big refactoring and features added

App/Devices/uart_transport.c

@@ -0,0 +1,68 @@
+/**
+ * @file uart_transport.c
+ * @brief USART1 transmit helpers used by the application core.
+ */
+
+#include "uart_transport.h"
+
+#include "main.h"
+
+static volatile uint8_t g_dma_busy = 0u;
+
+void uart_transport_init(void)
+{
+    LL_DMA_DisableStream(DMA2, LL_DMA_STREAM_7);
+    LL_DMA_ClearFlag_TC7(DMA2);
+    LL_DMA_ClearFlag_TE7(DMA2);
+    LL_USART_EnableDMAReq_TX(USART1);
+    LL_DMA_EnableIT_TC(DMA2, LL_DMA_STREAM_7);
+    LL_DMA_EnableIT_TE(DMA2, LL_DMA_STREAM_7);
+    g_dma_busy = 0u;
+}
+
+void uart_transport_reset(void)
+{
+    g_dma_busy = 0u;
+}
+
+void uart_transport_send_blocking(const uint8_t *data, uint16_t size)
+{
+    uint16_t index;
+
+    for (index = 0u; index < size; ++index)
+    {
+        while (!LL_USART_IsActiveFlag_TXE(USART1))
+        {
+        }
+        LL_USART_TransmitData8(USART1, data[index]);
+    }
+}
+
+void uart_transport_send_dma(const uint8_t *data, uint16_t size)
+{
+    while (g_dma_busy != 0u)
+    {
+    }
+
+    LL_DMA_DisableStream(DMA2, LL_DMA_STREAM_7);
+    LL_DMA_ClearFlag_TC7(DMA2);
+    LL_DMA_ClearFlag_TE7(DMA2);
+    LL_DMA_ConfigAddresses(DMA2,
+                           LL_DMA_STREAM_7,
+                           (uint32_t)data,
+                           LL_USART_DMA_GetRegAddr(USART1, LL_USART_DMA_REG_DATA_TRANSMIT),
+                           LL_DMA_GetDataTransferDirection(DMA2, LL_DMA_STREAM_7));
+    LL_DMA_SetDataLength(DMA2, LL_DMA_STREAM_7, size);
+    g_dma_busy = 1u;
+    LL_DMA_EnableStream(DMA2, LL_DMA_STREAM_7);
+}
+
+void uart_transport_mark_dma_complete(void)
+{
+    g_dma_busy = 0u;
+}
+
+bool uart_transport_is_dma_busy(void)
+{
+    return g_dma_busy != 0u;
+}