chain40
123 lines
4.0 KiB
C
123 lines
4.0 KiB
C
#include <string.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#include "nrf_gpio.h"
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#include "nrf_uarte.h"
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#include "FreeRTOS.h"
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#include "semphr.h"
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#include "task.h"
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#include "nrf_log.h"
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#include "nrf_log_ctrl.h"
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#include "nrf_log_default_backends.h"
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#ifdef __cplusplus
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}
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#endif
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#define HOST_UART (NRF_UARTE0)
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#define HOST_UART_DRV_TX_PIN NRF_GPIO_PIN_MAP(0, 4)
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#define HOST_UART_DRV_RX_PIN NRF_GPIO_PIN_MAP(0, 27)
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static SemaphoreHandle_t uart_drv_tx_sem;
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static SemaphoreHandle_t uart_drv_rx_sem;
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static SemaphoreHandle_t uart_drv_tx_mutex;
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static SemaphoreHandle_t uart_drv_rx_mutex;
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uint32_t uart_drv_rx(void *p_data, uint16_t len)
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{
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if (nrfx_is_in_ram(p_data) == false)
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{
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__BKPT(255);
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}
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xSemaphoreTake(uart_drv_rx_mutex, portMAX_DELAY);
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nrf_uarte_rx_buffer_set(HOST_UART, p_data, len);
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nrf_uarte_event_clear(HOST_UART, NRF_UARTE_EVENT_RXTO);
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nrf_uarte_event_clear(HOST_UART, NRF_UARTE_EVENT_ENDRX);
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nrf_uarte_int_enable(HOST_UART, NRF_UARTE_INT_RXDRDY_MASK);
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nrf_uarte_event_clear(HOST_UART, NRF_UARTE_EVENT_RXDRDY);
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nrf_uarte_task_trigger(HOST_UART, NRF_UARTE_TASK_STARTRX);
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xSemaphoreTake(uart_drv_rx_sem, portMAX_DELAY);
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do {
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} while (xSemaphoreTake(uart_drv_rx_sem, pdMS_TO_TICKS(3)));
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nrf_uarte_task_trigger(HOST_UART, NRF_UARTE_TASK_STOPRX);
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xSemaphoreTake(uart_drv_rx_sem, portMAX_DELAY);
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uint32_t recv_bytes = nrf_uarte_rx_amount_get(HOST_UART);
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xSemaphoreGive(uart_drv_rx_mutex);
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return recv_bytes;
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}
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void uart_drv_tx(void *p_data, uint16_t len)
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{
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if (nrfx_is_in_ram(p_data) == false)
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{
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__BKPT(255);
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}
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xSemaphoreTake(uart_drv_tx_mutex, portMAX_DELAY);
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HOST_UART->TXD.PTR = (uint32_t)p_data;
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HOST_UART->TXD.MAXCNT = len;
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nrf_uarte_task_trigger(HOST_UART, NRF_UARTE_TASK_STARTTX);
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xSemaphoreTake(uart_drv_tx_sem, portMAX_DELAY);
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xSemaphoreGive(uart_drv_tx_mutex);
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}
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void uart_drv_init(void)
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{
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uart_drv_rx_sem = xSemaphoreCreateBinary();
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uart_drv_tx_sem = xSemaphoreCreateBinary();
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uart_drv_rx_mutex = xSemaphoreCreateMutex();
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uart_drv_tx_mutex = xSemaphoreCreateMutex();
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nrf_gpio_cfg_output(HOST_UART_DRV_TX_PIN);
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nrf_gpio_cfg_input(HOST_UART_DRV_RX_PIN, NRF_GPIO_PIN_NOPULL);
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nrf_uarte_configure(HOST_UART, NRF_UARTE_PARITY_EXCLUDED, NRF_UARTE_HWFC_DISABLED);
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nrf_uarte_baudrate_set(HOST_UART, NRF_UARTE_BAUDRATE_115200);
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nrf_uarte_txrx_pins_set(HOST_UART, HOST_UART_DRV_TX_PIN, HOST_UART_DRV_RX_PIN);
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nrf_uarte_hwfc_pins_disconnect(HOST_UART);
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nrf_uarte_enable(HOST_UART);
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// Enable interrput (for easyDMA)
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sd_nvic_SetPriority(UARTE0_UART0_IRQn, _PRIO_APP_MID);
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sd_nvic_EnableIRQ(UARTE0_UART0_IRQn);
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nrf_uarte_int_enable(HOST_UART, NRF_UARTE_INT_ENDTX_MASK | NRF_UARTE_INT_ENDRX_MASK | NRF_UARTE_INT_RXTO_MASK);
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}
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void UARTE0_UART0_IRQHandler(void)
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{
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if (nrf_uarte_event_check(HOST_UART, NRF_UARTE_EVENT_RXDRDY))
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{
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nrf_uarte_event_clear(HOST_UART, NRF_UARTE_EVENT_RXDRDY);
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BaseType_t xHigherPriorityTaskWoken;
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xSemaphoreGiveFromISR(uart_drv_rx_sem, &xHigherPriorityTaskWoken);
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portYIELD_FROM_ISR(xHigherPriorityTaskWoken);
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return;
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}
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if (nrf_uarte_event_check(HOST_UART, NRF_UARTE_EVENT_RXTO))
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{
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nrf_uarte_event_clear(HOST_UART, NRF_UARTE_EVENT_RXTO);
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nrf_uarte_task_trigger(HOST_UART, NRF_UARTE_TASK_FLUSHRX);
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return;
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}
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if (nrf_uarte_event_check(HOST_UART, NRF_UARTE_EVENT_ENDRX))
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{
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nrf_uarte_event_clear(HOST_UART, NRF_UARTE_EVENT_ENDRX);
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BaseType_t xHigherPriorityTaskWoken;
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xSemaphoreGiveFromISR(uart_drv_rx_sem, &xHigherPriorityTaskWoken);
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portYIELD_FROM_ISR(xHigherPriorityTaskWoken);
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return;
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}
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if (nrf_uarte_event_check(HOST_UART, NRF_UARTE_EVENT_ENDTX))
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{
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nrf_uarte_event_clear(HOST_UART, NRF_UARTE_EVENT_ENDTX);
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BaseType_t xHigherPriorityTaskWoken;
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xSemaphoreGiveFromISR(uart_drv_tx_sem, &xHigherPriorityTaskWoken);
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portYIELD_FROM_ISR(xHigherPriorityTaskWoken);
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return;
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}
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}
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