Fix incorrect DMA ISR handlers being used on STM32U0 (#458)

Author: multiplemonomials

targets/TARGET_STM/stm_dma_utils.c

@@ -399,7 +399,7 @@ IRQn_Type stm_get_dma_irqn(const DMALinkInfo *dmaLink)
         case 2:
             switch(dmaLink->channelIdx)
             {
-#ifdef TARGET_MCU_STM32G0
+#if defined(TARGET_MCU_STM32G0)
                 // STM32G0 does its own thing and has all DMA2 channels under 1 IRQ
                 case 1:
                 case 2:
@@ -924,6 +924,77 @@ void DMA1_Ch4_5_DMAMUX1_OVR_IRQHandler(void)
 }
 #endif
 
+#elif defined(TARGET_MCU_STM32U0)
+
+void DMA1_Channel2_3_IRQHandler(void)
+{
+    if(stmDMAHandles[0][1] != NULL) {
+        HAL_DMA_IRQHandler(stmDMAHandles[0][1]);
+    }
+    if(stmDMAHandles[0][2] != NULL) {
+        HAL_DMA_IRQHandler(stmDMAHandles[0][2]);
+    }
+}
+
+#ifdef DMA2
+void DMA1_Ch4_7_DMA2_Ch1_5_DMAMUX_OVR_IRQHandler(void)
+{
+    if(stmDMAHandles[0][3] != NULL) {
+        HAL_DMA_IRQHandler(stmDMAHandles[0][3]);
+    }
+    if(stmDMAHandles[0][4] != NULL) {
+        HAL_DMA_IRQHandler(stmDMAHandles[0][4]);
+    }
+    if(stmDMAHandles[0][5] != NULL) {
+        HAL_DMA_IRQHandler(stmDMAHandles[0][5]);
+    }
+    if(stmDMAHandles[0][6] != NULL) {
+        HAL_DMA_IRQHandler(stmDMAHandles[0][6]);
+    }
+    if(stmDMAHandles[1][0] != NULL) {
+        HAL_DMA_IRQHandler(stmDMAHandles[1][0]);
+    }
+    if(stmDMAHandles[1][1] != NULL) {
+        HAL_DMA_IRQHandler(stmDMAHandles[1][1]);
+    }
+    if(stmDMAHandles[1][2] != NULL) {
+        HAL_DMA_IRQHandler(stmDMAHandles[1][2]);
+    }
+    if(stmDMAHandles[1][3] != NULL) {
+        HAL_DMA_IRQHandler(stmDMAHandles[1][3]);
+    }
+    if(stmDMAHandles[1][4] != NULL) {
+        HAL_DMA_IRQHandler(stmDMAHandles[1][4]);
+    }
+}
+#elif defined(DMA1_Channel7)
+void DMA1_Ch4_7_DMAMUX_OVR_IRQHandler(void)
+{
+    if(stmDMAHandles[0][3] != NULL) {
+        HAL_DMA_IRQHandler(stmDMAHandles[0][3]);
+    }
+    if(stmDMAHandles[0][4] != NULL) {
+        HAL_DMA_IRQHandler(stmDMAHandles[0][4]);
+    }
+    if(stmDMAHandles[0][5] != NULL) {
+        HAL_DMA_IRQHandler(stmDMAHandles[0][5]);
+    }
+    if(stmDMAHandles[0][6] != NULL) {
+        HAL_DMA_IRQHandler(stmDMAHandles[0][6]);
+    }
+}
+#else
+void DMA1_Ch4_5_DMAMUX_OVR_IRQHandler(void)
+{
+    if(stmDMAHandles[0][3] != NULL) {
+        HAL_DMA_IRQHandler(stmDMAHandles[0][3]);
+    }
+    if(stmDMAHandles[0][4] != NULL) {
+        HAL_DMA_IRQHandler(stmDMAHandles[0][4]);
+    }
+}
+#endif
+
 #elif defined(TARGET_MCU_STM32L0)
 
 void DMA1_Channel2_3_IRQHandler(void)