TI1, IC2->TI2
TIM1->CNT = 0; // Initialize counter
TIM1->EGR = 1; // Generate an update event
TIM1->CR1 = 1; // Enable the counter
TIM3->SMCR = 3; // Encoder mode 3
TIM3->CCER = 0; // rising edge polarity
TIM3->ARR = 0xFFFF; // count from 0-ARR or ARR-0
TIM3->CCMR1 = 0x0101; // f_DTS/16, N=8, IC1->TI1, IC2->TI2
TIM3->CNT = 0; // Initialize counter
TIM3->EGR = 1; // Generate an update event
TIM3->CR1 = 1; // Enable the counter
uint16_t tim1_last = TIM1->CNT, tim3_last = TIM3->CNT;
int vol_delta = 0;
bool tx_vol_reset = 0;
while (1) {
uint16_t tim1_now = TIM1->CNT, tim3_now = TIM3->CNT;
int16_t tim1_delta = (int16_t)(tim1_now - tim1_last);
int16_t tim3_delta = (int16_t)(tim3_now - tim3_last);
vol_delta += tim3_delta - tim1_delta;
#define VOL_DELTA_INC 4
uint8_t keybits = 0;
if (!tx_vol_reset) {
if (vol_delta >= VOL_DELTA_INC) {
keybits |= KEYBITS_VOL_UP;
vol_delta -= VOL_DELTA_INC;
tx_vol_reset = 1;
} else if (vol_delta <= -VOL_DELTA_INC) {
keybits |= KEYBITS_VOL_DOWN;
vol_delta += VOL_DELTA_INC;
tx_vol_reset = 1;
}
} else {
tx_vol_reset = 0;
}
sendKeybits(keybits);
tim1_last = tim1_now;
tim3_last = tim3_now;
HAL_Delay(10);
}
}
const uint8_t _asciimap[128] =
{
0x00, // NUL
0x00, // SOH
0x00, // STX
0x00, // ETX
0x00, // EOT
0x00, // ENQ
0x00, // ACK
0x00, // BEL
0x2a, // BS Backspace
0x2b, // TAB Tab
0x28, // LF Enter
0x00, // VT
0x00, // FF
0x00, // CR
0x00, // SO
0x00, // SI
0x00, // DEL
0x00, // DC1
0x00, // DC2
0x00, // DC3
0x00, // DC4
0x00, // NAK
0x00, // SYN
0x00, // ETB
0x00, // CAN
0x00, // EM
0x00, // SUB
0x00, // ESC
0x00, // FS
0x00, // GS
0x00, // RS
0x00, // US
0x2c, // ' '
0x1e|0x80, // !
0x34|0x80, // "
0x20|0x80, // #
0x21|0x80, // $
0x22|0x80, // %
0x24|0x80, // &
0x34, // '
0x26|0x80, // (
0x27|0x80, // )
0x25|0x80, // *
0x2e|0x80, // +
0x36, // ,
0x2d, // -
0x37, // .
0x38, // /
0x27, // 0
0x1e, // 1
0x1f, // 2
0x20, // 3
0x21, // 4
0x22, // 5
0x23, // 6
0x24, // 7
0x25, // 8
0x26, // 9
0x33|0x80, // :
0x33, // ;
0x36|0x80, // <
0x2e, // =
0x37|0x80, // >
0x38|0x80, // ?
0x1f|0x80, // @
0x04|0x80, // A
0x05|0x80, // B
0x06|0x80, // C
0x07|0x80, // D
0x08|0x80, // E
0x09|0x80, // F
0x0a|0x80, // G
0x0b|0x80, // H
0x0c|0x80, // I
0x0d|0x80, // J
0x0e|0x80, // K
0x0f|0x80, // L
0x10|0x80, // M
0x11|0x80, // N
0x12|0x80, // O
0x13|0x80, // P
0x14|0x80, // Q
0x15|0x80, // R
0x16|0x80, // S
0x17|0x80, // T
0x18|0x80, // U
0x19|0x80, // V
0x1a|0x80, // W
0x1b|0x80, // X
0x1c|0x80, // Y
0x1d|0x80, // Z
0x2f, // [
0x31, // bslash
0x30, // ]
0x23|0x80, // ^
0x2d|0x80, // _
0x35, // `
0x04, // a
0x05, // b
0x06, // c
0x07, // d
0x08, // e
0x09, // f
0x0a, // g
0x0b, // h
0x0c, // i
0x0d, // j
0x0e, // k
0x0f, // l
0x10, // m
0x11, // n
0x12, // o
0x13, // p
0x14, // q
0x15, // r
0x16, // s
0x17, // t
0x18, // u
0x19, // v
0x1a, // w
0x1b, // x
0x1c, // y
0x1d, // z
0x2f|0x80, // {
0x31|0x80, // |
0x30|0x80, // }
0x35|0x80, // ~
0 // DEL
};
void sendChar(uint8_t ch){
if( ch > 128 ) ch -=128;
key.id = 1;
key.keycode[0]=_asciimap[ch]&0x7F;
key.keycode[1]=0;
if ( _asciimap[ch] & 0x80) key.modifier |= 0x02;
for(int i=0; i< 4;i++){
USBD_HID_SendReport(&hUsbDeviceFS, (uint8_t *)&key, sizeof(key));
HAL_Delay(10);
}
memset(key.keycode, 0 , sizeof(key.keycode));
key.modifier = 0;
USBD_HID_SendReport(&hUsbDeviceFS, (uint8_t *)&key, sizeof(key));
HAL_Delay(10);
}
void sendCharWrong(uint8_t ch){
key.id = 1;
key.keycode[0]=ch&0x7F;
key.keycode[1]=0;
if ( _asciimap[ch] & 0x80) key.modifier |= 0x02;
for(int i=0; i< 4;i++){
USBD_HID_SendReport(&hUsbDeviceFS, (uint8_t *)&key, sizeof(key));
HAL_Delay(10);
}
memset(key.keycode, 0 , sizeof(key.keycode));
key.modifier = 0;
USBD_HID_SendReport(&hUsbDeviceFS, (uint8_t *)&key, sizeof(key));
HAL_Delay(10);
}
void sendKeybits(uint8_t keybits){
uint8_t report[2];
report[0]= HID_MEDIA_REPORT;
report[1]= keybits;
USBD_HID_SendReport(&hUsbDeviceFS, report, 2);
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI14|RCC_OSCILLATORTYPE_HSI48;
RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
RCC_OscInitStruct.HSI14State = RCC_HSI14_ON;
RCC_OscInitStruct.HSI14CalibrationValue = 16;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI48;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1);
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit);
}
static void MX_GPIO_Init(void) {
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIOA->MODER = 0x28000000 | (2<<(8*2)) | (2<<(9*2));
GPIOB->MODER = (2<<(4*2)) | (2<<(5*2));
GPIOA->PUPDR = 0x24000000 | (1<<(8*2)) | (1<<(9*2));
GPIOB->PUPDR = (1<<(4*2)) | (1<<(5*2));
GPIOA->AFR[1]= 0x00000022;
GPIOB->AFR[0]= 0x00110000;
}
void Error_Handler(void)
{
while(1){
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_13,1);
HAL_Delay(100);
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_13,0);
HAL_Delay(100);
}
}
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