88cee4601a
* [FL-1885] USB-UART: app and worker * [FL-1885] USB-UART: UART on CDC0 Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>
106 lines
3.6 KiB
C
106 lines
3.6 KiB
C
#include <furi-hal-lpuart.h>
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#include <stdbool.h>
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#include <stm32wbxx_ll_gpio.h>
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#include <stm32wbxx_ll_lpuart.h>
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#include <furi.h>
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static void (*irq_cb)(uint8_t ev, uint8_t data);
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void furi_hal_lpuart_init() {
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LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
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GPIO_InitStruct.Pin = PC0_Pin|PC1_Pin;
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GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
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GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
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GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
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GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
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GPIO_InitStruct.Alternate = LL_GPIO_AF_8;
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LL_GPIO_Init(GPIOC, &GPIO_InitStruct);
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LL_RCC_SetLPUARTClockSource(LL_RCC_LPUART1_CLKSOURCE_PCLK1);
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LL_APB1_GRP2_EnableClock(LL_APB1_GRP2_PERIPH_LPUART1);
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LL_LPUART_InitTypeDef LPUART_InitStruct = {0};
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LPUART_InitStruct.PrescalerValue = LL_LPUART_PRESCALER_DIV1;
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LPUART_InitStruct.BaudRate = 115200;
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LPUART_InitStruct.DataWidth = LL_LPUART_DATAWIDTH_8B;
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LPUART_InitStruct.StopBits = LL_LPUART_STOPBITS_1;
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LPUART_InitStruct.Parity = LL_LPUART_PARITY_NONE;
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LPUART_InitStruct.TransferDirection = LL_LPUART_DIRECTION_TX_RX;
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LPUART_InitStruct.HardwareFlowControl = LL_LPUART_HWCONTROL_NONE;
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LL_LPUART_Init(LPUART1, &LPUART_InitStruct);
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LL_LPUART_SetTXFIFOThreshold(LPUART1, LL_LPUART_FIFOTHRESHOLD_1_8);
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LL_LPUART_SetRXFIFOThreshold(LPUART1, LL_LPUART_FIFOTHRESHOLD_1_8);
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LL_LPUART_EnableFIFO(LPUART1);
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LL_LPUART_Enable(LPUART1);
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while((!(LL_LPUART_IsActiveFlag_TEACK(LPUART1))) || (!(LL_LPUART_IsActiveFlag_REACK(LPUART1))));
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LL_LPUART_EnableIT_RXNE_RXFNE(LPUART1);
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LL_LPUART_EnableIT_IDLE(LPUART1);
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HAL_NVIC_SetPriority(LPUART1_IRQn, 5, 0);
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FURI_LOG_I("FuriHalLpUart", "Init OK");
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}
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void furi_hal_lpuart_set_br(uint32_t baud) {
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if (LL_LPUART_IsEnabled(LPUART1)) {
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// Wait for transfer complete flag
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while (!LL_LPUART_IsActiveFlag_TC(LPUART1));
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LL_LPUART_Disable(LPUART1);
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uint32_t uartclk = LL_RCC_GetLPUARTClockFreq(LL_RCC_GetLPUARTClockSource(LL_RCC_LPUART1_CLKSOURCE_PCLK1));
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if (uartclk/baud > 4095) {
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LL_LPUART_SetPrescaler(LPUART1, LL_LPUART_PRESCALER_DIV32);
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LL_LPUART_SetBaudRate(LPUART1, uartclk, LL_LPUART_PRESCALER_DIV32, baud);
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} else {
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LL_LPUART_SetPrescaler(LPUART1, LL_LPUART_PRESCALER_DIV1);
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LL_LPUART_SetBaudRate(LPUART1, uartclk, LL_LPUART_PRESCALER_DIV1, baud);
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}
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LL_LPUART_Enable(LPUART1);
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}
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}
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void furi_hal_lpuart_deinit() {
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furi_hal_lpuart_set_irq_cb(NULL);
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LL_GPIO_SetPinMode(GPIOC, PC0_Pin, LL_GPIO_MODE_ANALOG);
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LL_GPIO_SetPinMode(GPIOC, PC1_Pin, LL_GPIO_MODE_ANALOG);
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LL_LPUART_Disable(LPUART1);
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LL_APB1_GRP2_DisableClock(LL_APB1_GRP2_PERIPH_LPUART1);
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}
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void furi_hal_lpuart_tx(const uint8_t* buffer, size_t buffer_size) {
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if (LL_LPUART_IsEnabled(LPUART1) == 0)
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return;
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while(buffer_size > 0) {
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while (!LL_LPUART_IsActiveFlag_TXE(LPUART1));
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LL_LPUART_TransmitData8(LPUART1, *buffer);
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buffer++;
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buffer_size--;
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}
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}
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void furi_hal_lpuart_set_irq_cb(void (*cb)(UartIrqEvent ev, uint8_t data)) {
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irq_cb = cb;
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if (irq_cb == NULL)
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NVIC_DisableIRQ(LPUART1_IRQn);
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else
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NVIC_EnableIRQ(LPUART1_IRQn);
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}
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void LPUART1_IRQHandler(void) {
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if (LL_LPUART_IsActiveFlag_RXNE_RXFNE(LPUART1)) {
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uint8_t data = LL_LPUART_ReceiveData8(LPUART1);
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irq_cb(UartIrqEventRXNE, data);
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} else if (LL_LPUART_IsActiveFlag_IDLE(LPUART1)) {
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irq_cb(UartIrqEventIDLE, 0);
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LL_LPUART_ClearFlag_IDLE(LPUART1);
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}
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//TODO: more events
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}
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